import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:shared_preferences/shared_preferences.dart';

part 'precache_pages_provider.g.dart';

/// Key for storing pre-cache pages preference in SharedPreferences
const String _precachePagesKey = 'image_reader_precache_pages';

/// Provider for image reader pre-cache pages state management
@riverpod
class PrecachePagesNotifier extends _$PrecachePagesNotifier {
  @override
  int build() {
    _loadPrecachePages();
    return 3; // Default value until loaded
  }

  /// Load pre-cache pages count from SharedPreferences
  Future<void> _loadPrecachePages() async {
    final prefs = await SharedPreferences.getInstance();
    final count = prefs.getInt(_precachePagesKey);

    if (count != null) {
      state = count.clamp(0, 5);
    }
  }

  /// Set pre-cache pages count and persist to SharedPreferences
  Future<void> setPrecachePages(int count) async {
    state = count.clamp(0, 5);
    final prefs = await SharedPreferences.getInstance();
    await prefs.setInt(_precachePagesKey, count);
  }
}