import { Feature, FeatureCollection, MultiPolygon, union } from "@turf/turf";
import EventEmitter from "eventemitter3";
export type PolygonFeatureType = Feature<
  MultiPolygon,
  {
    id: string;
    name: string;
    color?: string;
    active?: boolean;
    [key: string]: any;
  }
>;

class PolygonStore extends EventEmitter {
  features: PolygonFeatureType[] = [];
  constructor() {
    super();
  }

  updateFeature(feature: PolygonFeatureType) {
    this.features.forEach((f, i) => {
      if (f.properties.id == feature.properties.id) {
        this.features[i] = feature;
      }
    });
    this.emit("updateFeature");
  }

  toggleActiveFeature(feature: PolygonFeatureType) {
    this.features.forEach((f) => {
      if (f.properties.id == feature.properties.id) {
        f.properties.active = !f.properties.active;
      }
    });
    this.emit("updateFeature");
  }
  unactiveAllFeature() {
    this.features.forEach((f) => {
      f.properties.active = false;
    });
    this.emit("updateFeature");
  }

  getComboedMultiPolygon() {
    return this.features.reduce((result: PolygonFeatureType, f: PolygonFeatureType) => {
      return union(result, f) as PolygonFeatureType;
    });
    // const multipolygon: FeatureCollection<MultiPolygon> = combine(featureCollection(this.features));
    // return multipolygon.features as PolygonFeatureType;
  }

  reset() {
    this.features = [];
  }
}
export default PolygonStore;