import {createBrowserRouter, redirect} from 'react-router';
import {initAuth} from '../features/auth/service';
import {isLoggedIn, hasRole} from '../stores/auth';
import {hasSeenOnboarding} from '../features/onboarding/storage';
import AuthenticatedLayout from '@/components/layout/AuthenticatedLayout';
import LoginPage from '../pages/login';
import DashboardPage from '../pages/dashboard';
import StatisticsPage from '../pages/statistics';
import ForbiddenPage from '../pages/forbidden';
import NotFoundPage from '../pages/not-found';
import ProductsPage from '../pages/products';
import PartnersPage from '../pages/partners';
import QuotationPage from '../pages/quotation';
import CardsPage from '../pages/cards';
import MembersPage from '../pages/members';
import SettingsPage from '../pages/settings';
import NotificationsPage from '../pages/notifications';
import OnboardingPage from '../pages/onboarding';

export const router = createBrowserRouter([
  // dev 전용: import.meta.env.DEV가 false인 프로덕션 빌드에선 이 배열 항목과
  // 내부 import()가 통째로 트리셰이킹되어 번들/라우트에 포함되지 않는다.
  ...(import.meta.env.DEV
    ? [
        {
          path: 'dev/design',
          lazy: async () => ({
            Component: (await import('../pages/dev/dev-design')).default,
          }),
        },
      ]
    : []),
  {
    index: true,
    loader: () => redirect('/dashboard'),
  },
  {
    path: 'login',
    loader: async () => {
      await initAuth();
      if (isLoggedIn()) return redirect('/dashboard');
      return null;
    },
    Component: LoginPage,
  },
  {
    path: 'forbidden',
    Component: ForbiddenPage,
  },
  {
    path: 'onboarding',
    loader: async ({request}) => {
      await initAuth();
      if (!isLoggedIn()) {
        const url = new URL(request.url);
        const from = encodeURIComponent(url.pathname + url.search);
        return redirect(`/login?redirect=${from}`);
      }
      return null;
    },
    Component: OnboardingPage,
  },
  {
    loader: async ({request}) => {
      await initAuth();
      if (!isLoggedIn()) {
        const url = new URL(request.url);
        const from = encodeURIComponent(url.pathname + url.search);
        return redirect(`/login?redirect=${from}`);
      }
      // 최초 로그인 유저는 온보딩으로. 완료·건너뛰기 시 flag 저장되어 이후엔 통과.
      if (!hasSeenOnboarding()) {
        return redirect('/onboarding');
      }
      return null;
    },
    Component: AuthenticatedLayout,
    children: [
      {path: 'dashboard', Component: DashboardPage},
      {path: 'statistics', Component: StatisticsPage},
      {path: 'products', Component: ProductsPage},
      {path: 'partners', Component: PartnersPage},
      {path: 'quotation', Component: QuotationPage},
      {path: 'cards', Component: CardsPage},
      {path: 'notifications', Component: NotificationsPage},
      {
        // 최고관리자 전용. 자식 loader 는 부모와 병렬 실행되므로 여기서도 initAuth 를 기다린다(멱등).
        path: 'members',
        loader: async () => {
          await initAuth();
          return hasRole('최고관리자') ? null : redirect('/forbidden');
        },
        Component: MembersPage,
      },
      {
        // 최고관리자 전용. 회사 브랜딩/용어/커스텀필드 설정. (자식 loader 는 부모와 병렬 → initAuth 대기 필수)
        path: 'settings',
        loader: async () => {
          await initAuth();
          return hasRole('최고관리자') ? null : redirect('/forbidden');
        },
        Component: SettingsPage,
      },
    ],
  },
  {
    path: '*',
    Component: NotFoundPage,
  },
]);