// 高德地图工具类
const AMAP_KEY = '4c513a688938fd89b88b296e867f66ec'

class AmapUtil {
  constructor() {
    this.key = AMAP_KEY
  }

  // 逆地理编码 - 根据经纬度获取地址信息
  async regeocode(longitude, latitude) {
    try {
      const res = await uni.request({
        url: 'https://restapi.amap.com/v3/geocode/regeo',
        method: 'GET',
        data: {
          key: this.key,
          location: `${longitude},${latitude}`,
          poitype: '',
          radius: 1000,
          extensions: 'base',
          batch: false,
          roadlevel: 0
        }
      })
      
      if (res.statusCode === 200 && res.data.status === '1') {
        return {
          success: true,
          data: res.data.regeocode
        }
      } else {
        return {
          success: false,
          message: res.data.info || '逆地理编码失败'
        }
      }
    } catch (error) {
      console.error('逆地理编码异常:', error)
      return {
        success: false,
        message: '网络异常'
      }
    }
  }

  // 地理编码 - 根据地址获取经纬度
  async geocode(address, city = '') {
    try {
      const res = await uni.request({
        url: 'https://restapi.amap.com/v3/geocode/geo',
        method: 'GET',
        data: {
          key: this.key,
          address: address,
          city: city
        }
      })
      
      if (res.statusCode === 200 && res.data.status === '1' && res.data.geocodes.length > 0) {
        return {
          success: true,
          data: res.data.geocodes[0]
        }
      } else {
        return {
          success: false,
          message: res.data.info || '地理编码失败'
        }
      }
    } catch (error) {
      console.error('地理编码异常:', error)
      return {
        success: false,
        message: '网络异常'
      }
    }
  }

  // 搜索POI
  async searchPOI(keywords, location = '', radius = 3000, city = '') {
    try {
      const res = await uni.request({
        url: 'https://restapi.amap.com/v3/place/text',
        method: 'GET',
        data: {
          key: this.key,
          keywords: keywords,
          location: location,
          radius: radius,
          city: city,
          citylimit: true
        }
      })
      
      if (res.statusCode === 200 && res.data.status === '1') {
        return {
          success: true,
          data: res.data.pois || []
        }
      } else {
        return {
          success: false,
          message: res.data.info || '搜索失败'
        }
      }
    } catch (error) {
      console.error('POI搜索异常:', error)
      return {
        success: false,
        message: '网络异常'
      }
    }
  }

  // 路径规划
  async getRoute(origin, destination, strategy = 0) {
    try {
      const res = await uni.request({
        url: 'https://restapi.amap.com/v3/direction/driving',
        method: 'GET',
        data: {
          key: this.key,
          origin: origin,
          destination: destination,
          strategy: strategy,
          extensions: 'base'
        }
      })
      
      if (res.statusCode === 200 && res.data.status === '1') {
        return {
          success: true,
          data: res.data.route
        }
      } else {
        return {
          success: false,
          message: res.data.info || '路径规划失败'
        }
      }
    } catch (error) {
      console.error('路径规划异常:', error)
      return {
        success: false,
        message: '网络异常'
      }
    }
  }

  // 计算两点间距离
  calculateDistance(lat1, lng1, lat2, lng2) {
    const radLat1 = lat1 * Math.PI / 180.0
    const radLat2 = lat2 * Math.PI / 180.0
    const a = radLat1 - radLat2
    const b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0
    let s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)))
    s = s * 6378.137
    s = Math.round(s * 10000) / 10000
    return s
  }
}

export default new AmapUtil()