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

import 'screens/home_screen.dart';
import 'services/last_location.dart';
import 'services/tracker_storage.dart';
import 'widgets/theme.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final SharedPreferences prefs = await SharedPreferences.getInstance();
  // Load the last location synchronously before the root navigator can fire
  // its initial didPush and clear the saved value.
  final LastLocation? pending = LastLocationService(prefs).load();
  runApp(
    ProviderScope(
      overrides: <Override>[
        sharedPreferencesProvider.overrideWithValue(prefs),
        pendingRestoreProvider.overrideWithValue(pending),
      ],
      child: const BibleTrackerApp(),
    ),
  );
}

class BibleTrackerApp extends ConsumerStatefulWidget {
  const BibleTrackerApp({super.key});

  @override
  ConsumerState<BibleTrackerApp> createState() => _BibleTrackerAppState();
}

class _BibleTrackerAppState extends ConsumerState<BibleTrackerApp> {
  late final LastLocationObserver _observer = LastLocationObserver((
    LastLocation? location,
  ) async {
    await ref.read(lastLocationServiceProvider).save(location);
  });

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'My Bible Tracker',
      debugShowCheckedModeBanner: false,
      theme: AppTheme.light(),
      darkTheme: AppTheme.dark(),
      themeMode: ThemeMode.system,
      home: const HomeScreen(),
      navigatorObservers: <NavigatorObserver>[_observer],
    );
  }
}