/**
 * 地图找店页面
 */
import { View, Text, Map, ScrollView, Image, Input } from '@tarojs/components'
import Taro, { useLoad } from '@tarojs/taro'
import { observer } from 'mobx-react'
import { useState, useRef, useEffect } from 'react'
import { Search, Arrow, Location } from '@taroify/icons'
import './index.scss'

// 模拟门店数据（带经纬度）
const mockStoreData = [
  {
    id: '1',
    name: '北京黑八大师联盟球厅店',
    address: '北京市XXX区XXX街道XXX路19号606',
    latitude: 39.910823,
    longitude: 116.400470,
    price: 16.00,
    billiardCount: 6,
    billiardEmpty: 6,
    chessCount: 2,
    chessEmpty: 2,
    type: '直营店',
    phone: '010-12345678',
    distance: 0,
    distanceText: '0.05km'
  },
  {
    id: '2',
    name: '北京晶彩桌球世界店',
    address: '北京市XXX区XXX街道XXX路XXXXXX大厦101',
    latitude: 39.905823,
    longitude: 116.395470,
    price: 24.00,
    billiardCount: 8,
    billiardEmpty: 8,
    chessCount: 1,
    chessEmpty: 1,
    type: '加盟店',
    phone: '010-87654321',
    distance: 0,
    distanceText: '0.1km'
  },
  {
    id: '3',
    name: '北京飓风台球店',
    address: '北京市XXX区XXX街道106号A01',
    latitude: 39.915823,
    longitude: 116.405470,
    price: 106.00,
    billiardCount: 10,
    billiardEmpty: 10,
    chessCount: 0,
    chessEmpty: 0,
    type: '加盟店',
    phone: '010-11223344',
    distance: 0,
    distanceText: '1.3km'
  },
  {
    id: '4',
    name: '北京星耀台球俱乐部',
    address: '北京市XXX区XXX街道XXX路99号',
    latitude: 39.900823,
    longitude: 116.390470,
    price: 30.00,
    billiardCount: 12,
    billiardEmpty: 10,
    chessCount: 3,
    chessEmpty: 2,
    type: '直营店',
    phone: '010-99887766',
    distance: 0,
    distanceText: '2.3km'
  }
]

interface Store {
  id: string
  name: string
  address: string
  latitude: number
  longitude: number
  price: number
  billiardCount: number
  billiardEmpty: number
  chessCount: number
  chessEmpty: number
  type: string
  phone: string
  distance: number
  distanceText: string
}

interface Marker {
  id: number
  latitude: number
  longitude: number
  iconPath: string
  width: number
  height: number
  callout?: any
  label?: any
}

const MapStorePage = observer(() => {
  // 用户位置（默认北京天安门）
  const [userLocation, setUserLocation] = useState({
    latitude: 39.908823,
    longitude: 116.397470
  })
  
  // 地图中心点（默认跟随用户位置）
  const [mapCenter, setMapCenter] = useState({
    latitude: 39.908823,
    longitude: 116.397470
  })
  
  const [storeList, setStoreList] = useState<Store[]>([])
  const [markers, setMarkers] = useState<Marker[]>([])
  const [activeStoreId, setActiveStoreId] = useState<string | null>(null)
  const [searchValue, setSearchValue] = useState('')
  const [selectedCity, setSelectedCity] = useState('选城市')
  
  const mapContext = useRef<any>(null)

  useLoad(() => {
    // 页面加载时获取用户位置
    requestLocationPermission()
  })

  useEffect(() => {
    // 初始化地图上下文
    mapContext.current = Taro.createMapContext('storeMap')
  }, [])

  // 请求位置权限并获取位置
  const requestLocationPermission = async () => {
    try {
      // 检查权限
      const setting = await Taro.getSetting()
      
      if (!setting.authSetting['scope.userLocation']) {
        // 请求授权
        await Taro.authorize({ scope: 'scope.userLocation' })
      }
      
      // 获取位置
      Taro.showLoading({ title: '定位中...' })
      
      const location = await Taro.getLocation({
        type: 'gcj02', // 返回国测局坐标，适用于微信小程序地图
        isHighAccuracy: true,
        altitude: false
      })
      
      Taro.hideLoading()
      
      const userPos = {
        latitude: location.latitude,
        longitude: location.longitude
      }
      
      setUserLocation(userPos)
      setMapCenter(userPos)
      
      // 获取附近门店（使用模拟数据）
      fetchNearbyStores(userPos.latitude, userPos.longitude)
      
    } catch (error) {
      Taro.hideLoading()
      console.error('获取位置失败:', error)
      
      // 使用默认位置并加载门店
      fetchNearbyStores(userLocation.latitude, userLocation.longitude)
      
      Taro.showModal({
        title: '定位提示',
        content: '未能获取您的位置，将使用默认位置展示门店',
        showCancel: false
      })
    }
  }

  // 获取附近门店（模拟接口）
  const fetchNearbyStores = async (lat: number, lng: number) => {
    try {
      Taro.showLoading({ title: '加载中...' })
      
      // TODO: 替换为真实接口
      // const res = await Taro.request({
      //   url: 'https://your-api.com/api/stores/nearby',
      //   method: 'GET',
      //   data: {
      //     latitude: lat,
      //     longitude: lng,
      //     radius: 10000,
      //     limit: 50
      //   }
      // })
      
      // 模拟网络延迟
      await new Promise(resolve => setTimeout(resolve, 500))
      
      // 使用模拟数据并计算距离
      const storesWithDistance = mockStoreData.map(store => ({
        ...store,
        distance: calculateDistance(lat, lng, store.latitude, store.longitude),
        distanceText: formatDistance(
          calculateDistance(lat, lng, store.latitude, store.longitude)
        )
      }))
      
      // 按距离排序
      storesWithDistance.sort((a, b) => a.distance - b.distance)
      
      setStoreList(storesWithDistance)
      
      // 生成地图标记
      generateMarkers(storesWithDistance)
      
      Taro.hideLoading()
      
    } catch (error) {
      Taro.hideLoading()
      console.error('获取门店失败:', error)
      Taro.showToast({
        title: '获取门店失败',
        icon: 'none'
      })
    }
  }

  // 计算两点之间的距离（米）- Haversine 公式
  const calculateDistance = (
    lat1: number,
    lng1: number,
    lat2: number,
    lng2: number
  ): number => {
    const R = 6371e3 // 地球半径（米）
    const φ1 = (lat1 * Math.PI) / 180
    const φ2 = (lat2 * Math.PI) / 180
    const Δφ = ((lat2 - lat1) * Math.PI) / 180
    const Δλ = ((lng2 - lng1) * Math.PI) / 180

    const a =
      Math.sin(Δφ / 2) * Math.sin(Δφ / 2) +
      Math.cos(φ1) * Math.cos(φ2) * Math.sin(Δλ / 2) * Math.sin(Δλ / 2)

    const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))

    return R * c // 返回米
  }

  // 格式化距离显示
  const formatDistance = (distance: number): string => {
    if (distance < 1000) {
      return `${distance.toFixed(0)}m`
    } else {
      return `${(distance / 1000).toFixed(2)}km`
    }
  }

  // 生成地图标记
  const generateMarkers = (stores: Store[]) => {
    // 使用默认标记图标（微信小程序会提供默认图标）
    // 如果需要自定义图标，准备好图片后替换 iconPath
    const newMarkers: Marker[] = stores.map((store, index) => ({
      id: index,
      latitude: store.latitude,
      longitude: store.longitude,
      iconPath: '', // 空字符串使用默认图标，或指定自定义图标路径
      width: 30,
      height: 30,
      callout: {
        content: store.name,
        color: '#333333',
        fontSize: 12,
        borderRadius: 8,
        bgColor: '#FFFFFF',
        padding: 8,
        display: 'BYCLICK' // 点击标记时显示
      }
    }))

    setMarkers(newMarkers)
  }

  // 点击地图标记
  const handleMarkerTap = (e: any) => {
    const markerIndex = e.detail.markerId
    const store = storeList[markerIndex]
    
    if (store) {
      setActiveStoreId(store.id)
      setMapCenter({
        latitude: store.latitude,
        longitude: store.longitude
      })
    }
  }

  // 点击列表项
  const handleStoreItemClick = (store: Store) => {
    setActiveStoreId(store.id)
    
    // 移动地图到对应位置
    setMapCenter({
      latitude: store.latitude,
      longitude: store.longitude
    })
    
    // 使用 moveToLocation 移动地图（需要 mapContext）
    if (mapContext.current) {
      mapContext.current.moveToLocation({
        latitude: store.latitude,
        longitude: store.longitude
      })
    }
  }

  // 重新定位
  const handleRelocate = () => {
    requestLocationPermission()
  }

  // 导航到门店
  const handleNavigate = (store: Store, e: any) => {
    e.stopPropagation()
    
    Taro.openLocation({
      latitude: store.latitude,
      longitude: store.longitude,
      name: store.name,
      address: store.address,
      scale: 18
    })
  }

  // 搜索门店
  const handleSearch = () => {
    if (!searchValue.trim()) {
      Taro.showToast({
        title: '请输入门店名称或地址',
        icon: 'none'
      })
      return
    }
    
    // TODO: 调用搜索接口
    const filtered = mockStoreData.filter(
      store =>
        store.name.includes(searchValue) || store.address.includes(searchValue)
    )
    
    if (filtered.length > 0) {
      setStoreList(filtered)
      generateMarkers(filtered)
      
      // 移动到第一个搜索结果
      setMapCenter({
        latitude: filtered[0].latitude,
        longitude: filtered[0].longitude
      })
    } else {
      Taro.showToast({
        title: '未找到相关门店',
        icon: 'none'
      })
    }
  }

  return (
    <View className="map-store-page">
      {/* 地图区域 */}
      <Map
        id="storeMap"
        className="map-container"
        longitude={mapCenter.longitude}
        latitude={mapCenter.latitude}
        scale={15}
        markers={markers}
        show-location
        enable-zoom
        enable-scroll
        enable-rotate={false}
        onMarkerTap={handleMarkerTap}
        onError={() => {}}
      />

      {/* 重新定位按钮 */}
      <View className="relocate-btn" onClick={handleRelocate}>
        <Location size={24} color="#333" />
      </View>

      {/* 底部内容区域 */}
      <View className="content-area">
        {/* 筛选区域 */}
        <View className="filter-area">
          <View className="filter-left">
            {/* 城市选择 */}
            <View className="city-select">
              <Text className="city-text">{selectedCity}</Text>
              <Arrow size={16} color="#999999" />
            </View>
            
            {/* 搜索输入框 */}
            <View className="search-input-wrapper">
              <Input
                className="search-input"
                placeholder="搜索门店名称/地址"
                placeholderClass="search-placeholder"
                value={searchValue}
                onInput={(e) => setSearchValue(e.detail.value)}
              />
              <View className="search-icon-btn" onClick={handleSearch}>
                <Search size={18} color="#999999" />
              </View>
            </View>
          </View>
        </View>

        {/* 门店列表 */}
        <View className="list-header">
          <Text className="list-title">附近门店</Text>
          <Text className="list-count">共 {storeList.length} 家</Text>
        </View>

        <ScrollView scrollY className="store-list">
          {storeList.map((store) => (
            <View
              key={store.id}
              className={`store-item ${activeStoreId === store.id ? 'active' : ''}`}
              onClick={() => handleStoreItemClick(store)}
            >
              {/* 头部：名称和距离 */}
              <View className="store-header">
                <Text className="store-name">{store.name}</Text>
                <Text className="store-distance">距离{store.distanceText}</Text>
              </View>

              {/* 地址 */}
              <View className="store-address">
                <Text className="address-text">{store.address}</Text>
              </View>

              {/* 价格信息 */}
              <View className="store-price">
                <View className="price-item">
                  <Text className="price-label">台球</Text>
                  <Text className="price-symbol">¥</Text>
                  <Text className="price-value">{store.price.toFixed(2)}</Text>
                  <Text className="price-unit">起</Text>
                </View>
                <View className="price-item">
                  <Text className="price-label">棋牌</Text>
                  <Text className="price-symbol">¥</Text>
                  <Text className="price-value">{(store.price + 4).toFixed(2)}</Text>
                  <Text className="price-unit">起</Text>
                </View>
              </View>
            </View>
          ))}

          {storeList.length === 0 && (
            <View className="empty-state">
              <Text className="empty-text">暂无门店数据</Text>
            </View>
          )}
        </ScrollView>
      </View>
    </View>
  )
})

export default MapStorePage