<template>
  <el-header class="app-header">
    <h3>{{ title }}</h3>
    <!-- 报警列表 -->
    <el-dropdown class="alarm" placement="top">
      <div class="dropdown-wrapper">
        <i class="el-icon-warning" style="font-size: 24px;" :class="`${alarmList.length ? 'alarm-icon' : ''}`"></i>
      </div>
      <el-dropdown-menu slot="dropdown" class="user-dropdown">
        <el-dropdown-item v-if="!alarmList.length">
          <div>暂无报警信息</div>
        </el-dropdown-item>
        <template v-else>
          <el-dropdown-item v-for="item in alarmList" :key="item.id">
            <div @click="alarmDetail">设备{{ item.devcode }} || {{ item.alarmMessage }} || {{ item.alarmTime }}</div>
          </el-dropdown-item>
        </template>
      </el-dropdown-menu>
    </el-dropdown>
    <!--子系统选项-->
    <el-dropdown v-if="showChangeSys" class="systemSelect" size="medium" @command="handleCommand">
      <span class="el-dropdown-link">{{ currentSystem.name }}<i class="el-icon-arrow-down el-icon--right" />
      </span>
      <el-dropdown-menu slot="dropdown">
        <el-dropdown-item v-for="system in systems" :key="system.id" :command="system">
          {{ system.name }}
        </el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>
    <el-dropdown class="dropdown-container">
      <div class="dropdown-wrapper">
        <span style="line-height:50px;">欢迎您，{{ name }}</span>
        <!--<img :src="avatar+'?imageView2/1/w/80/h/80'" class="user-avatar">-->
        <!--        <i class="el-icon-arrow-down" />-->
      </div>
      <el-dropdown-menu slot="dropdown" class="user-dropdown">
        <!--        <el-dropdown-item v-if="!baseConfig.singleSys">-->
        <!--          <span style="display:block;" @click="backToIndex">回首页</span>-->
        <!--        </el-dropdown-item>-->
        <!--        <el-dropdown-item :divided="!baseConfig.singleSys">-->
        <!--          <span style="display:block;" @click="resetPwd">修改密码</span>-->
        <!--        </el-dropdown-item>-->
        <el-dropdown-item divided>
          <span style="display:block;" @click="logout">注销</span>
        </el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>
    <reset-pwd v-show="showSetPwd" ref="retPwd" />
    <alarm-dialog ref="alarmRef" />
  </el-header>
</template>

<script>
import { mapGetters } from 'vuex'
import ResetPwd from '@/views/system/user/resetPwd'
import alarmDialog from '../../components/alarmDialog.vue'
import { getAlarmList } from '@/api/alarm/alarm'
export default {
  name: 'AppHeader',
  components: { ResetPwd, alarmDialog },
  data() {
    return {
      title: this.baseConfig.title, // 标题
      showChangeSys: !this.baseConfig.singleSys, // 是否显示切换系统菜单
      name: this.$store.getters.name, // 用户姓名
      showSetPwd: false, // 是否显示修改密码按钮
      alarmList: []  //报警列表
    }
  },
  computed: {
    ...mapGetters([
      'sidebar',
      'avatar',
      'currentSystem',
      'systems',
      'alarmInfo'
    ])
  },
  created() {
    this.fetchAlarmList()
    if (!this.baseConfig.singleSys) {
      this.getSystems()
    }
  },
  mounted() {
    document.addEventListener('visibilitychange', this.handleTabVisibilityChange)
    this.initWebSocket()
    // this.$refs.alarmRef.initDialog({
    //   message: '浓度超限',
    //   type: 'alarm',
    //   deviceNo: '3C2023010008',
    //   value: '110.0',
    // })
    setInterval(() => {
      this.fetchAlarmList()
    }, 1000 * 30)
  },
  methods: {
    initWebSocket() {
      // 当用户id时在加载websocket
      if (this.$store.getters.id) {
        console.log('初始化websocket')
        const that = this
        this.$store.dispatch('initWebSocket', that)
      }
    },
    toggleSideBar() {
      this.$store.dispatch('ToggleSideBar')
    },
    logout() {
      this.$store.dispatch('LogOut').then(() => {
        this.$router.push({
          path: '/login'
        })
        // location.reload() // 为了重新实例化vue-router对象 避免bug
      })
    },
    resetPwd() {
      this.showSetPwd = true
      this.$refs.retPwd.initDialog(true)
    },
    backToIndex() {
      const url = this.baseConfig.mainPage
      window.location.href = url
    },
    // 切换子系统
    handleCommand(command) {
      console.log('切换子系统:' + command.name)
      const params1 = `?token=${this.$store.getters.token}`
      const params = `?sys=${command.name}&url=${command.url}&code=${command.code}&token=${this.$store.getters.token}`
      // 判断系统是不是http的，如果是则打开新窗口
      if (command.url.indexOf('http') > -1) {
        // 取token
        if (this.baseConfig.sameWindow) {
          window.location.href = command.url + params1
        } else {
          window.open(command.url + params1, '_blank')
        }
      } else {
        // 取token
        if (this.baseConfig.sameWindow) {
          window.location.href = this.baseConfig.mainPage + command.url + params
        } else {
          window.open(this.baseConfig.mainPage + command.url + params, '_blank')
        }
      }
    },
    // 获取子系统
    getSystems() {
      this.$store.dispatch('GetSystems').then(() => {
        console.log('获取子系统列表成功-appHeader')
      })
    },
    fetchAlarmList() {
      getAlarmList({ offset: 1, limit: 99, status: '1' }).then((res) => {
        // console.log(res.data)
        this.alarmList = res.data.rows
      })
    },
    alarmDetail() {
      this.$router.push({
        path: '/alarmNow'
      })
    },
    handleTabVisibilityChange() {
      if (document.visibilityState === 'visible') {
        console.log('页面被切回来,appheader')
        // 执行当Tab回到前台时的逻辑
      } else if (document.visibilityState === 'hidden') {
        console.log('页面被切走,appheader')
      }
    }
  },
  watch: {
    alarmInfo: {
      handler(newVal) {
        if (newVal.type === 'alarm') {
          this.$refs.alarmRef.initDialog(newVal)
          this.fetchAlarmList()
        }
        console.log(newVal, '报警消息')
      },
      deep: true
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
h3 {
  margin-left: 24px;
  display: inline-block;
  float: left;
}

.alarm {
  height: 56px;
  display: inline-block;
  // float: right;
  z-index: 500;
  position: fixed;
  // margin-left: 60px;
  // top: 5px;
  color: #fff;
  font-size: 16px;
  right: 180px;
  line-height: 70px;

  .dropdown-wrapper {
    &:hover {
      cursor: pointer;
    }
  }
}

.alarm-icon {
  color: #F56C6C;
}

.dropdown-container {
  /*height: 50px;*/
  display: inline-block;
  float: right;
  z-index: 500;
  position: fixed;
  top: 0px;
  right: 35px;

  .dropdown-wrapper {
    cursor: pointer;
    margin-top: 5px;
    position: relative;
    line-height: initial;

    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 10px;
    }

    .el-icon-caret-bottom {
      font-size: 12px;
    }
  }
}

.systemSelect {
  height: 56px;
  display: inline-block;
  float: left;
  z-index: 500;
  position: fixed;
  margin-left: 60px;
  top: 5px;
  color: #fff;
  line-height: 56px;
}
</style>