<!--
  - Copyright (C) 2018-2019
  - All rights reserved, Designed By www.joolun.com
  芋道源码：
  ① 移除暂时用不到的 websocket
  ② 代码优化，补充注释，提升阅读性
-->
<template>
  <ContentWrap>
    <div class="msg-div" :id="'msg-div' + nowStr">
      <!-- 加载更多 -->
      <div v-loading="loading"></div>
      <div v-if="!loading">
        <div class="el-table__empty-block" v-if="loadMore" @click="loadingMore"
          ><span class="el-table__empty-text">点击加载更多</span></div
        >
        <div class="el-table__empty-block" v-if="!loadMore"
          ><span class="el-table__empty-text">没有更多了</span></div
        >
      </div>
      <!-- 消息列表 -->
      <div class="execution" v-for="item in list" :key="item.id">
        <div class="avue-comment" :class="item.sendFrom === 2 ? 'avue-comment--reverse' : ''">
          <div class="avatar-div">
            <img
              :src="item.sendFrom === 1 ? user.avatar : mp.avatar"
              class="avue-comment__avatar"
            />
            <div class="avue-comment__author"
              >{{ item.sendFrom === 1 ? user.nickname : mp.nickname }}
            </div>
          </div>
          <div class="avue-comment__main">
            <div class="avue-comment__header">
              <div class="avue-comment__create_time">{{ formatDate(item.createTime) }}</div>
            </div>
            <div
              class="avue-comment__body"
              :style="item.sendFrom === 2 ? 'background: #6BED72;' : ''"
            >
              <!-- 【事件】区域 -->
              <div v-if="item.type === 'event' && item.event === 'subscribe'">
                <el-tag type="success">关注</el-tag>
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'unsubscribe'">
                <el-tag type="danger">取消关注</el-tag>
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'CLICK'">
                <el-tag>点击菜单</el-tag>
                【{{ item.eventKey }}】
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'VIEW'">
                <el-tag>点击菜单链接</el-tag>
                【{{ item.eventKey }}】
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'scancode_waitmsg'">
                <el-tag>扫码结果</el-tag>
                【{{ item.eventKey }}】
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'scancode_push'">
                <el-tag>扫码结果</el-tag>
                【{{ item.eventKey }}】
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'pic_sysphoto'">
                <el-tag>系统拍照发图</el-tag>
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'pic_photo_or_album'">
                <el-tag>拍照或者相册</el-tag>
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'pic_weixin'">
                <el-tag>微信相册</el-tag>
              </div>
              <div v-else-if="item.type === 'event' && item.event === 'location_select'">
                <el-tag>选择地理位置</el-tag>
              </div>
              <div v-else-if="item.type === 'event'">
                <el-tag type="danger">未知事件类型</el-tag>
              </div>
              <!-- 【消息】区域 -->
              <div v-else-if="item.type === 'text'">{{ item.content }}</div>
              <div v-else-if="item.type === 'voice'">
                <wx-voice-player :url="item.mediaUrl" :content="item.recognition" />
              </div>
              <div v-else-if="item.type === 'image'">
                <a target="_blank" :href="item.mediaUrl">
                  <img :src="item.mediaUrl" style="width: 100px" />
                </a>
              </div>
              <div
                v-else-if="item.type === 'video' || item.type === 'shortvideo'"
                style="text-align: center"
              >
                <wx-video-player :url="item.mediaUrl" />
              </div>
              <div v-else-if="item.type === 'link'" class="avue-card__detail">
                <el-link type="success" :underline="false" target="_blank" :href="item.url">
                  <div class="avue-card__title"><i class="el-icon-link"></i>{{ item.title }}</div>
                </el-link>
                <div class="avue-card__info" style="height: unset">{{ item.description }}</div>
              </div>
              <!-- TODO 芋艿：待完善 -->
              <div v-else-if="item.type === 'location'">
                <wx-location
                  :label="item.label"
                  :location-y="item.locationY"
                  :location-x="item.locationX"
                />
              </div>
              <div v-else-if="item.type === 'news'" style="width: 300px">
                <!-- TODO 芋艿：待测试；详情页也存在类似的情况 -->
                <wx-news :articles="item.articles" />
              </div>
              <div v-else-if="item.type === 'music'">
                <wx-music
                  :title="item.title"
                  :description="item.description"
                  :thumb-media-url="item.thumbMediaUrl"
                  :music-url="item.musicUrl"
                  :hq-music-url="item.hqMusicUrl"
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="msg-send" v-loading="sendLoading">
      <wx-reply-select ref="replySelect" :objData="objData" />
      <el-button type="success" size="small" class="send-but" @click="sendMsg">发送(S)</el-button>
    </div>
  </ContentWrap>
</template>

<script lang="ts" name="WxMsg">
import { getMessagePage, sendMessage } from '@/api/mp/message'
import WxReplySelect from '@/views/mp/components/wx-reply/main.vue'
import WxVideoPlayer from '@/views/mp/components/wx-video-play/main.vue'
import WxVoicePlayer from '@/views/mp/components/wx-voice-play/main.vue'
import WxNews from '@/views/mp/components/wx-news/main.vue'
import WxLocation from '@/views/mp/components/wx-location/main.vue'
import WxMusic from '@/views/mp/components/wx-music/main.vue'
import { getUser } from '@/api/mp/user'
import { defineComponent } from 'vue'

const message = useMessage() // 消息弹窗
import profile from '@/assets/imgs/profile.jpg'
import wechat from '@/assets/imgs/wechat.png'
import { formatDate } from '@/utils/formatTime'

export default defineComponent({
  components: {
    WxReplySelect,
    WxVideoPlayer,
    WxVoicePlayer,
    WxNews,
    WxLocation,
    WxMusic
  },
  props: {
    userId: {
      type: Number,
      required: true
    }
  },
  setup(props) {
    const nowStr = ref(new Date().getTime()) // 当前的时间戳，用于每次消息加载后，回到原位置；具体见 :id="'msg-div' + nowStr" 处
    const loading = ref(false) // 消息列表是否正在加载中
    const loadMore = ref(true) // 是否可以加载更多
    const list = ref<any[]>([]) // 消息列表
    const queryParams = reactive({
      pageNo: 1, // 当前页数
      pageSize: 14, // 每页显示多少条
      accountId: undefined
    })
    const user = reactive({
      // 由于微信不再提供昵称，直接使用“用户”展示
      nickname: '用户',
      avatar: profile,
      accountId: 0 // 公众号账号编号
    })
    const mp = reactive({
      nickname: '公众号',
      avatar: wechat
    })

    // ========= 消息发送 =========
    const sendLoading = ref(false) // 发送消息是否加载中
    const objData = reactive({
      // 微信发送消息
      type: 'text',
      accountId: null,
      articles: []
    })

    const replySelect = ref(null)
    // 执行发送
    const sendMsg = async () => {
      if (!objData) {
        return
      }
      //     // 公众号限制：客服消息，公众号只允许发送一条
      if (objData.type === 'news' && objData.articles.length > 1) {
        objData.articles = [objData.articles[0]]
        message.success('图文消息条数限制在 1 条以内，已默认发送第一条')
      }
      let data = await sendMessage(Object.assign({ userId: props.userId }, { ...objData }))
      sendLoading.value = false
      list.value = [...list.value, ...[data]]
      scrollToBottom()
      //ts檢查的時候會判斷這個組件可能是空的，所以需要進行斷言。
      //避免 tab 的数据未清理
      const deleteObj = (replySelect.value as any).deleteObj
      if (deleteObj) {
        deleteObj()
      }
    }
    const loadingMore = () => {
      queryParams.pageNo++
      getPage(queryParams, null)
    }
    const getPage = async (page, params) => {
      loading.value = true
      let dataTemp = await getMessagePage(
        Object.assign(
          {
            pageNo: page.pageNo,
            pageSize: page.pageSize,
            userId: props.userId,
            accountId: page.accountId
          },
          params
        )
      )
      const msgDiv = document.getElementById('msg-div' + nowStr.value)
      let scrollHeight = 0
      if (msgDiv) {
        scrollHeight = msgDiv.scrollHeight
      }
      // 处理数据
      let data = dataTemp.list.reverse()
      list.value = [...data, ...list.value]
      loading.value = false
      if (data.length < queryParams.pageSize || data.length === 0) {
        loadMore.value = false
      }
      queryParams.pageNo = page.pageNo
      queryParams.pageSize = page.pageSize
      // 滚动到原来的位置
      if (queryParams.pageNo === 1) {
        // 定位到消息底部
        scrollToBottom()
      } else if (data.length !== 0) {
        // 定位滚动条
        await nextTick(() => {
          if (scrollHeight !== 0) {
            let div = document.getElementById('msg-div' + nowStr.value)
            if (div && msgDiv) {
              msgDiv.scrollTop = div.scrollHeight - scrollHeight - 100
            }
          }
        })
      }
    }
    const refreshChange = () => {
      getPage(queryParams, null)
    }
    /** 定位到消息底部 */
    const scrollToBottom = () => {
      nextTick(() => {
        let div = document.getElementById('msg-div' + nowStr.value)
        if (div) {
          div.scrollTop = div.scrollHeight
        }
      })
    }

    onMounted(async () => {
      let data = await getUser(props.userId)
      user.nickname = data.nickname && data.nickname.length > 0 ? data.nickname : user.nickname
      user.avatar = data.avatar && user.avatar.length > 0 ? data.avatar : user.avatar
      user.accountId = data.accountId
      queryParams.accountId = data.accountId
      objData.accountId = data.accountId
      refreshChange()
    })
    return {
      sendMsg,
      loadingMore,
      formatDate,
      scrollToBottom,
      objData,
      mp,
      user,
      queryParams,
      list,
      loadMore,
      loading,
      nowStr,
      sendLoading
    }
  }
})
</script>
<style lang="scss" scoped>
/* 因为 joolun 实现依赖 avue 组件，该页面使用了 comment.scss、card.scc  */
@import './comment.scss';
@import './card.scss';

.msg-main {
  margin-top: -30px;
  padding: 10px;
}

.msg-div {
  height: 50vh;
  overflow: auto;
  background-color: #eaeaea;
  margin-left: 10px;
  margin-right: 10px;
}

.msg-send {
  padding: 10px;
}

.avatar-div {
  text-align: center;
  width: 80px;
}

.send-but {
  float: right;
  margin-top: 8px !important;
}
</style>
