const lmeState = {
    map: null,
    baseLayers: {},
    currentBase: null,
    currentBaseName: "satellite",
    layerOrder: [
        "gpsPosition",
        "drawings",
        "gpsTrail",
        "gpsParcels",
        "selectedParcels",
        "importedSheets",
        "imported",
        "cadastre"
    ],
    cadastre: null,
    cadastreLayers: ["CP.CadastralParcel", "codice_plla", "CP.CadastralZoning", "fabbricati"],
    cadastreOpacity: 0.75,
    imported: null,
    importedVisible: true,
    importedSheets: null,
    importedSheetsVisible: false,
    importedMeasurements: null,
    drawings: null,
    drawingsRenderer: null,
    drawingSelection: null,
    drawingMeasurements: null,
    drawControl: null,
    drawingDeleteButton: null,
    drawingScopeMenu: null,
    ignoreMapClickUntil: 0,
    activeDrawHandler: null,
    drawEventsBound: false,
    includeKmlSheetLayer: false,
    showImportedMeasurements: false,
    showDrawingMeasurements: true,
    measurementRefreshTimer: null,
    gpsMarker: null,
    gpsAccuracy: null,
    gpsPositionVisible: true,
    hasLiveGpsFix: false,
    lastAccuracy: 0,
    gpsTrail: null,
    selectedParcelsLayer: null,
    selectedParcelsVisible: true,
    gpsParcelLayer: null,
    gpsTrailEnabled: false,
    gpsTrailPoints: [],
    gpsTrailStartedAt: null,
    gpsWatchId: null,
    lastPosition: null,
    fileImportBound: false,
    resizeBound: false,
    googleMapsLoading: null,
    azureMapsKey: null,
    azureAttribution: null,
    managerHighlight: null,
    managerHighlightedObjectId: null,
    managerHighlightedCategoryKey: null,
    managerHighlightedParentKey: null,
    managerHighlightedParentRecords: null,
    managerHoveredParentKey: null,
    managerHoveredParentRecords: null,
    managerOutsideSelectionBound: false,
    managerHiddenObjects: new Map(),
    managerHiddenObjectIds: new Set(),
    managerHiddenMeasurementSummaryIds: new Set(),
    managerHiddenMeasurementSideIds: new Set(),
    managerHiddenCategories: new Set(),
    managerRemovedCategories: new Set(),
    managerObjectOrder: {},
    managerCategoryNames: {},
    managerExpandedRows: new Set(),
    managerSelectedObjectIds: new Set(),
    managerSearchText: "",
    permanentLabels: null,
    undoStack: [],
    redoStack: [],
    historyBusy: false,
    snapEnabled: true,
    snapDistancePixels: 14,
    autoSaveEnabled: true,
    gpsProximityEnabled: true,
    gpsBoundaryAlertEnabled: false,
    lastBoundaryState: null,
    trash: [],
    auditLog: [],
    isDirty: false,
    readOnly: false,
    changeNotifyTimer: null,
    offlineDbPromise: null,
    offlineTileCount: 0,
    dotNetReference: null
};

// AdE publishes the cadastral WMS in ETRS89. WMS 1.1.1 keeps the longitude,
// latitude BBOX order expected by Leaflet while sending the required CRS code.
const cadastreCrs = L.extend({}, L.CRS.EPSG4326, { code: "EPSG:4258" });

window.lmeMap = {
    init,
    showSearchResult,
    showInitialPosition,
    displayOfficialParcel,
    exportCadastreView,
    closeCadastrePreview,
    clearSelectedParcels,
    setSelectedParcelsVisible,
    clearMapElements,
    fitImported,
    clearImported,
    setIncludeKmlSheetLayer,
    setImportedLayerVisible,
    setImportedSheetLayerVisible,
    setLayerOrder,
    refreshLayerManager,
    clearLayerManagerSelection: clearManagerHighlight,
    setImportedMeasurementsVisible,
    setDrawingMeasurementsVisible,
    addProjectMarker,
    startMeasurementDrawing,
    setDrawToolsVisible,
    clearDrawings,
    undoMapChange,
    redoMapChange,
    getHistoryState,
    markProjectSaved,
    hasUnsavedChanges: () => lmeState.isDirty,
    confirmDiscardChanges,
    setProjectReadOnly,
    restoreAutosave,
    compareProjectSnapshots,
    setAdvancedOptions,
    createMapExportGeoJson,
    createProjectSnapshot,
    loadProjectSnapshot,
    getLegacyProjectSnapshot,
    clearLegacyProjectSnapshot,
    setBaseLayer,
    configureGoogleMaps,
    configureAzureMaps,
    clearAzureMaps,
    setCadastreOpacity,
    toggleCadastreLayer,
    startGps,
    stopGps,
    centerOnGps,
    toggleTrail,
    clearGpsTrail,
    getGpsTrailStats,
    setNativeGpsPosition,
    setGpsPositionVisible,
    setGpsError,
    saveGpsMeasurementPoint,
    restoreLastTrashItem,
    emptyTrash,
    showObjectTable,
    showAuditLog,
    showCoordinateInspector,
    validateAndRepairSelected,
    createHoleFromSelected,
    compareSelectedGeometries,
    downloadOfflineArea,
    clearOfflineTiles,
    getOfflineTileStats,
    resize,
    showInfo: setInfo
};

function init(dotNetReference) {
    if (dotNetReference) {
        lmeState.dotNetReference = dotNetReference;
    }
    if (lmeState.map) {
        return;
    }

    lmeState.map = L.map("map", {
        zoomControl: false,
        attributionControl: false
    }).setView([41.9028, 12.4964], 17);

    L.control.zoom({ position: "bottomright" }).addTo(lmeState.map);

    lmeState.baseLayers.osm = L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
        maxNativeZoom: 19,
        maxZoom: 22,
        attribution: "© OpenStreetMap contributors"
    });

    lmeState.baseLayers.satellite = L.tileLayer("https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}", {
        maxNativeZoom: 19,
        maxZoom: 22,
        attribution: "Tiles © Esri"
    });

    lmeState.baseLayers.topographic = L.tileLayer("https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}", {
        maxNativeZoom: 19,
        maxZoom: 22,
        attribution: "Tiles © Esri"
    });

    lmeState.baseLayers["streets-esri"] = L.tileLayer("https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}", {
        maxNativeZoom: 19,
        maxZoom: 22,
        attribution: "Tiles © Esri"
    });

    lmeState.baseLayers.terrain = L.tileLayer("https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png", {
        maxNativeZoom: 17,
        maxZoom: 22,
        attribution: "Map data © OpenStreetMap contributors, SRTM | Map style © OpenTopoMap"
    });

    lmeState.baseLayers.carto = L.tileLayer("https://{s}.basemaps.cartocdn.com/rastertiles/voyager/{z}/{x}/{y}{r}.png", {
        subdomains: "abcd",
        maxNativeZoom: 20,
        maxZoom: 22,
        attribution: "© OpenStreetMap contributors © CARTO"
    });
    lmeState.baseLayers.offline = createOfflineTileLayer();

    lmeState.currentBase = lmeState.baseLayers.satellite.addTo(lmeState.map);
    restoreLayerOrder();
    Object.values(managedLayerPanes()).forEach(paneName => {
        if (!lmeState.map.getPane(paneName)) {
            lmeState.map.createPane(paneName);
        }
    });
    const managerHighlightPane = lmeState.map.createPane("managerHighlightPane");
    managerHighlightPane.style.zIndex = "650";
    lmeState.drawingsRenderer = L.canvas({ pane: "drawingsPane", tolerance: 14 });
    setLayerOrder(lmeState.layerOrder);
    lmeState.imported = L.featureGroup().addTo(lmeState.map);
    lmeState.importedSheets = L.featureGroup();
    lmeState.drawings = L.featureGroup().addTo(lmeState.map);
    lmeState.drawingSelection = L.featureGroup();
    lmeState.importedMeasurements = L.layerGroup().addTo(lmeState.map);
    lmeState.drawingMeasurements = L.layerGroup().addTo(lmeState.map);
    lmeState.selectedParcelsLayer = L.featureGroup().addTo(lmeState.map);
    lmeState.gpsParcelLayer = L.featureGroup().addTo(lmeState.map);
    lmeState.gpsTrail = L.polyline([], {
        pane: "gpsTrailPane",
        color: "#f97316",
        weight: 4,
        opacity: 0.85
    }).addTo(lmeState.map);
    lmeState.managerHighlight = L.layerGroup().addTo(lmeState.map);
    lmeState.permanentLabels = L.layerGroup().addTo(lmeState.map);

    refreshCadastreLayer();
    bindFileImport();
    bindDrawingEvents();

    if (!lmeState.resizeBound) {
        window.addEventListener("resize", resize);
        window.addEventListener("orientationchange", resize);
        lmeState.resizeBound = true;
    }

    lmeState.map.on("click", async event => {
        if (event.originalEvent?._lmeDrawingSelected || Date.now() < lmeState.ignoreMapClickUntil) {
            return;
        }
        hideDrawingScopeMenu();
        clearManagerHighlight();
        const info = await queryFeatureInfo(event.latlng);
        if (info) {
            L.popup().setLatLng(event.latlng).setContent(info).openOn(lmeState.map);
        }
    });
    lmeState.map.on("moveend", () => {
        void updateAzureAttribution();
        scheduleMeasurementRefresh();
    });

    document.getElementById("closeWmsPreview")?.addEventListener("click", closeCadastrePreview);
    document.getElementById("wmsPreview")?.addEventListener("click", event => {
        if (event.target?.id === "wmsPreview") {
            closeCadastrePreview();
        }
    });
    document.addEventListener("keydown", event => {
        if (event.key === "Escape") {
            closeCadastrePreview();
        }
        if ((event.ctrlKey || event.metaKey) && !event.shiftKey && event.key.toLowerCase() === "z") {
            event.preventDefault();
            undoMapChange();
        } else if ((event.ctrlKey || event.metaKey) && (event.key.toLowerCase() === "y" || (event.shiftKey && event.key.toLowerCase() === "z"))) {
            event.preventDefault();
            redoMapChange();
        }
    });
    window.addEventListener("beforeunload", event => {
        if (!lmeState.isDirty) return;
        event.preventDefault();
        event.returnValue = "";
    });
    if (!lmeState.managerOutsideSelectionBound) {
        document.addEventListener("pointerdown", event => {
            if (lmeState.drawingScopeMenu
                && !event.target?.closest?.(".lme-drawing-scope-actions")
                && !event.target?.closest?.(".leaflet-draw-edit-edit, .leaflet-draw-edit-remove")) {
                hideDrawingScopeMenu();
            }
            if (!lmeState.managerHighlightedObjectId && !lmeState.managerHighlightedParentKey) {
                return;
            }
            if (event.target?.closest?.(".leaflet-draw")) {
                return;
            }
            const selectedObject = event.target?.closest?.(".layer-manager-object");
            const selectedParent = event.target?.closest?.("[data-highlight-key]");
            if (selectedObject?.dataset.objectId === lmeState.managerHighlightedObjectId
                || selectedParent?.dataset.highlightKey === lmeState.managerHighlightedParentKey) {
                return;
            }
            clearManagerHighlight();
        });
        lmeState.managerOutsideSelectionBound = true;
    }

    setInfo("Mappa pronta: satellite + catasto AdE");
}

function showSearchResult(latitude, longitude, label) {
    const lat = Number(latitude);
    const lon = Number(longitude);
    if (!Number.isFinite(lat) || !Number.isFinite(lon)) {
        setInfo("La ricerca ha restituito coordinate non valide.");
        return;
    }

    lmeState.map.setView([lat, lon], 18);
    setInfo(label || `${lat.toFixed(6)}, ${lon.toFixed(6)}`);
}

function showInitialPosition(latitudeValue, longitudeValue, approximate, label) {
    const latitude = Number(latitudeValue);
    const longitude = Number(longitudeValue);
    if (!Number.isFinite(latitude) || !Number.isFinite(longitude)) {
        return;
    }

    const latlng = [latitude, longitude];
    if (!approximate) {
        lmeState.lastPosition = latlng;
    }
    lmeState.map.setView(latlng, approximate ? 13 : 19);
    setText("gpsState", approximate
        ? "Posizione approssimativa dalla connessione - GPS non attivo"
        : "Posizione iniziale acquisita - GPS non attivo");
    setInfo(approximate
        ? `Mappa centrata in modo approssimativo su ${label || "questa zona"}.`
        : "Mappa centrata sulla posizione attuale. GPS continuo non attivo.");
    if (!approximate) {
        updateGpsInsideState();
    }
}

function displayOfficialParcel(xmlText, latitude, longitude, parcel, label, shouldFit) {
    const lat = Number(latitude);
    const lon = Number(longitude);
    if (!Number.isFinite(lat) || !Number.isFinite(lon)) {
        setInfo("Coordinate della particella non valide.");
        return;
    }

    try {
        const geojson = gmlParcelsToGeoJson(xmlText);
        const normalizedParcel = normalizeParcel(parcel);
        const featureByNumber = normalizedParcel
            ? (geojson.features || []).find(item => {
                const props = item.properties || {};
                return String(props.LABEL || "").trim().toUpperCase() === normalizedParcel
                    || String(props.NATIONALCADASTRALREFERENCE || "").toUpperCase().endsWith(`.${normalizedParcel}`);
            })
            : null;
        const feature = featureByNumber
            || (geojson.features || []).find(item => geometryContainsPoint(item.geometry, [lon, lat]))
            || geojson.features?.[0];

        if (!feature) {
            if (shouldFit) {
                lmeState.map.setView([lat, lon], 20);
            }
            setInfo("Posizione trovata, ma il servizio WFS dell'Agenzia non ha restituito il confine. Riprova tra poco.");
            return;
        }

        const ref = feature.properties?.NATIONALCADASTRALREFERENCE || feature.properties?.INSPIREID_LOCALID || label;
        const targetGroup = normalizedParcel ? lmeState.selectedParcelsLayer : lmeState.gpsParcelLayer;
        if (!normalizedParcel) {
            targetGroup.clearLayers();
        }

        const existingLayer = normalizedParcel
            ? findParcelLayerByReference(targetGroup, ref)
            : null;
        if (existingLayer) {
            if (shouldFit) {
                fitLayer(existingLayer);
            }
            setText("parcelState", `Particella selezionata: ${ref}`);
            setInfo(`La particella ${ref} e' gia evidenziata sulla mappa.`);
            return;
        }

        const layer = L.geoJSON(feature, {
            pane: normalizedParcel ? "selectedParcelsPane" : "gpsParcelsPane",
            style: normalizedParcel
                ? { color: "#ef4444", weight: 4, opacity: 1, fillColor: "#fbbf24", fillOpacity: 0.26 }
                : { color: "#1d4ed8", weight: 4, opacity: 1, fillColor: "#38bdf8", fillOpacity: 0.2 }
        }).addTo(targetGroup);
        layer.lmeParcelReference = ref;
        layer.bindPopup(`<strong>${escapeHtml(ref)}</strong>`);
        if (shouldFit) {
            fitLayer(layer);
        }

        if (normalizedParcel) {
            setText("parcelState", `Particella selezionata: ${ref}`);
            const count = lmeState.selectedParcelsLayer.getLayers().length;
            setInfo(`Aggiunta ${ref}. Particelle evidenziate: ${count}.`);
        } else {
            setText("parcelState", `Dentro particella AdE: ${ref}`);
        }
        refreshLayerManager();
    } catch (error) {
        setInfo(`Geometria catastale non leggibile: ${error.message}`);
    }
}

function normalizeParcel(parcel) {
    return String(parcel || "").trim().toUpperCase();
}

function findParcelLayerByReference(group, reference) {
    let match = null;
    group.eachLayer(layer => {
        if (match) {
            return;
        }
        if (layer.lmeParcelReference === reference) {
            match = layer;
            return;
        }
        if (typeof layer.eachLayer === "function") {
            match = findParcelLayerByReference(layer, reference);
        }
    });
    return match;
}

function resize() {
    if (!lmeState.map) {
        return;
    }
    window.setTimeout(() => lmeState.map.invalidateSize({ pan: false }), 50);
}

function exportCadastreView() {
    const layers = activeCadastreLayers();
    if (!layers.length) {
        setInfo("Attiva almeno un layer catastale prima di aprire la vista WMS.");
        return;
    }

    const bounds = lmeState.map.getBounds();
    const size = lmeState.map.getSize();
    const scale = Math.min(1, 1200 / size.x, 1200 / size.y);
    const width = Math.max(256, Math.round(size.x * scale));
    const height = Math.max(256, Math.round(size.y * scale));
    const bbox = [bounds.getSouth(), bounds.getWest(), bounds.getNorth(), bounds.getEast()].join(",");
    const params = new URLSearchParams({
        service: "WMS",
        version: "1.3.0",
        request: "GetMap",
        layers: layers.join(","),
        styles: "",
        format: "image/png",
        transparent: "true",
        width: String(width),
        height: String(height),
        crs: "EPSG:4258",
        bbox
    });
    const preview = document.getElementById("wmsPreview");
    const previewBody = preview?.querySelector(".wms-preview-body");
    const previewMap = document.getElementById("wmsPreviewMap");
    const image = document.getElementById("wmsPreviewImage");
    const overlay = document.getElementById("wmsPreviewOverlay");
    const loading = document.getElementById("wmsPreviewLoading");
    if (!preview || !previewBody || !previewMap || !image || !overlay || !loading) {
        setInfo("Vista WMS interna non disponibile.");
        return;
    }

    preview.hidden = false;
    const availableWidth = Math.max(1, previewBody.clientWidth - 24);
    const availableHeight = Math.max(1, previewBody.clientHeight - 24);
    const displayScale = Math.min(1, availableWidth / width, availableHeight / height);
    previewMap.style.width = `${Math.max(1, Math.round(width * displayScale))}px`;
    previewMap.style.height = `${Math.max(1, Math.round(height * displayScale))}px`;
    previewMap.hidden = true;
    renderPreviewParcelOverlay(overlay, bounds, width, height);

    loading.textContent = "Caricamento...";
    loading.hidden = false;
    image.onload = () => {
        loading.hidden = true;
        previewMap.hidden = false;
        const highlightedCount = lmeState.selectedParcelsLayer.getLayers().length
            + lmeState.gpsParcelLayer.getLayers().length;
        const zoomHint = layers.includes("codice_plla") && lmeState.map.getZoom() < 17
            ? " Ingrandisci almeno fino a zoom 17 per leggere i numeri delle particelle."
            : "";
        setInfo(`Vista WMS caricata con ${layers.length} layer e ${highlightedCount} particelle evidenziate.${zoomHint}`);
    };
    image.onerror = () => {
        previewMap.hidden = true;
        loading.textContent = "Il servizio WMS non ha restituito l'immagine. Riprova tra poco.";
        setInfo("Vista WMS non disponibile.");
    };
    image.src = `${cadastreUrl()}${params}`;
}

function closeCadastrePreview() {
    const preview = document.getElementById("wmsPreview");
    const previewMap = document.getElementById("wmsPreviewMap");
    const image = document.getElementById("wmsPreviewImage");
    const overlay = document.getElementById("wmsPreviewOverlay");
    if (preview) {
        preview.hidden = true;
    }
    if (previewMap) {
        previewMap.hidden = true;
    }
    if (image) {
        image.onload = null;
        image.onerror = null;
        image.removeAttribute("src");
    }
    overlay?.replaceChildren();
}

function renderPreviewParcelOverlay(svg, bounds, width, height) {
    svg.replaceChildren();
    svg.setAttribute("viewBox", `0 0 ${width} ${height}`);
    appendPreviewGeometry(svg, lmeState.selectedParcelsLayer.toGeoJSON(), "wms-preview-parcel", bounds, width, height);
    appendPreviewGeometry(svg, lmeState.gpsParcelLayer.toGeoJSON(), "wms-preview-gps-parcel", bounds, width, height);
}

function appendPreviewGeometry(svg, featureCollection, className, bounds, width, height) {
    const namespace = "http://www.w3.org/2000/svg";
    for (const feature of featureCollection?.features || []) {
        for (const polygon of geometryPolygons(feature.geometry)) {
            const pathData = polygon
                .map(ring => ring
                    .map((coordinate, index) => {
                        const point = previewPixel(coordinate, bounds, width, height);
                        return `${index ? "L" : "M"}${point.x.toFixed(2)} ${point.y.toFixed(2)}`;
                    })
                    .join(" ") + " Z")
                .join(" ");
            if (!pathData.trim()) {
                continue;
            }
            const path = document.createElementNS(namespace, "path");
            path.setAttribute("d", pathData);
            path.setAttribute("class", className);
            svg.appendChild(path);
        }
    }
}

function geometryPolygons(geometry) {
    if (!geometry) {
        return [];
    }
    if (geometry.type === "Polygon") {
        return [geometry.coordinates || []];
    }
    if (geometry.type === "MultiPolygon") {
        return geometry.coordinates || [];
    }
    if (geometry.type === "GeometryCollection") {
        return (geometry.geometries || []).flatMap(geometryPolygons);
    }
    return [];
}

function previewPixel(coordinate, bounds, width, height) {
    const longitude = Number(coordinate?.[0]);
    const latitude = Number(coordinate?.[1]);
    return {
        x: ((longitude - bounds.getWest()) / (bounds.getEast() - bounds.getWest())) * width,
        y: ((bounds.getNorth() - latitude) / (bounds.getNorth() - bounds.getSouth())) * height
    };
}

function bindFileImport() {
    if (lmeState.fileImportBound) {
        return;
    }

    document.addEventListener("change", async event => {
        if (event.target?.id !== "gisFileInput") {
            return;
        }

        const file = event.target.files?.[0];
        if (!file) {
            return;
        }

        try {
            if (file.size > 100 * 1024 * 1024) throw new Error("file superiore a 100 MB; suddividilo prima dell'importazione");
            setInfo(`Analisi di ${file.name} (${(file.size / 1024 / 1024).toFixed(1)} MB)...`);
            await new Promise(resolve => window.setTimeout(resolve, 20));
            const result = await readGisFile(file);
            rememberMapChange();
            const geojson = result.geojson;
            const parcelLayer = addImportedFeatures(geojson);
            const sheetGeojson = result.sheetGeojson || emptyFeatureCollection();
            const sheetLayer = addImportedSheetFeatures(sheetGeojson);
            applyImportedSheetVisibility();
            fitLayer(geojson.features.length ? parcelLayer : sheetLayer);
            refreshImportedMeasurements();
            const featureCount = geojson.features.length;
            const sheetCount = sheetGeojson.features.length;
            const ignored = result.ignoredCount
                ? `; esclusi ${result.ignoredCount} elementi del foglio o non particella`
                : "";
            const includedSheets = sheetCount
                ? `; ${sheetCount} elementi foglio ${lmeState.importedSheetsVisible ? "visibili" : "nascosti"}`
                : "";
            const reprojected = result.reprojected ? "; coordinate Web Mercator convertite" : "";
            const warnings = result.validationWarnings ? `; ${result.validationWarnings} geometrie da verificare` : "";
            setInfo(`Caricato ${file.name}: ${featureCount} particelle/elementi${includedSheets}${ignored}${reprojected}${warnings}.`);
            updateGpsInsideState();
            refreshLayerManager();
            finishMapChange();
        } catch (error) {
            setInfo(`File non leggibile: ${error.message}`);
        } finally {
            event.target.value = "";
        }
    });
    lmeState.fileImportBound = true;
}

async function readGisFile(file) {
    const lowerName = file.name.toLowerCase();

    if (lowerName.endsWith(".geojson") || lowerName.endsWith(".json")) {
        const text = (await readFileText(file)).replace(/^\uFEFF/, "").trim();
        if (!text) {
            throw new Error("GeoJSON vuoto");
        }
        let parsed;
        try {
            parsed = JSON.parse(text);
            if (typeof parsed === "string") {
                parsed = JSON.parse(parsed);
            }
        } catch (error) {
            throw new Error(`GeoJSON non valido: ${error.message}`);
        }
        return normalizeGeoJson(parsed, file.name);
    }

    if (lowerName.endsWith(".kml")) {
        return normalizeKmlFiles([{ name: file.name, text: await readFileText(file) }]);
    }

    if (lowerName.endsWith(".kmz")) {
        const zip = await JSZip.loadAsync(await file.arrayBuffer());
        const kmlEntries = Object.values(zip.files).filter(entry =>
            !entry.dir
            && !entry.name.startsWith("__MACOSX/")
            && entry.name.toLowerCase().endsWith(".kml"));
        if (!kmlEntries.length) {
            throw new Error("KMZ senza file KML interno");
        }
        const files = await Promise.all(kmlEntries.map(async entry => ({
            name: entry.name,
            text: await entry.async("text")
        })));
        return normalizeKmlFiles(files);
    }

    throw new Error("Formato supportato: KML, KMZ, GeoJSON");
}

function readFileText(file) {
    if (typeof file.text === "function") {
        return file.text();
    }
    return new Promise((resolve, reject) => {
        const reader = new FileReader();
        reader.onload = () => resolve(String(reader.result || ""));
        reader.onerror = () => reject(new Error("lettura del file non riuscita"));
        reader.readAsText(file);
    });
}

function normalizeGeoJson(value, fileName) {
    let root;
    if (Array.isArray(value)) {
        root = {
            type: "FeatureCollection",
            features: value.map(item => item?.type === "Feature"
                ? item
                : { type: "Feature", properties: {}, geometry: item })
        };
    } else if (value?.type === "FeatureCollection") {
        root = value;
    } else if (value?.type === "Feature") {
        root = { type: "FeatureCollection", features: [value], crs: value.crs };
    } else if (isGeoJsonGeometry(value)) {
        root = {
            type: "FeatureCollection",
            features: [{ type: "Feature", properties: {}, geometry: value }],
            crs: value.crs
        };
    } else {
        throw new Error("il contenuto non e' un Feature, una geometria o una FeatureCollection");
    }

    root.features = (root.features || []).filter(feature => feature?.type === "Feature" && feature.geometry);
    if (!root.features.length) {
        throw new Error("nessuna geometria presente nel GeoJSON");
    }
    root.features.forEach(feature => {
        feature.properties = feature.properties && typeof feature.properties === "object"
            ? feature.properties
            : {};
        feature.properties._lmeSource = feature.properties._lmeSource || fileName;
    });

    const crsText = root.crs ? JSON.stringify(root.crs).toUpperCase() : "";
    const coordinates = collectGeoJsonCoordinates(root);
    const hasProjectedCoordinates = coordinates.some(point => Math.abs(point[0]) > 180 || Math.abs(point[1]) > 90);
    const webMercator = /EPSG[^0-9]*(3857|900913)/.test(crsText)
        || (!crsText && hasProjectedCoordinates && coordinates.every(point =>
            Math.abs(point[0]) <= 20037508.35 && Math.abs(point[1]) <= 20048966.1));

    if (webMercator) {
        root.features.forEach(feature => {
            feature.geometry = transformGeoJsonGeometry(feature.geometry, webMercatorToWgs84);
        });
    } else if (crsText && !/(4326|4258|CRS84|CRS:84)/.test(crsText)) {
        throw new Error(`sistema di coordinate non supportato (${crsText.slice(0, 80)})`);
    }

    let validationWarnings = 0;
    const unique = new Set();
    root.features = root.features.filter(feature => {
        try { turf.cleanCoords(feature, { mutate: true }); } catch { }
        const key = JSON.stringify(feature.geometry);
        if (unique.has(key)) return false;
        unique.add(key);
        if (typeof turf.booleanValid === "function" && !turf.booleanValid(feature)) {
            feature.properties._lmeValidationWarning = "Geometria non valida: usa Controlla e ripara";
            validationWarnings++;
        }
        return true;
    });
    if (root.features.length > 5000 && window.confirm(`Il file contiene ${root.features.length} geometrie. Semplificarle leggermente per migliorare le prestazioni?`)) {
        root.features = root.features.map(feature => {
            try { return turf.simplify(feature, { tolerance: 0.000001, highQuality: true, mutate: false }); } catch { return feature; }
        });
    }

    const normalizedCoordinates = collectGeoJsonCoordinates(root);
    if (!normalizedCoordinates.length || normalizedCoordinates.some(point =>
        !Number.isFinite(point[0])
        || !Number.isFinite(point[1])
        || Math.abs(point[0]) > 180
        || Math.abs(point[1]) > 90)) {
        throw new Error("coordinate non valide o non espresse in WGS84/EPSG:4326");
    }

    delete root.crs;
    return {
        geojson: root,
        sheetGeojson: emptyFeatureCollection(),
        ignoredCount: 0,
        reprojected: webMercator,
        validationWarnings
    };
}

function isGeoJsonGeometry(value) {
    return [
        "Point",
        "MultiPoint",
        "LineString",
        "MultiLineString",
        "Polygon",
        "MultiPolygon",
        "GeometryCollection"
    ].includes(value?.type);
}

function collectGeoJsonCoordinates(geojson) {
    const points = [];
    const visitGeometry = geometry => {
        if (!geometry) {
            return;
        }
        if (geometry.type === "GeometryCollection") {
            (geometry.geometries || []).forEach(visitGeometry);
            return;
        }
        const visit = coordinates => {
            if (Array.isArray(coordinates)
                && coordinates.length >= 2
                && typeof coordinates[0] === "number"
                && typeof coordinates[1] === "number") {
                points.push(coordinates);
                return;
            }
            if (Array.isArray(coordinates)) {
                coordinates.forEach(visit);
            }
        };
        visit(geometry.coordinates);
    };
    (geojson.features || []).forEach(feature => visitGeometry(feature.geometry));
    return points;
}

function transformGeoJsonGeometry(geometry, transform) {
    if (!geometry) {
        return geometry;
    }
    if (geometry.type === "GeometryCollection") {
        return {
            ...geometry,
            geometries: (geometry.geometries || []).map(item => transformGeoJsonGeometry(item, transform))
        };
    }
    const visit = coordinates => {
        if (Array.isArray(coordinates)
            && coordinates.length >= 2
            && typeof coordinates[0] === "number"
            && typeof coordinates[1] === "number") {
            return transform(coordinates);
        }
        return Array.isArray(coordinates) ? coordinates.map(visit) : coordinates;
    };
    return { ...geometry, coordinates: visit(geometry.coordinates) };
}

function webMercatorToWgs84(coordinate) {
    const longitude = coordinate[0] * 180 / 20037508.34;
    const latitudeRadians = Math.PI / 2 - 2 * Math.atan(Math.exp(-coordinate[1] / 6378137));
    return [longitude, latitudeRadians * 180 / Math.PI, ...coordinate.slice(2)];
}

function normalizeKmlFiles(files) {
    const features = files.flatMap(file => kmlTextToGeoJson(file.text, file.name));
    if (!features.length) {
        throw new Error("KML senza geometrie utilizzabili");
    }

    const polygonParts = splitKmlPolygonFeatures(features);
    const parcels = filterKmlParcelFeatures(polygonParts);
    const parcelSet = new Set(parcels);
    const sheetParts = polygonParts.filter(feature => !parcelSet.has(feature));
    const nonPolygonFeatures = features.filter(feature => geometryPolygons(feature.geometry).length === 0);
    const optionalFeatures = [...sheetParts, ...nonPolygonFeatures];
    if (!parcels.length && !(lmeState.includeKmlSheetLayer && optionalFeatures.length)) {
        throw new Error("nessuna particella trovata; attiva 'includi layer del foglio' per importare gli altri elementi");
    }
    return {
        geojson: { type: "FeatureCollection", features: parcels },
        sheetGeojson: {
            type: "FeatureCollection",
            features: lmeState.includeKmlSheetLayer ? optionalFeatures : []
        },
        ignoredCount: lmeState.includeKmlSheetLayer ? 0 : optionalFeatures.length,
        reprojected: false
    };
}

function kmlTextToGeoJson(text, sourceName) {
    const xml = new DOMParser().parseFromString(text, "text/xml");
    if (xml.getElementsByTagName("parsererror").length) {
        throw new Error(`KML non valido (${sourceName})`);
    }
    const tree = toGeoJSON.kmlWithFolders(xml, { skipNullGeometry: true });
    const features = [];
    const visit = (node, folders) => {
        if (node?.type === "Feature") {
            const sourceProperties = node.properties || {};
            node.properties = {
                ...sourceProperties,
                _lmeColor: sourceProperties._lmeColor || sourceProperties.stroke,
                _lmeFillColor: sourceProperties._lmeFillColor || sourceProperties.fill,
                _lmeWeight: sourceProperties._lmeWeight || sourceProperties["stroke-width"],
                _lmeOpacity: sourceProperties._lmeOpacity || sourceProperties["stroke-opacity"],
                _lmeFillOpacity: sourceProperties._lmeFillOpacity || sourceProperties["fill-opacity"],
                _lmeFolder: folders.filter(Boolean).join(" / "),
                _lmeSource: sourceName
            };
            features.push(node);
            return;
        }
        const nextFolders = node?.type === "folder"
            ? [...folders, node.meta?.name || ""]
            : folders;
        (node?.children || []).forEach(child => visit(child, nextFolders));
    };
    visit(tree, []);
    return features;
}

function filterKmlParcelFeatures(features) {
    const filtered = features.filter(feature => {
        if (isSheetOrOverlayFeature(feature)) {
            return false;
        }
        const properties = feature.properties || {};
        const name = String(properties.name || properties.Name || properties.LABEL || "").trim();
        const identity = [name, properties.layer, properties.Layer, properties.type, properties.Tipo]
            .filter(Boolean)
            .join(" ")
            .toLowerCase();
        const folder = String(properties._lmeFolder || "").toLowerCase();
        const context = `${identity} ${folder}`;
        const hasParcelNumber = /^[a-z]?\s*\d+[a-z]?(?:[\/. -]\d+[a-z]?)?$/i.test(name);
        const isSheet = /\bfoglio\b|\bsheet\b|quadro[ _-]?d[' ]?unione|(?:perimetro|bordo|limite|contorno)[ _-]?(?:del[ _-]?)?foglio|sheet[ _-]?boundary/.test(context);
        return !isSheet || hasParcelNumber;
    });
    return removeLikelySheetOutlines(filtered);
}

function isSheetOrOverlayFeature(feature) {
    const properties = feature?.properties || {};
    const geometryType = String(properties["@geometry-type"] || "").toLowerCase();
    const name = String(properties.name || properties.Name || properties.LABEL || "").trim();
    const context = [
        name,
        properties.layer,
        properties.Layer,
        properties.type,
        properties.Tipo,
        properties._lmeFolder
    ].filter(Boolean).join(" ").toLowerCase();

    if (geometryType === "groundoverlay" || /^doc[_ -]?\d+$/i.test(name)) {
        return true;
    }

    const hasParcelNumber = /^[a-z]?\s*\d+[a-z]?(?:[\/. -]\d+[a-z]?)?$/i.test(name);
    return !hasParcelNumber
        && /\bfoglio\b|\bsheet\b|quadro[ _-]?d[' ]?unione|(?:perimetro|bordo|limite|contorno)[ _-]?(?:del[ _-]?)?foglio|sheet[ _-]?boundary/.test(context);
}

function splitKmlPolygonFeatures(features) {
    const result = [];
    const addGeometry = (feature, geometry, partIndex) => {
        if (!geometry) {
            return;
        }
        if (geometry.type === "Polygon") {
            result.push({
                ...feature,
                properties: { ...(feature.properties || {}), _lmePart: partIndex },
                geometry
            });
            return;
        }
        if (geometry.type === "MultiPolygon") {
            (geometry.coordinates || []).forEach((coordinates, index) => addGeometry(
                feature,
                { type: "Polygon", coordinates },
                `${partIndex}.${index}`));
            return;
        }
        if (geometry.type === "GeometryCollection") {
            (geometry.geometries || []).forEach((item, index) => addGeometry(feature, item, `${partIndex}.${index}`));
        }
    };
    features.forEach((feature, index) => addGeometry(feature, feature.geometry, index));
    return result;
}

function removeLikelySheetOutlines(features) {
    let remaining = [...features];
    while (remaining.length >= 2) {
        const candidates = remaining
            .map(feature => ({ feature, bounds: geoJsonBounds(feature.geometry) }))
            .filter(item => item.bounds);
        if (candidates.length < 2) {
            break;
        }

        const largest = candidates.reduce((current, item) =>
            boundsArea(item.bounds) > boundsArea(current.bounds) ? item : current);
        if (isStrongParcelFeature(largest.feature)) {
            break;
        }
        const others = candidates.filter(item => item !== largest);
        const comparisonAreas = others.map(item => boundsArea(item.bounds)).sort((a, b) => a - b);
        const referenceArea = comparisonAreas[Math.floor(comparisonAreas.length / 2)];
        const contained = others.filter(item => boundsContains(largest.bounds, boundsCenter(item.bounds))).length;
        const minimumContained = candidates.length === 2 ? 1 : Math.ceil(others.length * 0.6);
        const areaFactor = 2.5;
        const looksLikeSheet = referenceArea > 0
            && boundsArea(largest.bounds) > referenceArea * areaFactor
            && contained >= minimumContained;
        if (!looksLikeSheet) {
            break;
        }
        remaining = remaining.filter(feature => feature !== largest.feature);
    }
    return remaining;
}

function isStrongParcelFeature(feature) {
    const properties = feature?.properties || {};
    const name = String(properties.name || properties.Name || properties.LABEL || "").trim();
    const context = [name, properties.layer, properties.Layer, properties.type, properties.Tipo, properties._lmeFolder]
        .filter(Boolean)
        .join(" ");
    return /particell|mappal|parcel/i.test(context)
        || /^[a-z]?\s*\d+[a-z]?(?:[\/. -]\d+[a-z]?)?$/i.test(name);
}

function geoJsonBounds(geometry) {
    const wrapper = { features: [{ geometry }] };
    const points = collectGeoJsonCoordinates(wrapper);
    if (!points.length) {
        return null;
    }
    return points.reduce((bounds, point) => ({
        west: Math.min(bounds.west, point[0]),
        south: Math.min(bounds.south, point[1]),
        east: Math.max(bounds.east, point[0]),
        north: Math.max(bounds.north, point[1])
    }), { west: Infinity, south: Infinity, east: -Infinity, north: -Infinity });
}

function boundsArea(bounds) {
    return Math.max(0, bounds.east - bounds.west) * Math.max(0, bounds.north - bounds.south);
}

function boundsCenter(bounds) {
    return [(bounds.west + bounds.east) / 2, (bounds.south + bounds.north) / 2];
}

function boundsContains(bounds, point) {
    return point[0] >= bounds.west && point[0] <= bounds.east
        && point[1] >= bounds.south && point[1] <= bounds.north;
}

function setIncludeKmlSheetLayer(enabled) {
    lmeState.includeKmlSheetLayer = Boolean(enabled);
    setInfo(lmeState.includeKmlSheetLayer
        ? "Importazione KML/KMZ: verranno inclusi anche foglio e altri elementi."
        : "Importazione KML/KMZ: verranno caricate solo le particelle riconosciute.");
}

function setImportedLayerVisible(enabled) {
    lmeState.importedVisible = Boolean(enabled);
    if (!lmeState.map || !lmeState.imported) {
        return;
    }

    if (lmeState.importedVisible) {
        if (!lmeState.map.hasLayer(lmeState.imported)) {
            lmeState.imported.addTo(lmeState.map);
        }
        lmeState.imported.bringToFront();
        const count = lmeState.imported.toGeoJSON().features?.length || 0;
        setInfo(count
            ? `${count} particelle o geometrie importate visibili.`
            : "Nessun dato importato da mostrare.");
        return;
    }

    if (lmeState.map.hasLayer(lmeState.imported)) {
        lmeState.map.removeLayer(lmeState.imported);
    }
    setInfo("Dati importati nascosti; restano disponibili nel file o progetto.");
}

function managedLayerPanes() {
    return {
        gpsPosition: "gpsPositionPane",
        drawings: "drawingsPane",
        gpsTrail: "gpsTrailPane",
        gpsParcels: "gpsParcelsPane",
        selectedParcels: "selectedParcelsPane",
        importedSheets: "importedSheetPane",
        imported: "importedPane",
        cadastre: "cadastrePane"
    };
}

function setLayerOrder(order) {
    const panes = managedLayerPanes();
    const requested = Array.isArray(order) ? order.filter(key => panes[key]) : [];
    const normalized = [...new Set([...requested, ...Object.keys(panes)])];
    lmeState.layerOrder = normalized;
    if (!lmeState.map) {
        return;
    }
    normalized.forEach((key, index) => {
        const pane = lmeState.map.getPane(panes[key]);
        if (pane) {
            pane.style.zIndex = String(590 - index * 20);
        }
    });
    try {
        localStorage.setItem("lmeMapLayerOrder", JSON.stringify(normalized));
    } catch {
    }
}

function restoreLayerOrder() {
    try {
        const saved = JSON.parse(localStorage.getItem("lmeMapLayerOrder") || "null");
        if (Array.isArray(saved)) {
            lmeState.layerOrder = saved;
        }
    } catch {
    }
}

function saveLayerManagerState() {
    // Object order and visibility are serialized in the project snapshot.
}

function applyStoredLayerManagerVisibility() {
    layerManagerCategories().forEach(category => {
        if (lmeState.managerHiddenCategories.has(category.key)) {
            category.roots.forEach(layer => {
                if (layer && lmeState.map.hasLayer(layer)) {
                    lmeState.map.removeLayer(layer);
                }
            });
        }
        managedRecordsForCategory(category).forEach(record => {
            if (lmeState.managerHiddenObjectIds.has(record.id)
                && !lmeState.managerHiddenObjects.has(record.id)) {
                lmeState.managerHiddenObjects.set(record.id, record);
                record.parent.removeLayer(record.layer);
            }
        });
    });
}

function managedGeoJsonLabel(geojson, fallback) {
    const features = geojson?.features || [];
    const source = features.map(feature => feature?.properties?._lmeSource).find(Boolean);
    return `${source || fallback} (${features.length})`;
}

function drawingLayerLabel(layer, layerType) {
    const properties = layer?.feature?.properties || {};
    if (properties.name) {
        return `POI: ${properties.name}`;
    }
    const shape = layerType || properties._lmeShape || "disegno";
    const labels = {
        polygon: "Area",
        rectangle: "Rettangolo",
        polyline: "Linea",
        circle: "Cerchio",
        marker: "POI"
    };
    return labels[shape] || "Disegno";
}

function layerManagerCategories() {
    return [
        { key: "gpsPosition", label: "Posizione GPS", roots: [lmeState.gpsMarker, lmeState.gpsAccuracy].filter(Boolean) },
        { key: "drawings", label: "Disegni e POI", roots: [lmeState.drawings].filter(Boolean) },
        { key: "gpsTrail", label: "Traccia GPS", roots: [lmeState.gpsTrail].filter(Boolean) },
        { key: "gpsParcels", label: "Particella rilevata dal GPS", roots: [lmeState.gpsParcelLayer].filter(Boolean) },
        { key: "selectedParcels", label: "Particelle catastali evidenziate", roots: [lmeState.selectedParcelsLayer].filter(Boolean) },
        { key: "importedSheets", label: "Cornici e fogli importati", roots: [lmeState.importedSheets].filter(Boolean), blocks: true },
        { key: "imported", label: "Dati importati", roots: [lmeState.imported].filter(Boolean), blocks: true },
        { key: "cadastre", label: "Layer catastali AdE", roots: [lmeState.cadastre].filter(Boolean) }
    ];
}

function managedLayerId(layer, categoryKey) {
    const properties = layer?.feature?.properties;
    if (properties) {
        properties._lmeManagerId ||= `${categoryKey}-${L.stamp(layer)}`;
        return properties._lmeManagerId;
    }
    layer.lmeManagerId ||= `${categoryKey}-${L.stamp(layer)}`;
    return layer.lmeManagerId;
}

function collectManagedLeafLayers(layer, categoryKey, parent, records) {
    if (!layer) {
        return;
    }
    if (typeof layer.getLayers === "function") {
        const children = layer.getLayers();
        children.forEach(child => collectManagedLeafLayers(child, categoryKey, layer, records));
        return;
    }
    if (layer instanceof L.Polyline && !lineLatLngGroups(layer.getLatLngs()).some(line => line.length)) {
        return;
    }
    const id = managedLayerId(layer, categoryKey);
    records.push({
        id,
        categoryKey,
        layer,
        parent,
        source: String(layer?.feature?.properties?._lmeSource || "Progetto corrente")
    });
}

function managedRecordsForCategory(category) {
    const records = [];
    category.roots.forEach(root => collectManagedLeafLayers(root, category.key, lmeState.map, records));
    lmeState.managerHiddenObjects.forEach(record => {
        if (record.categoryKey === category.key && !records.some(item => item.id === record.id)) {
            records.push(record);
        }
    });
    return records;
}

function managedObjectLabel(record, index) {
    const layer = record.layer;
    const properties = layer?.feature?.properties || {};
    const reference = properties.NATIONALCADASTRALREFERENCE
        || properties.INSPIREID_LOCALID
        || properties.LABEL
        || properties.name
        || properties.Name;
    if (reference) {
        return String(reference);
    }
    if (layer.lmeManagerLabel) {
        return layer.lmeManagerLabel;
    }
    if (layer instanceof L.Circle) {
        return `Cerchio ${index + 1}`;
    }
    if (layer instanceof L.Polygon) {
        return `Area/particella ${index + 1}`;
    }
    if (layer instanceof L.Polyline) {
        return `Linea ${index + 1}`;
    }
    if (layer instanceof L.Marker) {
        return `POI ${index + 1}`;
    }
    return `Oggetto ${index + 1}`;
}

function managedObjectEditableName(record) {
    const properties = record?.layer?.feature?.properties || {};
    return properties.name || properties.Name || properties.label || properties.LABEL || "";
}

function managedObjectCanRename(record) {
    return ["drawings", "imported", "importedSheets"].includes(record.categoryKey)
        && record.layer?.feature?.properties;
}

function renameManagedObject(record, index) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    if (!managedObjectCanRename(record)) {
        return;
    }
    const currentName = String(managedObjectEditableName(record) || managedObjectLabel(record, index)).trim();
    const requestedName = window.prompt("Nuovo nome oggetto", currentName);
    if (requestedName === null) {
        return;
    }
    const name = requestedName.trim().slice(0, 120);
    if (!name) {
        setInfo("Nome non modificato: inserisci un testo.");
        return;
    }
    rememberMapChange();
    const properties = record.layer.feature.properties;
    properties.name = name;
    record.layer.lmeManagerLabel = record.categoryKey === "drawings" && record.layer instanceof L.Marker
        ? `POI: ${name}`
        : null;
    updateStoredFeaturePopup(record.layer);
    refreshImportedMeasurements();
    refreshDrawingMeasurements();
    refreshPermanentLabels();
    refreshLayerManager();
    finishMapChange();
    setInfo(`Oggetto rinominato: ${name}.`);
}

function managedCategoryName(category, records) {
    const storedName = lmeState.managerCategoryNames[category.key];
    const featureName = records
        .map(record => record.layer?.feature?.properties?._lmeCategoryName)
        .find(Boolean);
    const name = String(storedName || featureName || category.label).trim();
    if (name !== category.label) {
        lmeState.managerCategoryNames[category.key] = name;
    }
    return name;
}

function managedCategoryCanRename(category) {
    return ["drawings", "imported", "importedSheets"].includes(category.key);
}

function renameManagedCategory(category, records) {
    const currentName = managedCategoryName(category, records);
    const requestedName = window.prompt("Nuovo nome gruppo", currentName);
    if (requestedName === null) {
        return;
    }
    const name = requestedName.trim().slice(0, 120);
    if (!name) {
        setInfo("Nome non modificato: inserisci un testo.");
        return;
    }
    rememberMapChange();
    lmeState.managerCategoryNames[category.key] = name;
    records.forEach(record => {
        if (record.layer?.feature?.properties) {
            record.layer.feature.properties._lmeCategoryName = name;
        }
    });
    refreshLayerManager();
    finishMapChange();
    setInfo(`Gruppo rinominato: ${name}.`);
}

function managedBlockName(source, records) {
    return String(records
        .map(record => record.layer?.feature?.properties?._lmeGroupName)
        .find(Boolean) || source);
}

function renameManagedBlock(category, source, records) {
    const currentName = managedBlockName(source, records);
    const requestedName = window.prompt("Nuovo nome gruppo", currentName);
    if (requestedName === null) {
        return;
    }
    const name = requestedName.trim().slice(0, 120);
    if (!name) {
        setInfo("Nome non modificato: inserisci un testo.");
        return;
    }
    rememberMapChange();
    records.forEach(record => {
        if (record.layer?.feature?.properties) {
            record.layer.feature.properties._lmeGroupName = name;
        }
    });
    refreshLayerManager();
    finishMapChange();
    setInfo(`Gruppo rinominato: ${name}.`);
}

function managedCategoryCanRemove(category, records) {
    return records.length > 0
        && ["drawings", "imported", "importedSheets", "selectedParcels", "gpsParcels"].includes(category.key);
}

function managedObjectCanRemove(record) {
    return ["drawings", "imported", "importedSheets", "selectedParcels", "gpsParcels"].includes(record.categoryKey);
}

function layerManagerRowActions(renameButton, removeButton) {
    if (!renameButton && !removeButton) {
        return "";
    }
    return `<span class="layer-row-actions">${renameButton}${removeButton}</span>`;
}

const layerManagerPalettes = [
    { surface: "#f0fdf4", parent: "#dcfce7", border: "#86efac", accent: "#166534" },
    { surface: "#eff6ff", parent: "#dbeafe", border: "#93c5fd", accent: "#1d4ed8" },
    { surface: "#fffbeb", parent: "#fef3c7", border: "#fcd34d", accent: "#92400e" },
    { surface: "#fff1f2", parent: "#ffe4e6", border: "#fda4af", accent: "#be123c" },
    { surface: "#f5f3ff", parent: "#ede9fe", border: "#c4b5fd", accent: "#6d28d9" },
    { surface: "#ecfeff", parent: "#cffafe", border: "#67e8f9", accent: "#0e7490" },
    { surface: "#f7fee7", parent: "#ecfccb", border: "#bef264", accent: "#3f6212" }
];

function applyLayerManagerPalette(row, key) {
    const hash = [...String(key)].reduce((value, character) =>
        ((value * 31) + character.charCodeAt(0)) >>> 0, 0);
    const palette = layerManagerPalettes[hash % layerManagerPalettes.length];
    row.style.setProperty("--layer-group-surface", palette.surface);
    row.style.setProperty("--layer-group-parent", palette.parent);
    row.style.setProperty("--layer-group-border", palette.border);
    row.style.setProperty("--layer-group-accent", palette.accent);
}

function clearManagedObjectState(id) {
    lmeState.managerHiddenObjects.delete(id);
    lmeState.managerHiddenObjectIds.delete(id);
    lmeState.managerHiddenMeasurementSummaryIds.delete(id);
    lmeState.managerHiddenMeasurementSideIds.delete(id);
    Object.keys(lmeState.managerObjectOrder).forEach(categoryKey => {
        lmeState.managerObjectOrder[categoryKey] = lmeState.managerObjectOrder[categoryKey]
            .filter(objectId => objectId !== id);
    });
}

function removeManagedRecords(records, subject) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    if (!records.length) {
        return;
    }
    if (records.some(record => record.layer?.feature?.properties?._lmeLocked)) {
        setInfo("Operazione annullata: sblocca prima tutti gli oggetti coinvolti.");
        return;
    }
    const message = records.length === 1
        ? `Rimuovere ${subject} dal progetto? Non verra incluso nel prossimo salvataggio.`
        : `Rimuovere ${subject} e tutti i suoi ${records.length} oggetti dal progetto? Non verranno inclusi nel prossimo salvataggio.`;
    if (!window.confirm(message)) {
        return;
    }
    rememberMapChange();
    lmeState.trash.push({
        removedAt: new Date().toISOString(),
        subject,
        items: records.map(record => ({
            categoryKey: record.categoryKey,
            source: record.source,
            feature: record.layer.toGeoJSON()
        }))
    });
    if (lmeState.trash.length > 30) lmeState.trash.shift();
    const removedIds = new Set(records.map(record => record.id));
    const categoryKeys = new Set(records.map(record => record.categoryKey));
    records.forEach(record => {
        if (record.parent?.hasLayer?.(record.layer)) {
            record.parent.removeLayer(record.layer);
        }
        clearManagedObjectState(record.id);
    });
    categoryKeys.forEach(categoryKey => {
        const order = lmeState.managerObjectOrder[categoryKey] || [];
        lmeState.managerObjectOrder[categoryKey] = order.filter(id => !removedIds.has(id));
        const category = layerManagerCategories().find(item => item.key === categoryKey);
        if (category && managedRecordsForCategory(category).length === 0) {
            lmeState.managerRemovedCategories.add(categoryKey);
            delete lmeState.managerCategoryNames[categoryKey];
        }
    });
    clearManagerHighlight();
    refreshImportedMeasurements();
    refreshDrawingMeasurements();
    updateGpsInsideState();
    refreshLayerManager();
    finishMapChange(`Rimozione: ${subject}`);
    setInfo(`${records.length === 1 ? "Oggetto rimosso" : `${records.length} oggetti rimossi`} dal progetto.`);
}

function managedObjectDetails(layer) {
    const details = [];
    const properties = layer?.feature?.properties || {};
    if (properties.name || properties.Name) {
        details.push(`Nome: ${properties.name || properties.Name}`);
    }
    if (layer instanceof L.Circle) {
        const radius = layer.getRadius();
        details.push(`Raggio: ${formatDistance(radius)}`);
        details.push(`Superficie: ${formatArea(Math.PI * radius * radius)}`);
        details.push(`Circonferenza: ${formatDistance(2 * Math.PI * radius)}`);
    } else if (layer instanceof L.Polygon) {
        polygonLatLngGroups(layer.getLatLngs()).forEach((polygon, polygonIndex) => {
            const outer = polygon[0] || [];
            const area = polygon.reduce((sum, ring, ringIndex) => {
                const ringArea = Math.abs(L.GeometryUtil.geodesicArea(ring));
                return sum + (ringIndex === 0 ? ringArea : -ringArea);
            }, 0);
            details.push(`${polygonIndex ? `Area ${polygonIndex + 1}` : "Superficie"}: ${formatArea(Math.abs(area))}`);
            details.push(`${polygonIndex ? `Perimetro ${polygonIndex + 1}` : "Perimetro"}: ${formatDistance(latLngPathLength(outer, true))}`);
            outer.forEach((point, index) => {
                const next = outer[(index + 1) % outer.length];
                if (next && !point.equals(next)) {
                    details.push(`Lato ${index + 1}: ${formatDistance(lmeState.map.distance(point, next))}`);
                }
            });
        });
    } else if (layer instanceof L.Polyline) {
        const lines = lineLatLngGroups(layer.getLatLngs());
        details.push(`Lunghezza: ${formatDistance(lines.reduce((sum, line) => sum + latLngPathLength(line, false), 0))}`);
    } else if (typeof layer.getLatLng === "function") {
        const point = layer.getLatLng();
        details.push(`Coordinate: ${point.lat.toFixed(6)}, ${point.lng.toFixed(6)}`);
    }
    return details;
}

function refreshLayerManager() {
    const container = document.getElementById("layerManagerTree");
    if (!container || !lmeState.map) {
        return;
    }
    captureLayerManagerExpansion(container);
    const scrollHost = container.closest(".map-layer-panel");
    const scrollTop = scrollHost?.scrollTop || 0;
    applyStoredLayerManagerVisibility();
    container.innerHTML = "";
    lmeState.managerRecords = new Map();
    container.appendChild(renderLayerSelectionToolbar());
    const categoriesByKey = new Map(layerManagerCategories().map(category => [category.key, category]));
    lmeState.layerOrder.forEach(categoryKey => {
        const category = categoriesByKey.get(categoryKey);
        if (!category) {
            return;
        }
        const records = managedRecordsForCategory(category);
        if (records.length) {
            lmeState.managerRemovedCategories.delete(category.key);
        } else if (lmeState.managerRemovedCategories.has(category.key)) {
            return;
        }
        const savedOrder = lmeState.managerObjectOrder[category.key] || [];
        const positions = new Map(savedOrder.map((id, index) => [id, index]));
        records.sort((left, right) =>
            (positions.get(left.id) ?? Number.MAX_SAFE_INTEGER) - (positions.get(right.id) ?? Number.MAX_SAFE_INTEGER));
        records.forEach(record => lmeState.managerRecords.set(record.id, record));
        const rendered = renderLayerManagerCategory(category, records);
        const search = lmeState.managerSearchText.trim().toLocaleLowerCase("it");
        if (search && !records.some((record, index) => `${managedObjectLabel(record, index)} ${record.source}`.toLocaleLowerCase("it").includes(search))
            && !managedCategoryName(category, records).toLocaleLowerCase("it").includes(search)) {
            rendered.hidden = true;
        }
        container.appendChild(rendered);
    });
    applyManagedVisualOrder(container);
    bindLayerManagerDrag(container);
    bindLayerManagerMoveButtons(container);
    if (scrollHost) {
        scrollHost.scrollTop = scrollTop;
        window.requestAnimationFrame(() => {
            scrollHost.scrollTop = scrollTop;
        });
    }
}

function renderLayerManagerCategory(category, records) {
    const group = document.createElement("details");
    group.className = "layer-manager-group";
    group.dataset.dragType = "category";
    group.dataset.layerDepth = "0";
    group.dataset.categoryKey = category.key;
    applyLayerManagerPalette(group, `category:${category.key}`);
    bindLayerManagerExpansion(group, `category:${category.key}`);
    const categoryName = managedCategoryName(category, records);
    const renameButton = managedCategoryCanRename(category)
        ? `<button type="button" class="layer-rename-button" aria-label="Rinomina gruppo" title="Rinomina">Rinomina</button>`
        : "";
    const removeButton = managedCategoryCanRemove(category, records)
        ? `<button type="button" class="layer-remove-button" aria-label="Rimuovi gruppo dal progetto" title="Rimuovi dal progetto">Rimuovi</button>`
        : "";
    const rowActions = layerManagerRowActions(renameButton, removeButton);
    group.classList.toggle("layer-manager-with-actions", Boolean(rowActions));
    const visibleCount = records.filter(record => !lmeState.managerHiddenObjectIds.has(record.id)).length;
    const categoryVisible = !lmeState.managerHiddenCategories.has(category.key)
        && (!category.roots.length || category.roots.some(layer => lmeState.map.hasLayer(layer)));
    const visible = categoryVisible;
    const categoryLocked = records.length > 0 && records.every(record => Boolean(record.layer?.feature?.properties?._lmeLocked));
    group.innerHTML = `<summary><button type="button" class="layer-drag-handle" aria-label="Trascina gruppo">☰</button><input type="checkbox" ${visible ? "checked" : ""} aria-label="Mostra ${escapeHtml(categoryName)}"><span class="layer-manager-title">${escapeHtml(categoryName)}</span><button type="button" class="layer-inline-lock ${categoryLocked ? "is-locked" : ""}" aria-label="${categoryLocked ? "Sblocca" : "Blocca"} gruppo" title="${categoryLocked ? "Sblocca" : "Blocca"}">${categoryLocked ? "🔒" : "🔓"}</button>${rowActions}${layerManagerMoveButtons("gruppo")}<span class="layer-manager-count">${records.length}</span></summary><div class="layer-manager-children"></div>`;
    const checkbox = group.querySelector("input");
    checkbox.indeterminate = categoryVisible && records.length > 0 && visibleCount < records.length;
    checkbox.addEventListener("click", event => event.stopPropagation());
    checkbox.addEventListener("change", () => setManagedCategoryVisible(category, checkbox.checked));
    group.querySelector(".layer-inline-lock")?.addEventListener("click", event => {
        event.preventDefault(); event.stopPropagation();
        updateManagedProperties(records, properties => { properties._lmeLocked = !categoryLocked; });
    });
    group.querySelector(".layer-rename-button")?.addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        renameManagedCategory(category, records);
    });
    group.querySelector(".layer-remove-button")?.addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        removeManagedRecords(records, `il gruppo '${categoryName}'`);
    });
    bindManagedParentHighlight(group, `category:${category.key}`, records);
    const children = group.querySelector(".layer-manager-children");
    if (records.length) children.appendChild(renderManagedGroupTools(records));
    if (category.blocks) {
        const blocks = new Map();
        records.forEach(record => {
            const list = blocks.get(record.source) || [];
            list.push(record);
            blocks.set(record.source, list);
        });
        blocks.forEach((blockRecords, source) => children.appendChild(renderLayerManagerBlock(category, source, blockRecords)));
    } else {
        records.forEach((record, index) => children.appendChild(renderLayerManagerObject(record, index)));
    }
    return group;
}

function renderLayerManagerBlock(category, source, records) {
    const block = document.createElement("details");
    block.className = "layer-manager-block";
    block.dataset.dragType = "block";
    block.dataset.layerDepth = "1";
    block.dataset.categoryKey = category.key;
    block.dataset.blockKey = source;
    applyLayerManagerPalette(block, `block:${category.key}:${source}`);
    bindLayerManagerExpansion(block, `block:${category.key}:${source}`);
    const visibleCount = records.filter(record => !lmeState.managerHiddenObjectIds.has(record.id)).length;
    const visible = visibleCount === records.length;
    const blockName = managedBlockName(source, records);
    const rowActions = layerManagerRowActions(
        `<button type="button" class="layer-rename-button" aria-label="Rinomina gruppo" title="Rinomina">Rinomina</button>`,
        `<button type="button" class="layer-remove-button" aria-label="Rimuovi gruppo dal progetto" title="Rimuovi dal progetto">Rimuovi</button>`);
    block.classList.add("layer-manager-with-actions");
    const blockLocked = records.length > 0 && records.every(record => Boolean(record.layer?.feature?.properties?._lmeLocked));
    block.innerHTML = `<summary><button type="button" class="layer-drag-handle" aria-label="Trascina blocco">☰</button><input type="checkbox" ${visible ? "checked" : ""} aria-label="Mostra ${escapeHtml(blockName)}"><span class="layer-manager-title">${escapeHtml(blockName)}</span><button type="button" class="layer-inline-lock ${blockLocked ? "is-locked" : ""}" aria-label="${blockLocked ? "Sblocca" : "Blocca"} gruppo" title="${blockLocked ? "Sblocca" : "Blocca"}">${blockLocked ? "🔒" : "🔓"}</button>${rowActions}${layerManagerMoveButtons("blocco")}<span class="layer-manager-count">${records.length}</span></summary><div class="layer-manager-children"></div>`;
    const checkbox = block.querySelector("input");
    checkbox.indeterminate = visibleCount > 0 && !visible;
    checkbox.addEventListener("click", event => event.stopPropagation());
    checkbox.addEventListener("change", () => {
        records.forEach(record => setManagedObjectVisible(record, checkbox.checked, false));
        refreshLayerManager();
    });
    block.querySelector(".layer-inline-lock")?.addEventListener("click", event => {
        event.preventDefault(); event.stopPropagation();
        updateManagedProperties(records, properties => { properties._lmeLocked = !blockLocked; });
    });
    block.querySelector(".layer-rename-button").addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        renameManagedBlock(category, source, records);
    });
    block.querySelector(".layer-remove-button").addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        removeManagedRecords(records, `il gruppo '${blockName}'`);
    });
    bindManagedParentHighlight(block, `block:${category.key}:${source}`, records);
    const children = block.querySelector(".layer-manager-children");
    children.appendChild(renderManagedGroupTools(records));
    records.forEach((record, index) => children.appendChild(renderLayerManagerObject(record, index)));
    return block;
}

function renderLayerManagerObject(record, index) {
    const object = document.createElement("details");
    object.className = "layer-manager-object";
    if (record.id === lmeState.managerHighlightedObjectId) {
        object.classList.add("layer-manager-object-selected");
    }
    object.dataset.dragType = "object";
    object.dataset.layerDepth = "2";
    object.dataset.objectId = record.id;
    bindLayerManagerExpansion(object, `object:${record.id}`);
    const visible = !lmeState.managerHiddenObjectIds.has(record.id);
    const renameButton = managedObjectCanRename(record)
        ? `<button type="button" class="layer-rename-button" aria-label="Rinomina oggetto" title="Rinomina">Rinomina</button>`
        : "";
    const removeButton = managedObjectCanRemove(record)
        ? `<button type="button" class="layer-remove-button" aria-label="Rimuovi oggetto dal progetto" title="Rimuovi dal progetto">Rimuovi</button>`
        : "";
    const rowActions = layerManagerRowActions(renameButton, removeButton);
    object.classList.toggle("layer-manager-with-actions", Boolean(rowActions));
    const objectName = managedObjectLabel(record, index);
    const locked = Boolean(record.layer?.feature?.properties?._lmeLocked);
    object.innerHTML = `<summary><button type="button" class="layer-drag-handle" aria-label="Trascina oggetto">☰</button><input type="checkbox" ${visible ? "checked" : ""} aria-label="Mostra oggetto"><span class="layer-manager-title">${escapeHtml(objectName)}</span><button type="button" class="layer-inline-lock ${locked ? "is-locked" : ""}" aria-label="${locked ? "Sblocca" : "Blocca"} oggetto" title="${locked ? "Sblocca" : "Blocca"}">${locked ? "🔒" : "🔓"}</button>${rowActions}${layerManagerMoveButtons("oggetto")}<span class="layer-manager-count">›</span></summary><div class="layer-manager-details"></div>`;
    const checkbox = object.querySelector("input");
    checkbox.addEventListener("click", event => event.stopPropagation());
    checkbox.addEventListener("change", () => setManagedObjectVisible(record, checkbox.checked, true));
    object.querySelector(".layer-rename-button")?.addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        renameManagedObject(record, index);
    });
    object.querySelector(".layer-remove-button")?.addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        removeManagedRecords([record], `'${objectName}'`);
    });
    object.querySelector(".layer-inline-lock")?.addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        updateManagedProperties([record], value => { value._lmeLocked = !locked; });
    });
    object.querySelector(".layer-manager-title").addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        object.open = true;
        highlightManagedObject(record);
    });
    const details = object.querySelector(".layer-manager-details");
    details.appendChild(renderLayerManagerVisibilityOption(
        geometryVisibilityLabel(record.layer),
        visible,
        checked => setManagedObjectVisible(record, checked, true)));
    if (supportsManagedMeasurements(record)) {
        managedMeasurementKinds(record).forEach(kind => {
            const measurementsVisible = managedMeasurementsGloballyVisible(record.categoryKey)
                && !managedMeasurementHiddenSet(kind.key).has(record.id);
            details.appendChild(renderLayerManagerVisibilityOption(
                kind.label,
                measurementsVisible,
                checked => setManagedMeasurementKindVisible(record, kind.key, checked)));
        });
    }
    const rows = managedObjectDetails(record.layer);
    const info = document.createElement("div");
    info.className = "layer-manager-info";
    info.innerHTML = rows.length
        ? rows.map(value => `<span>${escapeHtml(value)}</span>`).join("")
        : "<span>Nessuna misura disponibile</span>";
    details.appendChild(info);
    details.appendChild(renderManagedObjectTools(record));
    return object;
}

function renderLayerSelectionToolbar() {
    const selectedCount = lmeState.managerSelectedObjectIds.size;
    const toolbar = document.createElement("section");
    toolbar.className = "layer-selection-toolbar";
    toolbar.innerHTML = `<label>Cerca oggetti<input type="search" value="${escapeHtml(lmeState.managerSearchText)}" placeholder="Nome o gruppo"></label>
        <div class="layer-selection-summary"><strong>${selectedCount} selezionati</strong><button type="button" data-action="clear">Deseleziona</button></div>
        <div class="layer-batch-actions">
            <button type="button" data-action="duplicate">Duplica</button><button type="button" data-action="move">Sposta</button>
            <button type="button" data-action="buffer">Buffer</button><button type="button" data-action="union">Unisci</button>
            <button type="button" data-action="split">Dividi</button><button type="button" data-action="delete" class="danger-command">Rimuovi</button>
        </div>`;
    const search = toolbar.querySelector("input");
    search.addEventListener("input", () => {
        lmeState.managerSearchText = search.value;
        refreshLayerManager();
        requestAnimationFrame(() => document.querySelector(".layer-selection-toolbar input")?.focus());
    });
    toolbar.querySelectorAll("button").forEach(button => button.addEventListener("click", () => {
        const records = [...lmeState.managerSelectedObjectIds]
            .map(id => lmeState.managerRecords?.get(id)).filter(Boolean);
        if (button.dataset.action === "clear") {
            lmeState.managerSelectedObjectIds.clear();
            refreshLayerManager();
        } else if (!records.length) {
            setInfo("Seleziona almeno un oggetto dalle sue opzioni.");
        } else if (button.dataset.action === "duplicate") duplicateManagedRecords(records);
        else if (button.dataset.action === "move") moveManagedRecords(records);
        else if (button.dataset.action === "buffer") bufferManagedRecords(records);
        else if (button.dataset.action === "union") unionManagedRecords(records);
        else if (button.dataset.action === "split") splitManagedRecords(records);
        else if (button.dataset.action === "delete") removeManagedRecords(records, "gli oggetti selezionati");
    }));
    return toolbar;
}

function renderManagedGroupTools(records) {
    const tools = document.createElement("div");
    tools.className = "layer-group-tools";
    const properties = records[0]?.layer?.feature?.properties || {};
    tools.innerHTML = `<strong>Azioni gruppo</strong><span class="layer-group-totals">${escapeHtml(managedGroupTotals(records))}</span><div class="layer-style-controls">
        <label>Colore<input type="color" value="${normalizedColor(properties._lmeColor, "#16806a")}"></label>
        <label>Spessore<input type="range" min="1" max="10" step="1" value="${Number(properties._lmeWeight) || 3}"></label>
        <label>Opacita<input type="range" min="0.1" max="1" step="0.1" value="${Number(properties._lmeOpacity) || 1}"></label></div>
        <div class="layer-compact-actions"><button type="button" data-group-action="select">Seleziona tutti</button><button type="button" data-group-action="lock">Blocca/sblocca</button><button type="button" data-group-action="labels">Etichette</button></div>`;
    const inputs = tools.querySelectorAll("input");
    inputs.forEach(input => input.addEventListener("change", () => {
        applyManagedStyle(records, { color: inputs[0].value, weight: Number(inputs[1].value), opacity: Number(inputs[2].value) });
    }));
    tools.querySelector("[data-group-action='select']").addEventListener("click", () => {
        records.forEach(record => lmeState.managerSelectedObjectIds.add(record.id)); refreshLayerManager();
    });
    tools.querySelector("[data-group-action='lock']").addEventListener("click", () => {
        const lock = !records.every(record => Boolean(record.layer?.feature?.properties?._lmeLocked));
        updateManagedProperties(records, properties => { properties._lmeLocked = lock; });
        setInfo(lock ? "Gruppo bloccato." : "Gruppo sbloccato.");
    });
    tools.querySelector("[data-group-action='labels']").addEventListener("click", () => {
        const visible = !records.every(record => Boolean(record.layer?.feature?.properties?._lmeLabelVisible));
        updateManagedProperties(records, properties => { properties._lmeLabelVisible = visible; });
    });
    return tools;
}

function managedGroupTotals(records) {
    let length = 0; let area = 0;
    records.forEach(record => {
        const layer = record.layer;
        if (layer instanceof L.Circle) { area += Math.PI * layer.getRadius() ** 2; length += 2 * Math.PI * layer.getRadius(); }
        else if (layer instanceof L.Polygon) polygonLatLngGroups(layer.getLatLngs()).forEach(polygon => {
            area += Math.abs(polygon.reduce((sum, ring, index) => sum + (index ? -1 : 1) * Math.abs(L.GeometryUtil.geodesicArea(ring)), 0));
            length += latLngPathLength(polygon[0] || [], true);
        });
        else if (layer instanceof L.Polyline) length += lineLatLngGroups(layer.getLatLngs()).reduce((sum, line) => sum + latLngPathLength(line, false), 0);
    });
    const values = []; if (area) values.push(`Area ${formatArea(area)}`); if (length) values.push(`Sviluppo ${formatDistance(length)}`);
    return values.join(" | ") || `${records.length} oggetti`;
}

function renderManagedObjectTools(record) {
    const properties = record.layer.feature?.properties || (record.layer.feature = { type: "Feature", properties: {} }).properties;
    const selected = lmeState.managerSelectedObjectIds.has(record.id);
    const locked = Boolean(properties._lmeLocked);
    const tools = document.createElement("section");
    tools.className = "layer-object-tools";
    tools.innerHTML = `<label class="layer-manager-suboption"><input type="checkbox" data-field="selected" ${selected ? "checked" : ""}><span>Seleziona per azioni multiple</span></label>
        <label class="layer-manager-suboption"><input type="checkbox" data-field="locked" ${locked ? "checked" : ""}><span>Blocca modifiche e rimozione</span></label>
        <label class="layer-manager-suboption"><input type="checkbox" data-field="label" ${properties._lmeLabelVisible ? "checked" : ""}><span>Etichetta permanente sulla mappa</span></label>
        <div class="layer-style-controls"><label>Linea<input type="color" data-field="color" value="${normalizedColor(properties._lmeColor, "#f97316")}"></label>
        <label>Riempimento<input type="color" data-field="fillColor" value="${normalizedColor(properties._lmeFillColor, "#fb923c")}"></label>
        <label>Spessore<input type="range" data-field="weight" min="1" max="10" step="1" value="${Number(properties._lmeWeight) || 3}"></label>
        <label>Opacita<input type="range" data-field="opacity" min="0.1" max="1" step="0.1" value="${Number(properties._lmeOpacity) || 1}"></label>
        <label>Riempimento %<input type="range" data-field="fillOpacity" min="0" max="0.8" step="0.05" value="${Number.isFinite(Number(properties._lmeFillOpacity)) ? Number(properties._lmeFillOpacity) : 0.2}"></label>
        <label>Tratto<select data-field="dash"><option value="">Continuo</option><option value="8 6" ${properties._lmeDash === "8 6" ? "selected" : ""}>Tratteggiato</option><option value="2 6" ${properties._lmeDash === "2 6" ? "selected" : ""}>Puntinato</option></select></label></div>
        <label>Note<textarea data-field="notes" rows="2" maxlength="1000" placeholder="Note tecniche">${escapeHtml(properties._lmeNotes || "")}</textarea></label>
        <label class="layer-photo-picker">Foto<input type="file" data-field="photo" accept="image/*"></label>
        ${properties._lmePhoto ? `<img class="layer-photo-preview" src="${properties._lmePhoto}" alt="Foto allegata"><button type="button" data-action="remove-photo">Rimuovi foto</button>` : ""}
        <div class="layer-compact-actions"><button type="button" data-action="attributes">Attributi</button><button type="button" data-action="duplicate">Duplica</button><button type="button" data-action="numeric">Coordinate</button><button type="button" data-action="inspect">WGS84 / UTM</button><button type="button" data-action="move">Sposta</button><button type="button" data-action="buffer">Buffer</button></div>`;
    tools.querySelector("[data-field='selected']").addEventListener("change", event => {
        if (event.target.checked) lmeState.managerSelectedObjectIds.add(record.id);
        else lmeState.managerSelectedObjectIds.delete(record.id);
        refreshLayerManager();
    });
    tools.querySelector("[data-field='locked']").addEventListener("change", event => updateManagedProperties([record], value => { value._lmeLocked = event.target.checked; }));
    tools.querySelector("[data-field='label']").addEventListener("change", event => updateManagedProperties([record], value => { value._lmeLabelVisible = event.target.checked; }));
    tools.querySelectorAll(".layer-style-controls input,.layer-style-controls select").forEach(input => input.addEventListener("change", () => applyManagedStyle([record], {
        color: tools.querySelector("[data-field='color']").value,
        fillColor: tools.querySelector("[data-field='fillColor']").value,
        weight: Number(tools.querySelector("[data-field='weight']").value),
        opacity: Number(tools.querySelector("[data-field='opacity']").value),
        fillOpacity: Number(tools.querySelector("[data-field='fillOpacity']").value),
        dash: tools.querySelector("[data-field='dash']").value
    })));
    tools.querySelector("[data-field='notes']").addEventListener("change", event => updateManagedProperties([record], value => { value._lmeNotes = event.target.value.trim(); }));
    tools.querySelector("[data-field='photo']").addEventListener("change", async event => {
        const file = event.target.files?.[0]; if (!file) return;
        if (file.size > 2_500_000) { setInfo("Foto troppo grande: usa un file inferiore a 2,5 MB."); return; }
        const dataUrl = await fileToDataUrl(file);
        updateManagedProperties([record], value => { value._lmePhoto = dataUrl; });
    });
    tools.querySelector("[data-action='remove-photo']")?.addEventListener("click", () => updateManagedProperties([record], value => { delete value._lmePhoto; }));
    tools.querySelector("[data-action='attributes']").addEventListener("click", () => editManagedAttributes(record));
    tools.querySelector("[data-action='duplicate']").addEventListener("click", () => duplicateManagedRecords([record]));
    tools.querySelector("[data-action='numeric']").addEventListener("click", () => numericEditManagedRecord(record));
    tools.querySelector("[data-action='inspect']").addEventListener("click", () => showCoordinateInspectorForRecord(record));
    tools.querySelector("[data-action='move']").addEventListener("click", () => moveManagedRecords([record]));
    tools.querySelector("[data-action='buffer']").addEventListener("click", () => bufferManagedRecords([record]));
    return tools;
}

function normalizedColor(value, fallback) {
    return /^#[0-9a-f]{6}$/i.test(String(value || "")) ? value : fallback;
}

function editManagedAttributes(record) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    const properties = record.layer?.feature?.properties || {};
    const reserved = new Set(["name", "Name", "label", "LABEL"]);
    const current = Object.entries(properties)
        .filter(([key, value]) => !key.startsWith("_lme") && !reserved.has(key) && ["string", "number", "boolean"].includes(typeof value))
        .map(([key, value]) => `${key}=${value}`).join("\n");
    const value = window.prompt("Attributi, uno per riga nel formato chiave=valore\nEsempi: foglio, particella, proprietario, qualita, data_rilievo, stato", current);
    if (value === null) return;
    const parsed = {};
    value.split(/\r?\n/).forEach(line => {
        const separator = line.indexOf("=");
        if (separator < 1) return;
        const key = line.slice(0, separator).trim().replace(/[^a-zA-Z0-9_ -]/g, "_").slice(0, 60);
        const raw = line.slice(separator + 1).trim().slice(0, 500);
        if (key) parsed[key] = raw;
    });
    updateManagedProperties([record], target => {
        Object.keys(target).filter(key => !key.startsWith("_lme") && !reserved.has(key)).forEach(key => delete target[key]);
        Object.assign(target, parsed);
    });
    finishMapChange("Aggiornamento attributi");
    setInfo(`${Object.keys(parsed).length} attributi aggiornati.`);
}

function utmFromLatLng(latitude, longitude) {
    const zone = Math.floor((longitude + 180) / 6) + 1;
    const central = (zone - 1) * 6 - 180 + 3;
    const a = 6378137; const eccSquared = 0.00669438; const k0 = 0.9996;
    const latRad = latitude * Math.PI / 180; const lonRad = longitude * Math.PI / 180; const lonOriginRad = central * Math.PI / 180;
    const eccPrimeSquared = eccSquared / (1 - eccSquared);
    const n = a / Math.sqrt(1 - eccSquared * Math.sin(latRad) ** 2);
    const t = Math.tan(latRad) ** 2; const c = eccPrimeSquared * Math.cos(latRad) ** 2;
    const aa = Math.cos(latRad) * (lonRad - lonOriginRad);
    const m = a * ((1 - eccSquared / 4 - 3 * eccSquared ** 2 / 64 - 5 * eccSquared ** 3 / 256) * latRad
        - (3 * eccSquared / 8 + 3 * eccSquared ** 2 / 32 + 45 * eccSquared ** 3 / 1024) * Math.sin(2 * latRad)
        + (15 * eccSquared ** 2 / 256 + 45 * eccSquared ** 3 / 1024) * Math.sin(4 * latRad)
        - (35 * eccSquared ** 3 / 3072) * Math.sin(6 * latRad));
    const easting = k0 * n * (aa + (1 - t + c) * aa ** 3 / 6 + (5 - 18 * t + t ** 2 + 72 * c - 58 * eccPrimeSquared) * aa ** 5 / 120) + 500000;
    let northing = k0 * (m + n * Math.tan(latRad) * (aa ** 2 / 2 + (5 - t + 9 * c + 4 * c ** 2) * aa ** 4 / 24
        + (61 - 58 * t + t ** 2 + 600 * c - 330 * eccPrimeSquared) * aa ** 6 / 720));
    if (latitude < 0) northing += 10000000;
    return { zone, band: latitude >= 0 ? "N" : "S", easting, northing };
}

function recordCenter(record) {
    if (typeof record?.layer?.getBounds === "function" && record.layer.getBounds().isValid()) return record.layer.getBounds().getCenter();
    return record?.layer?.getLatLng?.() || null;
}

function showCoordinateInspectorForRecord(record) {
    const point = recordCenter(record);
    if (!point) { setInfo("Coordinate non disponibili per questo oggetto."); return; }
    showCoordinateDialog(point, managedObjectEditableName(record) || "Oggetto selezionato");
}

function showCoordinateInspector() {
    const records = [...lmeState.managerSelectedObjectIds].map(id => lmeState.managerRecords?.get(id)).filter(Boolean);
    const highlighted = lmeState.managerRecords?.get(lmeState.managerHighlightedObjectId);
    const record = highlighted || records[0];
    const point = record ? recordCenter(record) : lmeState.map.getCenter();
    showCoordinateDialog(point, record ? managedObjectEditableName(record) || "Oggetto selezionato" : "Centro mappa");
}

function showCoordinateDialog(point, title) {
    const utm = utmFromLatLng(point.lat, point.lng);
    const text = `WGS84: ${point.lat.toFixed(7)}, ${point.lng.toFixed(7)}\nUTM ${utm.zone}${utm.band}: E ${utm.easting.toFixed(2)} m, N ${utm.northing.toFixed(2)} m`;
    showAppDialog(title, `<div class="coordinate-result"><strong>WGS84</strong><span>${point.lat.toFixed(7)}, ${point.lng.toFixed(7)}</span><strong>UTM zona ${utm.zone}${utm.band}</strong><span>E ${utm.easting.toFixed(2)} m<br>N ${utm.northing.toFixed(2)} m</span><button type="button" data-copy-coordinate>Copia coordinate</button></div>`);
    document.querySelector("[data-copy-coordinate]")?.addEventListener("click", async () => {
        await navigator.clipboard?.writeText(text);
        setInfo("Coordinate copiate.");
    });
}

function showAppDialog(title, bodyHtml) {
    document.getElementById("lmeAppDialog")?.remove();
    const overlay = document.createElement("div");
    overlay.id = "lmeAppDialog";
    overlay.className = "lme-app-dialog";
    overlay.innerHTML = `<section role="dialog" aria-modal="true"><header><strong>${escapeHtml(title)}</strong><button type="button" aria-label="Chiudi">×</button></header><div class="lme-app-dialog-body">${bodyHtml}</div></section>`;
    overlay.querySelector("header button").addEventListener("click", () => overlay.remove());
    overlay.addEventListener("click", event => { if (event.target === overlay) overlay.remove(); });
    document.querySelector(".map-app")?.appendChild(overlay);
    return overlay;
}

function showObjectTable() {
    const records = layerManagerCategories().flatMap(category => managedRecordsForCategory(category));
    const body = records.map((record, index) => {
        const properties = record.layer?.feature?.properties || {};
        const details = managedObjectDetails(record.layer);
        return `<tr data-object-id="${escapeHtml(record.id)}"><td><button type="button" data-locate="${escapeHtml(record.id)}">⌖</button></td><td>${escapeHtml(managedObjectLabel(record, index))}</td><td>${escapeHtml(record.categoryKey)}</td><td>${escapeHtml(properties.foglio || properties.FOGLIO || "")}</td><td>${escapeHtml(properties.particella || properties.PARTICELLA || properties.LABEL || "")}</td><td>${escapeHtml(details.slice(0, 2).join(" | "))}</td></tr>`;
    }).join("");
    const dialog = showAppDialog("Elenco oggetti e particelle", `<label class="object-table-search">Filtra<input type="search" placeholder="Nome, foglio, particella o gruppo"></label><div class="object-table-wrap"><table><thead><tr><th></th><th>Nome</th><th>Gruppo</th><th>Foglio</th><th>Particella</th><th>Misure</th></tr></thead><tbody>${body || "<tr><td colspan='6'>Nessun oggetto</td></tr>"}</tbody></table></div>`);
    const byId = new Map(records.map(record => [record.id, record]));
    dialog.querySelector("input").addEventListener("input", event => {
        const query = event.target.value.toLocaleLowerCase("it");
        dialog.querySelectorAll("tbody tr").forEach(row => { row.hidden = query && !row.textContent.toLocaleLowerCase("it").includes(query); });
    });
    dialog.querySelectorAll("[data-locate]").forEach(button => button.addEventListener("click", () => {
        const record = byId.get(button.dataset.locate); if (!record) return;
        dialog.remove(); highlightManagedObject(record);
    }));
    return records.length;
}

function showAuditLog() {
    const rows = [...lmeState.auditLog].reverse().map(item => `<tr><td>${escapeHtml(new Date(item.at).toLocaleString("it-IT"))}</td><td>${escapeHtml(item.action || "Modifica mappa")}</td></tr>`).join("");
    showAppDialog("Registro operazioni", `<div class="object-table-wrap"><table><thead><tr><th>Data e ora</th><th>Operazione</th></tr></thead><tbody>${rows || "<tr><td colspan='2'>Nessuna operazione registrata</td></tr>"}</tbody></table></div>`);
    return lmeState.auditLog.length;
}

function updateManagedProperties(records, change) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    rememberMapChange();
    records.forEach(record => {
        record.layer.feature ||= { type: "Feature", properties: {} };
        record.layer.feature.properties ||= {};
        change(record.layer.feature.properties);
        applyStyleFromProperties(record.layer);
        updateStoredFeaturePopup(record.layer);
    });
    refreshPermanentLabels();
    refreshLayerManager();
    finishMapChange();
}

function applyManagedStyle(records, style) {
    updateManagedProperties(records, properties => {
        properties._lmeColor = style.color;
        properties._lmeFillColor = style.fillColor || style.color;
        properties._lmeWeight = style.weight;
        properties._lmeOpacity = style.opacity;
        if (style.fillOpacity !== undefined) properties._lmeFillOpacity = style.fillOpacity;
        if (style.dash !== undefined) properties._lmeDash = style.dash;
    });
}

function applyStyleFromProperties(layer) {
    const properties = layer?.feature?.properties || {};
    if (typeof layer?.setStyle === "function") {
        layer.setStyle({
            color: properties._lmeColor || layer.options.color,
            fillColor: properties._lmeFillColor || layer.options.fillColor,
            weight: Number(properties._lmeWeight) || layer.options.weight,
            opacity: Number.isFinite(Number(properties._lmeOpacity)) ? Number(properties._lmeOpacity) : layer.options.opacity,
            fillOpacity: Number.isFinite(Number(properties._lmeFillOpacity)) ? Number(properties._lmeFillOpacity) : layer.options.fillOpacity,
            dashArray: properties._lmeDash || null
        });
    }
}

function refreshPermanentLabels() {
    lmeState.permanentLabels?.clearLayers();
    layerManagerCategories().forEach(category => managedRecordsForCategory(category).forEach((record, index) => {
        const properties = record.layer?.feature?.properties || {};
        if (!properties._lmeLabelVisible || lmeState.managerHiddenObjectIds.has(record.id)) return;
        const center = layerLabelPosition(record.layer); if (!center) return;
        L.marker(center, { pane: "tooltipPane", interactive: false, icon: L.divIcon({ className: "lme-permanent-label", html: `<span>${escapeHtml(managedObjectLabel(record, index))}</span>`, iconSize: null }) }).addTo(lmeState.permanentLabels);
    }));
}

function layerLabelPosition(layer) {
    if (typeof layer?.getBounds === "function" && layer.getBounds().isValid()) return layer.getBounds().getCenter();
    if (typeof layer?.getLatLng === "function") return layer.getLatLng();
    return null;
}

function fileToDataUrl(file) {
    return new Promise((resolve, reject) => { const reader = new FileReader(); reader.onload = () => resolve(reader.result); reader.onerror = reject; reader.readAsDataURL(file); });
}

function addDrawingFeature(feature, select = false) {
    let added = null;
    L.geoJSON(feature, {
        pane: "drawingsPane",
        style: storedFeatureStyle,
        pointToLayer: (item, latlng) => item?.properties?._lmeShape === "circle" && Number(item.properties._lmeRadius) > 0
            ? L.circle(latlng, { pane: "drawingsPane", renderer: lmeState.drawingsRenderer, radius: Number(item.properties._lmeRadius) })
            : L.marker(latlng, { pane: "drawingsPane", draggable: false }),
        onEachFeature: (item, layer) => {
            annotateDrawingLayer(layer, item?.properties?._lmeShape);
            applyStyleFromProperties(layer);
            updateStoredFeaturePopup(layer);
            lmeState.drawings.addLayer(layer);
            added = layer;
        }
    });
    if (select && added) selectDrawingLayer(added);
    return added;
}

function storedFeatureStyle(feature) {
    const properties = feature?.properties || {};
    return {
        renderer: lmeState.drawingsRenderer,
        color: properties._lmeColor || "#f97316",
        fillColor: properties._lmeFillColor || "#fb923c",
        weight: Number(properties._lmeWeight) || 3,
        opacity: Number.isFinite(Number(properties._lmeOpacity)) ? Number(properties._lmeOpacity) : 1,
        fillOpacity: Number.isFinite(Number(properties._lmeFillOpacity)) ? Number(properties._lmeFillOpacity) : 0.2,
        dashArray: properties._lmeDash || null
    };
}

function duplicateManagedRecords(records) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    if (records.some(record => record.layer?.feature?.properties?._lmeLocked)) { setInfo("Sblocca gli oggetti da duplicare."); return; }
    rememberMapChange();
    records.forEach((record, index) => {
        const feature = record.layer.toGeoJSON();
        feature.properties = { ...(feature.properties || {}), name: `${managedObjectLabel(record, index)} - copia`, _lmeManagerId: undefined };
        if (record.layer instanceof L.Circle) {
            const point = turf.transformTranslate(feature, 1.5, 45, { units: "meters" });
            point.properties._lmeShape = "circle";
            point.properties._lmeRadius = record.layer.getRadius();
            addDrawingFeature(point);
        } else {
            addDrawingFeature(turf.transformTranslate(feature, 1.5, 45, { units: "meters" }));
        }
    });
    refreshDrawingMeasurements(); refreshLayerManager(); finishMapChange();
    setInfo(`${records.length} ${records.length === 1 ? "oggetto duplicato" : "oggetti duplicati"}.`);
}

function moveManagedRecords(records) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    if (records.some(record => record.layer?.feature?.properties?._lmeLocked)) { setInfo("Sblocca gli oggetti da spostare."); return; }
    const north = Number(window.prompt("Spostamento verso nord in metri (negativo verso sud)", "0"));
    if (!Number.isFinite(north)) return;
    const east = Number(window.prompt("Spostamento verso est in metri (negativo verso ovest)", "0"));
    if (!Number.isFinite(east) || (!north && !east)) return;
    const distance = Math.hypot(north, east);
    const bearing = Math.atan2(east, north) * 180 / Math.PI;
    rememberMapChange();
    records.forEach(record => {
        const moved = turf.transformTranslate(record.layer.toGeoJSON(), distance, bearing, { units: "meters" });
        replaceManagedLayer(record, moved);
    });
    finishManagedGeometryChange(`Spostati ${records.length} oggetti.`);
}

function bufferManagedRecords(records) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    const meters = Number(window.prompt("Distanza buffer in metri", "5"));
    if (!Number.isFinite(meters) || meters <= 0) return;
    rememberMapChange();
    let count = 0;
    records.forEach((record, index) => {
        const buffered = turf.buffer(record.layer.toGeoJSON(), meters, { units: "meters" });
        if (!buffered) return;
        buffered.properties = { ...(record.layer.feature?.properties || {}), name: `Buffer ${meters} m - ${managedObjectLabel(record, index)}`, _lmeShape: "polygon", _lmeManagerId: undefined };
        addDrawingFeature(buffered); count++;
    });
    finishManagedGeometryChange(`Creati ${count} buffer da ${formatDistance(meters)}.`);
}

function unionManagedRecords(records) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    const polygons = records.filter(record => record.layer instanceof L.Polygon).map(record => record.layer.toGeoJSON());
    if (polygons.length < 2) { setInfo("Per unire seleziona almeno due aree o poligoni."); return; }
    try {
        const merged = turf.union(turf.featureCollection(polygons));
        if (!merged) throw new Error("le aree non producono un risultato");
        rememberMapChange();
        merged.properties = { ...(polygons[0].properties || {}), name: "Unione aree", _lmeShape: "polygon", _lmeManagerId: undefined };
        addDrawingFeature(merged, true);
        polygons.forEach((_feature, index) => removeRecordWithoutPrompt(records.filter(record => record.layer instanceof L.Polygon)[index]));
        lmeState.managerSelectedObjectIds.clear();
        finishManagedGeometryChange("Aree unite in un nuovo oggetto.");
    } catch (error) { setInfo(`Unione non riuscita: ${error.message}`); }
}

function splitManagedRecords(records) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    const polygonRecord = records.find(record => record.layer instanceof L.Polygon);
    const lineRecord = records.find(record => record.layer instanceof L.Polyline && !(record.layer instanceof L.Polygon));
    if (!polygonRecord || !lineRecord) { setInfo("Per dividere seleziona un poligono e una linea di taglio."); return; }
    try {
        const cutter = turf.buffer(lineRecord.layer.toGeoJSON(), 0.02, { units: "meters" });
        const split = turf.difference(turf.featureCollection([polygonRecord.layer.toGeoJSON(), cutter]));
        const parts = split ? turf.flatten(split).features : [];
        if (parts.length < 2) throw new Error("la linea deve attraversare completamente il poligono");
        rememberMapChange();
        parts.forEach((part, index) => {
            part.properties = { ...(polygonRecord.layer.feature?.properties || {}), name: `${managedObjectLabel(polygonRecord, 0)} - parte ${index + 1}`, _lmeManagerId: undefined };
            addDrawingFeature(part);
        });
        removeRecordWithoutPrompt(polygonRecord);
        lmeState.managerSelectedObjectIds.clear();
        finishManagedGeometryChange(`Poligono diviso in ${parts.length} parti.`);
    } catch (error) { setInfo(`Divisione non riuscita: ${error.message}`); }
}

function selectedManagedRecords() {
    const current = lmeState.managerRecords || new Map();
    return [...lmeState.managerSelectedObjectIds].map(id => current.get(id)).filter(Boolean);
}

function createHoleFromSelected() {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return false; }
    const polygons = selectedManagedRecords().filter(record => record.layer instanceof L.Polygon);
    if (polygons.length !== 2) { setInfo("Seleziona esattamente due poligoni: prima l'area esterna e poi l'area da escludere."); return false; }
    try {
        const ordered = [...polygons].sort((left, right) => turf.area(right.layer.toGeoJSON()) - turf.area(left.layer.toGeoJSON()));
        const outer = ordered[0].layer.toGeoJSON();
        const inner = ordered[1].layer.toGeoJSON();
        if (!turf.booleanWithin(inner, outer)) throw new Error("il poligono interno deve essere completamente contenuto nell'area esterna");
        const result = turf.difference(turf.featureCollection([outer, inner]));
        if (!result) throw new Error("nessun risultato geometrico");
        rememberMapChange();
        result.properties = { ...(outer.properties || {}), name: `${managedObjectLabel(ordered[0], 0)} con area esclusa`, _lmeManagerId: undefined };
        addDrawingFeature(result, true);
        ordered.forEach(removeRecordWithoutPrompt);
        lmeState.managerSelectedObjectIds.clear();
        finishManagedGeometryChange("Poligono con foro creato correttamente.");
        return true;
    } catch (error) { setInfo(`Creazione foro non riuscita: ${error.message}`); return false; }
}

function validateAndRepairSelected() {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return "Progetto in sola lettura"; }
    const records = selectedManagedRecords();
    if (!records.length) { setInfo("Seleziona gli oggetti da controllare."); return "Nessuna selezione"; }
    let valid = 0; let repaired = 0; let rejected = 0;
    rememberMapChange();
    records.forEach((record, index) => {
        try {
            let feature = turf.cleanCoords(record.layer.toGeoJSON(), { mutate: false });
            if (feature.geometry?.type === "Polygon" && typeof turf.booleanValid === "function" && !turf.booleanValid(feature)) {
                const parts = turf.unkinkPolygon(feature).features;
                if (!parts.length) throw new Error("geometria non riparabile");
                removeRecordWithoutPrompt(record);
                parts.forEach((part, partIndex) => {
                    part.properties = { ...(feature.properties || {}), name: `${managedObjectLabel(record, index)} - riparato ${partIndex + 1}`, _lmeManagerId: undefined };
                    addDrawingFeature(part);
                });
                repaired++;
            } else {
                if (JSON.stringify(feature.geometry) !== JSON.stringify(record.layer.toGeoJSON().geometry)) {
                    replaceManagedLayer(record, feature); repaired++;
                } else valid++;
            }
        } catch { rejected++; }
    });
    lmeState.managerSelectedObjectIds.clear();
    finishManagedGeometryChange(`Controllo geometrie: ${valid} valide, ${repaired} riparate, ${rejected} non riparabili.`);
    return `${valid} valide, ${repaired} riparate, ${rejected} non riparabili`;
}

function compareSelectedGeometries() {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return false; }
    const polygons = selectedManagedRecords().filter(record => record.layer instanceof L.Polygon);
    if (polygons.length !== 2) { setInfo("Seleziona esattamente due poligoni da confrontare."); return false; }
    try {
        const first = polygons[0].layer.toGeoJSON(); const second = polygons[1].layer.toGeoJSON();
        const onlyFirst = turf.difference(turf.featureCollection([first, second]));
        const onlySecond = turf.difference(turf.featureCollection([second, first]));
        const overlap = turf.intersect(turf.featureCollection([first, second]));
        rememberMapChange();
        const addResult = (feature, name, color) => {
            if (!feature) return;
            feature.properties = { name, _lmeColor: color, _lmeFillColor: color, _lmeFillOpacity: 0.38, _lmeManagerId: undefined };
            addDrawingFeature(feature);
        };
        addResult(onlyFirst, `Solo ${managedObjectLabel(polygons[0], 0)}`, "#ef4444");
        addResult(onlySecond, `Solo ${managedObjectLabel(polygons[1], 1)}`, "#3b82f6");
        addResult(overlap, "Sovrapposizione", "#16a34a");
        const firstArea = onlyFirst ? turf.area(onlyFirst) : 0; const secondArea = onlySecond ? turf.area(onlySecond) : 0;
        finishManagedGeometryChange(`Confronto creato: eccedenza ${formatArea(firstArea)}, mancanza ${formatArea(secondArea)}.`);
        return true;
    } catch (error) { setInfo(`Confronto non riuscito: ${error.message}`); return false; }
}

function numericEditManagedRecord(record) {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return; }
    if (record.layer?.feature?.properties?._lmeLocked) { setInfo("Sblocca prima l'oggetto."); return; }
    if (record.layer instanceof L.Circle) {
        const center = record.layer.getLatLng();
        const value = window.prompt("Latitudine, longitudine, raggio in metri", `${center.lat.toFixed(7)}, ${center.lng.toFixed(7)}, ${record.layer.getRadius().toFixed(2)}`);
        if (value === null) return;
        const parts = value.split(/[;, ]+/).map(Number).filter(Number.isFinite);
        if (parts.length < 3) { setInfo("Inserisci latitudine, longitudine e raggio validi."); return; }
        rememberMapChange(); record.layer.setLatLng([parts[0], parts[1]]); record.layer.setRadius(parts[2]); annotateDrawingLayer(record.layer, "circle");
    } else if (typeof record.layer?.getLatLng === "function") {
        const point = record.layer.getLatLng();
        const value = window.prompt("Latitudine, longitudine", `${point.lat.toFixed(7)}, ${point.lng.toFixed(7)}`);
        if (value === null) return;
        const parts = value.split(/[;, ]+/).map(Number).filter(Number.isFinite);
        if (parts.length < 2) { setInfo("Inserisci coordinate valide."); return; }
        rememberMapChange(); record.layer.setLatLng([parts[0], parts[1]]);
    } else {
        const lines = lineLatLngGroups(record.layer.getLatLngs());
        const current = lines[0]?.map(point => `${point.lat.toFixed(7)},${point.lng.toFixed(7)}`).join("; ") || "";
        const value = window.prompt("Vertici: coppie latitudine,longitudine separate da punto e virgola", current);
        if (value === null) return;
        const points = value.split(";").map(pair => pair.split(",").map(Number)).filter(pair => pair.length === 2 && pair.every(Number.isFinite));
        if (points.length < 2) { setInfo("Servono almeno due vertici validi."); return; }
        rememberMapChange(); record.layer.setLatLngs(points.map(point => L.latLng(point[0], point[1])));
    }
    finishManagedGeometryChange("Coordinate aggiornate.");
}

function replaceManagedLayer(record, feature) {
    const parent = record.parent?.hasLayer?.(record.layer) ? record.parent : lmeState.drawings;
    parent.removeLayer?.(record.layer);
    clearManagedObjectState(record.id);
    feature.properties = { ...(record.layer.feature?.properties || {}), ...(feature.properties || {}), _lmeManagerId: undefined };
    addDrawingFeature(feature);
}

function removeRecordWithoutPrompt(record) {
    record.parent?.removeLayer?.(record.layer); clearManagedObjectState(record.id);
}

function finishManagedGeometryChange(message) {
    refreshImportedMeasurements(); refreshDrawingMeasurements(); refreshPermanentLabels(); updateGpsInsideState(); refreshLayerManager(); finishMapChange(); setInfo(message);
}

function rememberMapChange() {
    if (lmeState.historyBusy || !lmeState.map) return;
    const snapshot = createProjectSnapshot(true);
    if (lmeState.undoStack.at(-1) !== snapshot) lmeState.undoStack.push(snapshot);
    if (lmeState.undoStack.length > 30) lmeState.undoStack.shift();
    lmeState.redoStack = [];
}

function finishMapChange() {
    if (lmeState.historyBusy || !lmeState.map) return;
    const action = arguments[0] || "Modifica mappa";
    lmeState.isDirty = true;
    lmeState.auditLog.push({ at: new Date().toISOString(), action });
    if (lmeState.auditLog.length > 250) lmeState.auditLog.shift();
    if (lmeState.autoSaveEnabled) {
        try { localStorage.setItem("lmeAutosaveV3", createProjectSnapshot(true)); } catch { }
    }
    window.clearTimeout(lmeState.changeNotifyTimer);
    lmeState.changeNotifyTimer = window.setTimeout(() => {
        void lmeState.dotNetReference?.invokeMethodAsync("OnMapChanged", action);
    }, 450);
}

function getHistoryState() {
    return { canUndo: lmeState.undoStack.length > 0, canRedo: lmeState.redoStack.length > 0, dirty: lmeState.isDirty };
}

function markProjectSaved() {
    lmeState.isDirty = false;
    void lmeState.dotNetReference?.invokeMethodAsync("OnProjectSaved");
}

function confirmDiscardChanges(actionLabel) {
    return !lmeState.isDirty || window.confirm(`Ci sono modifiche non salvate. Continuare e ${actionLabel || "abbandonarle"}?`);
}

function setProjectReadOnly(enabled) {
    lmeState.readOnly = Boolean(enabled);
    document.querySelector(".map-app")?.classList.toggle("project-readonly", lmeState.readOnly);
    if (lmeState.readOnly) setDrawToolsVisible(false);
    refreshLayerManager();
    setInfo(lmeState.readOnly ? "Progetto aperto in sola lettura. Duplicalo per modificarlo." : "Progetto modificabile.");
}

function undoMapChange() {
    if (!lmeState.undoStack.length) { setInfo("Nessuna operazione da annullare."); return; }
    lmeState.redoStack.push(createProjectSnapshot(true));
    restoreHistorySnapshot(lmeState.undoStack.pop(), "Operazione annullata.");
    lmeState.isDirty = true;
}

function redoMapChange() {
    if (!lmeState.redoStack.length) { setInfo("Nessuna operazione da ripristinare."); return; }
    lmeState.undoStack.push(createProjectSnapshot(true));
    restoreHistorySnapshot(lmeState.redoStack.pop(), "Operazione ripristinata.");
    lmeState.isDirty = true;
}

function restoreLastTrashItem() {
    if (lmeState.readOnly) { setInfo("Il progetto e' in sola lettura."); return false; }
    const entry = lmeState.trash.pop();
    if (!entry) { setInfo("Il cestino e' vuoto."); return false; }
    rememberMapChange();
    entry.items.forEach(item => {
        if (item.categoryKey === "imported") addImportedFeatures({ type: "FeatureCollection", features: [item.feature] });
        else if (item.categoryKey === "importedSheets") addImportedSheetFeatures({ type: "FeatureCollection", features: [item.feature] });
        else addDrawingFeature(item.feature);
    });
    refreshLayerManager();
    finishManagedGeometryChange(`Ripristinati ${entry.items.length} oggetti dal cestino.`);
    return true;
}

function emptyTrash() {
    if (!lmeState.trash.length) { setInfo("Il cestino e' gia vuoto."); return 0; }
    if (!window.confirm(`Eliminare definitivamente ${lmeState.trash.reduce((sum, entry) => sum + entry.items.length, 0)} oggetti dal cestino?`)) return lmeState.trash.length;
    lmeState.trash = [];
    setInfo("Cestino svuotato.");
    return 0;
}

function restoreHistorySnapshot(snapshot, message) {
    lmeState.historyBusy = true;
    try { loadProjectSnapshot(snapshot, "cronologia"); setInfo(message); } finally { lmeState.historyBusy = false; }
}

function restoreAutosave() {
    const snapshot = localStorage.getItem("lmeAutosaveV3");
    if (!snapshot) { setInfo("Nessun recupero automatico disponibile."); return false; }
    rememberMapChange(); loadProjectSnapshot(snapshot, "recupero automatico"); return true;
}

function setAdvancedOptions(options) {
    const value = options || {};
    lmeState.snapEnabled = value.snapEnabled !== false;
    lmeState.snapDistancePixels = Math.max(4, Math.min(40, Number(value.snapDistancePixels) || 14));
    lmeState.autoSaveEnabled = value.autoSaveEnabled !== false;
    lmeState.gpsProximityEnabled = value.gpsProximityEnabled !== false;
    lmeState.gpsBoundaryAlertEnabled = Boolean(value.gpsBoundaryAlertEnabled);
}

function compareProjectSnapshots(currentRaw, previousRaw) {
    const current = typeof currentRaw === "string" ? JSON.parse(currentRaw) : currentRaw;
    const previous = typeof previousRaw === "string" ? JSON.parse(previousRaw) : previousRaw;
    const collect = snapshot => ["drawings", "imported", "importedSheets", "selectedParcels"]
        .flatMap(key => snapshot?.[key]?.features || []);
    const keyFor = (feature, index) => feature?.properties?._lmeManagerId
        || `${feature?.properties?.name || feature?.properties?.Name || "object"}:${index}`;
    const currentMap = new Map(collect(current).map((feature, index) => [keyFor(feature, index), JSON.stringify(feature)]));
    const previousMap = new Map(collect(previous).map((feature, index) => [keyFor(feature, index), JSON.stringify(feature)]));
    let added = 0; let removed = 0; let changed = 0;
    currentMap.forEach((value, key) => { if (!previousMap.has(key)) added++; else if (previousMap.get(key) !== value) changed++; });
    previousMap.forEach((_value, key) => { if (!currentMap.has(key)) removed++; });
    const message = `Confronto revisione: ${added} aggiunti, ${removed} rimossi, ${changed} modificati.`;
    setInfo(message);
    return message;
}

function renderLayerManagerVisibilityOption(label, checked, onChange) {
    const option = document.createElement("label");
    option.className = "layer-manager-suboption";
    option.innerHTML = `<input type="checkbox" ${checked ? "checked" : ""}><span>${escapeHtml(label)}</span>`;
    const checkbox = option.querySelector("input");
    checkbox.addEventListener("click", event => event.stopPropagation());
    checkbox.addEventListener("change", () => onChange(checkbox.checked));
    return option;
}

function geometryVisibilityLabel(layer) {
    if (layer instanceof L.Polygon || layer instanceof L.Circle) {
        return "Area/geometria sulla mappa";
    }
    if (layer instanceof L.Polyline) {
        return "Linea sulla mappa";
    }
    return "Punto sulla mappa";
}

function supportsManagedMeasurements(record) {
    return ["imported", "drawings"].includes(record.categoryKey)
        && (record.layer instanceof L.Circle
            || record.layer instanceof L.Polygon
            || record.layer instanceof L.Polyline);
}

function managedMeasurementsGloballyVisible(categoryKey) {
    return categoryKey === "imported"
        ? lmeState.showImportedMeasurements
        : lmeState.showDrawingMeasurements;
}

function managedMeasurementKinds(record) {
    if (record.layer instanceof L.Polygon) {
        return [
            { key: "summary", label: "Superficie e perimetro sulla mappa" },
            { key: "sides", label: "Misure dei lati sulla mappa" }
        ];
    }
    if (record.layer instanceof L.Circle) {
        return [{ key: "summary", label: "Superficie, raggio e circonferenza sulla mappa" }];
    }
    return [
        { key: "summary", label: "Lunghezza totale sulla mappa" },
        { key: "sides", label: "Misure dei tratti sulla mappa" }
    ];
}

function managedMeasurementHiddenSet(kind) {
    return kind === "sides"
        ? lmeState.managerHiddenMeasurementSideIds
        : lmeState.managerHiddenMeasurementSummaryIds;
}

function setManagedMeasurementKindVisible(record, kind, visible) {
    const hiddenSet = managedMeasurementHiddenSet(kind);
    if (visible) {
        if (!managedMeasurementsGloballyVisible(record.categoryKey)) {
            lmeState.managerRecords.forEach(candidate => {
                if (candidate.categoryKey === record.categoryKey
                    && supportsManagedMeasurements(candidate)) {
                    lmeState.managerHiddenMeasurementSummaryIds.add(candidate.id);
                    lmeState.managerHiddenMeasurementSideIds.add(candidate.id);
                }
            });
            if (record.categoryKey === "imported") {
                lmeState.showImportedMeasurements = true;
            } else {
                lmeState.showDrawingMeasurements = true;
            }
            void lmeState.dotNetReference?.invokeMethodAsync(
                "SetMeasurementsFromLayerManager",
                record.categoryKey,
                true);
        }
        hiddenSet.delete(record.id);
    } else {
        hiddenSet.add(record.id);
    }
    refreshImportedMeasurements();
    refreshDrawingMeasurements();
    refreshLayerManager();
}

function captureLayerManagerExpansion(container) {
    container.querySelectorAll("details[data-expansion-key]").forEach(row => {
        if (row.open) {
            lmeState.managerExpandedRows.add(row.dataset.expansionKey);
        } else {
            lmeState.managerExpandedRows.delete(row.dataset.expansionKey);
        }
    });
}

function bindLayerManagerExpansion(row, key) {
    row.dataset.expansionKey = key;
    row.open = lmeState.managerExpandedRows.has(key);
    row.addEventListener("toggle", () => {
        if (row.open) {
            lmeState.managerExpandedRows.add(key);
        } else {
            lmeState.managerExpandedRows.delete(key);
        }
    });
}

function setManagedCategoryVisible(category, visible) {
    if (category.key === "imported") {
        lmeState.importedVisible = visible;
    } else if (category.key === "importedSheets") {
        lmeState.importedSheetsVisible = visible;
    } else if (category.key === "selectedParcels") {
        lmeState.selectedParcelsVisible = visible;
    } else if (category.key === "gpsPosition") {
        lmeState.gpsPositionVisible = visible;
    }
    if (visible) {
        lmeState.managerHiddenCategories.delete(category.key);
        category.roots.forEach(layer => {
            const objectId = managedLayerId(layer, category.key);
            if (layer
                && !lmeState.managerHiddenObjectIds.has(objectId)
                && !lmeState.map.hasLayer(layer)) {
                layer.addTo(lmeState.map);
            }
        });
    } else {
        lmeState.managerHiddenCategories.add(category.key);
        category.roots.forEach(layer => {
            if (layer && lmeState.map.hasLayer(layer)) {
                lmeState.map.removeLayer(layer);
            }
        });
        if (lmeState.managerHighlightedCategoryKey === category.key) {
            clearManagerHighlight();
        }
    }
    saveLayerManagerState();
    refreshImportedMeasurements();
    refreshDrawingMeasurements();
    refreshLayerManager();
}

function setManagedObjectVisible(record, visible, refresh = true) {
    if (visible) {
        const hidden = lmeState.managerHiddenObjects.get(record.id);
        if (hidden) {
            if (hidden.parent !== lmeState.map || managedCategoryEnabled(record.categoryKey)) {
                hidden.parent.addLayer(hidden.layer);
            }
            lmeState.managerHiddenObjects.delete(record.id);
        }
        lmeState.managerHiddenObjectIds.delete(record.id);
    } else if (!lmeState.managerHiddenObjects.has(record.id)) {
        lmeState.managerHiddenObjects.set(record.id, record);
        lmeState.managerHiddenObjectIds.add(record.id);
        record.parent.removeLayer(record.layer);
        if (lmeState.managerHighlightedObjectId === record.id) {
            clearManagerHighlight();
        }
    }
    saveLayerManagerState();
    refreshImportedMeasurements();
    refreshDrawingMeasurements();
    refreshPermanentLabels();
    if (refresh) {
        refreshLayerManager();
    }
}

function managedCategoryEnabled(categoryKey) {
    if (lmeState.managerHiddenCategories.has(categoryKey)) {
        return false;
    }
    if (categoryKey === "gpsPosition") {
        return lmeState.gpsPositionVisible;
    }
    if (categoryKey === "imported") {
        return lmeState.importedVisible;
    }
    if (categoryKey === "importedSheets") {
        return lmeState.importedSheetsVisible;
    }
    if (categoryKey === "selectedParcels") {
        return lmeState.selectedParcelsVisible;
    }
    return true;
}

function highlightManagedObject(record) {
    if (lmeState.managerHighlightedObjectId === record.id) {
        clearManagerHighlight();
        return;
    }
    clearManagerHighlight();
    lmeState.managerHighlightedObjectId = record.id;
    lmeState.managerHighlightedCategoryKey = record.categoryKey;
    document.querySelectorAll(".layer-manager-object").forEach(row => {
        row.classList.toggle("layer-manager-object-selected", row.dataset.objectId === record.id);
    });
    setSelectedDrawing(record.categoryKey === "drawings" ? record.layer : null);
    renderManagerHighlight([record]);
    fitLayer(record.layer);
}

function drawingEditToolbar() {
    return lmeState.drawControl?._toolbars?.[L.EditToolbar.TYPE] || null;
}

function drawingEditActive() {
    return Boolean(drawingEditToolbar()?.enabled?.());
}

function updateDrawingSelectionActions() {
    const hasSelection = Boolean(lmeState.drawingSelection?.getLayers?.().length);
    const hasDrawings = Boolean(lmeState.drawings?.getLayers?.().length);
    lmeState.drawingDeleteButton?.classList.toggle("leaflet-disabled", !hasDrawings);
    if (lmeState.drawingDeleteButton) {
        lmeState.drawingDeleteButton.setAttribute("aria-disabled", String(!hasDrawings));
    }
    lmeState.drawingScopeMenu?.querySelector("[data-drawing-scope='selected']")
        ?.setAttribute("aria-disabled", String(!hasSelection));
}

function setSelectedDrawing(layer) {
    if (!lmeState.drawingSelection || drawingEditActive()) {
        return;
    }
    lmeState.drawingSelection.clearLayers();
    if (layer) {
        lmeState.drawingSelection.addLayer(layer);
    }
    updateDrawingSelectionActions();
}

function selectDrawingLayer(layer) {
    if (drawingEditActive()) {
        return;
    }
    const record = {
        id: managedLayerId(layer, "drawings"),
        categoryKey: "drawings",
        layer,
        parent: lmeState.drawings,
        source: String(layer?.feature?.properties?._lmeSource || "Progetto corrente")
    };
    clearManagerHighlight();
    lmeState.managerHighlightedObjectId = record.id;
    lmeState.managerHighlightedCategoryKey = "drawings";
    document.querySelectorAll(".layer-manager-object").forEach(row => {
        row.classList.toggle("layer-manager-object-selected", row.dataset.objectId === record.id);
    });
    setSelectedDrawing(layer);
    renderManagerHighlight([record]);
    setInfo(`Selezione: ${managedObjectLabel(record, 0)}. Usa la matita per modificare o il cestino per eliminare.`);
}

function bindManagedParentHighlight(row, key, records) {
    const summary = row.querySelector(":scope > summary");
    row.dataset.highlightKey = key;
    row.classList.toggle("layer-manager-parent-selected", lmeState.managerHighlightedParentKey === key);
    if (lmeState.managerHighlightedParentKey === key) {
        lmeState.managerHighlightedParentRecords = records;
    }
    row.querySelector(":scope > summary > .layer-manager-title").addEventListener("click", event => {
        event.preventDefault();
        event.stopPropagation();
        row.open = true;
        highlightManagedParent(row, key, records);
    });
    summary.addEventListener("pointerenter", () => {
        lmeState.managerHoveredParentKey = key;
        lmeState.managerHoveredParentRecords = records;
        row.classList.add("layer-manager-parent-highlighted");
        renderManagerHighlight(records);
    });
    summary.addEventListener("pointerleave", () => {
        if (lmeState.managerHoveredParentKey !== key) {
            return;
        }
        lmeState.managerHoveredParentKey = null;
        lmeState.managerHoveredParentRecords = null;
        row.classList.remove("layer-manager-parent-highlighted");
        renderSelectedManagerHighlight();
    });
}

function highlightManagedParent(row, key, records) {
    if (lmeState.managerHighlightedParentKey === key) {
        clearManagerHighlight();
        return;
    }
    clearManagerHighlight();
    lmeState.managerHighlightedParentKey = key;
    lmeState.managerHighlightedParentRecords = records;
    lmeState.managerHighlightedCategoryKey = records[0]?.categoryKey || null;
    setSelectedDrawing(null);
    row.classList.add("layer-manager-parent-selected");
    renderManagerHighlight(records);
}

function renderSelectedManagerHighlight() {
    if (lmeState.managerHighlightedParentRecords?.length) {
        renderManagerHighlight(lmeState.managerHighlightedParentRecords);
        return;
    }
    const selected = lmeState.managerRecords.get(lmeState.managerHighlightedObjectId);
    renderManagerHighlight(selected ? [selected] : []);
}

function renderManagerHighlight(records) {
    lmeState.managerHighlight?.clearLayers();
    const features = records.flatMap(record => {
        const geojson = record.layer?.toGeoJSON?.();
        if (!geojson) {
            return [];
        }
        return geojson.type === "FeatureCollection" ? geojson.features : [geojson];
    });
    if (!features.length) {
        return;
    }
    L.geoJSON({ type: "FeatureCollection", features }, {
        pane: "managerHighlightPane",
        interactive: false,
        style: { color: "#ff00d4", weight: 8, opacity: 1, fillColor: "#00fff0", fillOpacity: 0.16 },
        pointToLayer: (feature, latlng) => L.circleMarker(latlng, {
            pane: "managerHighlightPane",
            radius: 12,
            color: "#ff00d4",
            weight: 5,
            fillColor: "#00fff0",
            fillOpacity: 0.9,
            interactive: false
        })
    }).addTo(lmeState.managerHighlight);
}

function clearManagerHighlight() {
    lmeState.managerHighlight?.clearLayers();
    lmeState.managerHighlightedObjectId = null;
    lmeState.managerHighlightedCategoryKey = null;
    lmeState.managerHighlightedParentKey = null;
    lmeState.managerHighlightedParentRecords = null;
    lmeState.managerHoveredParentKey = null;
    lmeState.managerHoveredParentRecords = null;
    setSelectedDrawing(null);
    document.querySelectorAll(".layer-manager-object-selected").forEach(row => {
        row.classList.remove("layer-manager-object-selected");
    });
    document.querySelectorAll(".layer-manager-parent-highlighted").forEach(row => {
        row.classList.remove("layer-manager-parent-highlighted");
    });
    document.querySelectorAll(".layer-manager-parent-selected").forEach(row => {
        row.classList.remove("layer-manager-parent-selected");
    });
}

function layerManagerMoveButtons(label) {
    return `<span class="layer-move-buttons"><button type="button" class="layer-move-up" aria-label="Sposta ${label} su" title="Sposta su">↑</button><button type="button" class="layer-move-down" aria-label="Sposta ${label} giù" title="Sposta giù">↓</button></span>`;
}

function bindLayerManagerDrag(container) {
    container.querySelectorAll(".layer-drag-handle").forEach(handle => {
        handle.addEventListener("pointerdown", event => {
            event.preventDefault();
            event.stopPropagation();
            const row = handle.closest("[data-drag-type]");
            const list = row.parentElement;
            row.classList.add("layer-manager-dragging");
            handle.setPointerCapture?.(event.pointerId);
            const move = moveEvent => {
                moveEvent.preventDefault();
                const target = document.elementFromPoint(moveEvent.clientX, moveEvent.clientY)?.closest(`[data-drag-type="${row.dataset.dragType}"]`);
                if (!target || target === row || target.parentElement !== list) {
                    return;
                }
                const targetRect = target.getBoundingClientRect();
                list.insertBefore(row, moveEvent.clientY < targetRect.top + targetRect.height / 2 ? target : target.nextSibling);
            };
            const end = () => {
                row.classList.remove("layer-manager-dragging");
                handle.releasePointerCapture?.(event.pointerId);
                document.removeEventListener("pointermove", move);
                document.removeEventListener("pointerup", end);
                document.removeEventListener("pointercancel", end);
                applyLayerManagerDomOrder(container);
            };
            document.addEventListener("pointermove", move, { passive: false });
            document.addEventListener("pointerup", end);
            document.addEventListener("pointercancel", end);
        });
    });
}

function bindLayerManagerMoveButtons(container) {
    container.querySelectorAll(".layer-move-up, .layer-move-down").forEach(button => {
        button.addEventListener("click", event => {
            event.preventDefault();
            event.stopPropagation();
            const row = button.closest("[data-drag-type]");
            const sibling = button.classList.contains("layer-move-up")
                ? row.previousElementSibling
                : row.nextElementSibling;
            if (!sibling || sibling.dataset.dragType !== row.dataset.dragType) {
                return;
            }
            if (button.classList.contains("layer-move-up")) {
                row.parentElement.insertBefore(row, sibling);
            } else {
                row.parentElement.insertBefore(sibling, row);
            }
            applyLayerManagerDomOrder(container);
        });
    });
}

function applyLayerManagerDomOrder(container) {
    const categoryKeys = [...container.children].map(row => row.dataset.categoryKey).filter(Boolean);
    setLayerOrder(categoryKeys);
    container.querySelectorAll(":scope > .layer-manager-group").forEach(group => {
        const objectIds = [...group.querySelectorAll(".layer-manager-object")].map(row => row.dataset.objectId).filter(Boolean);
        lmeState.managerObjectOrder[group.dataset.categoryKey] = objectIds;
    });
    applyManagedVisualOrder(container);
    saveLayerManagerState();
}

function applyManagedVisualOrder(container) {
    container.querySelectorAll(":scope > .layer-manager-group").forEach(group => {
        const objectIds = [...group.querySelectorAll(".layer-manager-object")].map(row => row.dataset.objectId).filter(Boolean);
        [...objectIds].reverse().forEach(id => lmeState.managerRecords.get(id)?.layer?.bringToFront?.());
        objectIds.forEach((id, index) => lmeState.managerRecords.get(id)?.layer?.setZIndexOffset?.(1000 - index));
    });
}

function setImportedSheetLayerVisible(enabled) {
    migrateMisclassifiedImportedSheets();
    lmeState.importedSheetsVisible = Boolean(enabled);
    const generated = lmeState.importedSheetsVisible && ensureImportedSheetOutline();
    applyImportedSheetVisibility();
    const count = lmeState.importedSheets?.toGeoJSON()?.features?.length || 0;
    setInfo(lmeState.importedSheetsVisible
        ? (count
            ? `${generated ? "Cornice generata dai dati importati" : "Layer del foglio importato visibile"} (${count} elementi).`
            : "Nessun dato importato da cui ricavare la cornice del foglio.")
        : "Layer del foglio importato nascosto; le particelle restano visibili.");
}

function ensureImportedSheetOutline() {
    if (!lmeState.imported || !lmeState.importedSheets) {
        return false;
    }

    const currentSheets = lmeState.importedSheets.toGeoJSON();
    const hasAreaOutline = (currentSheets.features || []).some(feature =>
        ["Polygon", "MultiPolygon"].includes(feature?.geometry?.type));
    if (hasAreaOutline) {
        return false;
    }

    const imported = lmeState.imported.toGeoJSON();
    const points = collectGeoJsonCoordinates(imported);
    if (!points.length) {
        return false;
    }

    const bounds = points.reduce((result, point) => ({
        west: Math.min(result.west, point[0]),
        south: Math.min(result.south, point[1]),
        east: Math.max(result.east, point[0]),
        north: Math.max(result.north, point[1])
    }), { west: Infinity, south: Infinity, east: -Infinity, north: -Infinity });
    if (!Number.isFinite(bounds.west)
        || !Number.isFinite(bounds.south)
        || bounds.east <= bounds.west
        || bounds.north <= bounds.south) {
        return false;
    }

    const longitudePadding = Math.max((bounds.east - bounds.west) * 0.01, 0.000001);
    const latitudePadding = Math.max((bounds.north - bounds.south) * 0.01, 0.000001);
    const west = bounds.west - longitudePadding;
    const south = bounds.south - latitudePadding;
    const east = bounds.east + longitudePadding;
    const north = bounds.north + latitudePadding;
    addImportedSheetFeatures({
        type: "FeatureCollection",
        features: [{
            type: "Feature",
            properties: {
                name: "Cornice del foglio importato",
                _lmeGeneratedSheetOutline: true
            },
            geometry: {
                type: "Polygon",
                coordinates: [[
                    [west, south],
                    [east, south],
                    [east, north],
                    [west, north],
                    [west, south]
                ]]
            }
        }]
    });
    return true;
}

function migrateMisclassifiedImportedSheets() {
    if (!lmeState.imported || !lmeState.importedSheets) {
        return 0;
    }

    const current = lmeState.imported.toGeoJSON();
    const misplaced = (current.features || []).filter(isSheetOrOverlayFeature);
    if (!misplaced.length) {
        return 0;
    }

    const retained = (current.features || []).filter(feature => !isSheetOrOverlayFeature(feature));
    lmeState.imported.clearLayers();
    addImportedFeatures({ type: "FeatureCollection", features: retained });
    addImportedSheetFeatures({ type: "FeatureCollection", features: misplaced });
    refreshImportedMeasurements();
    return misplaced.length;
}

function addImportedFeatures(geojson) {
    const layer = L.geoJSON(geojson || emptyFeatureCollection(), {
        pane: "importedPane",
        style: { color: "#22c55e", weight: 3, opacity: 0.95, fillOpacity: 0.18 },
        pointToLayer: (feature, latlng) => L.circleMarker(latlng, {
            pane: "importedPane",
            radius: 7,
            color: "#22c55e",
            fillColor: "#ffffff",
            fillOpacity: 0.9
        }),
        onEachFeature: (feature, layer) => { bindStoredFeaturePopup(feature, layer); applyStyleFromProperties(layer); bindManagedMapSelection(layer, "imported", lmeState.imported); }
    }).addTo(lmeState.imported);
    layer.lmeManagerLabel = managedGeoJsonLabel(geojson, "Dati importati");
    return layer;
}

function addImportedSheetFeatures(geojson) {
    const layer = L.geoJSON(geojson || emptyFeatureCollection(), {
        pane: "importedSheetPane",
        style: { color: "#f59e0b", weight: 4, opacity: 1, fillOpacity: 0.03, dashArray: "10 6" },
        pointToLayer: (feature, latlng) => L.circleMarker(latlng, {
            pane: "importedSheetPane",
            radius: 7,
            color: "#f59e0b",
            fillColor: "#ffffff",
            fillOpacity: 0.85
        }),
        onEachFeature: (feature, layer) => { bindStoredFeaturePopup(feature, layer); applyStyleFromProperties(layer); bindManagedMapSelection(layer, "importedSheets", lmeState.importedSheets); }
    }).addTo(lmeState.importedSheets);
    layer.lmeManagerLabel = managedGeoJsonLabel(geojson, "Cornice o foglio");
    return layer;
}

function applyImportedSheetVisibility() {
    if (!lmeState.map || !lmeState.importedSheets) {
        return;
    }
    if (lmeState.importedSheetsVisible) {
        if (!lmeState.map.hasLayer(lmeState.importedSheets)) {
            lmeState.importedSheets.addTo(lmeState.map);
        }
        lmeState.importedSheets.bringToFront();
        return;
    }
    if (lmeState.map.hasLayer(lmeState.importedSheets)) {
        lmeState.map.removeLayer(lmeState.importedSheets);
    }
}

function setImportedMeasurementsVisible(enabled) {
    lmeState.showImportedMeasurements = Boolean(enabled);
    refreshImportedMeasurements();
    refreshLayerManager();
    setInfo(lmeState.showImportedMeasurements
        ? "Misure dei file GIS visibili."
        : "Misure dei file GIS nascoste.");
}

function setDrawingMeasurementsVisible(enabled) {
    lmeState.showDrawingMeasurements = Boolean(enabled);
    refreshDrawingMeasurements();
    refreshLayerManager();
    setInfo(lmeState.showDrawingMeasurements
        ? "Misure dei disegni visibili."
        : "Misure dei disegni nascoste.");
}

function fitImported() {
    const layers = [lmeState.imported];
    if (lmeState.importedSheetsVisible) {
        layers.push(lmeState.importedSheets);
    }
    fitLayer(L.featureGroup(layers));
}

function clearImported() {
    rememberMapChange();
    clearManagedCategoryState("imported");
    clearManagedCategoryState("importedSheets");
    lmeState.imported.clearLayers();
    lmeState.importedSheets.clearLayers();
    lmeState.importedSheetsVisible = false;
    applyImportedSheetVisibility();
    lmeState.importedMeasurements.clearLayers();
    setInfo("File GIS rimossi.");
    updateGpsInsideState();
    refreshLayerManager();
    finishMapChange();
}

function addProjectMarker(name) {
    rememberMapChange();
    const center = lmeState.map.getCenter();
    const label = (name || "Nuovo POI").trim();
    const marker = L.marker(center, { pane: "drawingsPane", draggable: false }).addTo(lmeState.drawings);
    marker.lmeManagerLabel = `POI: ${label}`;
    marker.feature = {
        type: "Feature",
        properties: { name: label }
    };
    marker.bindPopup(`<strong>${escapeHtml(label)}</strong><br>${center.lat.toFixed(6)}, ${center.lng.toFixed(6)}`).openPopup();
    bindDrawingLayerSelection(marker);
    refreshDrawingMeasurements();
    refreshLayerManager();
    selectDrawingLayer(marker);
    finishMapChange();
}

function configureDrawLabels() {
    L.drawLocal.draw.toolbar.buttons.polygon = "Misura area";
    L.drawLocal.draw.toolbar.buttons.polyline = "Misura distanza";
    L.drawLocal.draw.toolbar.buttons.circle = "Misura cerchio";
    L.drawLocal.draw.toolbar.buttons.rectangle = "Disegna rettangolo";
    L.drawLocal.draw.toolbar.buttons.marker = "Aggiungi POI";
    L.drawLocal.edit.toolbar.buttons.edit = "Scegli quali disegni modificare";
    L.drawLocal.edit.toolbar.buttons.remove = "Scegli quali disegni eliminare";
    L.drawLocal.draw.handlers.polygon.tooltip.start = "Tocca il primo vertice dell'area.";
    L.drawLocal.draw.handlers.polygon.tooltip.cont = "Tocca per aggiungere un vertice.";
    L.drawLocal.draw.handlers.polygon.tooltip.end = "Tocca il primo punto per chiudere l'area.";
    L.drawLocal.draw.handlers.polyline.tooltip.start = "Tocca il primo punto della distanza.";
    L.drawLocal.draw.handlers.polyline.tooltip.cont = "Tocca per aggiungere un tratto.";
    L.drawLocal.draw.handlers.polyline.tooltip.end = "Tocca l'ultimo punto per terminare.";
    L.drawLocal.draw.handlers.circle.tooltip.start = "Tocca il centro e trascina per il raggio.";
}

function bindDrawingEvents() {
    if (!lmeState.map || lmeState.drawEventsBound) {
        return;
    }
    lmeState.map.on(L.Draw.Event.CREATED, event => {
        if (lmeState.readOnly) {
            setInfo("Il progetto e' in sola lettura.");
            return;
        }
        snapDrawingLayer(event.layer);
        annotateDrawingLayer(event.layer, event.layerType);
        lmeState.drawings.addLayer(event.layer);
        refreshDrawingMeasurements();
        updateGpsInsideState();
        const completedLabels = {
            polygon: "Area completata: superficie, perimetro e lati aggiornati.",
            rectangle: "Rettangolo completato: superficie, perimetro e lati aggiornati.",
            polyline: "Distanza completata: lunghezza totale e tratti aggiornati.",
            circle: "Cerchio completato: superficie, raggio e circonferenza aggiornati.",
            marker: "Punto aggiunto alla mappa."
        };
        setInfo(completedLabels[event.layerType] || "Disegno completato.");
        refreshLayerManager();
        selectDrawingLayer(event.layer);
        finishMapChange();
    });
    lmeState.map.on(L.Draw.Event.DRAWSTART, rememberMapChange);
    lmeState.map.on(L.Draw.Event.EDITSTART, rememberMapChange);
    lmeState.map.on(L.Draw.Event.EDITED, event => {
        event.layers.eachLayer(layer => { snapDrawingLayer(layer); annotateDrawingLayer(layer); });
        refreshDrawingMeasurements();
        updateGpsInsideState();
        refreshLayerManager();
        finishMapChange();
    });
    lmeState.map.on(L.Draw.Event.DELETED, event => {
        event.layers?.eachLayer(layer => lmeState.drawings.removeLayer(layer));
        clearManagerHighlight();
        refreshDrawingMeasurements();
        updateGpsInsideState();
        refreshLayerManager();
        finishMapChange();
    });
    lmeState.map.on(L.Draw.Event.DRAWSTOP, () => {
        lmeState.activeDrawHandler = null;
    });
    lmeState.drawEventsBound = true;
}

function enableDrawTools() {
    if (lmeState.drawControl) {
        setInfo("Strumenti di disegno gia attivi.");
        return;
    }

    configureDrawLabels();
    const orangeArea = {
        pane: "drawingsPane",
        renderer: lmeState.drawingsRenderer,
        color: "#f97316",
        weight: 4,
        fillColor: "#fb923c",
        fillOpacity: 0.2
    };
    lmeState.drawControl = new L.Control.Draw({
        position: "topright",
        edit: {
            featureGroup: lmeState.drawings,
            remove: false,
            edit: {
                selectedPathOptions: {
                    color: "#ff00d4",
                    fillColor: "#00fff0",
                    fillOpacity: 0.16,
                    maintainColor: false
                }
            }
        },
        draw: {
            circle: { metric: true, feet: false, showRadius: true, shapeOptions: orangeArea },
            circlemarker: false,
            marker: { zIndexOffset: 0 },
            polygon: {
                metric: true,
                feet: false,
                showArea: true,
                allowIntersection: false,
                shapeOptions: orangeArea
            },
            polyline: {
                metric: true,
                feet: false,
                showLength: true,
                shapeOptions: {
                    pane: "drawingsPane",
                    renderer: lmeState.drawingsRenderer,
                    color: "#f97316",
                    weight: 4,
                    opacity: 0.95
                }
            },
            rectangle: { metric: true, shapeOptions: orangeArea }
        }
    });
    lmeState.map.addControl(lmeState.drawControl);
    installDrawingScopeControls();
    bindDrawingEvents();
    setInfo("Barra strumenti attiva: seleziona un disegno sulla mappa, poi usa matita o cestino.");
}

function installDrawingScopeControls() {
    const toolbar = drawingEditToolbar();
    const container = toolbar?._toolbarContainer;
    if (!container) {
        return;
    }
    const editButton = toolbar._modes?.[L.EditToolbar.Edit.TYPE]?.button;
    editButton?.addEventListener("click", event => {
        event.preventDefault();
        event.stopImmediatePropagation();
        showDrawingScopeMenu(editButton, "edit");
    }, true);
    const button = L.DomUtil.create("a", "leaflet-draw-edit-remove", container);
    button.href = "#";
    button.title = L.drawLocal.edit.toolbar.buttons.remove;
    button.setAttribute("role", "button");
    button.setAttribute("aria-label", L.drawLocal.edit.toolbar.buttons.remove);
    const accessibleLabel = L.DomUtil.create("span", "sr-only", button);
    accessibleLabel.textContent = L.drawLocal.edit.toolbar.buttons.remove;
    L.DomEvent.on(button, "click", L.DomEvent.stop)
        .on(button, "mousedown", L.DomEvent.stopPropagation)
        .on(button, "touchstart", L.DomEvent.stopPropagation)
        .on(button, "click", () => showDrawingScopeMenu(button, "delete"));
    lmeState.drawingDeleteButton = button;
    updateDrawingSelectionActions();
}

function showDrawingScopeMenu(button, action) {
    if (drawingEditActive()) {
        setInfo("Salva o annulla la modifica corrente prima di scegliere un altro comando.");
        return;
    }
    if (!lmeState.drawings?.getLayers?.().length) {
        setInfo("Non ci sono disegni o POI su cui operare.");
        return;
    }
    if (lmeState.drawingScopeMenu?.dataset.action === action) {
        hideDrawingScopeMenu();
        return;
    }
    hideDrawingScopeMenu();
    const menu = document.createElement("ul");
    menu.className = "leaflet-draw-actions lme-drawing-scope-actions";
    menu.dataset.action = action;
    menu.style.display = "block";
    menu.style.top = `${button.offsetTop - 1}px`;
    menu.innerHTML = `<li><a href="#" data-drawing-scope="selected">Solo selezionato</a></li><li><a href="#" data-drawing-scope="all">Tutti</a></li>`;
    button.closest(".leaflet-draw-section")?.appendChild(menu);
    lmeState.drawingScopeMenu = menu;
    const hasSelection = Boolean(lmeState.drawingSelection?.getLayers?.().length);
    const selectedAction = menu.querySelector("[data-drawing-scope='selected']");
    selectedAction.setAttribute("aria-disabled", String(!hasSelection));
    menu.querySelectorAll("a").forEach(link => {
        L.DomEvent.on(link, "click", L.DomEvent.stop)
            .on(link, "mousedown", L.DomEvent.stopPropagation)
            .on(link, "touchstart", L.DomEvent.stopPropagation)
            .on(link, "click", () => runDrawingScopeAction(action, link.dataset.drawingScope));
    });
}

function hideDrawingScopeMenu() {
    lmeState.drawingScopeMenu?.remove();
    lmeState.drawingScopeMenu = null;
}

function runDrawingScopeAction(action, scope) {
    const targetGroup = scope === "selected" ? lmeState.drawingSelection : lmeState.drawings;
    if (!targetGroup?.getLayers?.().length) {
        setInfo("Seleziona prima un oggetto sulla mappa.");
        return;
    }
    hideDrawingScopeMenu();
    if (action === "edit") {
        startScopedDrawingEdit(targetGroup, scope);
    } else if (scope === "selected") {
        removeSelectedDrawing();
    } else {
        clearDrawings();
    }
}

function startScopedDrawingEdit(targetGroup, scope) {
    const toolbar = drawingEditToolbar();
    const mode = toolbar?._modes?.[L.EditToolbar.Edit.TYPE];
    if (!mode?.handler) {
        return;
    }
    const locked = targetGroup.getLayers().filter(layer => layer?.feature?.properties?._lmeLocked);
    if (locked.length) { setInfo("Sblocca gli oggetti prima di modificarli."); return; }
    rememberMapChange();
    mode.handler._featureGroup = targetGroup;
    mode.handler.options.featureGroup = targetGroup;
    mode.handler.enable();
    setInfo(scope === "selected"
        ? "Modifica attiva sul solo oggetto selezionato."
        : "Modifica attiva su tutti i disegni e POI.");
}

function removeSelectedDrawing() {
    const layer = lmeState.drawingSelection?.getLayers?.()[0];
    if (!layer) {
        setInfo("Seleziona prima il disegno da eliminare toccandolo sulla mappa.");
        return;
    }
    if (drawingEditActive()) {
        setInfo("Salva o annulla la modifica prima di eliminare il disegno.");
        return;
    }
    if (layer.feature?.properties?._lmeLocked) { setInfo("Sblocca prima l'oggetto selezionato."); return; }
    const record = {
        id: managedLayerId(layer, "drawings"),
        categoryKey: "drawings",
        layer,
        parent: lmeState.drawings
    };
    const name = managedObjectLabel(record, 0);
    if (!window.confirm(`Eliminare solo '${name}' dal progetto?`)) {
        return;
    }
    rememberMapChange();
    lmeState.drawingSelection.clearLayers();
    lmeState.drawings.removeLayer(layer);
    clearManagedObjectState(record.id);
    clearManagerHighlight();
    refreshDrawingMeasurements();
    updateGpsInsideState();
    refreshLayerManager();
    finishMapChange();
    setInfo(`'${name}' eliminato dal progetto.`);
}

function startMeasurementDrawing(mode) {
    if (!lmeState.map) {
        return;
    }
    bindDrawingEvents();
    hideDrawingScopeMenu();
    if (lmeState.activeDrawHandler) {
        lmeState.activeDrawHandler.disable();
    }

    const handlers = {
        area: () => new L.Draw.Polygon(lmeState.map, {
            allowIntersection: false,
            showArea: true,
            metric: true,
            feet: false,
            shapeOptions: {
                pane: "drawingsPane",
                renderer: lmeState.drawingsRenderer,
                color: "#f97316",
                weight: 4,
                fillColor: "#fb923c",
                fillOpacity: 0.2
            }
        }),
        distance: () => new L.Draw.Polyline(lmeState.map, {
            metric: true,
            feet: false,
            showLength: true,
            shapeOptions: {
                pane: "drawingsPane",
                renderer: lmeState.drawingsRenderer,
                color: "#f97316",
                weight: 4,
                opacity: 0.95
            }
        }),
        circle: () => new L.Draw.Circle(lmeState.map, {
            metric: true,
            feet: false,
            showRadius: true,
            shapeOptions: {
                pane: "drawingsPane",
                renderer: lmeState.drawingsRenderer,
                color: "#f97316",
                weight: 4,
                fillColor: "#fb923c",
                fillOpacity: 0.2
            }
        })
    };
    const createHandler = handlers[mode];
    if (!createHandler) {
        setInfo("Modalita di misura non riconosciuta.");
        return;
    }

    lmeState.activeDrawHandler = createHandler();
    lmeState.activeDrawHandler.enable();
    const labels = {
        area: "Tocca i vertici dell'area; chiudi toccando il primo punto.",
        distance: "Tocca i punti del percorso; termina sull'ultimo punto.",
        circle: "Tocca il centro e trascina fino al raggio desiderato."
    };
    setInfo(labels[mode]);
}

function annotateDrawingLayer(layer, layerType) {
    layer.options.pane = "drawingsPane";
    if (layer instanceof L.Path) {
        layer.options.renderer = lmeState.drawingsRenderer;
    }
    layer.feature = layer.feature || { type: "Feature", properties: {} };
    layer.feature.properties = layer.feature.properties || {};
    if (layer instanceof L.Circle) {
        layer.feature.properties._lmeShape = "circle";
        layer.feature.properties._lmeRadius = layer.getRadius();
    } else if (layerType) {
        layer.feature.properties._lmeShape = layerType;
    }
    layer.lmeManagerLabel = drawingLayerLabel(layer, layerType);
    bindDrawingLayerSelection(layer);
}

function bindDrawingLayerSelection(layer) {
    if (layer.lmeDrawingSelectionBound) {
        return;
    }
    layer.lmeDrawingSelectionBound = true;
    layer.on("click", event => {
        if (drawingEditActive()) {
            return;
        }
        lmeState.ignoreMapClickUntil = Date.now() + 1000;
        if (event.originalEvent) {
            event.originalEvent._lmeDrawingSelected = true;
            L.DomEvent.stopPropagation(event.originalEvent);
        }
        const id = managedLayerId(layer, "drawings");
        if (event.originalEvent?.ctrlKey || event.originalEvent?.metaKey || event.originalEvent?.shiftKey) {
            if (lmeState.managerSelectedObjectIds.has(id)) lmeState.managerSelectedObjectIds.delete(id);
            else lmeState.managerSelectedObjectIds.add(id);
        } else {
            lmeState.managerSelectedObjectIds.clear();
            lmeState.managerSelectedObjectIds.add(id);
        }
        selectDrawingLayer(layer);
        refreshLayerManager();
    });
}

function bindManagedMapSelection(layer, categoryKey, parent) {
    if (layer.lmeManagedMapSelectionBound) return;
    layer.lmeManagedMapSelectionBound = true;
    layer.on("click", event => {
        if (Date.now() < lmeState.ignoreMapClickUntil) return;
        lmeState.ignoreMapClickUntil = Date.now() + 600;
        if (event.originalEvent) {
            event.originalEvent._lmeDrawingSelected = true;
            L.DomEvent.stopPropagation(event.originalEvent);
        }
        const record = { id: managedLayerId(layer, categoryKey), categoryKey, layer, parent, source: String(layer?.feature?.properties?._lmeSource || "Progetto corrente") };
        const multiple = event.originalEvent?.ctrlKey || event.originalEvent?.metaKey || event.originalEvent?.shiftKey;
        if (!multiple) lmeState.managerSelectedObjectIds.clear();
        if (multiple && lmeState.managerSelectedObjectIds.has(record.id)) lmeState.managerSelectedObjectIds.delete(record.id);
        else lmeState.managerSelectedObjectIds.add(record.id);
        highlightManagedObject(record);
        refreshLayerManager();
        setInfo(`Selezionato dalla mappa: ${managedObjectEditableName(record) || "oggetto"}.`);
    });
}

function setDrawToolsVisible(visible) {
    if (visible) {
        enableDrawTools();
        return;
    }

    if (!lmeState.drawControl) {
        return;
    }

    Object.values(lmeState.drawControl._toolbars || {}).forEach(toolbar => {
        if (typeof toolbar.disable === "function") {
            toolbar.disable();
        }
    });
    lmeState.map.removeControl(lmeState.drawControl);
    lmeState.drawControl = null;
    lmeState.drawingDeleteButton = null;
    lmeState.drawingScopeMenu = null;
    setInfo("Strumenti di disegno nascosti.");
}

function clearDrawings() {
    const count = managedGroupGeoJson(lmeState.drawings, "drawings").features.length;
    if (!count) {
        setInfo("Non ci sono disegni o POI da eliminare.");
        return;
    }

    if (!window.confirm(`Eliminare ${count} disegni e POI dalla mappa?`)) {
        return;
    }

    if (managedRecordsForCategory(layerManagerCategories().find(item => item.key === "drawings")).some(record => record.layer?.feature?.properties?._lmeLocked)) {
        setInfo("Sblocca tutti i disegni prima di eliminarli."); return;
    }
    rememberMapChange();
    drawingEditToolbar()?.disable?.();
    lmeState.drawingSelection?.clearLayers();
    clearManagerHighlight();
    lmeState.drawings.clearLayers();
    clearManagedCategoryState("drawings");
    lmeState.drawingMeasurements.clearLayers();
    updateGpsInsideState();
    setInfo("Disegni e POI eliminati dalla mappa.");
    refreshLayerManager();
    finishMapChange();
}

function snapDrawingLayer(layer) {
    if (!lmeState.snapEnabled || !layer || layer instanceof L.Circle || layer instanceof L.Marker) return;
    const candidates = [];
    const segments = [];
    layerManagerCategories().forEach(category => managedRecordsForCategory(category).forEach(record => {
        if (record.layer === layer) return;
        lineLatLngGroups(record.layer?.getLatLngs?.() || []).forEach(line => {
            line.forEach(point => candidates.push(point));
            for (let index = 1; index < line.length; index++) segments.push([line[index - 1], line[index]]);
            if (record.layer instanceof L.Polygon && line.length > 2) segments.push([line.at(-1), line[0]]);
        });
        const point = record.layer?.getLatLng?.(); if (point) candidates.push(point);
    }));
    const snapPoint = point => {
        const pixel = lmeState.map.latLngToContainerPoint(point);
        let nearest = null; let distance = lmeState.snapDistancePixels;
        candidates.forEach(candidate => { const current = pixel.distanceTo(lmeState.map.latLngToContainerPoint(candidate)); if (current < distance) { distance = current; nearest = candidate; } });
        segments.forEach(([start, end]) => {
            const a = lmeState.map.latLngToContainerPoint(start); const b = lmeState.map.latLngToContainerPoint(end);
            const lengthSquared = (b.x - a.x) ** 2 + (b.y - a.y) ** 2;
            if (!lengthSquared) return;
            const ratio = Math.max(0, Math.min(1, ((pixel.x - a.x) * (b.x - a.x) + (pixel.y - a.y) * (b.y - a.y)) / lengthSquared));
            const projected = L.point(a.x + ratio * (b.x - a.x), a.y + ratio * (b.y - a.y));
            const current = pixel.distanceTo(projected);
            if (current < distance) { distance = current; nearest = lmeState.map.containerPointToLatLng(projected); }
            const midpoint = L.point((a.x + b.x) / 2, (a.y + b.y) / 2);
            const midpointDistance = pixel.distanceTo(midpoint);
            if (midpointDistance < distance) { distance = midpointDistance; nearest = lmeState.map.containerPointToLatLng(midpoint); }
        });
        return nearest ? L.latLng(nearest.lat, nearest.lng) : point;
    };
    const transform = value => Array.isArray(value) ? value.map(transform) : snapPoint(value);
    layer.setLatLngs(transform(layer.getLatLngs()));
}

function scheduleMeasurementRefresh() {
    window.clearTimeout(lmeState.measurementRefreshTimer);
    lmeState.measurementRefreshTimer = window.setTimeout(() => {
        refreshImportedMeasurements();
        refreshDrawingMeasurements();
    }, 80);
}

function refreshImportedMeasurements() {
    renderMeasurements(
        lmeState.imported,
        lmeState.importedMeasurements,
        lmeState.showImportedMeasurements,
        "imported");
}

function refreshDrawingMeasurements() {
    renderMeasurements(
        lmeState.drawings,
        lmeState.drawingMeasurements,
        lmeState.showDrawingMeasurements,
        "drawing");
}

function renderMeasurements(sourceGroup, targetGroup, visible, sourceType) {
    if (!sourceGroup || !targetGroup) {
        return;
    }
    targetGroup.clearLayers();
    if (!visible || !lmeState.map.hasLayer(sourceGroup)) {
        return;
    }

    const context = {
        count: 0,
        max: 600,
        showSides: lmeState.map.getZoom() >= 17,
        bounds: lmeState.map.getBounds(),
        sourceType
    };
    visitMeasurableLayers(sourceGroup, layer => {
        const categoryKey = sourceType === "imported" ? "imported" : "drawings";
        const objectId = managedLayerId(layer, categoryKey);
        const showSummary = !lmeState.managerHiddenMeasurementSummaryIds.has(objectId);
        const showSides = !lmeState.managerHiddenMeasurementSideIds.has(objectId);
        if (!showSummary && !showSides) {
            return;
        }
        if (context.count >= context.max || !layerIsInView(layer, context.bounds)) {
            return;
        }
        const layerContext = {
            ...context,
            showSummary,
            showSides: context.showSides && showSides
        };
        if (layer instanceof L.Circle) {
            renderCircleMeasurement(layer, targetGroup, layerContext);
        } else if (layer instanceof L.Polygon) {
            renderPolygonMeasurement(layer, targetGroup, layerContext);
        } else if (layer instanceof L.Polyline) {
            renderPolylineMeasurement(layer, targetGroup, layerContext);
        }
    });
}

function visitMeasurableLayers(layer, visitor) {
    if (layer instanceof L.Circle || layer instanceof L.Polygon || layer instanceof L.Polyline) {
        visitor(layer);
        return;
    }
    if (typeof layer.eachLayer === "function") {
        layer.eachLayer(child => visitMeasurableLayers(child, visitor));
    }
}

function layerIsInView(layer, mapBounds) {
    if (typeof layer.getBounds === "function") {
        const bounds = layer.getBounds();
        return !bounds.isValid || !bounds.isValid() || bounds.intersects(mapBounds);
    }
    if (typeof layer.getLatLng === "function") {
        return mapBounds.contains(layer.getLatLng());
    }
    return true;
}

function renderCircleMeasurement(layer, targetGroup, context) {
    if (!context.showSummary) {
        return;
    }
    const radius = layer.getRadius();
    const area = Math.PI * radius * radius;
    const circumference = 2 * Math.PI * radius;
    addMeasurementLabel(
        targetGroup,
        layer.getLatLng(),
        `S: ${formatArea(area)}<br>R: ${formatDistance(radius)} · C: ${formatDistance(circumference)}`,
        "summary",
        context);
}

function renderPolygonMeasurement(layer, targetGroup, context) {
    const polygons = polygonLatLngGroups(layer.getLatLngs());
    let area = 0;
    let perimeter = 0;
    polygons.forEach(rings => {
        rings.forEach((ring, index) => {
            const ringArea = Math.abs(L.GeometryUtil.geodesicArea(ring));
            area += index === 0 ? ringArea : -ringArea;
            perimeter += latLngPathLength(ring, true);
            if (context.showSides) {
                addSegmentLabels(ring, true, targetGroup, context);
            }
        });
    });
    const center = typeof layer.getCenter === "function"
        ? layer.getCenter()
        : layer.getBounds().getCenter();
    if (context.showSummary) {
        addMeasurementLabel(
            targetGroup,
            center,
            `S: ${formatArea(Math.max(0, area))}<br>P: ${formatDistance(perimeter)}`,
            "summary",
            context);
    }
}

function renderPolylineMeasurement(layer, targetGroup, context) {
    const lines = lineLatLngGroups(layer.getLatLngs());
    const length = lines.reduce((total, line) => total + latLngPathLength(line, false), 0);
    if (context.showSides) {
        lines.forEach(line => addSegmentLabels(line, false, targetGroup, context));
    }
    const longest = lines.reduce((current, line) => line.length > current.length ? line : current, []);
    if (context.showSummary && longest.length) {
        addMeasurementLabel(
            targetGroup,
            longest[Math.floor(longest.length / 2)],
            `L: ${formatDistance(length)}`,
            "summary",
            context);
    }
}

function polygonLatLngGroups(latLngs) {
    if (!Array.isArray(latLngs) || !latLngs.length) {
        return [];
    }
    if (isLatLng(latLngs[0])) {
        return [[latLngs]];
    }
    if (Array.isArray(latLngs[0]) && isLatLng(latLngs[0][0])) {
        return [latLngs];
    }
    return latLngs.flatMap(polygonLatLngGroups);
}

function lineLatLngGroups(latLngs) {
    if (!Array.isArray(latLngs) || !latLngs.length) {
        return [];
    }
    if (isLatLng(latLngs[0])) {
        return [latLngs];
    }
    return latLngs.flatMap(lineLatLngGroups);
}

function isLatLng(value) {
    return value && Number.isFinite(value.lat) && Number.isFinite(value.lng);
}

function latLngPathLength(points, closed) {
    if (points.length < 2) {
        return 0;
    }
    let total = 0;
    for (let index = 1; index < points.length; index += 1) {
        total += lmeState.map.distance(points[index - 1], points[index]);
    }
    if (closed && !points[0].equals(points[points.length - 1])) {
        total += lmeState.map.distance(points[points.length - 1], points[0]);
    }
    return total;
}

function addSegmentLabels(points, closed, targetGroup, context) {
    if (points.length < 2) {
        return;
    }
    const segmentCount = closed ? points.length : points.length - 1;
    for (let index = 0; index < segmentCount && context.count < context.max; index += 1) {
        const start = points[index];
        const end = points[(index + 1) % points.length];
        if (start.equals(end)) {
            continue;
        }
        addMeasurementLabel(
            targetGroup,
            L.latLng((start.lat + end.lat) / 2, (start.lng + end.lng) / 2),
            formatDistance(lmeState.map.distance(start, end)),
            "side",
            context);
    }
}

function addMeasurementLabel(targetGroup, latLng, html, labelType, context) {
    if (context.count >= context.max) {
        return;
    }
    L.marker(latLng, {
        pane: context.sourceType === "drawing" ? "drawingsPane" : "importedPane",
        interactive: false,
        keyboard: false,
        icon: L.divIcon({
            className: `lme-measure-label ${context.sourceType} ${labelType}`,
            html: `<span>${html}</span>`,
            iconSize: null
        })
    }).addTo(targetGroup).lmeManagerLabel = html.replace(/<[^>]+>/g, "");
    context.count += 1;
}

function formatDistance(meters) {
    if (meters >= 1000) {
        return `${formatNumber(meters / 1000, 3)} km`;
    }
    return `${formatNumber(meters, meters < 100 ? 1 : 0)} m`;
}

function formatArea(squareMeters) {
    if (squareMeters >= 10000) {
        return `${formatNumber(squareMeters / 10000, 4)} ha`;
    }
    return `${formatNumber(squareMeters, squareMeters < 100 ? 1 : 0)} m²`;
}

function formatNumber(value, digits) {
    return new Intl.NumberFormat("it-IT", {
        minimumFractionDigits: 0,
        maximumFractionDigits: digits
    }).format(value);
}

function createMapExportGeoJson(options) {
    migrateMisclassifiedImportedSheets();
    const requested = options || {};
    const features = [];

    if (requested.includeImported !== false) {
        appendExportFeatures(features, managedGroupGeoJson(lmeState.imported, "imported"), "imported");
    }
    if (requested.includeImportedSheets !== false) {
        appendExportFeatures(features, managedGroupGeoJson(lmeState.importedSheets, "importedSheets"), "imported-sheet");
    }
    if (requested.includeCadastral !== false) {
        appendExportFeatures(features, managedGroupGeoJson(lmeState.selectedParcelsLayer, "selectedParcels"), "cadastral");
        appendExportFeatures(features, managedGroupGeoJson(lmeState.gpsParcelLayer, "gpsParcels"), "cadastral-gps");
    }

    const drawings = managedGroupGeoJson(lmeState.drawings, "drawings");
    if (requested.includeDrawings !== false) {
        appendExportFeatures(features, drawings, "drawing", feature => !isPoiFeature(feature));
    }
    if (requested.includePoi !== false) {
        appendExportFeatures(features, drawings, "poi", isPoiFeature);
    }
    if (requested.includeTrail !== false && lmeState.gpsTrailPoints.length >= 2) {
        features.push({
            type: "Feature",
            properties: { name: "Traccia GPS", _lmeCategory: "gps-trail" },
            geometry: {
                type: "LineString",
                coordinates: lmeState.gpsTrailPoints.map(point => [
                    Number(point.lng ?? point[1]),
                    Number(point.lat ?? point[0])
                ])
            }
        });
    }

    const exported = requested.selectedOnly
        ? features.filter(feature => lmeState.managerSelectedObjectIds.has(feature?.properties?._lmeManagerId))
        : features;
    return JSON.stringify({ type: "FeatureCollection", features: exported });
}

function appendExportFeatures(target, collection, category, predicate = () => true) {
    for (const sourceFeature of collection?.features || []) {
        if (!sourceFeature?.geometry || !predicate(sourceFeature)) {
            continue;
        }
        const feature = JSON.parse(JSON.stringify(sourceFeature));
        feature.properties = { ...(feature.properties || {}), _lmeCategory: category };
        if (feature.properties._lmeShape === "circle"
            && feature.geometry.type === "Point"
            && Number(feature.properties._lmeRadius) > 0) {
            feature.geometry = circleToPolygon(feature.geometry.coordinates, Number(feature.properties._lmeRadius));
        }
        target.push(feature);
    }
}

function isPoiFeature(feature) {
    return feature?.geometry?.type === "Point"
        && feature?.properties?._lmeShape !== "circle";
}

function circleToPolygon(center, radiusMeters) {
    const longitude = Number(center?.[0]);
    const latitude = Number(center?.[1]);
    const earthRadius = 6378137;
    const latitudeRadians = latitude * Math.PI / 180;
    const ring = [];
    for (let index = 0; index <= 64; index += 1) {
        const angle = index / 64 * Math.PI * 2;
        const north = Math.sin(angle) * radiusMeters;
        const east = Math.cos(angle) * radiusMeters;
        ring.push([
            longitude + east / (earthRadius * Math.cos(latitudeRadians)) * 180 / Math.PI,
            latitude + north / earthRadius * 180 / Math.PI
        ]);
    }
    return { type: "Polygon", coordinates: [ring] };
}

function createProjectSnapshot(includeCadastralParcels) {
    const center = lmeState.map.getCenter();
    return JSON.stringify({
        schemaVersion: 5,
        view: {
            latitude: center.lat,
            longitude: center.lng,
            zoom: lmeState.map.getZoom()
        },
        drawings: managedGroupGeoJson(lmeState.drawings, "drawings"),
        imported: managedGroupGeoJson(lmeState.imported, "imported"),
        importedSheets: managedGroupGeoJson(lmeState.importedSheets, "importedSheets"),
        importedSheetsVisible: lmeState.importedSheetsVisible,
        displayOptions: captureDisplayOptions(),
        selectedParcels: includeCadastralParcels
            ? managedGroupGeoJson(lmeState.selectedParcelsLayer, "selectedParcels")
            : { type: "FeatureCollection", features: [] },
        trail: lmeState.gpsTrailPoints.map(point => [
            Number(point.lat ?? point[0]),
            Number(point.lng ?? point[1])
        ]),
        trailStartedAt: lmeState.gpsTrailStartedAt,
        auditLog: [...lmeState.auditLog]
    });
}

function getLegacyProjectSnapshot() {
    return localStorage.getItem("lmeMapWorkspace");
}

function clearLegacyProjectSnapshot() {
    localStorage.removeItem("lmeMapWorkspace");
}

function loadProjectSnapshot(raw, projectName) {
    try {
        const data = typeof raw === "string" ? JSON.parse(raw) : raw;
        if (!data || typeof data !== "object") {
            throw new Error("contenuto non valido");
        }

        resetLayerManagerProjectState();
        lmeState.drawings.clearLayers();
        lmeState.imported.clearLayers();
        lmeState.importedSheets.clearLayers();
        lmeState.drawingMeasurements.clearLayers();
        lmeState.importedMeasurements.clearLayers();
        lmeState.selectedParcelsLayer.clearLayers();
        lmeState.gpsParcelLayer.clearLayers();

        const restoredDrawings = L.geoJSON(data.drawings || emptyFeatureCollection(), {
            pane: "drawingsPane",
            style: storedFeatureStyle,
            pointToLayer: (feature, latlng) => {
                const properties = feature?.properties || {};
                if (properties._lmeShape === "circle" && Number(properties._lmeRadius) > 0) {
                    return L.circle(latlng, {
                        pane: "drawingsPane",
                        renderer: lmeState.drawingsRenderer,
                        radius: Number(properties._lmeRadius),
                        color: "#f97316",
                        weight: 3,
                        fillColor: "#fb923c",
                        fillOpacity: 0.2
                    });
                }
                return L.marker(latlng, { pane: "drawingsPane", draggable: false });
            },
            onEachFeature: (feature, layer) => {
                bindStoredFeaturePopup(feature, layer);
                annotateDrawingLayer(layer, feature?.properties?._lmeShape);
                applyStyleFromProperties(layer);
            }
        });
        restoredDrawings.eachLayer(layer => lmeState.drawings.addLayer(layer));
        const importedParts = partitionStoredImportedFeatures(
            data.imported || emptyFeatureCollection(),
            data.importedSheets || emptyFeatureCollection());
        addImportedFeatures(importedParts.parcels);
        addImportedSheetFeatures(importedParts.sheets);
        const projectDisplayOptions = data.schemaVersion >= 3 && data.displayOptions
            ? data.displayOptions
            : null;
        lmeState.importedSheetsVisible = projectDisplayOptions
            ? Boolean(projectDisplayOptions.importedSheetsVisible)
            : data.schemaVersion >= 2 && Boolean(data.importedSheetsVisible);
        if (lmeState.importedSheetsVisible) {
            ensureImportedSheetOutline();
        }
        applyImportedSheetVisibility();
        L.geoJSON(data.selectedParcels || emptyFeatureCollection(), {
            pane: "selectedParcelsPane",
            style: { color: "#ef4444", weight: 4, opacity: 1, fillColor: "#fbbf24", fillOpacity: 0.26 },
            onEachFeature: (feature, layer) => {
                const properties = feature?.properties || {};
                const reference = properties.NATIONALCADASTRALREFERENCE
                    || properties.INSPIREID_LOCALID
                    || properties.LABEL
                    || "Particella catastale";
                layer.lmeParcelReference = reference;
                layer.bindPopup(`<strong>${escapeHtml(reference)}</strong>`);
            }
        }).addTo(lmeState.selectedParcelsLayer);

        lmeState.gpsTrailPoints = Array.isArray(data.trail) ? data.trail : [];
        lmeState.gpsTrailStartedAt = data.trailStartedAt || null;
        lmeState.auditLog = Array.isArray(data.auditLog) ? data.auditLog.slice(-250) : [];
        lmeState.gpsTrail.setLatLngs(lmeState.gpsTrailPoints);
        if (projectDisplayOptions) {
            applyProjectDisplayOptions(projectDisplayOptions);
        }
        refreshImportedMeasurements();
        refreshDrawingMeasurements();
        refreshPermanentLabels();

        const projectLayerList = [
            lmeState.drawings,
            lmeState.imported,
            lmeState.selectedParcelsLayer,
            lmeState.gpsTrail
        ];
        if (lmeState.importedSheetsVisible) {
            projectLayerList.push(lmeState.importedSheets);
        }
        const projectLayers = L.featureGroup(projectLayerList);
        if (projectLayers.getBounds().isValid()) {
            fitLayer(projectLayers);
        } else if (Number.isFinite(data.view?.latitude)
            && Number.isFinite(data.view?.longitude)
            && Number.isFinite(data.view?.zoom)) {
            lmeState.map.setView([data.view.latitude, data.view.longitude], data.view.zoom);
        }

        const parcelCount = lmeState.selectedParcelsLayer.toGeoJSON().features?.length || 0;
        setText("parcelState", parcelCount
            ? `${parcelCount} particelle del progetto`
            : "Nessuna particella selezionata");
        updateGpsInsideState();
        const hiddenSheets = importedParts.sheets.features.length && !lmeState.importedSheetsVisible
            ? ` ${importedParts.sheets.features.length} elementi del foglio sono nascosti.`
            : "";
        setInfo(`Progetto caricato: ${projectName || "senza nome"}.${hiddenSheets}`);
        refreshLayerManager();
        if (!lmeState.historyBusy) {
            lmeState.isDirty = false;
            lmeState.undoStack = [];
            lmeState.redoStack = [];
            void lmeState.dotNetReference?.invokeMethodAsync("OnProjectSaved");
        }
        return captureDisplayOptions();
    } catch (error) {
        setInfo(`Progetto non leggibile: ${error.message}`);
        throw error;
    }
}

function captureDisplayOptions() {
    return {
        baseLayer: lmeState.currentBaseName,
        cadastreOpacity: lmeState.cadastreOpacity,
        cadastreLayers: [...lmeState.cadastreLayers],
        includeKmlSheetLayer: lmeState.includeKmlSheetLayer,
        importedVisible: lmeState.importedVisible,
        importedSheetsVisible: lmeState.importedSheetsVisible,
        showImportedMeasurements: lmeState.showImportedMeasurements,
        showDrawingMeasurements: lmeState.showDrawingMeasurements,
        drawToolsVisible: Boolean(lmeState.drawControl),
        gpsPositionVisible: lmeState.gpsPositionVisible,
        selectedParcelsVisible: lmeState.selectedParcelsVisible,
        layerOrder: [...lmeState.layerOrder],
        layerObjectOrder: { ...lmeState.managerObjectOrder },
        layerCategoryNames: { ...lmeState.managerCategoryNames },
        removedLayerCategories: [...lmeState.managerRemovedCategories],
        hiddenLayerObjects: [...lmeState.managerHiddenObjectIds],
        hiddenLayerMeasurementSummaries: [...lmeState.managerHiddenMeasurementSummaryIds],
        hiddenLayerMeasurementSides: [...lmeState.managerHiddenMeasurementSideIds],
        hiddenLayerCategories: [...lmeState.managerHiddenCategories],
        trailEnabled: lmeState.gpsTrailEnabled
    };
}

function applyProjectDisplayOptions(options) {
    const supportedCadastreLayers = new Set([
        "CP.CadastralParcel",
        "codice_plla",
        "CP.CadastralZoning",
        "fabbricati",
        "strade",
        "acque"
    ]);
    if (Array.isArray(options.cadastreLayers)) {
        lmeState.cadastreLayers = options.cadastreLayers.filter(layer => supportedCadastreLayers.has(layer));
    }

    const opacity = Number(options.cadastreOpacity);
    if (Number.isFinite(opacity)) {
        lmeState.cadastreOpacity = Math.max(0, Math.min(1, opacity));
    }
    lmeState.includeKmlSheetLayer = Boolean(options.includeKmlSheetLayer);
    lmeState.importedVisible = options.importedVisible !== false;
    lmeState.importedSheetsVisible = Boolean(options.importedSheetsVisible);
    lmeState.showImportedMeasurements = Boolean(options.showImportedMeasurements);
    lmeState.showDrawingMeasurements = options.showDrawingMeasurements !== false;
    if (Array.isArray(options.layerOrder)) {
        setLayerOrder(options.layerOrder);
    }
    if (options.layerObjectOrder && typeof options.layerObjectOrder === "object") {
        lmeState.managerObjectOrder = options.layerObjectOrder;
    }
    if (options.layerCategoryNames && typeof options.layerCategoryNames === "object") {
        lmeState.managerCategoryNames = { ...options.layerCategoryNames };
    }
    if (Array.isArray(options.removedLayerCategories)) {
        lmeState.managerRemovedCategories = new Set(options.removedLayerCategories);
    }
    if (Array.isArray(options.hiddenLayerObjects)) {
        lmeState.managerHiddenObjectIds = new Set(options.hiddenLayerObjects);
    }
    if (Array.isArray(options.hiddenLayerMeasurementSummaries)) {
        lmeState.managerHiddenMeasurementSummaryIds = new Set(options.hiddenLayerMeasurementSummaries);
    }
    if (Array.isArray(options.hiddenLayerMeasurementSides)) {
        lmeState.managerHiddenMeasurementSideIds = new Set(options.hiddenLayerMeasurementSides);
    }
    if (Array.isArray(options.hiddenLayerCategories)) {
        lmeState.managerHiddenCategories = new Set(options.hiddenLayerCategories);
    }
    applyImportedSheetVisibility();
    setImportedLayerVisible(lmeState.importedVisible);
    refreshCadastreLayer();

    if (typeof options.baseLayer === "string") {
        setBaseLayer(options.baseLayer);
    }
    setGpsPositionVisible(options.gpsPositionVisible !== false);
    setSelectedParcelsVisible(options.selectedParcelsVisible !== false);
    toggleTrail(Boolean(options.trailEnabled));
    setDrawToolsVisible(Boolean(options.drawToolsVisible));
    applyStoredLayerManagerVisibility();
    saveLayerManagerState();
}

function partitionStoredImportedFeatures(imported, storedSheets) {
    const parcelFeatures = [];
    const sheetFeatures = [...(storedSheets?.features || [])];
    const sourceGroups = new Map();

    (imported?.features || []).forEach(feature => {
        if (isSheetOrOverlayFeature(feature)) {
            sheetFeatures.push(feature);
            return;
        }
        const source = String(feature?.properties?._lmeSource || "");
        if (!/\.(kml|kmz)$/i.test(source)) {
            parcelFeatures.push(feature);
            return;
        }
        const group = sourceGroups.get(source) || [];
        group.push(feature);
        sourceGroups.set(source, group);
    });

    sourceGroups.forEach(features => {
        const polygonParts = splitKmlPolygonFeatures(features);
        const parcels = filterKmlParcelFeatures(polygonParts);
        const parcelSet = new Set(parcels);
        parcelFeatures.push(...parcels);
        sheetFeatures.push(...polygonParts.filter(feature => !parcelSet.has(feature)));
        sheetFeatures.push(...features.filter(feature => geometryPolygons(feature.geometry).length === 0));
    });

    return {
        parcels: { type: "FeatureCollection", features: parcelFeatures },
        sheets: { type: "FeatureCollection", features: sheetFeatures }
    };
}

function emptyFeatureCollection() {
    return { type: "FeatureCollection", features: [] };
}

function managedGroupGeoJson(group, categoryKey) {
    const collection = group?.toGeoJSON?.() || emptyFeatureCollection();
    const features = [...(collection.features || [])];
    const existingIds = new Set(features.map(feature => feature?.properties?._lmeManagerId).filter(Boolean));
    lmeState.managerHiddenObjects.forEach(record => {
        if (record.categoryKey !== categoryKey) {
            return;
        }
        const hidden = record.layer?.toGeoJSON?.();
        const hiddenFeatures = hidden?.type === "FeatureCollection" ? hidden.features : hidden ? [hidden] : [];
        hiddenFeatures.forEach(feature => {
            const id = feature?.properties?._lmeManagerId;
            if (!id || !existingIds.has(id)) {
                features.push(feature);
                if (id) {
                    existingIds.add(id);
                }
            }
        });
    });
    const categoryName = lmeState.managerCategoryNames[categoryKey];
    if (categoryName) {
        features.forEach(feature => {
            feature.properties = { ...(feature.properties || {}), _lmeCategoryName: categoryName };
        });
    }
    return { type: "FeatureCollection", features };
}

function resetLayerManagerProjectState() {
    drawingEditToolbar()?.disable?.();
    lmeState.drawingSelection?.clearLayers();
    lmeState.managerHiddenObjects.clear();
    lmeState.managerHiddenObjectIds.clear();
    lmeState.managerHiddenMeasurementSummaryIds.clear();
    lmeState.managerHiddenMeasurementSideIds.clear();
    lmeState.managerHiddenCategories.clear();
    lmeState.managerRemovedCategories.clear();
    lmeState.managerObjectOrder = {};
    lmeState.managerCategoryNames = {};
    lmeState.managerSelectedObjectIds.clear();
    lmeState.permanentLabels?.clearLayers();
    clearManagerHighlight();
}

function clearManagedCategoryState(categoryKey) {
    const category = layerManagerCategories().find(item => item.key === categoryKey);
    if (category) {
        managedRecordsForCategory(category).forEach(record => {
            lmeState.managerHiddenMeasurementSummaryIds.delete(record.id);
            lmeState.managerHiddenMeasurementSideIds.delete(record.id);
        });
    }
    [...lmeState.managerHiddenObjects.entries()].forEach(([id, record]) => {
        if (record.categoryKey === categoryKey) {
            lmeState.managerHiddenObjects.delete(id);
            lmeState.managerHiddenObjectIds.delete(id);
        }
    });
    lmeState.managerHiddenCategories.delete(categoryKey);
    delete lmeState.managerObjectOrder[categoryKey];
}

function bindStoredFeaturePopup(feature, layer) {
    updateStoredFeaturePopup(layer, feature?.properties);
}

function updateStoredFeaturePopup(layer, sourceProperties) {
    const properties = sourceProperties || layer?.feature?.properties || {};
    const label = properties.name || properties.Name || properties.label || properties.LABEL;
    const notes = String(properties._lmeNotes || "").trim();
    const photo = String(properties._lmePhoto || "");
    if (label || notes || photo) {
        const image = photo.startsWith("data:image/") ? `<img class="lme-popup-photo" src="${photo}" alt="Foto allegata">` : "";
        layer.bindPopup(`${label ? `<strong>${escapeHtml(label)}</strong>` : ""}${notes ? `<p>${escapeHtml(notes)}</p>` : ""}${image}`);
        return;
    }
    if (typeof layer?.unbindPopup === "function") {
        layer.unbindPopup();
    }
}

function offlineDatabase() {
    if (lmeState.offlineDbPromise) return lmeState.offlineDbPromise;
    lmeState.offlineDbPromise = new Promise((resolve, reject) => {
        const request = indexedDB.open("lmeOfflineMaps", 1);
        request.onupgradeneeded = () => request.result.createObjectStore("tiles", { keyPath: "key" });
        request.onsuccess = () => resolve(request.result);
        request.onerror = () => reject(request.error);
    });
    return lmeState.offlineDbPromise;
}

async function offlineTileGet(key) {
    const db = await offlineDatabase();
    return new Promise((resolve, reject) => {
        const request = db.transaction("tiles", "readonly").objectStore("tiles").get(key);
        request.onsuccess = () => resolve(request.result || null);
        request.onerror = () => reject(request.error);
    });
}

async function offlineTilePut(value) {
    const db = await offlineDatabase();
    return new Promise((resolve, reject) => {
        const request = db.transaction("tiles", "readwrite").objectStore("tiles").put(value);
        request.onsuccess = () => resolve();
        request.onerror = () => reject(request.error);
    });
}

function createOfflineTileLayer() {
    const layer = L.gridLayer({ attribution: "Tessere salvate offline", maxZoom: 22 });
    layer.createTile = (coords, done) => {
        const tile = document.createElement("img");
        tile.alt = "";
        tile.className = "lme-offline-image-tile";
        offlineTileGet(`${coords.z}/${coords.x}/${coords.y}`).then(record => {
            if (!record?.blob) {
                tile.className = "lme-offline-tile";
                done(null, tile);
                return;
            }
            const url = URL.createObjectURL(record.blob);
            tile.onload = () => { URL.revokeObjectURL(url); done(null, tile); };
            tile.onerror = error => { URL.revokeObjectURL(url); done(error, tile); };
            tile.src = url;
        }).catch(error => done(error, tile));
        return tile;
    };
    return layer;
}

function offlineSourceUrl(provider, z, x, y) {
    const urls = {
        osm: `https://a.tile.openstreetmap.org/${z}/${x}/${y}.png`,
        satellite: `https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/${z}/${y}/${x}`,
        topographic: `https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/${z}/${y}/${x}`,
        "streets-esri": `https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/${z}/${y}/${x}`,
        terrain: `https://a.tile.opentopomap.org/${z}/${x}/${y}.png`,
        carto: `https://a.basemaps.cartocdn.com/rastertiles/voyager/${z}/${x}/${y}.png`
    };
    return urls[provider] || null;
}

function longitudeToTileX(longitude, zoom) {
    return Math.floor((longitude + 180) / 360 * 2 ** zoom);
}

function latitudeToTileY(latitude, zoom) {
    const value = Math.max(-85.0511, Math.min(85.0511, latitude)) * Math.PI / 180;
    return Math.floor((1 - Math.log(Math.tan(value) + 1 / Math.cos(value)) / Math.PI) / 2 * 2 ** zoom);
}

async function downloadOfflineArea(extraZoomLevels = 2) {
    const provider = lmeState.currentBaseName;
    if (!offlineSourceUrl(provider, 0, 0, 0)) {
        throw new Error("Per il download offline usa prima uno sfondo Esri, OpenStreetMap, OpenTopoMap o CARTO.");
    }
    const bounds = lmeState.map.getBounds();
    const startZoom = Math.max(1, lmeState.map.getZoom());
    const endZoom = Math.min(19, startZoom + Math.max(0, Math.min(4, Number(extraZoomLevels) || 0)));
    const tiles = [];
    for (let z = startZoom; z <= endZoom; z++) {
        const max = 2 ** z - 1;
        const x1 = Math.max(0, Math.min(max, longitudeToTileX(bounds.getWest(), z)));
        const x2 = Math.max(0, Math.min(max, longitudeToTileX(bounds.getEast(), z)));
        const y1 = Math.max(0, Math.min(max, latitudeToTileY(bounds.getNorth(), z)));
        const y2 = Math.max(0, Math.min(max, latitudeToTileY(bounds.getSouth(), z)));
        for (let x = Math.min(x1, x2); x <= Math.max(x1, x2); x++) {
            for (let y = Math.min(y1, y2); y <= Math.max(y1, y2); y++) tiles.push({ z, x, y });
        }
    }
    if (tiles.length > 600) throw new Error(`Area troppo ampia (${tiles.length} tessere). Aumenta lo zoom o riduci la zona visibile.`);
    let saved = 0;
    for (const tile of tiles) {
        const key = `${tile.z}/${tile.x}/${tile.y}`;
        if (await offlineTileGet(key)) { saved++; continue; }
        const response = await fetch(offlineSourceUrl(provider, tile.z, tile.x, tile.y), { mode: "cors" });
        if (!response.ok) continue;
        await offlineTilePut({ key, blob: await response.blob(), provider, savedAt: new Date().toISOString() });
        saved++;
        if (saved % 10 === 0) setInfo(`Mappe offline: ${saved}/${tiles.length} tessere salvate...`);
    }
    lmeState.offlineTileCount = await getOfflineTileStats();
    lmeState.baseLayers.offline.redraw();
    setInfo(`Area offline pronta: ${saved} tessere, zoom ${startZoom}-${endZoom}.`);
    return { saved, requested: tiles.length, startZoom, endZoom };
}

async function getOfflineTileStats() {
    const db = await offlineDatabase();
    return new Promise((resolve, reject) => {
        const request = db.transaction("tiles", "readonly").objectStore("tiles").count();
        request.onsuccess = () => resolve(request.result || 0);
        request.onerror = () => reject(request.error);
    });
}

async function clearOfflineTiles() {
    const db = await offlineDatabase();
    await new Promise((resolve, reject) => {
        const request = db.transaction("tiles", "readwrite").objectStore("tiles").clear();
        request.onsuccess = () => resolve();
        request.onerror = () => reject(request.error);
    });
    lmeState.offlineTileCount = 0;
    lmeState.baseLayers.offline.redraw();
    setInfo("Archivio mappe offline svuotato.");
    return true;
}

function setBaseLayer(name) {
    const selected = lmeState.baseLayers[name] || lmeState.baseLayers.satellite;
    if (lmeState.currentBase) {
        lmeState.map.removeLayer(lmeState.currentBase);
    }
    lmeState.currentBase = selected.addTo(lmeState.map);
    lmeState.currentBaseName = selected === lmeState.baseLayers[name] ? name : "satellite";
    lmeState.currentBase.bringToBack();
    const labels = {
        satellite: "Satellite Esri",
        osm: "OpenStreetMap",
        "streets-esri": "Strade dettagliate Esri",
        topographic: "Topografica Esri",
        terrain: "OpenTopoMap",
        carto: "CARTO Voyager",
        offline: "Mappe salvate offline",
        "azure-road": "Strade Azure Maps",
        "azure-satellite": "Satellite Azure Maps",
        "google-satellite": "Satellite Google Maps",
        "google-roadmap": "Strade Google Maps"
    };
    setInfo(`Sfondo attivo: ${labels[name] || labels.satellite}. Il catasto AdE resta sovrapposto.`);
    if (lmeState.currentBaseName.startsWith("azure-")) {
        void updateAzureAttribution();
    } else {
        clearAzureAttribution();
    }
}

function configureGoogleMaps(apiKey) {
    const key = (apiKey || "").trim();
    if (!key) {
        return Promise.reject(new Error("Chiave Google Maps mancante."));
    }

    if (window.google?.maps && L.gridLayer.googleMutant) {
        createGoogleLayers();
        return Promise.resolve();
    }

    if (lmeState.googleMapsLoading) {
        return lmeState.googleMapsLoading;
    }

    lmeState.googleMapsLoading = new Promise((resolve, reject) => {
        const callbackName = `lmeGoogleMapsReady${Date.now()}`;
        const script = document.createElement("script");
        window[callbackName] = () => {
            delete window[callbackName];
            createGoogleLayers();
            resolve();
        };
        script.src = `https://maps.googleapis.com/maps/api/js?key=${encodeURIComponent(key)}&loading=async&callback=${callbackName}`;
        script.async = true;
        script.onerror = () => {
            delete window[callbackName];
            lmeState.googleMapsLoading = null;
            reject(new Error("Impossibile caricare Google Maps. Controlla chiave, API e connessione."));
        };
        document.head.appendChild(script);
    });

    return lmeState.googleMapsLoading;
}

function createGoogleLayers() {
    if (!L.gridLayer.googleMutant) {
        throw new Error("Modulo Google Maps non disponibile.");
    }

    lmeState.baseLayers["google-satellite"] ||= L.gridLayer.googleMutant({ type: "hybrid", maxZoom: 22 });
    lmeState.baseLayers["google-roadmap"] ||= L.gridLayer.googleMutant({ type: "roadmap", maxZoom: 22 });
}

function configureAzureMaps(subscriptionKey) {
    const key = (subscriptionKey || "").trim();
    if (!key) {
        throw new Error("Chiave Azure Maps mancante.");
    }
    if (lmeState.azureMapsKey === key
        && lmeState.baseLayers["azure-road"]
        && lmeState.baseLayers["azure-satellite"]) {
        return;
    }

    const activeAzureLayer = lmeState.currentBaseName.startsWith("azure-")
        ? lmeState.currentBaseName
        : null;
    if (activeAzureLayer && lmeState.currentBase) {
        lmeState.map.removeLayer(lmeState.currentBase);
    }

    lmeState.azureMapsKey = key;
    lmeState.baseLayers["azure-road"] = createAzureLayer(key, "microsoft.base.road", 22);
    lmeState.baseLayers["azure-satellite"] = createAzureLayer(key, "microsoft.imagery", 19);

    if (activeAzureLayer) {
        lmeState.currentBase = lmeState.baseLayers[activeAzureLayer].addTo(lmeState.map);
        lmeState.currentBase.bringToBack();
        void updateAzureAttribution();
    }
}

function clearAzureMaps() {
    if (lmeState.currentBaseName.startsWith("azure-") && lmeState.currentBase) {
        lmeState.map.removeLayer(lmeState.currentBase);
        lmeState.currentBase = lmeState.baseLayers.satellite.addTo(lmeState.map);
        lmeState.currentBase.bringToBack();
        lmeState.currentBaseName = "satellite";
    }

    delete lmeState.baseLayers["azure-road"];
    delete lmeState.baseLayers["azure-satellite"];
    lmeState.azureMapsKey = null;
    clearAzureAttribution();
}

function createAzureLayer(key, tilesetId, maxNativeZoom) {
    const url = `https://atlas.microsoft.com/map/tile?api-version=2024-04-01&tilesetId=${tilesetId}&zoom={z}&x={x}&y={y}&tileSize=256&language=it-IT&view=Auto&subscription-key=${encodeURIComponent(key)}`;
    const layer = L.tileLayer(url, {
        minZoom: tilesetId === "microsoft.imagery" ? 1 : 0,
        maxNativeZoom,
        maxZoom: 22,
        attribution: "Microsoft Azure Maps"
    });
    let errorShown = false;
    layer.on("tileerror", () => {
        if (!errorShown) {
            errorShown = true;
            setInfo("Azure Maps non ha restituito le tessere. Controlla quota e permessi Render della chiave.");
        }
    });
    return layer;
}

async function updateAzureAttribution() {
    if (!lmeState.azureMapsKey || !lmeState.currentBaseName.startsWith("azure-")) {
        return;
    }

    const requestedLayer = lmeState.currentBaseName;
    const tilesetId = requestedLayer === "azure-satellite" ? "microsoft.imagery" : "microsoft.base.road";
    const bounds = lmeState.map.getBounds();
    const zoom = Math.min(lmeState.map.getZoom(), tilesetId === "microsoft.imagery" ? 19 : 22);
    const bbox = [bounds.getWest(), bounds.getSouth(), bounds.getEast(), bounds.getNorth()].join(",");
    const url = `https://atlas.microsoft.com/map/attribution?api-version=2024-04-01&tilesetId=${tilesetId}&zoom=${zoom}&bounds=${bbox}`;

    try {
        const response = await fetch(url, {
            headers: {
                Accept: "application/json",
                "subscription-key": lmeState.azureMapsKey
            }
        });
        if (!response.ok) {
            return;
        }
        const payload = await response.json();
        if (lmeState.currentBaseName !== requestedLayer) {
            return;
        }

        const attribution = [...new Set((payload.copyrights || []).map(htmlToText).filter(Boolean))].join(" | ");
        setAzureAttribution(attribution);
    } catch {
        clearAzureAttribution();
    }
}

function setAzureAttribution(text) {
    clearAzureAttribution();
    if (!text) {
        return;
    }
    lmeState.azureAttribution = escapeHtml(text);
}

function clearAzureAttribution() {
    lmeState.azureAttribution = null;
}

function htmlToText(value) {
    const element = document.createElement("div");
    element.innerHTML = String(value || "");
    return element.textContent?.trim() || "";
}

function setCadastreOpacity(value) {
    const opacity = Number(value);
    if (!Number.isFinite(opacity)) {
        return;
    }
    lmeState.cadastreOpacity = Math.max(0, Math.min(1, opacity));
    if (lmeState.cadastre) {
        lmeState.cadastre.setOpacity(lmeState.cadastreOpacity);
    }
}

function toggleCadastreLayer(layer, enabled) {
    const exists = lmeState.cadastreLayers.includes(layer);
    if (enabled && !exists) {
        lmeState.cadastreLayers.push(layer);
    }
    if (!enabled && exists) {
        lmeState.cadastreLayers = lmeState.cadastreLayers.filter(item => item !== layer);
    }
    refreshCadastreLayer();
    const layerNames = {
        "CP.CadastralParcel": "Confini particelle",
        codice_plla: "Numeri particelle",
        "CP.CadastralZoning": "Fogli catastali",
        fabbricati: "Fabbricati",
        strade: "Strade catastali",
        acque: "Acque"
    };
    if (enabled && layer === "codice_plla" && lmeState.map.getZoom() < 17) {
        setInfo("Numeri particelle attivati. Ingrandisci la mappa almeno fino a zoom 17 per renderli visibili.");
        return;
    }
    setInfo(`${layerNames[layer] || layer}: ${enabled ? "attivo" : "nascosto"}.`);
}

function refreshCadastreLayer() {
    if (lmeState.cadastre) {
        lmeState.map.removeLayer(lmeState.cadastre);
    }

    const layers = activeCadastreLayers();
    lmeState.cadastre = null;
    if (!layers.length) {
        return;
    }

    const cadastreLayer = L.tileLayer.wms(cadastreUrl(), {
        pane: "cadastrePane",
        layers: layers.join(","),
        format: "image/png",
        transparent: true,
        version: "1.1.1",
        crs: cadastreCrs,
        maxZoom: 22,
        opacity: lmeState.cadastreOpacity,
        attribution: "Agenzia delle Entrate - CC BY 4.0"
    });

    let errorShown = false;
    cadastreLayer.on("tileerror", () => {
        if (errorShown) {
            return;
        }

        errorShown = true;
        setInfo("Layer catastali non caricati dal servizio AdE. Controlla la connessione e riprova.");
    });
    cadastreLayer.on("load", () => {
        errorShown = false;
    });

    lmeState.cadastre = cadastreLayer.addTo(lmeState.map);
}

function activeCadastreLayers() {
    const drawOrder = [
        "CP.CadastralZoning",
        "strade",
        "acque",
        "fabbricati",
        "CP.CadastralParcel",
        "codice_plla"
    ];
    return drawOrder.filter(layer => lmeState.cadastreLayers.includes(layer));
}

function clearSelectedParcels() {
    const count = managedGroupGeoJson(lmeState.selectedParcelsLayer, "selectedParcels").features.length;
    if (count) rememberMapChange();
    lmeState.selectedParcelsLayer.clearLayers();
    clearManagedCategoryState("selectedParcels");
    updateGpsInsideState();
    setInfo(count ? `${count} particelle selezionate rimosse.` : "Non ci sono particelle selezionate da rimuovere.");
    refreshLayerManager();
    if (count) finishMapChange();
}

function setSelectedParcelsVisible(enabled) {
    lmeState.selectedParcelsVisible = Boolean(enabled);
    if (!lmeState.map || !lmeState.selectedParcelsLayer) {
        return;
    }

    if (lmeState.selectedParcelsVisible) {
        if (!lmeState.map.hasLayer(lmeState.selectedParcelsLayer)) {
            lmeState.selectedParcelsLayer.addTo(lmeState.map);
        }
        lmeState.selectedParcelsLayer.bringToFront();
        const count = lmeState.selectedParcelsLayer.toGeoJSON().features?.length || 0;
        setInfo(count
            ? `${count} particelle selezionate visibili.`
            : "Nessuna particella selezionata da mostrare.");
        return;
    }

    if (lmeState.map.hasLayer(lmeState.selectedParcelsLayer)) {
        lmeState.map.removeLayer(lmeState.selectedParcelsLayer);
    }
    setInfo("Particelle selezionate nascoste; i dati restano nel progetto.");
}

function clearMapElements() {
    const count = managedGroupGeoJson(lmeState.selectedParcelsLayer, "selectedParcels").features.length
        + managedGroupGeoJson(lmeState.gpsParcelLayer, "gpsParcels").features.length
        + managedGroupGeoJson(lmeState.imported, "imported").features.length
        + managedGroupGeoJson(lmeState.importedSheets, "importedSheets").features.length
        + managedGroupGeoJson(lmeState.drawings, "drawings").features.length
        + lmeState.gpsTrailPoints.length;
    if (!count) {
        setInfo("La mappa non contiene elementi da pulire.");
        return;
    }
    if (!window.confirm("Rimuovere particelle evidenziate, file importati, disegni, POI e traccia GPS dalla mappa?")) {
        return;
    }

    rememberMapChange();
    resetLayerManagerProjectState();
    lmeState.selectedParcelsLayer.clearLayers();
    lmeState.gpsParcelLayer.clearLayers();
    lmeState.imported.clearLayers();
    lmeState.importedSheets.clearLayers();
    lmeState.drawings.clearLayers();
    lmeState.importedMeasurements.clearLayers();
    lmeState.drawingMeasurements.clearLayers();
    lmeState.gpsTrailPoints = [];
    lmeState.gpsTrail.setLatLngs([]);
    updateGpsInsideState();
    setInfo("Elementi della mappa rimossi. Sfondo e layer catastali restano attivi.");
    refreshLayerManager();
    finishMapChange();
}

function startGps() {
    if (!navigator.geolocation) {
        setInfo("Geolocalizzazione non disponibile sul dispositivo.");
        setText("gpsState", "GPS non disponibile");
        return;
    }

    if (lmeState.gpsWatchId !== null) {
        setInfo("Tracking GPS gia attivo.");
        return;
    }

    lmeState.gpsWatchId = navigator.geolocation.watchPosition(onGpsPosition, onGpsError, {
        enableHighAccuracy: true,
        maximumAge: 1000,
        timeout: 15000
    });
    setText("gpsState", "Aggancio GPS in corso...");
    setInfo("Tracking GPS avviato.");
}

function stopGps() {
    if (lmeState.gpsWatchId !== null) {
        navigator.geolocation.clearWatch(lmeState.gpsWatchId);
        lmeState.gpsWatchId = null;
    }
    setText("gpsState", "GPS fermo");
    setInfo("Tracking GPS fermato.");
}

function setNativeGpsPosition(location) {
    onGpsPosition({
        coords: {
            latitude: location.latitude,
            longitude: location.longitude,
            accuracy: location.accuracy || 0,
            altitude: location.altitude,
            heading: location.course,
            speed: location.speed
        },
        timestamp: location.timestamp
    });
}

function setGpsPositionVisible(enabled) {
    lmeState.gpsPositionVisible = Boolean(enabled);
    if (!lmeState.gpsPositionVisible) {
        if (lmeState.gpsMarker && lmeState.map.hasLayer(lmeState.gpsMarker)) {
            lmeState.map.removeLayer(lmeState.gpsMarker);
        }
        if (lmeState.gpsAccuracy && lmeState.map.hasLayer(lmeState.gpsAccuracy)) {
            lmeState.map.removeLayer(lmeState.gpsAccuracy);
        }
        setInfo("Punto e cerchio GPS nascosti. Il rilevamento continua.");
        return;
    }

    if (lmeState.hasLiveGpsFix && lmeState.lastPosition) {
        updateGpsPositionLayers(lmeState.lastPosition, lmeState.lastAccuracy);
    }
    setInfo("Punto e cerchio GPS visibili.");
}

function setGpsError(error) {
    setText("gpsState", "GPS non disponibile");
    setInfo(error || "Errore GPS.");
}

function centerOnGps() {
    if (!lmeState.lastPosition) {
        setInfo("Nessuna posizione GPS ancora disponibile.");
        return;
    }
    lmeState.map.setView(lmeState.lastPosition, Math.max(lmeState.map.getZoom(), 19));
}

function toggleTrail(enabled) {
    lmeState.gpsTrailEnabled = enabled;
    if (enabled && !lmeState.gpsTrailStartedAt) lmeState.gpsTrailStartedAt = new Date().toISOString();
    setInfo(enabled ? "Registrazione percorso avviata." : "Registrazione percorso in pausa.");
}

function clearGpsTrail() {
    if (!lmeState.gpsTrailPoints.length) { setInfo("La traccia GPS e' vuota."); return false; }
    if (!window.confirm("Eliminare definitivamente la traccia GPS corrente?")) return false;
    rememberMapChange();
    lmeState.gpsTrailPoints = [];
    lmeState.gpsTrail.setLatLngs([]);
    lmeState.gpsTrailStartedAt = null;
    finishMapChange("Eliminazione traccia GPS");
    setInfo("Traccia GPS eliminata.");
    return true;
}

function getGpsTrailStats() {
    const length = lmeState.gpsTrailPoints.reduce((sum, point, index) => index ? sum + lmeState.map.distance(lmeState.gpsTrailPoints[index - 1], point) : 0, 0);
    const durationSeconds = lmeState.gpsTrailStartedAt ? Math.max(0, Math.round((Date.now() - new Date(lmeState.gpsTrailStartedAt).getTime()) / 1000)) : 0;
    return { points: lmeState.gpsTrailPoints.length, length, durationSeconds, recording: lmeState.gpsTrailEnabled };
}

function onGpsPosition(position) {
    const { latitude, longitude, accuracy } = position.coords;
    const latlng = [latitude, longitude];
    lmeState.lastPosition = latlng;
    lmeState.lastAccuracy = Math.max(0, Number(accuracy) || 0);
    const firstLiveFix = !lmeState.hasLiveGpsFix;
    lmeState.hasLiveGpsFix = true;
    updateGpsPositionLayers(latlng, lmeState.lastAccuracy);
    if (firstLiveFix) {
        lmeState.map.setView(latlng, 19);
    }

    if (lmeState.gpsTrailEnabled) {
        lmeState.gpsTrailPoints.push(latlng);
        lmeState.gpsTrail.setLatLngs(lmeState.gpsTrailPoints);
        if (lmeState.gpsTrailPoints.length % 10 === 0) finishMapChange();
    }

    setText("gpsState", `${latitude.toFixed(6)}, ${longitude.toFixed(6)} - precisione ${Math.round(lmeState.lastAccuracy)} m`);
    updateGpsInsideState();
}

function updateGpsPositionLayers(latlng, accuracy) {
    let created = false;
    if (!lmeState.gpsMarker) {
        lmeState.gpsMarker = L.marker(latlng, { pane: "gpsPositionPane", title: "La tua posizione" });
        lmeState.gpsMarker.lmeManagerId = "gps-position-marker";
        lmeState.gpsMarker.lmeManagerLabel = "Posizione GPS";
        lmeState.gpsAccuracy = L.circle(latlng, {
            pane: "gpsPositionPane",
            radius: accuracy,
            color: "#2563eb",
            weight: 2,
            fillColor: "#60a5fa",
            fillOpacity: 0.16
        });
        lmeState.gpsAccuracy.lmeManagerId = "gps-accuracy-circle";
        lmeState.gpsAccuracy.lmeManagerLabel = "Cerchio precisione GPS";
        created = true;
    } else {
        lmeState.gpsMarker.setLatLng(latlng);
        lmeState.gpsAccuracy.setLatLng(latlng).setRadius(accuracy);
    }
    const categoryVisible = lmeState.gpsPositionVisible
        && !lmeState.managerHiddenCategories.has("gpsPosition");
    if (categoryVisible
        && !lmeState.managerHiddenObjectIds.has("gps-position-marker")
        && !lmeState.map.hasLayer(lmeState.gpsMarker)) {
        lmeState.gpsMarker.addTo(lmeState.map);
    } else if ((!categoryVisible || lmeState.managerHiddenObjectIds.has("gps-position-marker"))
        && lmeState.map.hasLayer(lmeState.gpsMarker)) {
        lmeState.map.removeLayer(lmeState.gpsMarker);
    }
    if (categoryVisible
        && !lmeState.managerHiddenObjectIds.has("gps-accuracy-circle")
        && !lmeState.map.hasLayer(lmeState.gpsAccuracy)) {
        lmeState.gpsAccuracy.addTo(lmeState.map);
    } else if ((!categoryVisible || lmeState.managerHiddenObjectIds.has("gps-accuracy-circle"))
        && lmeState.map.hasLayer(lmeState.gpsAccuracy)) {
        lmeState.map.removeLayer(lmeState.gpsAccuracy);
    }
    if (created) {
        refreshLayerManager();
    }
}

function onGpsError(error) {
    setText("gpsState", "GPS non autorizzato o non disponibile");
    setInfo(error.message || "Errore GPS.");
}

function updateGpsInsideState() {
    if (!lmeState.lastPosition) {
        return;
    }

    const point = [lmeState.lastPosition[1], lmeState.lastPosition[0]];
    updateGpsProximity(point);
    const officialMatch = findContainingPolygon(point, lmeState.selectedParcelsLayer.toGeoJSON())
        || findContainingPolygon(point, lmeState.gpsParcelLayer.toGeoJSON());
    if (officialMatch) {
        const reference = officialMatch.properties?.NATIONALCADASTRALREFERENCE
            || officialMatch.properties?.INSPIREID_LOCALID
            || officialMatch.properties?.LABEL
            || "particella AdE";
        setText("parcelState", `Dentro particella AdE: ${reference}`);
        return;
    }

    const match = findContainingPolygon(point, lmeState.imported.toGeoJSON()) || findContainingPolygon(point, lmeState.drawings.toGeoJSON());

    if (match) {
        const name = match.properties?.name || match.properties?.Name || "area caricata/disegnata";
        setText("parcelState", `Dentro: ${name}`);
        return;
    }

    setText(
        "parcelState",
        lmeState.selectedParcelsLayer.getLayers().length || lmeState.gpsParcelLayer.getLayers().length
            ? "Fuori dalla particella catastale evidenziata"
            : "Fuori dai poligoni caricati");
}

function updateGpsProximity(coordinates) {
    if (!lmeState.gpsProximityEnabled || !window.turf) return;
    const record = lmeState.managerRecords?.get(lmeState.managerHighlightedObjectId)
        || [...lmeState.managerSelectedObjectIds].map(id => lmeState.managerRecords?.get(id)).find(Boolean);
    if (!record?.layer) return;
    try {
        const feature = record.layer.toGeoJSON();
        const boundary = feature.geometry.type.includes("Polygon") ? turf.polygonToLine(feature) : feature;
        const lines = boundary.type === "FeatureCollection" ? boundary.features : [boundary];
        let nearest = null;
        lines.forEach(line => {
            const candidate = line.geometry.type.includes("Line") ? turf.nearestPointOnLine(line, turf.point(coordinates), { units: "meters" }) : null;
            if (candidate && (!nearest || candidate.properties.dist < nearest.properties.dist)) nearest = candidate;
        });
        if (!nearest) return;
        const distance = nearest.properties.dist;
        const bearing = turf.bearing(turf.point(coordinates), nearest);
        const direction = bearingToCardinal(bearing);
        const inside = feature.geometry.type.includes("Polygon") && turf.booleanPointInPolygon(turf.point(coordinates), feature);
        setText("gpsState", `${coordinates[1].toFixed(6)}, ${coordinates[0].toFixed(6)} - bordo ${formatDistance(distance)} ${direction}`);
        if (lmeState.gpsBoundaryAlertEnabled && lmeState.lastBoundaryState !== null && inside !== lmeState.lastBoundaryState) {
            navigator.vibrate?.([180, 100, 180]);
            setInfo(inside ? "Ingresso nell'area selezionata." : "Uscita dall'area selezionata.");
        }
        lmeState.lastBoundaryState = inside;
    } catch { }
}

function bearingToCardinal(value) {
    const labels = ["N", "NE", "E", "SE", "S", "SO", "O", "NO"];
    return labels[Math.round(((value % 360) + 360) % 360 / 45) % 8];
}

function saveGpsMeasurementPoint() {
    if (!lmeState.lastPosition) { setInfo("Attendi una posizione GPS valida."); return; }
    rememberMapChange();
    const now = new Date();
    addDrawingFeature({ type: "Feature", properties: {
        name: `Rilievo GPS ${now.toLocaleString("it-IT")}`,
        _lmeAccuracy: lmeState.lastAccuracy,
        _lmeMeasuredAt: now.toISOString(),
        _lmeNotes: `Precisione dichiarata: ${Math.round(lmeState.lastAccuracy)} m`
    }, geometry: { type: "Point", coordinates: [lmeState.lastPosition[1], lmeState.lastPosition[0]] } }, true);
    refreshLayerManager(); finishMapChange(); setInfo("Punto GPS salvato con precisione, data e ora.");
}

function gmlParcelsToGeoJson(xmlText) {
    const xml = new DOMParser().parseFromString(xmlText, "text/xml");
    const members = Array.from(xml.getElementsByTagNameNS("*", "member"));
    const features = members.map(member => parcelMemberToFeature(member)).filter(Boolean);
    return { type: "FeatureCollection", features };
}

function parcelMemberToFeature(member) {
    const posList = member.getElementsByTagNameNS("*", "posList")[0]?.textContent?.trim();
    if (!posList) {
        return null;
    }

    const values = posList.split(/\s+/).map(Number).filter(value => !Number.isNaN(value));
    const ring = [];
    for (let index = 0; index < values.length; index += 2) {
        ring.push([values[index + 1], values[index]]);
    }

    const properties = {};
    ["INSPIREID_LOCALID", "INSPIREID_NAMESPACE", "LABEL", "NATIONALCADASTRALREFERENCE", "ADMINISTRATIVEUNIT"].forEach(name => {
        const value = member.getElementsByTagNameNS("*", name)[0]?.textContent;
        if (value) {
            properties[name] = value;
        }
    });

    return {
        type: "Feature",
        properties,
        geometry: {
            type: "Polygon",
            coordinates: [ring]
        }
    };
}

function findContainingPolygon(point, geojson) {
    const features = geojson?.features || [];
    return features.find(feature => feature.geometry && geometryContainsPoint(feature.geometry, point));
}

function geometryContainsPoint(geometry, point) {
    if (geometry.type === "Polygon") {
        return polygonContainsPoint(geometry.coordinates, point);
    }
    if (geometry.type === "MultiPolygon") {
        return geometry.coordinates.some(polygon => polygonContainsPoint(polygon, point));
    }
    if (geometry.type === "GeometryCollection") {
        return geometry.geometries.some(item => geometryContainsPoint(item, point));
    }
    return false;
}

function polygonContainsPoint(rings, point) {
    if (!rings.length || !ringContainsPoint(rings[0], point)) {
        return false;
    }
    return !rings.slice(1).some(ring => ringContainsPoint(ring, point));
}

function ringContainsPoint(ring, point) {
    const [x, y] = point;
    let inside = false;
    for (let i = 0, j = ring.length - 1; i < ring.length; j = i++) {
        const xi = ring[i][0], yi = ring[i][1];
        const xj = ring[j][0], yj = ring[j][1];
        const intersect = ((yi > y) !== (yj > y)) && (x < ((xj - xi) * (y - yi)) / (yj - yi) + xi);
        if (intersect) {
            inside = !inside;
        }
    }
    return inside;
}

async function queryFeatureInfo(latlng) {
    if (!lmeState.cadastreLayers.includes("CP.CadastralParcel")) {
        return "";
    }

    const point = lmeState.map.latLngToContainerPoint(latlng, lmeState.map.getZoom());
    const size = lmeState.map.getSize();
    const bbox = lmeState.map.getBounds();
    const wmsBbox = `${bbox.getSouth()},${bbox.getWest()},${bbox.getNorth()},${bbox.getEast()}`;
    const url = `${cadastreUrl()}service=WMS&version=1.3.0&request=GetFeatureInfo&layers=CP.CadastralParcel&query_layers=CP.CadastralParcel&styles=&crs=EPSG:4258&bbox=${wmsBbox}&width=${size.x}&height=${size.y}&i=${Math.round(point.x)}&j=${Math.round(point.y)}&info_format=text/html`;

    try {
        const response = await fetch(url);
        const text = await response.text();
        return text.includes("<body") ? text : escapeHtml(text);
    } catch {
        return "";
    }
}

function fitLayer(layer) {
    try {
        const bounds = layer.getBounds();
        if (bounds.isValid()) {
            lmeState.map.fitBounds(bounds.pad(0.15));
        }
    } catch {
        setInfo("Nessuna geometria da inquadrare.");
    }
}

function cadastreUrl() {
    return "https://wms.cartografia.agenziaentrate.gov.it/inspire/wms/ows01.php?language=ita&";
}

function setInfo(text) {
    setText("mapInfo", text);
}

function setText(id, text) {
    const element = document.getElementById(id);
    if (element) {
        element.textContent = text;
    }
}

function escapeHtml(value) {
    return String(value)
        .replaceAll("&", "&amp;")
        .replaceAll("<", "&lt;")
        .replaceAll(">", "&gt;")
        .replaceAll('"', "&quot;")
        .replaceAll("'", "&#039;");
}