// /hooks/layers/useDynamicDeviceLayers.js
import { useEffect, useRef, useState } from "react";
import L from "leaflet";
import { createAndSetDevices } from "@/utils/devices/createAndSetDevices";
import { checkOverlappingMarkers } from "@/utils/mapUtils";
import plusRoundIcon from "@/components/icons/devices/overlapping/PlusRoundIcon";
import { useSelector } from "react-redux";
import { selectGisStationsStaticDistrict } from "@/redux/slices/webservice/gisStationsStaticDistrictSlice.js";
import { selectGisStationsMeasurements } from "@/redux/slices/webservice/gisStationsMeasurementsSlice.js";
import { selectGisStationsStatusDistrict } from "@/redux/slices/webservice/gisStationsStatusDistrictSlice.js";

/**
 * Dynamisch GIS-System-Marker erstellen & Sichtbarkeit steuern.
 * @param {object} map - Leaflet Map-Instanz
 * @param {Array} GisSystemStatic - Liste der Systeme aus Webservice
 * @param {object} mapLayersVisibility - Redux-Objekt mit Layer-Sichtbarkeiten
 * @param {object} priorityConfig - Konfig für Prioritäten
 * @returns {{ markerStates, layerRefs }} Alle Marker und Referenzen
 */
const useDynamicDeviceLayers = (map, GisSystemStatic, mapLayersVisibility, priorityConfig, oms) => {
  const measurements = useSelector(selectGisStationsMeasurements);
  const staticDistrictData = useSelector(selectGisStationsStaticDistrict);
  const statusDistrict = useSelector(selectGisStationsStatusDistrict);

  const [markerStates, setMarkerStates] = useState({});
  const layerRefs = useRef({});

  // Marker initialisieren (nicht sichtbar machen)
  useEffect(() => {
    if (!map || GisSystemStatic.length === 0) return;

    GisSystemStatic.forEach(({ Name, IdSystem }) => {
      const key = `system-${IdSystem}`;
      // LayerGroup immer komplett neu erstellen, um doppelte Marker zu verhindern
      if (layerRefs.current[key]) {
        if (map.hasLayer(layerRefs.current[key])) {
          map.removeLayer(layerRefs.current[key]);
        }
        layerRefs.current[key].clearLayers();
        delete layerRefs.current[key];
      }
      layerRefs.current[key] = new L.LayerGroup();
      layerRefs.current[key].addTo(map);

      createAndSetDevices(
        IdSystem,
        newMarkers => {
          // Füge neue Marker der LayerGroup hinzu (nur Geräte-Marker)
          if (layerRefs.current[key]) {
            layerRefs.current[key].clearLayers();
            // Nur eindeutige Marker hinzufügen
            const uniqueMarkers = Array.isArray(newMarkers) ? Array.from(new Set(newMarkers)) : [];
            uniqueMarkers.forEach(marker => {
              marker.addTo(layerRefs.current[key]);
            });
          }
          setMarkerStates(prev => ({ ...prev, [key]: newMarkers }));
        },
        GisSystemStatic,
        priorityConfig,
        undefined,
        oms
      );
    });
  }, [map, GisSystemStatic, priorityConfig, staticDistrictData, measurements, statusDistrict]);

  // Sichtbarkeit nach Redux-Status steuern
  useEffect(() => {
    if (!map) return;
    const editMode = localStorage.getItem("editMode") === "true";

    Object.entries(layerRefs.current).forEach(([key, layerGroup]) => {
      const isVisible = mapLayersVisibility[key] ?? true;
      if (editMode || isVisible === false) {
        if (map.hasLayer(layerGroup)) {
          map.removeLayer(layerGroup);
        }
      } else if (isVisible === true) {
        if (!map.hasLayer(layerGroup)) {
          layerGroup.addTo(map);
        }
      }
    });

    // Overlapping-Check bleibt wie gehabt
    const allMarkers = Object.values(markerStates).filter(Array.isArray).flat();
    checkOverlappingMarkers(map, allMarkers, plusRoundIcon);
  }, [map, markerStates, mapLayersVisibility]);

  return { markerStates, layerRefs };
};

export default useDynamicDeviceLayers;