<template>
  <view class="gg u-p-20">
    <!-- 利用.sync修饰符，将searchKeyword传递到子组件 -->
    <PickUpLocationHeader :searchKeyword.sync="searchKeyword" @getSearchLeader="getSearchLeader"/>

    <u-gap height="20"/>

    <map id="pickUpLocationMap" :latitude="latitude" :longitude="longitude" :markers="covers" :scale="scale"
         class="gg-location-map" show-location @markertap="mapMarkertap"></map>

    <view class="gg-location">
      <!-- 利用scroll-into-view进行选中提货点的定位操作 -->
      <scroll-view :scroll-into-view="`map-${markerId}`" class="gg-location-scroll" scroll-with-animation scroll-y
                   @scrolltolower="loadMore">
        <block v-if="searchResult.content.length > 0">
          <view v-for="(item, index) in searchResult.content" :id="`map-${item.id}`" :key="item.id" class="u-m-b-20">
            <PickUpLocationItem
                :isCurrent="checkIsCurrent(item.id)"
                :location="item"
                :selected="markerId === item.id"
                @selectPickUpLocation="selectPickUpLocation"
            ></PickUpLocationItem>
          </view>
        </block>
        <u-empty v-else mode="list"></u-empty>
      </scroll-view>
    </view>

    <view class="gg-confirm-pick-up-location">
      <u-button type="warning">确认提货点</u-button>
    </view>
  </view>
</template>

<script>
import {mapState, mapGetters, mapMutations, mapActions} from 'vuex';

export default {
  data() {
    return {
      searchKeyword: '',
      filter: {
        page: 1, // 当前页码
        limit: 5, // 每页记录数
        latitude: '', // 经度
        longitude: '' // 纬度
      },
      searchResult: {
        content: [],
        last: false
      },
      scale: 12, // 缩放尺寸
      markerId: 0, // 当前选中标记
      covers: [
        {
          latitude: 39.909,
          longitude: 116.39742,
          iconPath: '/static/images/location.png',
          width: 30,
          height: 30
        }
      ]
    };
  },
  computed: {
    ...mapState('pickUpLocationModule', ['leaderAddressVo']),
    ...mapGetters('pickUpLocationModule', ['checkIsCurrent'])
  },
  methods: {
    ...mapActions('pickUpLocationModule', ['selectLeaderAddressVoAction']),
    async getSearchLeader(data) {
      // 查询数据
      if (data) {
        Object.assign(this.$data.searchResult, this.$options.data().searchResult); // 这里重置 searchResult 下的所有数据
        Object.assign(this.$data.filter, this.$options.data().filter); // 这里重置 filter 下的所有数据
      }
      this.filter.latitude = data ? data.latitude : this.filter.latitude;
      this.filter.longitude = data ? data.longitude : this.filter.longitude;

      const o = {
        limit: this.filter.limit,
        page: this.filter.page,
        longitude: this.filter.longitude,
        latitude: this.filter.latitude
      };

      let result = await this.$u.api.getSearchLeader(o);
      this.searchResult = {...result, content: [...this.searchResult.content, ...result.content]};

      // marker标记点的设置
      if (this.searchResult.content.length > 0) {
        let covers = [];
        this.searchResult.content.map(item => {
          covers.push({
            id: item.id,
            latitude: item.location.lat,
            longitude: item.location.lon,
            iconPath: '/static/images/location.png',
            width: 30,
            height: 30
          });
        });

        // 需要将查询结果地图上标识
        this.covers = covers;
        // 先将位置移动到第一个位置
        let latitude = this.searchResult.content[0].location.lat;
        let longitude = this.searchResult.content[0].location.lon;
        this.pickUpLocationMapCtx.moveToLocation({latitude, longitude}); // 移动到该位置
        this.scale = 12;
      }
    },
    // 加载更多数据
    loadMore() {
      if (!this.searchResult.last) {
        this.filter.page = this.filter.page + 1;
        this.getSearchLeader();
      }
    },
    // 标记点点击操作
    mapMarkertap({detail: {markerId}}) {
      this.markerId = markerId
    },
    // 选择提货点
    selectPickUpLocation(leaderId) {
      this.selectLeaderAddressVoAction({leaderId});
    },
  },
  onReady: function (e) {
    this.pickUpLocationMapCtx = uni.createMapContext('pickUpLocationMap');
  },
  mounted() {
    uni.getLocation({
      type: 'gcj02',
      success: async res => {
        this.covers[0]['latitude'] = res.latitude;
        this.covers[0]['longitude'] = res.longitude;

        // 通过网页接口从经纬度获取地址信息
        // 会报：Unhandled promise rejection的错误，可以利用trycatch在error阶段获取数据
        try {
          const result = await this.$u.api.getBaiduMapAddress({latitude: res.latitude, longitude: res.longitude});
        } catch (error) {
          this.searchKeyword = error.result.addressComponent.district + error.result.addressComponent.street;
        }

        this.pickUpLocationMapCtx.moveToLocation();
      }
    });
  }
};
</script>

<style lang="scss" scoped>
.gg {
  display: flex;
  flex-direction: column;

  /*  地图设置  */
  &-location-map {
    width: 100%;
    height: calc(100vh - 120rpx - 400rpx - 140rpx);
  }

  /* 滚动区域 */
  &-location {
    padding: 20rpx 20rpx 20rpx 20rpx;

    &-scroll {
      height: 400rpx;
    }
  }
}
</style>
