<template>
  <!-- eslint-disable-next-line vue/no-multiple-template-root -->
  <template v-if="hasOneShowingChild(item.children,item) && (!onlyOneChild.children||onlyOneChild.noShowingChildren)&&!item.alwaysShow">
    <app-link v-if="onlyOneChild.meta" :to="item">
      <z-menu-item v-if="!item.hidden" :key-val="resolvePath(item.path)">
        <!-- <template #icon>
            <i class="iconfont" :class="item.meta.icon" />
          </template> -->
        <template v-if="item.meta && item.meta.title">
          {{ item.meta.title }}
        </template>
      </z-menu-item>
    </app-link>
  </template>
  <z-sub-menu
    v-else
    ref="subMenu"
    :key-val="resolvePath(item.path)"
    popper-append-to-body
  >
    <template #icon>
      <SettingOutlined />
    </template>
    <template #title>{{ item.meta?.title }}</template>
    <sidebar-item
      v-for="(child, i) in item.children"
      :key="child.path+'_'+i"
      :is-nest="true"
      :item="child"
      :base-path="resolvePath(item.path)"
      class="nest-menu"
    />
  </z-sub-menu>
</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: { AppLink },
  // 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 {}
  },
  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>
