import 'package:go_router/go_router.dart';

import '../core/di/injection_container.dart';
import '../features/auth/presentation/pages/login_page.dart';
import '../features/auth/presentation/pages/register_page.dart';
import '../features/auth/presentation/viewmodels/auth_viewmodel.dart';
import '../features/tasks/presentation/pages/daily_agenda_page.dart';
import '../features/tasks/presentation/pages/calendar_page.dart';
import '../features/tasks/presentation/pages/task_form_page.dart';
import '../features/settings/presentation/pages/settings_page.dart';

class AppRouter {
  static GoRouter? _router;

  static GoRouter get router {
    _router ??= _createRouter();
    return _router!;
  }

  static GoRouter _createRouter() {
    return GoRouter(
      initialLocation: '/',
      redirect: (context, state) {
        final authViewModel = getIt<AuthViewModel>();
        final isAuthenticated = authViewModel.isAuthenticated;
        final isAuthRoute =
            state.matchedLocation == '/login' || state.matchedLocation == '/register';

        if (authViewModel.state == AuthState.initial) {
          return null;
        }

        if (!isAuthenticated && !isAuthRoute) {
          return '/login';
        }

        if (isAuthenticated && isAuthRoute) {
          return '/';
        }

        return null;
      },
      refreshListenable: getIt<AuthViewModel>(),
      routes: [
        GoRoute(
          path: '/login',
          name: 'login',
          builder: (context, state) => const LoginPage(),
        ),
        GoRoute(
          path: '/register',
          name: 'register',
          builder: (context, state) => const RegisterPage(),
        ),
        GoRoute(
          path: '/',
          name: 'daily',
          builder: (context, state) {
            final dateStr = state.uri.queryParameters['date'];
            return DailyAgendaPage(initialDate: dateStr);
          },
        ),
        GoRoute(
          path: '/calendar',
          name: 'calendar',
          builder: (context, state) => const CalendarPage(),
        ),
        GoRoute(
          path: '/task/new',
          name: 'task-new',
          builder: (context, state) {
            final dateStr = state.uri.queryParameters['date'];
            return TaskFormPage(initialDate: dateStr);
          },
        ),
        GoRoute(
          path: '/task/:id/edit',
          name: 'task-edit',
          builder: (context, state) {
            final taskId = state.pathParameters['id']!;
            return TaskFormPage(taskId: taskId);
          },
        ),
        GoRoute(
          path: '/settings',
          name: 'settings',
          builder: (context, state) => const SettingsPage(),
        ),
      ],
    );
  }
}