<template>
  <view style="flex: 1;">
    <view class="uni-padding-wrap uni-common-mt">
      <view class="uni-common-mt" style="border-width: 2px;border-style: solid; border-radius: 4px;">
        <textarea :value="res" class="uni-textarea" style="width: 100%"></textarea>
      </view>
      <view>
        <text>地址 : {{ host + url}}</text>
        <text>请求方式 : {{method}}</text>
      </view>
      <view class="uni-btn-v uni-common-mt">
        <button type="primary" @tap="checkRequestTask" id="checkRequestTask">发起流式请求（设置监听需重新点击、勿重复点击）</button>
        <view class="uni-common-pb"></view>
        <button type="primary" @tap="abort" id="abort">中断流式请求</button>
      </view>
    </view>
    <scroll-view style="flex: 1;" show-scrollbar="true">
      <view style="padding: 20px;">
        <text>添加或者移除流式监听</text>
        <view class="uni-common-pb"></view>
        <view style="flex-direction: row;flex-wrap: wrap;">
          <button style="padding: 5px;" type="primary" size="mini" @tap="onHeadersReceived_observe_1"
            id="onHeadersReceived_observe_1">onHeadersReceived监听1</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="onHeadersReceived_observe_2"
            id="onHeadersReceived_observe_2">onHeadersReceived监听2</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="onChunkReceived_observe_1"
            id="onChunkReceived_observe_1">onChunkReceived监听1</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="onChunkReceived_observe_2"
            id="onChunkReceived_observe_2">onChunkReceived监听2</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="offHeadersReceived_id"
            id="offHeadersReceived_id">offHeadersReceived(id)</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="offHeadersReceived_observe"
            id="offHeadersReceived_observe">offHeadersReceived移除所有</button>
          <button style="padding: 5px;" type="primary" size="mini" @tap="offChunkReceived_observe"
            id="offChunkReceived_observe">offChunkReceived移除所有</button>
        </view>
      </view>
    </scroll-view>
  </view>
</template>
<script>
  export default {
    data() {
      return {
        res: '',
        task: null as RequestTask | null,
        host: "https://request.dcloud.net.cn",
        url: "/api/http/contentType/eventStream?limit=10",
        method: "POST" as RequestMethod,
        onHeadersReceivedObseves: [] as number[],
        onChunkReceivedObseves: [] as number[],
        onHeadersReceived_returnid_1: -1,
        onHeadersReceived_returnid_2: -1,
        isAbort: false,
      }
    },
    onLoad() {
      this.onHeadersReceivedObseves.push(1)
      this.onChunkReceivedObseves.push(1)
    },
    onUnload() {
      uni.hideLoading();
      this.task?.abort();
    },
    methods: {
      onHeadersReceived_observe_1: function () {
        this.onHeadersReceivedObseves.push(1)
      },
      onHeadersReceived_observe_2: function () {
        this.onHeadersReceivedObseves.push(2)
      },
      offHeadersReceived_observe: function () {
        this.onHeadersReceivedObseves = []
      },
      offHeadersReceived_id: function () {
        this.onHeadersReceivedObseves = []
        this.onHeadersReceivedObseves.push(1)
      },
      onChunkReceived_observe_1: function () {
        this.onChunkReceivedObseves.push(1)
      },
      onChunkReceived_observe_2: function () {
        this.onChunkReceivedObseves.push(2)
      },
      offChunkReceived_observe: function () {
        this.onChunkReceivedObseves = []
      },
      checkRequestTask: function () {
        this.isAbort = false
        this.res = '发起post流式请求 \n\n'
        this.task = uni.request({
          url: "https://request.dcloud.net.cn/api/http/contentType/eventStream?limit=10",
          timeout: 600000,
          method: this.method,
          enableChunked: true,
          success: (res) => {
            console.log('request success', JSON.stringify(res.data))
            console.log('request success header is :', JSON.stringify(res.header))
            this.res += '流式请求结束 \n\n'
            console.log('请求结果 : ' + JSON.stringify(res))
          },
          fail: (err) => {
            let content = err.errMsg
            if (this.isAbort) {
              content = "中断成功"
            }
            console.log('request fail', err);
            uni.showModal({
              content: content,
              showCancel: false
            });
          },
          complete: () => {
            this.task = null
          },
        });

        const onHeadersReceivedCallback1 = (res : RequestTaskOnHeadersReceivedListenerResult) => {
          console.log("-------onHeadersReceived监听1------", res)
          this.res += `onHeadersReceived监听1：\n ${JSON.stringify(res)} \n\n`
        }
        const onHeadersReceivedCallback2 = (res : RequestTaskOnHeadersReceivedListenerResult) => {
          console.log("-------onHeadersReceived监听2------", res)
          this.res += `onHeadersReceived监听2：\n ${JSON.stringify(res)}  \n\n`
        }

        if (this.onHeadersReceivedObseves.includes(1)) {
          this.onHeadersReceived_returnid_1 = this.task?.onHeadersReceived(onHeadersReceivedCallback1) ?? -1
        }

        if (this.onHeadersReceivedObseves.length == 0) {
          this.task?.offHeadersReceived(null)
          this.res += "点击了 offHeadersReceived \n\n"
        } else if (this.onHeadersReceivedObseves.length == 1) {
          this.task?.offHeadersReceived(this.onHeadersReceived_returnid_2)
        }

        const onChunkReceivedCallback1 = (res : RequestTaskOnChunkReceivedListenerResult) => {
          const chunkText : string = new TextDecoder().decode(res.data)
          console.log("-------onChunkReceived监听1------", chunkText)
          this.res += `onChunkReceived监听1：\n ${chunkText}`
        }
        const onChunkReceivedCallback2 = (res : RequestTaskOnChunkReceivedListenerResult) => {
          const chunkText : string = new TextDecoder().decode(res.data)
          console.log("-------onChunkReceived监听2------", chunkText)
          this.res += `onChunkReceived监听2：\n ${chunkText}`
        }

        if (this.onHeadersReceivedObseves.includes(2)) {
          this.onHeadersReceived_returnid_2 = this.task?.onHeadersReceived(onHeadersReceivedCallback2) ?? -1
        }

        if (this.onChunkReceivedObseves.includes(1)) {
          this.task?.onChunkReceived(onChunkReceivedCallback1)
        }

        if (this.onChunkReceivedObseves.includes(2)) {
          this.task?.onChunkReceived(onChunkReceivedCallback2)
        }

        if (this.onChunkReceivedObseves.length == 0) {
          this.task?.offChunkReceived(null)
          this.res += "点击了 offChunkReceived \n\n"
        }
      },
      abort() {
        this.isAbort = true
        this.task?.abort()
      }

    }
  }
</script>

<style>
  .uni-textarea {
    padding: 9px;
    font-size: 14px;
  }
</style>