import { createRouter, createWebHistory } from "vue-router";
import { useAuthStore } from "@/modules/admin/stores/auth";

const router = createRouter({
  history: createWebHistory(import.meta.env.BASE_URL),
  routes: [
    {
      path: "/",
      name: "public-home",
      meta: { title: "首页" },
      component: () => import("@/modules/public/views/PublicHome.vue"),
    },
    {
      path: "/admin/login",
      name: "admin-login",
      meta: { title: "管理后台登录", guestOnly: true },
      component: () => import("@/modules/admin/views/LoginView.vue"),
    },
    {
      path: "/admin",
      component: () => import("@/modules/admin/layout/AdminLayout.vue"),
      meta: { requiresAuth: true },
      children: [
        {
          path: "",
          redirect: { name: "admin-users" },
        },
        {
          path: "users",
          name: "admin-users",
          meta: { title: "用户管理", permission: "perm:user" },
          component: () => import("@/modules/admin/views/users/UserManage.vue"),
        },
        {
          path: "roles",
          name: "admin-roles",
          meta: { title: "角色管理", permission: "perm:role" },
          component: () => import("@/modules/admin/views/roles/RoleManage.vue"),

        },
        {
          path: "permissions",
          name: "admin-permissions",
          meta: { title: "权限管理", permission: "perm:config" },
          component: () =>
            import("@/modules/admin/views/permissions/PermissionManage.vue"),
        },
        {
          path: "settings",
          name: "admin-settings",
          meta: { title: "系统设置", permission: "system:" },
          component: () =>
            import("@/modules/admin/views/settings/SettingManage.vue"),
        },
      ],
    },
  ],
});

router.beforeEach(async (to, _from, next) => {
  const auth = useAuthStore();
  const title = (to.meta.title as string) || "BookSystem";
  document.title = `${title} · BookSystem`;

  if (to.meta.requiresAuth && !auth.isAuthenticated) {
    next({
      name: "admin-login",
      query: { redirect: to.fullPath },
    });
    return;
  }

  if (to.meta.guestOnly && auth.isAuthenticated) {
    if (!auth.user || auth.permissions.length === 0) {
      try {
        await auth.fetchProfile();
        await auth.fetchPermissions();
      } catch {
        auth.logout();
        next({ name: "admin-login" });
        return;
      }
    }
    next({ name: "admin-users" });
    return;
  }

  const requiredPermission = to.meta.permission as string;
  if (requiredPermission && auth.isAuthenticated && auth.permissions.length > 0) {
    const hasPermission = auth.permissions.some(p =>
      p.code.startsWith(requiredPermission)
    );
    if (!hasPermission) {
      next({ name: "admin-users" });
      return;
    }
  }

  next();
});

export default router;