import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:worldhopper/providers/download_provider.dart';
import 'package:worldhopper/services/connectivity_service.dart';
import 'package:worldhopper/services/epub_download_service.dart';
import 'package:worldhopper/services/offline_content_checker.dart';

part 'connectivity_provider.g.dart';

/// Provider for ConnectivityService singleton
@riverpod
ConnectivityService connectivityService(ConnectivityServiceRef ref) {
  return ConnectivityService();
}

/// Stream provider for connectivity status
///
/// Emits true when online, false when offline.
/// Automatically updates all watching widgets when connectivity changes.
@riverpod
Stream<bool> connectivityStatus(ConnectivityStatusRef ref) {
  final service = ref.watch(connectivityServiceProvider);
  return service.connectivityStream;
}

/// Provider for current connectivity state
///
/// This provider caches the current connectivity status and updates
/// automatically when the status changes.
@riverpod
class ConnectivityState extends _$ConnectivityState {
  @override
  Future<bool> build() async {
    final service = ref.watch(connectivityServiceProvider);

    // Subscribe to connectivity changes
    ref.listen(connectivityStatusProvider, (_, next) {
      next.whenData((isOnline) => state = AsyncValue.data(isOnline));
    });

    // Return initial connectivity status
    return await service.isConnected();
  }
}

/// Provider for EpubDownloadService singleton
@riverpod
EpubDownloadService epubDownloadService(EpubDownloadServiceRef ref) {
  return EpubDownloadService();
}

/// Provider for OfflineContentChecker singleton
@riverpod
OfflineContentChecker offlineContentChecker(OfflineContentCheckerRef ref) {
  final epubService = ref.watch(epubDownloadServiceProvider);
  final chaptersRepo = ref.watch(downloadedChaptersRepositoryProvider);
  return OfflineContentChecker(
    epubService: epubService,
    chaptersRepo: chaptersRepo,
  );
}