<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 setup lang="uts">

  const res = ref('')
  const task = ref<RequestTask | null>(null)
  const host = "https://request.dcloud.net.cn"
  const url = "/api/http/contentType/eventStream?limit=10"
  const method: RequestMethod = "POST"
  const onHeadersReceivedObseves = ref<number[]>([])
  const onChunkReceivedObseves = ref<number[]>([])
  const onHeadersReceived_returnid_1 = ref(-1)
  const onHeadersReceived_returnid_2 = ref(-1)
  const isAbort = ref(false)

  onLoad((options : OnLoadOptions) => {
    onHeadersReceivedObseves.value.push(1)
    onChunkReceivedObseves.value.push(1)
  })

  onUnload(() => {
    uni.hideLoading();
    task.value?.abort();
  })

  function onHeadersReceived_observe_1() {
    onHeadersReceivedObseves.value.push(1)
  }

  function onHeadersReceived_observe_2() {
    onHeadersReceivedObseves.value.push(2)
  }

  function offHeadersReceived_observe() {
    onHeadersReceivedObseves.value = []
  }

  function offHeadersReceived_id() {
    onHeadersReceivedObseves.value = []
    onHeadersReceivedObseves.value.push(1)
  }

  function onChunkReceived_observe_1() {
    onChunkReceivedObseves.value.push(1)
  }

  function onChunkReceived_observe_2() {
    onChunkReceivedObseves.value.push(2)
  }

  function offChunkReceived_observe() {
    onChunkReceivedObseves.value = []
  }

  function checkRequestTask() {
    isAbort.value = false
    res.value = '发起post流式请求 \n\n'
    task.value = uni.request({
      url: "https://request.dcloud.net.cn/api/http/contentType/eventStream?limit=10",
      timeout: 600000,
      method: method,
      enableChunked: true,
      success: (response) => {
        console.log('request success', JSON.stringify(response.data))
        console.log('request success header is :', JSON.stringify(response.header))
        res.value += '流式请求结束 \n\n'
        console.log('请求结果 : ' + JSON.stringify(response))
      },
      fail: (err) => {
        let content = err.errMsg
        if (isAbort.value) {
          content = "中断成功"
        }
        console.log('request fail', err);
        uni.showModal({
          content: content,
          showCancel: false
        });
      },
      complete: () => {
        task.value = null
      },
    });

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

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

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

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

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

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

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

    if (onChunkReceivedObseves.value.length == 0) {
      task.value?.offChunkReceived(null)
      res.value += "点击了 offChunkReceived \n\n"
    }
  }

  function abort() {
    isAbort.value = true
    task.value?.abort()
  }
</script>

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