water-management-system/mobile-app/lib/config/app_routes.dart

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import '../features/auth/pages/login_page.dart';
import '../features/auth/services/token_service.dart';
import '../features/main_shell/pages/main_shell_page.dart';
import '../features/revenue/pages/bill_list_page.dart';

/// 应用路由配置
class AppRoutes {
  static const String login = '/login';
  static const String main = '/main';
  static const String bills = '/bills';

  static GoRouter createRouter() {
    return GoRouter(
      initialLocation: login,
      redirect: (BuildContext context, GoRouterState state) async {
        final tokenService = TokenService();
        final isLoggedIn = await tokenService.isLoggedIn();
        final isGoingToLogin = state.matchedLocation == login;

        if (!isLoggedIn && !isGoingToLogin) return login;
        if (isLoggedIn && isGoingToLogin) return main;
        return null;
      },
      routes: [
        GoRoute(
          path: login,
          builder: (context, state) => const LoginPage(),
        ),
        GoRoute(
          path: main,
          builder: (context, state) => const MainShellPage(),
        ),
        GoRoute(
          path: bills,
          builder: (context, state) => const BillListPage(),
        ),
      ],
    );
  }
}