<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
        <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click='logout'>退出登录</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
        <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
          <!-- 一级菜单模板区域 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>

        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subitem.path" v-for="subitem in item.children" :key="subitem.id" @click="saveNavState('/' + subitem.path)">
          <template slot="title">
            <i class="el-icon-menu"></i>
            <span>{{subitem.authName}}</span>
          </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 右侧主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 清空token值
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    //   console.log(res)
    },
    // 折叠菜单
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 二级菜单选中高亮
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath),
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}

.el-header {
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    background-color: #373d41;
    > div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}

.el-aside {
    background-color: #333744;
    .el-menu {
        border-right: 0;
    }
}

.el-main {
    background-color: #eaedf1;
}

.iconfont {
    margin-right: 10px;
}

.toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>