<template>
  <div class="app-container">
    <el-container class="app">
      <el-aside width="calc(30% - 20px)" style="background-color: white">
        <el-container>
          <el-header>
            <el-row>
              <el-col :span="24">
                <el-input suffix-icon="el-icon-search" placeholder="Enter 回车搜索联系人" v-model="contactQueryParams.userName" @keyup.enter.native="getContactList"/>
              </el-col>
            </el-row>
            <el-row style="margin-top: 5px">
              <!-- TODO 这里搞一个弹窗去搜索用户表 从而进行添加好友操作 -->
              <el-button size="mini">添加联系人</el-button>

            </el-row>
            <el-row style="margin-top: 5px">
              <el-button size="mini">全部</el-button>
              <el-button size="mini">个人</el-button>
              <el-button size="mini">群聊</el-button>
            </el-row>
          </el-header>
          <div v-loading="contactListLoading" style="margin-top: 30px">
            <el-main v-if="contactList.length > 0" v-infinite-scroll="contactLoadMore" :infinite-scroll-distance="750" :infinite-scroll-disabled="contactListTotal < 10" class="msgListMain">
              <el-row class="msgUserList" v-for="(item, index) in contactList" :key="item.contactUserId" :style="index > 0 && 'margin-top: 10px'" @click.native="loadMessage(item.id)">
                <el-col :span="6">
                  <el-image :src="(item.user.avatar === '' || item.user.avatar == null) ? require('@/assets/images/profile.jpg') : item.user.avatar" fit="fill" style="width: 70%;border-radius: 50%;"/>
                </el-col>
                <el-col :span="18">
                  <el-row>
                    <el-col :span="15"><span style="font-weight: 500; font-size: 16px">{{item.user.nickName}}</span></el-col>
                    <el-col :span="5">
                      <el-divider direction="vertical"/>
                    </el-col>
                  </el-row>
                  <el-row>
                    <el-col :span="5" style="font-size: 13px; text-overflow: ellipsis; white-space: nowrap">
                      <span><i class="el-icon-circle-check"></i>  {{item.endMsg}}</span>
                    </el-col>
                    <el-col :span="5" style="float: right">
                      <el-dropdown class="hover_down_menu">
                        <span class="el-dropdown-link">
                          <i class="el-icon-arrow-down el-icon-more"></i>
                        </span>
                        <el-dropdown-menu slot="dropdown">
                          <el-dropdown-item>置顶</el-dropdown-item>
                          <el-dropdown-item>删除</el-dropdown-item>
                        </el-dropdown-menu>
                      </el-dropdown>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </el-main>
            <el-main v-else class="msgListMain_empty">
              <el-row>
                <el-col :span="24">
                  <img src="@/assets/images/contact.png" style="width: 80%; height: 80%"/>
                </el-col>
              </el-row>
              <el-row>
                <el-col :span="24">
                  <span style="color: gray">暂无联系人</span>
                </el-col>
              </el-row>
            </el-main>
          </div>
        </el-container>
      </el-aside>
      <el-main :class="currentContact.id ? 'main' : 'main_empty'" v-loading="msgListLoading">
        <div v-if="currentContact.id">
          <el-row>
            <el-col :span="8" style="color: #666">
              <span style="font-weight: 500; font-size: 16px">{{currentContact.userName}}</span>
              <span style="font-size: 16px; margin-left: 30px">{{currentContact.industry}}</span>
              <el-divider direction="vertical"/>
              <span style="font-size: 16px;">{{currentContact.job}}</span>
            </el-col>
          </el-row>
          <el-row>
            <el-col :span="24">
              <span>{{currentContact.major}}</span>
              <span style="color: red; font-size: 17px; margin-left: 20px">{{currentContact.salary}}</span>
              <span style="margin-left: 20px">{{currentContact.city}}</span>
            </el-col>
          </el-row>
          <el-row>
            <el-col :span="24" class="msg_content" id="message_content">
              <el-row v-for="(item, index) in msgList" :key="item.id" :style="index > 0 && 'margin-top: 30px'">
                <div v-if="item.userId === currentContact.contactUserId">
                  <el-col :span="2" style="text-align: center">
                    <el-image :src="currentContact.avatar" fit="cover" style="width: 40%;border-radius: 50%"/>
                  </el-col>
                  <el-col :span="10" style="font-size: 16px; line-height: 40px;">
                    <span>{{item.content}}</span>
                    <span style="font-size: 11px; color: gray; margin-left: 5px">{{item.createTime}}</span>
                  </el-col>
                </div>
                <div v-else>
                  <el-col :span="24" style="font-size: 16px;">
                    <div class="chat_bubble">
                      <span>{{item.content}}</span>
                    </div>
                    <i class="el-icon-circle-check" style="float: right; margin-right: 5px; color: lightgray; vertical-align: bottom; margin-top: 23px"></i>
                    <span style="font-size: 11px; color: gray; margin-right: 5px; float: right; margin-top: 25px">{{item.createTime}}</span>
                  </el-col>
                </div>
              </el-row>
              <el-row id="message_content_end" style="height: 15px"><el-col></el-col></el-row>
            </el-col>
          </el-row>
          <el-row>
            <el-col :span="24">
              <el-row>
                <el-col :span="24">
                  <el-popover
                    placement="top-start"
                    trigger="click">
                    <div>
                      <VEmojiPicker :showSearch="false" @select="insertEmoji" />
                    </div>
                    <img slot="reference" src="@/assets/images/emoji.png" title="表情" class="input_top_menu_img"/>
                  </el-popover>
                </el-col>
              </el-row>

              <el-input type="textarea" :rows="3" v-model="inputVal" style="font-size: 17px; color: black" @keyup.enter.native="send" placeholder="Enter 回车发送消息"/>
            </el-col>
          </el-row>
        </div>
        <div v-else>
          <el-row>
            <el-col :span="24">
              <img src="@/assets/images/message.png"/>
            </el-col>
          </el-row>
          <el-row>
            <el-col :span="24">
              <span style="color: gray">与您进行过沟通的联系人都会在左侧列表中显示</span>
            </el-col>
          </el-row>
        </div>
      </el-main>
    </el-container>
  </div>
</template>

<script>
import { VEmojiPicker } from 'v-emoji-picker';
import { parseTime } from '@/utils/ruoyi';
import { listContact, getContact } from "@/api/system/contact";
import { addMessage } from "@/api/system/message";

export default {
  name: "chat",
  components: {
    VEmojiPicker
  },
  data() {
    return {
      //联系人列表
      contactList: [],
      contactListTotal: 0,
      contactListLoading: false,
      //消息记录
      msgList: [],
      msgListTotal: 0,
      msgListLoading: false,
      inputVal: '',
      search: '',
      contactUserId: null,
      userId: null,
      contactQueryParams: {
        pageSize: 10,
        pageNum: 1
      },
      currentContact: {}
    }
  },
  mounted() {
    window.addEventListener("onmessageWS", this.subscribeMessage);
  },
  created() {
    this.userId = this.$store.state.user.id;
    this.subscribeMessage();
    this.getContactList();
  },
  methods: {
    getContactList() {
      this.contactListLoading = true;
      this.contactQueryParams.userId = this.userId;
      listContact(this.contactQueryParams).then(response => {
        if (response.code === 200) {
          this.contactList = response.rows;
          this.contactListTotal = response.total;
          const contactUserId = this.$route.query.userId;
          if (contactUserId) {
            this.contactUserId = contactUserId;
            let contact = response.rows.find(row => row.contactUserId == contactUserId);
            this.loadMessage(contact.id);
          }
        }
        this.contactListLoading = false;
      })
    },
    contactLoadMore() {
      // this.contactQueryParams.pageSize = 5;
      // this.contactQueryParams.pageNum++;
      this.getContactList();
    },
    loadMessage(concatId) {
      this.msgListLoading = true;
      getContact(concatId).then(response => {
        if (response.code === 200) {
          this.currentContact = response.data;
          this.msgList = response.data.messages;
        }
        this.msgListLoading = false;
        this.fleshScroll();
      })
    },
    insertEmoji(emoji) {
      this.inputVal += emoji.data;
    },
    send() {
      const message = {
        contactId: this.currentContact.id,
        userId: this.userId,
        content: this.inputVal,
        roomId: this.currentContact.roomId
      }
      this.msgList.push({
        ...message,
        id: this.msgList.length + 1,
        createTime: parseTime(new Date())
      })
      this.fleshLastMsg();
      addMessage(message);
      const msg = {
        sendUserId: this.userId,
        sendUserName: this.$store.state.user.name,
        userId: this.currentContact.contactUserId,
        type: "chat",
        detail: this.inputVal
      }
      this.$websocket.sendWebsocket(JSON.stringify(msg));
      this.inputVal = '';
      this.fleshScroll();
    },
    subscribeMessage(res) {
      console.log(res);
      if (res) {
        const { sendUserId, sendUserName, userId, type, detail } = res.detail.data;
        const message = {
          id: 1,
          contactId: userId,
          userId: sendUserId,
          content: detail,
          roomId: this.currentContact.roomId,
          createTime: parseTime(new Date())
        }
        this.msgList.push(message);
        this.fleshLastMsg();
        this.fleshScroll();
      }
    },
    fleshLastMsg() {
      const index = this.contactList.findIndex(e => e.id === this.currentContact.id);
      this.contactList[index].endMsg = this.msgList[this.msgList.length - 1].content;
    },
    fleshScroll() {
      this.$nextTick(() => {
        document.getElementById("message_content_end").scrollIntoView();
      })
    }
  }
}
</script>

<style scoped lang="scss">
.app-container {
  background: linear-gradient(180deg, rgba(0, 190, 189, .1), rgba(136, 255, 254, .2) 50%, rgba(242, 244, 247, .1));
}
.app {
  background-color: white;
  border-radius: 12px 12px 0 0;
}
.msgListMain {
  height: 500px;
  overflow-y:auto;
  margin-top: 15px;
}
.msgUserList {
  border-radius: 10px;
}
.msgListMain_empty {
  display: flex;
  height: 500px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
.hover_down_menu {
  display: none;
}
.msgUserList:hover {
  background-color: #f2f2f2;
  cursor: pointer;
}
.msgUserList:hover .hover_down_menu{
  display: block;
}
.el-dropdown-link {
  cursor: pointer;
}
.el-icon-arrow-down {
  font-size: 15px;
  font-weight: 500;
}
.main {
  background-color: white;
  height: 600px;
  margin-left: 5px;
}
.main_empty {
  display: flex;
  background-color: white;
  height: 600px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.main_empty .el-row {
  text-align: center;
}
.main_empty img {
  width: 25%;
}
.msg_content {
  margin-top: 30px;
  height: 390px;
  overflow: auto;
  //background-color: gray;
}
.chat_bubble {
  float: right;
  margin-right: 35px;
  color: #333;
  background-color: rgba(0, 190, 189, .2);
  height: 40px;
  line-height: 40px;
  padding: 0 12px 0 12px;
  border-radius: 5px;
}
.input_top_menu_img{
  width: 22px;
  height: 22px;
  cursor: pointer;
}
</style>
