import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'ui/features/speedometer/speedometer_view.dart';
import 'ui/features/speedometer/speedometer_view_model.dart';
import 'providers/settings_provider.dart';
import 'data/repositories/location_repository.dart';

/// Stub ViewModel for the overlay feature.
///
/// [Overlay] has been deferred — see ui/features/overlay/ for details.
class OverlayViewModel extends ChangeNotifier {
  bool get isOverlayActive => false;
  void toggleOverlay() {}
  void closeOverlay() {}
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final prefs = await SharedPreferences.getInstance();

  runApp(
    MultiProvider(
      providers: [
        // Shared
        Provider<SharedPreferences>.value(value: prefs),
        // Data layer
        ChangeNotifierProvider<LocationRepository>(
          create: (_) {
            final repo = LocationRepository();
            repo.initialize();
            return repo;
          },
        ),
        // UI layer — ViewModels subscribe to repositories
        ChangeNotifierProvider<SettingsProvider>(
          create: (context) => SettingsProvider(
            context.read<SharedPreferences>(),
          ),
        ),
        ChangeNotifierProvider<SpeedometerViewModel>(
          create: (context) => SpeedometerViewModel(
            context.read<LocationRepository>(),
            context.read<SettingsProvider>(),
          ),
        ),
        ChangeNotifierProvider<OverlayViewModel>(
          create: (_) => OverlayViewModel(),
        ),
      ],
      child: const SpeedoApp(),
    ),
  );
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Speedo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        useMaterial3: true,
        brightness: Brightness.dark,
        colorSchemeSeed: Colors.green,
      ),
      home: const SpeedometerView(),
    );
  }
}