import { ref, toRefs } from 'vue';
import AMapLoader from '@amap/amap-jsapi-loader';
import { message } from 'ant-design-vue';

interface EnhancedAMapOptions {
  key?: string;
  version?: string;
  plugins?: string[];
  securityJsCode?: string;
}

interface MapInstance {
  AMap: any;
  map: AMap.Map | null;
}

// 全局单例变量
let globalAMap: any = null;
let globalMap: AMap.Map | null = null;
let isInitialized = false;
let initPromise: Promise<MapInstance> | null = null;
const currentObj = ref({
  currentAdcode: '',
  currentAddress: '',
});
const lnglat = ref<number[]>([]);

export function useAMapEnhanced(options: EnhancedAMapOptions = {}) {
  const isLoading = ref(false);
  const error = ref<string | null>(null);
  // 默认配置
  const defaultOptions: EnhancedAMapOptions = {
    key: import.meta.env.VITE_MAPKEY || '',
    version: '2.0',
    plugins: ['AMap.PlaceSearch', 'AMap.Geolocation'],
    securityJsCode: 'cbbb175f5c77d9ddf74c9b7d37f52f1c',
  };

  // 合并配置
  const mergedOptions = { ...defaultOptions, ...options };

  // 设置安全密钥
  if (mergedOptions.securityJsCode) {
    window._AMapSecurityConfig = {
      securityJsCode: mergedOptions.securityJsCode,
    };
  }

  /**
   * 初始化地图（全局单例）
   * @param container 地图容器ID或元素
   * @param mapOptions 地图配置选项
   */
  const initMap = async (container: string | HTMLElement, mapOptions: AMap.MapOptions = {}): Promise<MapInstance> => {
    // 如果已经在初始化中，则返回该Promise
    if (initPromise) {
      await initPromise;
      return {
        AMap: globalAMap,
        map: globalMap,
      };
    }

    // 如果已经初始化完成，直接返回
    if (isInitialized) {
      return {
        AMap: globalAMap,
        map: globalMap,
      };
    }

    // 检查是否提供了key
    if (!mergedOptions.key) {
      error.value = '缺少高德地图key';
      throw new Error('Missing AMap key');
    }

    isLoading.value = true;
    error.value = null;

    // 创建初始化Promise
    initPromise = new Promise(async (resolve, reject) => {
      try {
        // 加载AMap API
        const loadedAMap = await AMapLoader.load({
          key: mergedOptions.key!,
          version: mergedOptions.version || '2.0',
          plugins: mergedOptions.plugins,
        });

        globalAMap = loadedAMap;

        // 默认地图配置
        const defaultMapOptions: AMap.MapOptions = {
          zoom: 11, // 默认缩放级别
          ...mapOptions,
        };

        // 创建地图实例
        globalMap = new globalAMap.Map(container, defaultMapOptions);

        isInitialized = true;
        resolve({
          AMap: globalAMap,
          map: globalMap,
        });
      } catch (err: any) {
        error.value = err.message || '地图加载失败';
        reject(err);
      } finally {
        isLoading.value = false;
        initPromise = null;
      }
    });

    return initPromise;
  };

  /**
   * 搜索POI并定位到结果
   * @param keyword 搜索关键词
   */
  const searchAndLocate = async (keyword: string): Promise<void> => {
    if (!globalAMap || !globalMap) {
      throw new Error('地图未初始化');
    }

    return new Promise((resolve, reject) => {
      globalAMap.plugin(['AMap.PlaceSearch'], () => {
        const placeSearch = new globalAMap.PlaceSearch({
          pageSize: 10,
          pageIndex: 1,
          autoFitView: true,
        });

        placeSearch.search(keyword, (status: string, result: any) => {
          if (status === 'complete' && result.poiList && result.poiList.pois.length > 0) {
            const firstPoi = result.poiList.pois[0];
            if (firstPoi.location) {
              globalMap?.setCenter(firstPoi.location);
              globalMap?.setZoom(18);

              // // 添加标记点
              // const marker = new globalAMap.Marker({
              //   position: firstPoi.location,
              //   title: firstPoi.name,
              // });
              // globalMap?.add(marker);
            }
            resolve(firstPoi);
          } else {
            reject(new Error('未找到相关地点'));
          }
        });
      });
    });
  };

  /**
   * 根据城市码定位地图
   * @param cityCode 城市编码
   */
  const setCityByCode = async (cityCode: string): Promise<void> => {
    if (!globalAMap || !globalMap) {
      throw new Error('地图未初始化');
    }

    return new Promise((resolve, reject) => {
      globalMap?.setCity(cityCode, (result) => {
        if (result) {
          resolve(result);
        } else {
          reject(new Error('设置城市失败'));
        }
      });
    });
  };
  /**
   * 获取当前位置
   */
  const getCurrentPosition = async (): Promise<any> => {
    if (!globalAMap) {
      throw new Error('AMap未加载');
    }

    return new Promise((resolve, reject) => {
      globalAMap.plugin(['AMap.Geolocation'], () => {
        const geolocation = new globalAMap.Geolocation({
          enableHighAccuracy: true,
          timeout: 10000,
        });

        geolocation.getCurrentPosition((status: string, result: any) => {
          if (status === 'complete') {
            // 定位到当前位置
            getAddressByLngLat(result.position.lng, result.position.lat);
            if (result.position) {
              globalMap?.setCenter(result.position);
              globalMap?.setZoom(18);
            }
            resolve(result);
          } else {
            reject(result);
          }
        });
      });
    });
  };
  /**
   * 通过经纬度获取省市区信息
   * @param longitude 经度
   * @param latitude 纬度
   * @returns 省市区信息
   */
  const getAddressByLngLat = async (longitude: number, latitude: number): Promise<any> => {
    if (!globalAMap) {
      throw new Error('AMap未加载');
    }

    return new Promise((resolve, reject) => {
      globalAMap.plugin(['AMap.Geocoder'], () => {
        const geocoder = new globalAMap.Geocoder({
          city: '全国',
          radius: 1000,
          extensions: 'all',
        });

        lnglat.value = [longitude, latitude];
        geocoder.getAddress(lnglat.value, (status: string, result: any) => {
          if (status === 'complete' && result.regeocode) {
            currentObj.value.currentAddress = result.regeocode.formattedAddress;
            if (result.regeocode.addressComponent) {
              currentObj.value.currentAdcode = result.regeocode.addressComponent.adcode;
            }
            resolve(result.regeocode);
          } else {
            reject(new Error('无法获取地址信息'));
          }
        });
      });
    });
  };

  /**
   * 根据城市码和详细地址精确定位
   * @param cityCode 城市编码
   * @param address 详细地址
   */
  const locateByCityAndAddress = async (cityCode: string, address: string): Promise<any> => {
    if (!globalAMap || !globalMap) {
      throw new Error('地图未初始化');
    }

    // 先根据城市码设置地图城市
    await setCityByCode(cityCode);

    // 然后在指定城市内搜索详细地址
    return new Promise((resolve, reject) => {
      globalAMap.plugin(['AMap.PlaceSearch'], () => {
        const placeSearch = new globalAMap.PlaceSearch({
          city: cityCode,
          citylimit: true,
          pageSize: 10,
          pageIndex: 1,
          autoFitView: true,
        });

        placeSearch.search(address, (status: string, result: any) => {
          if (status === 'complete' && result.poiList && result.poiList.pois.length > 0) {
            const firstPoi = result.poiList.pois[0];
            if (firstPoi.location) {
              globalMap?.setCenter(firstPoi.location);
              globalMap?.setZoom(18);
            }
            resolve(firstPoi);
          } else {
            reject(new Error('未找到相关地点'));
            message.error('该区域下暂无该地点');
          }
        });
      });
    });
  };

  /**
   * 销毁地图
   */
  const destroyMap = () => {
    if (globalMap) {
      globalMap.destroy();
      globalMap = null;
    }
    isInitialized = false;
    initPromise = null;
    currentObj.value.currentAdcode = ''; // 清空adcode数据
    currentObj.value.currentAddress = '';
    lnglat.value = [];
  };

  return {
    // 响应式数据
    isLoading,
    error,
    currentObj,
    lnglat,
    // 方法
    initMap,
    searchAndLocate,
    getCurrentPosition,
    destroyMap,
    setCityByCode,
    locateByCityAndAddress,
    getAddressByLngLat,
    // 提供获取全局地图实例的方法
    getGlobalMap: () => globalMap,
    getGlobalAMap: () => globalAMap,
    isMapInitialized: () => isInitialized,
  };
}