// public/js/map/photos/photoSource.js
// ==================================
// MAPBOX PHOTO SOURCE
// ==================================

(() => {
  "use strict";

  let mapboxMap = null;

  const SOURCE_ID = "photos";

  const SOURCE_OPTIONS = {
    cluster: true,
    clusterRadius: 80,
  };

  // ==================================
  // SET MAP
  // ==================================

  function setMap(map) {
    mapboxMap = map;
  }

  // ==================================
  // SOURCE ESISTENTE
  // ==================================

  function getSource() {
    if (!mapboxMap) {
      return null;
    }

    return mapboxMap.getSource(SOURCE_ID);
  }

  // ==================================
  // CREA SOURCE
  // ==================================

  function createSource(features = []) {
    if (!mapboxMap) {
      return null;
    }

    if (!mapboxMap.isStyleLoaded()) {
      return null;
    }

    const existingSource = getSource();

    if (existingSource) {
      return existingSource;
    }

    const data = {
      type: "FeatureCollection",
      features,
    };

    console.log("[PhotoSource] creo source", {
      features: features.length,
    });

    mapboxMap.addSource(SOURCE_ID, {
      type: "geojson",
      data,
      ...SOURCE_OPTIONS,
    });

    return getSource();
  }

  // ==================================
  // UPDATE DATA
  // ==================================

  function setData(features = []) {
    if (!mapboxMap) {
      return;
    }

    if (!mapboxMap.isStyleLoaded()) {
      return;
    }

    const data = {
      type: "FeatureCollection",
      features,
    };

    const source = getSource();

    if (source) {
      console.log("[PhotoSource] aggiorno source", {
        features: features.length,
      });

      source.setData(data);

      return;
    }

    createSource(features);
  }

  // ==================================
  // GET CLUSTER LEAVES
  // ==================================

  function getClusterLeaves(
    clusterId,
    limit = 100,
    offset = 0,
    callback,
  ) {
    const source = getSource();

    if (!source) {
      console.warn("[PhotoSource] source non presente");
      return;
    }

    source.getClusterLeaves(
      Number(clusterId),
      limit,
      offset,
      callback,
    );
  }

  // ==================================
  // GET EXPANSION ZOOM
  // ==================================

  function getClusterExpansionZoom(clusterId, callback) {
    const source = getSource();

    if (!source) {
      console.warn("[PhotoSource] source non presente");
      return;
    }

    source.getClusterExpansionZoom(
      Number(clusterId),
      callback,
    );
  }

  // ==================================
  // QUERY FOTO
  // ==================================

  function getFeatures() {
    if (!mapboxMap) {
      return [];
    }

    return mapboxMap.querySourceFeatures(SOURCE_ID, {
      filter: ["!", ["has", "point_count"]],
    });
  }

  // ==================================
  // QUERY CLUSTER
  // ==================================

  function getClusters() {
    if (!mapboxMap) {
      return [];
    }

    return mapboxMap.querySourceFeatures(SOURCE_ID, {
      filter: ["has", "point_count"],
    });
  }

  // ==================================
  // DEBUG
  // ==================================

  function debug() {
    const source = getSource();

    if (!source) {
      console.log("[PhotoSource] source photos non presente");
      return;
    }

    console.log("[PhotoSource] debug", {
      source,
      features: source._data?.features?.length,
      photoFeatures: getFeatures().length,
      clusters: getClusters().length,
    });
  }

  // ==================================
  // API PUBBLICA
  // ==================================

  window.MapboxPhotoSource = {
    setMap,
    getSource,
    createSource,
    setData,
    getClusterLeaves,
    getClusterExpansionZoom,
    getFeatures,
    getClusters,
    debug,
  };
})();