<template>
  <el-container class="home-container" >
    <el-header class="navigation">
      <div>
        <!-- <img src="../assets/images/logo.png" /> -->
        <span>贷后监管系统</span>
      </div>
      <el-button type="info" @click="logout" class="butt">退出</el-button>
    </el-header>
    <el-container >
      <!-- 当打开左侧菜单时 宽度为200, 当不打开时为默认值-->
      <el-aside :width="isCollapse ? '64px' : '200px' " class="sidemenu">
        <!-- 这是左侧菜单-->

        <!--定义折叠项-->
        <div class="leftCollapse" @click="collspseClick" style="background-color: #55557f ;color: #000000;">|||</div>

        <!--
            1.background-color="#2C3E50"
            2.text-color="#fff" 文本颜色
            3.active-text-color="#4094ff"
            4.unique-opened=true 是否只打开一个菜单
            5.collapse  是否折叠
            6.collapse-transition 折叠时是否展现动画效果
            7.default-active  默认选中的菜单
            8.router 启动以path路径当做请求地址
         -->

        <el-menu background-color="#55557f"  text-color="#ffffff"
                 active-text-color="#ffff00"
                 unique-opened
        :collapse="isCollapse" :collapse-transition="isCollapseTransition" router  :default-active="defaultActive">

          <!-- 定义一级菜单 -->
          <el-submenu :index="menu.id+''" v-for="menu in menuList" :key="menu.id">
            <!-- 定义一级菜单模版 -->
            <template slot="title">
              <!-- 定义左侧图标-->
              <!-- <i :class="menuIcon[menu.id]"></i> -->
              <i class="el-icon-star-on"></i>
              <!-- 定义菜单名称-->
              <span>{{menu.name}}</span>
            </template>
            <!-- 定义二级菜单 -->
            <el-menu-item :index="childrenMenu.path" v-for="childrenMenu in menu.children" :key="childrenMenu.id"
            @click="defaultActiveMenu(childrenMenu.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{childrenMenu.name}}</span>
              </template>
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>

      <!-- 定义主页面结构-->
      <el-main>
       <!-- <el-container class="home-container">

        </el-container> -->
        <!-- 定义路由展现页面-->
        <router-view></router-view>
      </el-main>
    </el-container>

  </el-container>
</template>

<script>
export default {
  // 初始化函数
  created () {
    this.getMenuList()
    // 设定模式选中按钮
    this.defaultActive = window.sessionStorage.getItem('activeMenu')
  },
  data () {
    return {
      menuList: [],
      menuIcon: {
        1: 'iconfont iconuser',
        3: 'iconfont iconshangpin',
        5: 'iconfont iconicon--copy',
        7: 'iconfont iconquanxian',
        8: 'iconfont iconziyuan'
      },
      // 定义是否折叠
      isCollapse: false,
      // 是否展现折叠动态效果
      isCollapseTransition: false,
      // 定义默认高亮
      defaultActive: '',
      user: ''

    }
  },
  methods: {
    logout () {
      // 1.删除session中的记录
      window.sessionStorage.clear()
      // 2.要求跳转到用户登录页面
      this.$router.push('/login')
    },
    async getMenuList () {
      // 1.查询左侧菜单
      const { data: result } =
          await this.$http.get('/rights/getRightsList')
      if (result.status !== 200) return this.$message.error('获取权限列表失败')
      this.menuList = result.data
    },
    // 设定左侧折叠展开效果
    collspseClick () {
      this.isCollapse = !this.isCollapse
    },
    defaultActiveMenu (activeMenu) {
      // 为了实现返回之后的选中效果,应该将数据保存到第三方中sessionStory
      window.sessionStorage.setItem('activeMenu', activeMenu)
      this.defaultActive = activeMenu
    }
  },

  mounted () {
    this.user = window.sessionStorage.getItem('token').substr(32)
  }
}
</script>

<!-- 防止样式重叠 -->
<style lang="less" scoped>
  .el-header {
    background-color: #55ffff;
    display: flex; //灵活的盒子容器
    justify-content: space-between; //左右对齐
    align-items: center; //文本元素居中对齐
    color: #232323; //设定字体颜色
    padding-left: 1px;

    >div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
        font-size: 25px; //设定字体高度
      }
    }
  }

  .el-aside {
    background-color: #55007f;

    .el-menu {
      border-right: none;
    }
  }

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

  .home-container {
    height: 100%;
    width: 100%;

  }

  .iconfont {
    margin-right: 8px;
  }
  // 导航栏渐变
.navigation{
  background:linear-gradient(45deg,#55557f,#ffffff);
  color: #ffffff;
}
// 按钮
.butt{
  background-color: #cecece;
  border-color:  #cecece;

}
.sidemenu{
  background-color: #55557f;
}
  //定义折叠项
  .leftCollapse {
    //设定背景色
    background-color: #708090;
    //定义字体大小
    font-size: 10px;
    //定义行高
    line-height: 30px;
    //定义颜色
    color: #FFFFFF;
    //设置居中
    text-align: center;
    //设定字符间距
    letter-spacing: 4px;
    //鼠标放上之后设置为小手
    cursor: pointer;
  }
 .el-icon-star-on{
   color: white;
 }
 .el-icon-menu{
   color: white;
 }
</style>
