/**
 * 通过menus 计算出asyncRoutes 动态路由
 */
import { RouteRecordRaw } from "vue-router"
import { asyncComponentsType } from "@/router/routers"
export const generateAsyncMenusAsyncRoutes = (menus: menuType[], components: asyncComponentsType) => {
   return {
      asyncRoutes: generateAsyncRoutes(menus, components),
      asyncMenus: generateAsyncMenus(menus)
   }
}
export const generateAsyncRoutes = (menus: menuType[], components: asyncComponentsType) => {
   function menusAsyncRoutes(menus: menuType[]) {
      const layoutRoutes: RouteRecordRaw[] = []
      const singlepageRoutes: RouteRecordRaw[] = []
      for (const menu of menus) {
         const { path, component, meta } = menu
         if (menu.children && menu.children.length > 0) {
            const asyncRoutes = menusAsyncRoutes(menu.children)
            layoutRoutes.push(...asyncRoutes.layoutRoutes)
            singlepageRoutes.push(...asyncRoutes.singlepageRoutes)
         } else {
            ;(meta.routeType === "layout" ? layoutRoutes : singlepageRoutes).push({
               path: path,
               name: component,
               component: components[component],
               meta
            })
         }
      }
      return {
         layoutRoutes,
         singlepageRoutes
      }
   }
   const { layoutRoutes, singlepageRoutes } = menusAsyncRoutes(menus)
   const asyncRoutes: RouteRecordRaw[] = [
      {
         path: "/layout",
         name: "layout",
         redirect: "/noRedirect",
         component: components["layout"],
         children: layoutRoutes
      },
      ...singlepageRoutes
   ]
   //默认获取第一个菜单为首页
   function getHomePageMenus(menus: menuType[]): string {
      const menu = menus[0]
      if (!menu) {
         return "/noRedirect"
      } else if (menu.children && menu.children.length) {
         return getHomePageMenus(menu.children)
      } else {
         return menu.path
      }
   }
   const homePagePath = getHomePageMenus(menus)
   //添加首页
   asyncRoutes.push({
      path: "/",
      redirect: homePagePath
   })
   //添加 404
   asyncRoutes.push({
      path: "/:pathMatch(.*)*",
      name: "errorPage",
      component: () => import("@/viewsframe/errorPage")
   })
   return asyncRoutes
}
export const generateAsyncMenus = (menus: menuType[]) => {
   return filterMenus(menus)
   function filterMenus(menus: menuType[]) {
      return menus.filter(item => {
         if (item.children.length) {
            item.children = filterMenus(item.children)
         }
         return item.meta.routeType === "layout"
      })
   }
}