'use strict'

import * as turf from '@turf/turf';
import { deepClone } from '@/common/custom.js'
/*
中国边界数据 来源 阿里-高德
https://datav.aliyun.com/portal/school/atlas/area_selector
*/
import chinaBoundary from './china-boundary.json';
/*
  XDGeoSdk
 */
class XDGeoSdk {

    geoJson = null;
    geoSimpleJson = null;

    chinaPolygon = null;

    chinaAreaBoundary = null;
    chinaAreaMainLandBoundary = null;
    chinaBox = null;
    
    
    static instance = null;
    constructor() {
      this.instance = null
      this.geoJson=chinaBoundary;
      this.chinaAreaBoundary=deepClone(chinaBoundary.features[0].geometry.coordinates);
      this.chinaAreaMainLandBoundary=this.chinaAreaBoundary[0][0];
      this.chinaPolygon = chinaBoundary.features[0].geometry;
      this.chinaBox=turf.bbox(this.chinaPolygon);
      var options = {tolerance: 0.01, highQuality: false};
      this.geoSimpleJson = turf.simplify(this.geoJson, options);

    //   console.log("===>this.chinaPolygon==>",this.chinaPolygon);
    //   console.log("===>geoSimpleJson==>",this.geoSimpleJson);



    }

    static getInstance() {
      if (!this.instance) {
          this.instance = new XDGeoSdk()
      }
      return this.instance
    }

    getChinaGeoJson(){
        return this.geoJson;
        // return this.geoSimpleJson;

    }

    getChinaPolygon(){
        return this.chinaAreaBoundary;
    }

    getChinaMainLandPolygon(){
        return this.chinaAreaMainLandBoundary;
    }

    isInChina(lat,lng) {
        // [minLng, minLat, maxLng, maxLat]
        const bbox = this.chinaBox; 
        const isInBbox = lng >= bbox[0] && lng <= bbox[2] && lat >= bbox[1] && lat <= bbox[3];
        if (!isInBbox) {
            return false;
        }


        const point = turf.point([lng, lat]);
        const chinaPolygon = this.chinaPolygon;
        let rst=turf.booleanPointInPolygon(point, chinaPolygon);
        return rst;
    }
}


export default XDGeoSdk;