<template>
  <view class="container">
    <page-head title="scroll-view 下拉刷新"></page-head>
    <scroll-view class="scroll" refresher-enabled=true :refresher-triggered="refresherTriggered"
      @refresherrefresh="onRefresherrefresh" @refresherabort="onRefresherabort" @refresherrestore="onRefresherrestore"
      @refresherpulling="onRefresherpulling" @scrolltolower="onScrolltolower" :show-scrollbar="showScrollbar">
      <view v-for="key in scrollData" :key="key">
        <view class="scroll-item">
          <text class="scroll-item-title">{{key}}</text>
        </view>
      </view>
    </scroll-view>
  </view>
</template>
<script>
  type RefresherEventTest = {
    type : string;
    target : UniElement | null;
    currentTarget : UniElement | null;
    dy : number;
  }
  export default {
    data() {
      return {
        scrollData: [] as Array<string>,
        refresherTriggered: false,
        refresherrefresh: false,
        refresherrefreshTimes: 0,
        showScrollbar: false,
        // 自动化测试使用
        refresherrefreshTest: "",
        onRefresherabortTest: "",
        onRefresherrestoreTest: "",
        onRefresherpullingTest: ""
      };
    },
    onLoad() {
      let lists : Array<string> = []
      for (let i = 0; i < 20; i++) {
        lists.push("item---" + i)
      }
      this.scrollData = lists
    },

    methods: {
      onRefresherrefresh(e : UniRefresherEvent) {
        this.refresherrefresh = true
        console.log("onRefresherrefresh------下拉刷新触发")
        this.checkEventTest({
          type: e.type,
          target: e.target,
          currentTarget: e.currentTarget,
          dy: e.detail.dy,
        } as RefresherEventTest, 'refresherrefresh')
        this.refresherTriggered = true
        this.refresherrefreshTimes++
        setTimeout(() => {
          this.refresherTriggered = false
        }, 1500)
      },
      onRefresherabort(e : UniRefresherEvent) {
        console.log("onRefresherabort------下拉刷新被中止")
        this.checkEventTest({
          type: e.type,
          target: e.target,
          currentTarget: e.currentTarget,
          dy: e.detail.dy,
        } as RefresherEventTest, 'refresherabort')
      },
      onRefresherrestore(e : UniRefresherEvent) {
        this.refresherrefresh = false
        console.log("onRefresherrestore------下拉刷新被复位")
        this.checkEventTest({
          type: e.type,
          target: e.target,
          currentTarget: e.currentTarget,
          dy: e.detail.dy,
        } as RefresherEventTest, 'refresherrestore')
      },
      onRefresherpulling(e : UniRefresherEvent) {
        console.log("onRefresherpulling------拉刷新控件被下拉-dy=" + e.detail.dy)
        this.checkEventTest({
          type: e.type,
          target: e.target,
          currentTarget: e.currentTarget,
          dy: e.detail.dy,
        } as RefresherEventTest, 'refresherpulling')
      },
      onScrolltolower(e : UniScrollToLowerEvent) {
        console.log("onScrolltolower 滚动到底部-----" + e.detail.direction)
      },
      // 自动化测试专用（由于事件event参数对象中存在循环引用，在ios端JSON.stringify报错，自动化测试无法page.data获取）
      checkEventTest(e : RefresherEventTest, eventName : String) {
        // #ifndef MP
        const isPass = e.type === eventName && e.target instanceof UniElement && e.currentTarget instanceof UniElement && e.dy > 0;
        // #endif
        // #ifdef MP
        const isPass = true
        // #endif
        const result = isPass ? `${eventName}:Success` : `${eventName}:Fail`;
        switch (eventName) {
          case 'refresherrefresh':
            this.refresherrefreshTest = result
            break;
          case 'refresherpulling':
            this.onRefresherpullingTest = result
            break;
          case 'refresherrestore':
            this.onRefresherrestoreTest = result
            break;
          case 'refresherabort':
            this.onRefresherabortTest = result
            break;
          default:
            break;
        }
      },
      //自动化测试专用
      setPageStyle(pageStyle: UTSJSONObject) {
        const pages = getCurrentPages();
        const currentPage = pages[pages.length - 1];
        currentPage.setPageStyle(pageStyle);
      }
    }
  };
</script>

<style>
  .container {
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .scroll {
    background-color: #eee;
    position: relative;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    border-color: red;
    border-radius: 6px;
  }

  .scroll-item {
    margin-left: 6px;
    margin-right: 6px;
    margin-top: 6px;
    background-color: #fff;
    border-radius: 4px;
  }

  .scroll-item-title {
    width: 100%;
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #555;
  }
</style>
