<template>
  <div class="tabs-box">
    <div class="tabs-menu">
      <el-tabs v-model="tabsMenuValue" type="card" @tab-click="tabClick" @tab-remove="tabRemove">
        <el-tab-pane v-for="item in tabsMenuList" :key="item.path" :label="item.title" :name="item.path" :closable="item.close">
          <template #label>
            <el-icon v-if="item.icon && tabsIcon" class="tabs-icon">
              <component :is="item.icon" />
            </el-icon>
            {{ item.title }}
          </template>
        </el-tab-pane>
      </el-tabs>
      <MoreButton />
    </div>
  </div>
</template>

<script setup lang="ts">
import Sortable from "sortablejs";
import { ref, computed, watch, onMounted } from "vue";
import { useRoute, useRouter } from "vue-router";
import { useGlobalStore } from "@/stores/modules/global";
import { useTabsStore } from "@/stores/modules/tabs";
import { useKeepAliveStore } from "@/stores/modules/keepAlive";
import { useAuthStore } from "@/stores/modules/auth";
import { TabsPaneContext, TabPaneName } from "element-plus";
import MoreButton from "./components/MoreButton.vue";
import { HOME_URL } from "@/config";
import { localGet } from "@/utils";

const TABS_OWNER_KEY = "geeker-tabs-owner";

const route = useRoute();
const router = useRouter();
const tabStore = useTabsStore();
const keepAliveStore = useKeepAliveStore();
const authStore = useAuthStore();
const globalStore = useGlobalStore();

const tabsMenuValue = ref(route?.fullPath || "");
const tabsMenuList = computed(() => tabStore.tabsMenuList);
const tabsIcon = computed(() => globalStore.tabsIcon);

onMounted(() => {
  // 若当前用户与持久化标签所属用户不一致，清空标签，避免展示其它系统的标签
  const currentUserId = String(localGet("geeker-user")?.userInfo?.id ?? "");
  const storedOwner = window.localStorage.getItem(TABS_OWNER_KEY) ?? "";
  if (currentUserId && currentUserId !== storedOwner) {
    tabStore.setTabs([]);
    keepAliveStore.setKeepAliveName([]);
    window.localStorage.setItem(TABS_OWNER_KEY, currentUserId);
  }
  tabsDrop();
  initTabs();
});

// 监听路由的变化（防止浏览器后退/前进不变化 tabsMenuValue）
watch(
  () => route.fullPath,
  () => {
    // 检查 route 和 route.meta 是否存在
    if (!route || !route.meta || !route.fullPath) return;
    if (route.meta.isFull) return;
    tabsMenuValue.value = route.fullPath;
    const tabsParams = {
      icon: route.meta.icon as string,
      title: route.meta.title as string,
      path: route.fullPath,
      name: route.name as string,
      close: !route.meta.isAffix,
      isKeepAlive: route.meta.isKeepAlive as boolean
    };
    tabStore.addTabs(tabsParams);
  },
  { immediate: true }
);

// 初始化需要固定的 tabs
const initTabs = () => {
  authStore.flatMenuListGet.forEach(item => {
    if (item.meta.isAffix && !item.meta.isHide && !item.meta.isFull) {
      const tabsParams = {
        icon: item.meta.icon,
        title: item.meta.title,
        path: item.path,
        name: item.name,
        close: !item.meta.isAffix,
        isKeepAlive: item.meta.isKeepAlive
      };
      tabStore.addTabs(tabsParams);
    }
  });
};

// tabs 拖拽排序
const tabsDrop = () => {
  Sortable.create(document.querySelector(".el-tabs__nav") as HTMLElement, {
    draggable: ".el-tabs__item",
    animation: 300,
    onEnd({ newIndex, oldIndex }) {
      const tabsList = [...tabStore.tabsMenuList];
      const currRow = tabsList.splice(oldIndex as number, 1)[0];
      tabsList.splice(newIndex as number, 0, currRow);
      tabStore.setTabs(tabsList);
    }
  });
};

// Tab Click
const tabClick = (tabItem: TabsPaneContext) => {
  const fullPath = tabItem.props.name as string;
  router.push(fullPath);
};

// Remove Tab
const tabRemove = (fullPath: TabPaneName) => {
  // 判断是否为最后一个标签页
  if (tabStore.tabsMenuList.length === 1) {
    if (HOME_URL == fullPath) {
      return false;
    }
    tabStore.removeTabs(fullPath as string, route && route.fullPath ? fullPath == route.fullPath : false);
    router.push(HOME_URL);
  } else {
    tabStore.removeTabs(fullPath as string, route && route.fullPath ? fullPath == route.fullPath : false);
  }
};
</script>

<style scoped lang="scss">
@import "./index";
</style>
