<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, onlyOneChild.query)"
      >
        <el-menu-item
          :index="resolvePath(onlyOneChild.path)"
          @click="clickitem(onlyOneChild)"
          :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 in item.children"
        :key="child.path"
        :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";
import { mapGetters } from "vuex";
import router from '@/router';
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: "",
    },
  },
  computed: {
    ...mapGetters(["userId", 'sidebar']),
  },
  data() {
    this.onlyOneChild = null;
    return {};
  },
  methods: {
    clickitem (obj) {
      // this.$tab.refreshPage(item)
      const { path, query, matched } = router.currentRoute;
      if (obj === undefined) {
        matched.forEach((m) => {
          if (m.components && m.components.default && m.components.default.name) {
            if (!['Layout', 'ParentView'].includes(m.components.default.name)) {
              obj = { name: m.components.default.name, path: path, query: query };
            }
          }
        });
      }
      this.$store.dispatch('tagsView/delCachedView', obj).then(() => {
        const { path, query } = obj
        this.$router.replace({ path: '/' + path, query })
      })
    },
    hasOneShowingChild(children = [], parent) {
      if (!children) {
        children = [];
      }
      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, routeQuery) {
      if (isExternal(routePath)) {
        return routePath;
      }
      if (isExternal(this.basePath)) {
        if (routeQuery?.endsWith("#{userid}")) {
          return this.basePath + "?userId=" + this.userId;
        }
        return this.basePath;
      }
      if (routeQuery) {
        let query = JSON.parse(routeQuery);

        return { path: path.resolve(this.basePath, routePath), query: query };
      }
      return path.resolve(this.basePath, routePath);
    },
  },
};
</script>
