import 'package:flutter/foundation.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../core/app_keys.dart';
import '../features/auth/application/session_controller.dart';
import '../features/auth/presentation/login_page.dart';
import '../features/auth/presentation/register_page.dart';
import '../features/notice/presentation/notice_center_page.dart';
import '../features/order/presentation/order_detail_page.dart';
import 'tabs_page.dart';

/// 会话语义变化时驱动 go_router 重新执行 `redirect`。
class _SessionRefresh extends ChangeNotifier {
  void bump() => notifyListeners();
}

/// 路由表，对应源 `pages.json` 的 5 个页面。
///
/// 除登录/注册外，其余页面统一使用主题里的 `CupertinoPageTransitionsBuilder`
/// （新页面从右侧滑入），与源 `PageTransition.vue` 的表现一致。
final routerProvider = Provider<GoRouter>((ref) {
  final refresh = _SessionRefresh();
  ref.listen(sessionProvider, (_, _) => refresh.bump());
  ref.onDispose(refresh.dispose);

  return GoRouter(
    navigatorKey: AppKeys.rootNavigator,
    initialLocation: '/login',
    refreshListenable: refresh,
    redirect: (context, state) {
      final loggedIn = ref.read(sessionProvider).isLoggedIn;
      final atAuth =
          state.matchedLocation == '/login' || state.matchedLocation == '/register';
      if (!loggedIn) return atAuth ? null : '/login';
      if (atAuth) return '/tabs';
      return null;
    },
    routes: [
      GoRoute(path: '/login', builder: (context, state) => const LoginPage()),
      GoRoute(
        path: '/register',
        builder: (context, state) => const RegisterPage(),
      ),
      GoRoute(path: '/tabs', builder: (context, state) => const TabsPage()),

      // 消息中心：顶栏铃铛入口
      GoRoute(
        path: '/notice',
        builder: (context, state) => const NoticeCenterPage(),
      ),

      // 订单详情：source 为 repair|install|maintenance|survey
      GoRoute(
        path: '/order/:source/:id',
        builder: (context, state) => OrderDetailPage(
          source: state.pathParameters['source']!,
          id: int.parse(state.pathParameters['id']!),
        ),
      ),
    ],
  );
});