import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'features/auth/auth_screen.dart';
import 'features/clarification/clarification_screen.dart';
import 'features/handoff/handoff_screen.dart';
import 'features/order_detail/order_detail_screen.dart';
import 'features/orders/orders_list_screen.dart';
import 'features/picking/picking_screen.dart';
import 'features/slots/slots_screen.dart';
import 'features/sorting/sorting_screen.dart';
import 'core/theme/app_theme.dart';

final _router = GoRouter(
  initialLocation: '/orders',
  redirect: (context, state) async {
    final prefs = await SharedPreferences.getInstance();
    final token = prefs.getString('auth_token');
    final onAuth = state.matchedLocation == '/auth';
    if (token == null && !onAuth) return '/auth';
    if (token != null && onAuth) return '/orders';
    return null;
  },
  routes: [
    GoRoute(
      path: '/auth',
      builder: (_, __) => const AuthScreen(),
    ),
    GoRoute(
      path: '/orders',
      builder: (_, __) => const OrdersListScreen(),
      routes: [
        GoRoute(
          path: ':orderId',
          builder: (_, state) => OrderDetailScreen(
            orderId: int.parse(state.pathParameters['orderId']!),
          ),
          routes: [
            GoRoute(
              path: 'picking/:segmentId',
              builder: (_, state) => PickingScreen(
                orderId: int.parse(state.pathParameters['orderId']!),
                segmentId: int.parse(state.pathParameters['segmentId']!),
              ),
            ),
            GoRoute(
              path: 'sorting',
              builder: (_, state) => SortingScreen(
                orderId: int.parse(state.pathParameters['orderId']!),
              ),
            ),
            GoRoute(
              path: 'clarification',
              builder: (_, state) => ClarificationScreen(
                orderId: int.parse(state.pathParameters['orderId']!),
              ),
            ),
            GoRoute(
              path: 'slots',
              builder: (_, state) => SlotsScreen(
                orderId: int.parse(state.pathParameters['orderId']!),
              ),
            ),
            GoRoute(
              path: 'handoff',
              builder: (_, state) => HandoffScreen(
                orderId: int.parse(state.pathParameters['orderId']!),
              ),
            ),
          ],
        ),
      ],
    ),
  ],
);

class VelmartPickerApp extends StatelessWidget {
  const VelmartPickerApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'Велмарт Комплектовщик',
      theme: AppTheme.theme,
      routerConfig: _router,
      debugShowCheckedModeBanner: false,
    );
  }
}