<template>
  <div v-if="!item.hidden">
    <template
      v-if="hasOneShowingChild(item.children,item) && (!onlyOneChild.children||onlyOneChild.noShowingChildren)&&!item.alwaysShow"
    >
      <app-link v-if="onlyOneChild.meta" :to="resolvePath(onlyOneChild.path)">
        <el-menu-item
          :index="resolvePath(onlyOneChild.path)"
          :class="{'submenu-title-noDropdown':!isNest}"
        >
          <item
            :icon="onlyOneChild.meta.icon||(item.meta&&item.meta.icon)"
            :title="onlyOneChild.meta.title"
          />
        </el-menu-item>
      </app-link>
    </template>

    <el-submenu v-else ref="subMenu" :index="resolvePath(item.path)" popper-append-to-body>
      <template slot="title">
        <item v-if="item.meta" :icon="item.meta && item.meta.icon" :title="item.meta.title" />
      </template>
      <sidebar-item
        v-for="(child,index) in item.children"
        :key="index"
        :is-nest="true"
        :item="child"
        :base-path="resolvePath(child.path)"
        class="nest-menu"
      />

    </el-submenu>

  </div>
</template>

<script>
import path from 'path'
import { isExternal } from '@/utils/validate'
import Item from './Item'
import AppLink from './Link'
import FixiOSBug from './FixiOSBug'

export default {
  name: 'SidebarItem',
  components: { Item, AppLink },
  mixins: [FixiOSBug],
  props: {
    // route object
    item: {
      type: Object,
      required: true
    },
    isNest: {
      type: Boolean,
      default: false
    },
    basePath: {
      type: String,
      default: ''
    }
  },
  data () {
    // To fix https://github.com/PanJiaChen/vue-admin-template/issues/237
    // TODO: refactor with render function
    this.onlyOneChild = null
    return {}
  },
  watch: {
    item: (n, o) => {
      console.log('sidebaritem child', n)
    }
  },
  methods: {
    hasOneShowingChild (children = [], parent) {
      const showingChildren = children.filter(item => {
        if (item.hidden) {
          return false
        } else {
          // Temp set(will be used if only has one showing child)
          this.onlyOneChild = item
          return true
        }
      })

      // When there is only one child router, the child router is displayed by default
      if (showingChildren.length === 1) {
        return true
      }

      // Show parent if there are no child router to display
      if (showingChildren.length === 0) {
        this.onlyOneChild = { ...parent, path: '', noShowingChildren: true }
        return true
      }

      return false
    },
    resolvePath (routePath) {
      if (isExternal(routePath)) {
        return routePath
      }
      if (isExternal(this.basePath)) {
        return this.basePath
      }

      return path.resolve(this.basePath, routePath)
    }
  }
}
</script>
<style lang="less">
  .el-submenu{
  // padding:4px 12px;
  }
  .el-submenu .el-submenu__title{
    padding-left:29px !important;
  }

    //设置鼠标悬停时el-submenu的样式
    .el-submenu .el-submenu__title:hover{
        background-color: #3f9b6a1a !important;
         border-radius:4px;

          color: #3F9B6A !important;
    }
</style>

<style lang="scss" scoped>
.tabLink:last-of-type {
  height: 200px;

}
.el-submenu__icon-arrow{
  right:20px;
}
 .el-menu-item.is-active {
        background-color: #3F9B6A !important;
        color: #fff !important;
        border-radius:4px;
       margin: 0 12px 6px;

    }
    .el-menu-item.is-active:hover{
           background-color: #3F9B6A !important;
             border-radius:4px;
              color: #fff !important;
           //less语法，实现鼠标悬停时icon变色
       }
      .el-menu-item{
         padding:0px 20px 0 40px !important;
         margin:5px 0;
         border-radius:4px;
         border: 1px solid transparent;
         margin: 0 12px 6px;
         color:#525050  !important;
      }

      ::v-deep .el-submenu__title{
         font-weight:600;
      }
     .el-menu-item:hover{
            background-color: #DEEBE2 !important;
              border-radius:4px;
               color: #3F9B6A !important;
            //less语法，实现鼠标悬停时icon变色
        }
 .tabLink{
    font-weight:500;
 }

::v-deep .el-menu-item{
height:36px;
line-height:31px;
 }
 ::v-deep .el-submenu__title{
 height:36px;
 line-height:32px;
  }
   ::v-deep .el-submenu{
     // padding:0 10px !important;
  }
::v-deep .el-submenu__title{
      .sub-el-icon {
         display: none;
      }
    }
    ::v-deep .el-submenu__title{
          .svg-icon {
             display: none;
          }
        }

::v-deep .el-menu-item{
      .sub-el-icon {
         display: none;
      }
    }
    ::v-deep .el-menu-item{
          .svg-icon {
             display: none;
          }
        }
        ::v-deep .el-menu-item{
              .svg-icon {
                 display: none;
              }
            }

</style>
