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  */
  /**
   * @class ClusterManager
   * @file Takes a set of clusters and displays them
   * @author Daniel Reynolds
   * @dependencies autoQuery.js
   * @notes Work in progress!
   */
  
  import ClusterState from "./cluster-helpers/clusterState";
  import Util from "../library/apertureUtil";
  
  export default class ClusterManager {
      constructor(data, map, layerGroup, linkedGeometry) {
          this.data = data;
          this.map = map;
          this.layerGroup = layerGroup;
          this.geohashCache = [];
          this.clusters = [];
          this.linked = linkedGeometry;
          this.backgroundLoader = this.linked === "tract_geo_140mb_no_2d_index" ? window.backgroundTract : window.backgroundCounty;
          this.queryLinkedGeometry = this.queryLinkedGeometry.bind(this);
  
          if(document.getElementById("model-container").style.display = "block") 
              document.getElementById("clusterLegend").style.display = "block";
          this.configurateClusters();
  
          this.currentClusterSelected = null;
      }
  
      clear(){ //basically a destructor
          map.removeEventListener("moveend", this.queryLinkedGeometry);
          document.getElementById("clusterLegend").style.display = "none";
          for(const cluster of this.clusters){
              cluster.render.removeAllFeaturesFromMap();
          }
      }
  
      queryLinkedGeometry(){
          const sessionID = Math.random().toString(36).substring(2, 6);
          this.backgroundLoader.postMessage({
              type: "query",
              senderID: sessionID,
              bounds: this.map.getBounds(),
              blacklist: this.geohashCache
          });
          let relevantData = [];
          const responseListener = msg => {
              const data = msg.data;
              //check that the data is sent from this querier
              if (data.senderID !== sessionID)
                  return;
              if (data.type === "data") {
                  //populate records & cache with no duplicates
                  relevantData = this.addToExistingFeaturesNoDuplicates(relevantData, data.data.data);
                  this.geohashCache = [...new Set([...data.data.geohashes, ...this.geohashCache])];
                  if (relevantData.length > 100) {
                      this.linkedGeometryUpdates(relevantData);
                      relevantData = [];
                  }
              }
              else if (data.type === "end") {
                  //close the listener
                  this.backgroundLoader.removeEventListener("message", responseListener);
                  if (relevantData.length)
                      this.linkedGeometryUpdates(relevantData);
                  relevantData = [];
              }
          }
          this.backgroundLoader.addEventListener("message", responseListener)
      }
  
      addToExistingFeaturesNoDuplicates(existingFeatures, newFeatures) {
          const newFeaturesNoDuplicates = newFeatures.filter(nFeature => {
              return !existingFeatures.find(eFeature => eFeature.GISJOIN === nFeature.GISJOIN)
          });
          return existingFeatures.concat(newFeaturesNoDuplicates)
      }
  
      linkedGeometryUpdates(featureList) {
          for (const feature of featureList) {
              const cluster = this.getClusterFromGISJOIN(feature.GISJOIN);
              if (cluster) {
                  cluster.render.renderGeoJson(feature, {
                      "Cluster": {
                          color: cluster.color,
                          border: 0,
                          opacity: 0.4,
                          popup: `${Util.capitalizeString(cluster.color)} cluster`
                      }
                  });
              }
          }
      }
  
      configurateClusters() {
          this.removeAllLayers();
          this.clusters = [];
          const colors = ["#e6194B", "#f58231", "#ffe119", "#bfef45", "#3cb44b", "#42d4f4", "#4363d8", "#911eb4", "#f032e6", "#a9a9a9"];
          let buckets = [];
          for(let i = 0; i <= this.getMaxPrediction(); i++){
              buckets.push([]);
          }
          for (const d of this.data){
              buckets[d.prediction].push(d.gisJoin);
          }
          let j = 0;
  
          for (const b of buckets) {
              const cluster = new ClusterState(b, colors[j], this.layerGroup);
              j++;
              this.clusters.push(cluster);
  
              //this is just cluster legend code (the thing at the bottom with the colors)
              const legendClick = document.createElement("div");
              legendClick.className = "clusterLegendField";
              legendClick.style.backgroundColor = colors[j - 1];
              legendClick.onclick = function () {
                  if(this.currentClusterSelected) this.currentClusterSelected.style.filter = "";
                  if(this.currentClusterSelected === legendClick){
                       this.reAddLayers();
                       this.currentClusterSelected = null;
                       return;
                  }
                  this.currentClusterSelected = legendClick;
                  legendClick.style.filter = "brightness(0.4)";
                  this.reAddLayers();
                  this.removeAllLayersApartFrom(cluster.group);
              }.bind(this)
              document.getElementById("clusterLegend").appendChild(legendClick);
          }
          map.addEventListener("moveend", this.queryLinkedGeometry);
          this.queryLinkedGeometry();
      }
  
      getMaxPrediction(){
          let max = 0;
          for(const result of this.data){
              if(result.prediction > max)
                  max = result.prediction;
          }
          return max;
      }
  
      getClusterFromGISJOIN(GISJOIN) {
          for (const cluster of this.clusters) {
              if (cluster.clusterHasGISJOIN(GISJOIN))
                  return cluster;
          }
          return null;
      }
  
      removeAllLayers() {
          for (const cluster of this.clusters) {
              this.layerGroup.removeLayer(cluster.group);
          }
          document.getElementById("clusterLegend").innerHTML = "";
      }
  
      removeAllLayersApartFrom(layer) {
          for (const cluster of this.clusters) {
              if (cluster.group !== layer) {
                  this.layerGroup.removeLayer(cluster.group);
              }
          }
      }
  
      reAddLayers() {
          this.removeAllLayersApartFrom(null);
          for (const cluster of this.clusters) {
              this.layerGroup.addLayer(cluster.group);
          }
      }
  }