<template>
	<el-container class="layout-container flex-center">
		<LayoutHeader />
		<el-container class="layout-mian-height-50">
			<LayoutAside />
			<div class="flex-center layout-backtop">
				<LayoutTagsView v-if="isTagsview" />
				<LayoutMain ref="layoutMainRef" />
			</div>
		</el-container>
	</el-container>
</template>

<script setup lang="ts" name="layoutClassic">
import {useThemeConfig} from '/@/stores/themeConfig';

// 引入组件
const LayoutAside = defineAsyncComponent(() => import('/@/layout/component/aside.vue'));
const LayoutHeader = defineAsyncComponent(() => import('/@/layout/component/header.vue'));
const LayoutMain = defineAsyncComponent(() => import('/@/layout/component/main.vue'));
const LayoutTagsView = defineAsyncComponent(() => import('/@/layout/navBars/tagsView/tagsView.vue'));

// 定义变量内容
const layoutMainRef = ref<InstanceType<typeof LayoutMain>>();
const route = useRoute();
const storesThemeConfig = useThemeConfig();
const { themeConfig } = storeToRefs(storesThemeConfig);

// 判断是否显示 tasgview
const isTagsview = computed(() => {
  let { layout } = themeConfig.value;
  // 经典模式首页没有tagview
  if(layout === 'classic' && route.path === '/home'){
    return false
  }
	return themeConfig.value.isTagsview;
});
// 重置滚动条高度，更新子级 scrollbar
const updateScrollbar = () => {
	layoutMainRef.value?.layoutMainScrollbarRef.update();
};
// 重置滚动条高度，由于组件是异步引入的
const initScrollBarHeight = () => {
	nextTick(() => {
		setTimeout(() => {
			updateScrollbar();
			// '!' not null 断言操作符，不执行运行时检查
			layoutMainRef.value!.layoutMainScrollbarRef.wrapRef.scrollTop = 0;
		}, 500);
	});
};
// 页面加载时
onMounted(() => {
	initScrollBarHeight();
});
// 监听路由的变化，切换界面时，滚动条置顶
watch(
	() => route.path,
	() => {
		initScrollBarHeight();
	}
);
// 监听 themeConfig 配置文件的变化，更新菜单 el-scrollbar 的高度
watch(
	themeConfig,
	() => {
		updateScrollbar();
	},
	{
		deep: true,
	}
);
</script>
