import { RouteRecordRaw } from 'vue-router';
import { storeToRefs } from 'pinia';
import pinia from '/@/stores/index';
import { useUserInfo } from '/@/stores/userInfo';
import { useRequestOldRoutes } from '/@/stores/requestOldRoutes';
import { Session } from '/@/utils/storage';
import { NextLoading } from '/@/utils/loading';
import { dynamicRoutes, notFoundAndNoPower } from '/@/router/route';
import { formatTwoStageRoutes, formatFlatteningRoutes, router } from '/@/router/index';
import { useRoutesList } from '/@/stores/routesList';
import { useTagsViewRoutes } from '/@/stores/tagsViewRoutes';
import { useMenuApi } from '../api/menu';
import { Menu } from '../model/api/menu';
import { toCamelCase } from '../utils/other';
import { Component, h, shallowRef } from 'vue';


// 后端控制路由

// 引入 api 请求接口
const menuApi = useMenuApi();

/**
 * 获取目录下的 .vue、.tsx 全部文件
 * @method import.meta.glob
 * @link 参考：https://cn.vitejs.dev/guide/features.html#json
 */
// const layouModules: any = import.meta.glob('../layout/routerView/*.{vue,tsx}');
// const viewsModules: any = import.meta.glob('../views/**/*.{vue,tsx}');
// const dynamicViewsModules: Record<string, Function> = Object.assign({}, { ...layouModules }, { ...viewsModules });
const modules = import.meta.glob('../views/modules/**/**.vue')

/**
 * 后端控制路由：初始化方法，防止刷新时路由丢失
 * @method NextLoading 界面 loading 动画开始执行
 * @method useUserInfo().setUserInfos() 触发初始化用户信息 pinia
 * @method useRequestOldRoutes().setRequestOldRoutes() 存储接口原始路由（未处理component），根据需求选择使用
 * @method setAddRoute 添加动态路由
 * @method setFilterMenuAndCacheTagsViewRoutes 设置路由到 pinia routesList 中（已处理成多级嵌套路由）及缓存多级嵌套数组处理后的一维数组
 */
export async function initBackEndControlRoutes() {
	// 界面 loading 动画开始执行
	if (window.nextLoading === undefined) NextLoading.start();
	// 无 token 停止执行下一步
	if (!Session.get('token')) return false;
	// 触发初始化用户信息 pinia
	// https://gitee.com/lyt-top/vue-next-admin/issues/I5F1HP
	await useUserInfo().setUserInfos();
	// 获取路由菜单数据
	const res = await menuApi.getMenu();
	// 无登录权限时，添加判断
	// https://gitee.com/lyt-top/vue-next-admin/issues/I64HVO
	if (res.data.length <= 0) return Promise.resolve(true);
	// 存储接口原始路由（未处理component），根据需求选择使用
	useRequestOldRoutes().setRequestOldRoutes(JSON.parse(JSON.stringify(res.data)));
	// 处理路由（component），替换 dynamicRoutes（/@/router/route）第一个顶级 children 的路由
	dynamicRoutes[0].children = [
		{
			path: '/home',
			name: 'home',
			component: () => import('/@/views/home/index.vue'),
			meta: {
				title: 'message.router.home',
				isLink: '',
				isHide: false,
				isKeepAlive: true,
				isAffix: true,
				isIframe: false,
				roles: ['admin', 'common'],
				icon: 'fa:home',
			},
		},
		{
			path: '/personal',
			name: 'personal',
			component: () => import('/@/views/personal/index.vue'),
			meta: {
				title: 'message.router.personal',
				isLink: '',
				isHide: true,
				isKeepAlive: true,
				isAffix: false,
				isIframe: false,
				roles: ['admin', 'common'],
				icon: 'iconfont icon-gerenzhongxin',
			},
		},
		...await backEndComponent(res.data)
	];
	// 添加动态路由
	await setAddRoute();
	// 设置路由到 pinia routesList 中（已处理成多级嵌套路由）及缓存多级嵌套数组处理后的一维数组
	await setFilterMenuAndCacheTagsViewRoutes();
}

/**
 * 设置路由到 pinia routesList 中（已处理成多级嵌套路由）及缓存多级嵌套数组处理后的一维数组
 * @description 用于左侧菜单、横向菜单的显示
 * @description 用于 tagsView、菜单搜索中：未过滤隐藏的(isHide)
 */
export async function setFilterMenuAndCacheTagsViewRoutes() {
	const storesRoutesList = useRoutesList(pinia);
	storesRoutesList.setRoutesList(dynamicRoutes[0].children as any);
	setCacheTagsViewRoutes();
}

/**
 * 缓存多级嵌套数组处理后的一维数组
 * @description 用于 tagsView、菜单搜索中：未过滤隐藏的(isHide)
 */
export function setCacheTagsViewRoutes() {
	const storesTagsView = useTagsViewRoutes(pinia);
	storesTagsView.setTagsViewRoutes(formatTwoStageRoutes(formatFlatteningRoutes(dynamicRoutes))[0].children);
}

/**
 * 处理路由格式及添加捕获所有路由或 404 Not found 路由
 * @description 替换 dynamicRoutes（/@/router/route）第一个顶级 children 的路由
 * @returns 返回替换后的路由数组
 */
export function setFilterRouteEnd() {
	let filterRouteEnd: any = formatTwoStageRoutes(formatFlatteningRoutes(dynamicRoutes));
	// notFoundAndNoPower 防止 404、401 不在 layout 布局中，不设置的话，404、401 界面将全屏显示
	// 关联问题 No match found for location with path 'xxx'
	filterRouteEnd[0].children = [...filterRouteEnd[0].children, ...notFoundAndNoPower];
	return filterRouteEnd;
}

/**
 * 添加动态路由
 * @method router.addRoute
 * @description 此处循环为 dynamicRoutes（/@/router/route）第一个顶级 children 的路由一维数组，非多级嵌套
 * @link 参考：https://next.router.vuejs.org/zh/api/#addroute
 */
export async function setAddRoute() {
	await setFilterRouteEnd().forEach((route: RouteRecordRaw) => {
		router.addRoute(route);
	});
}

/**
 * 请求后端路由菜单接口
 * @description isRequestRoutes 为 true，则开启后端控制路由
 * @returns 返回后端路由菜单数据
 */
export function getBackEndControlRoutes() {
	// 模拟 admin 与 test
	const stores = useUserInfo(pinia);
	const { userInfos } = storeToRefs(stores);
	const auth = userInfos.value.roles[0];
	// 管理员 admin
	if (auth === 'admin') return menuApi.getAdminMenu();
	// 其它用户 test
	else return menuApi.getTestMenu();
}

/**
 * 将指定组件设置自定义名称
 *
 * @param {String} name 组件自定义名称
 * @param {Component | Promise<Component>} component
 * @return {Component}
 */
 export function createCustomComponent (name: string, component: Component) {
  return {
    name,
		setup () {
			const component = shallowRef();
			return {
				component
			}
		},
    async created () {
      if (component instanceof Promise) {
        try {
          const module = await component
          this.component = module?.default
        } catch (error) {
          // console.error(`can not resolve component ${name}, error:`, error)
        }
        return
      }
      this.component = component
    },
    render () {
      return this.component ? h(this.component) : null
    },
  } as Component
}


/**
 * 重新请求后端路由菜单接口
 * @description 用于菜单管理界面刷新菜单（未进行测试）
 * @description 路径：/src/views/system/menu/component/addMenu.vue
 */
export async function setBackEndControlRefreshRoutes() {
	await getBackEndControlRoutes();
}

/**
 * 后端路由 component 转换
 * @param routes 后端返回的路由表数组
 * @returns 返回处理成函数后的 component
 */
export function backEndComponent(routes: Menu[]): Array<RouteRecordRaw> {
	if (!routes) return [];
	return routes.map((item) => {
		// if (item.component) item.component = dynamicImport(dynamicViewsModules, item.component as string);
		// item.children && backEndComponent(item.children); 
		const url = item.url.split('/').map(v => toCamelCase(v)).join('/')
		const component = modules[`../views/modules${url}.vue`] || modules[`../views/modules${url}/index.vue`]
		return {
			path: url,
			name: url,
			// component: component || dynamicImport(dynamicViewsModules, 'modules/index') as never,
			component: createCustomComponent(url, component ? component() : modules['../views/modules/index.vue']()),
			props: { type: item.url, authId: item.id },
			meta: {
				title: item.displayName,
				isLink: "",
				isHide: !item.visible,
				isKeepAlive: true,
				isAffix: false,
				isIframe: item.newWindow,
				// roles
				icon: item.icon ? item.icon.replace(/^fa-/, 'fa:') : ''
			},
			children: backEndComponent(item.children)
		};
	});
}

/**
 * 后端路由 component 转换函数
 * @param dynamicViewsModules 获取目录下的 .vue、.tsx 全部文件
 * @param component 当前要处理项 component
 * @returns 返回处理成函数后的 component
 */
export function dynamicImport(dynamicViewsModules: Record<string, Function>, component: string) {
	const keys = Object.keys(dynamicViewsModules);
	const matchKeys = keys.filter((key) => {
		const k = key.replace(/..\/views|../, '');
		return k.startsWith(`${component}`) || k.startsWith(`/${component}`);
	});
	if (matchKeys?.length === 1) {
		const matchKey = matchKeys[0];
		return dynamicViewsModules[matchKey];
	}
	if (matchKeys?.length > 1) {
		return false;
	}
}