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

import 'core/app_theme.dart';
import 'modelos/delivery_order.dart';
import 'pantallas/login_screen.dart';
import 'pantallas/order_detail_screen.dart';
import 'pantallas/orders_screen.dart';
import 'servicios/delivery_repository.dart';
import 'servicios/push_notification_service.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await PushNotificationService.initialize();
  runApp(const SmartPlusDeliveryApp());
}

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

  @override
  Widget build(BuildContext context) {
    final repository = DeliveryRepository();
    return MaterialApp(
      title: 'SmartPlus Reparto',
      debugShowCheckedModeBanner: false,
      theme: AppTheme.light,
      home: _SessionGate(repository: repository),
      onGenerateRoute: (settings) {
        if (settings.name == '/orders') {
          return MaterialPageRoute(
            builder: (_) => OrdersScreen(repository: repository),
          );
        }
        final order = settings.arguments;
        if (settings.name == '/order-detail' && order is DeliveryOrder) {
          return MaterialPageRoute(
            builder: (_) =>
                OrderDetailScreen(order: order, repository: repository),
          );
        }
        return null;
      },
    );
  }
}

class _SessionGate extends StatelessWidget {
  const _SessionGate({required this.repository});
  final DeliveryRepository repository;

  @override
  Widget build(BuildContext context) => FutureBuilder<SharedPreferences>(
    future: SharedPreferences.getInstance(),
    builder: (context, snapshot) {
      if (snapshot.connectionState != ConnectionState.done) {
        return const Scaffold(body: Center(child: CircularProgressIndicator()));
      }
      final token = snapshot.data?.getString('delivery_api_token');
      return token == null || token.isEmpty
          ? LoginScreen(repository: repository)
          : OrdersScreen(repository: repository);
    },
  );
}