<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)"
          :class="{ 'submenu-title-noDropdown': !isNest }"
        >
          <div v-if="itmeIcon[onlyOneChild.meta.title]" class="div-img">
            <img :src="itmeIcon[onlyOneChild.meta.title]" alt="" />
          </div>
          <div v-if="itmeIcon[onlyOneChild.meta.title]" class="div-img-gl">
            <img :src="itmeIcon1[onlyOneChild.meta.title]" alt="" />
          </div>
          <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="child.path + 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: "",
    },
    sideTheme: {},
  },
  data() {
    this.onlyOneChild = null;
    return {
      itmeIcon: {
        首页: require("@/assets/images/home_N@1x.png"),
        患者档案: require("@/assets/images/dangan_n@1x.png"),
        诊疗档案: require("@/assets/images/zhenliao_n@1x.png"),
        随访档案: require("@/assets/images/suifang_n@1x.png"),
        我的: require("@/assets/images/me_n@1x.png"),
      },
      itmeIcon1: {
        首页: require("@/assets/images/home_S@1x.png"),
        患者档案: require("@/assets/images/dangan_s@1x.png"),
        诊疗档案: require("@/assets/images/zhenliao_s@1x.png"),
        随访档案: require("@/assets/images/suifang_s@1x.png"),
        我的: require("@/assets/images/me_s@1x.png"),
      },
    };
  },
  methods: {
    hasOneShowingChild(children = [], parent) {
      if (!children) {
        children = [];
      }
      const showingChildren = children.filter((item) => {
        if (item.hidden) {
          return false;
        }
        // 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)) {
        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>
<style scoped>
.div-img-gl {
  display: none;
}
.nest-menu .el-menu-item {
  height: 40px !important;
  line-height: 40px !important;
}

#app .sidebar-container .nest-menu .is-active {
  background-color: #fff !important;
}
#app .sidebar-container .nest-menu .is-active:hover {
  color: #fff !important;
}
</style>
