import 'package:shared_preferences/shared_preferences.dart';

class SettingsService {
  static const _keyServerUrl = 'server_url';
  static const _keyToken = 'token';
  static const _keyAutoUpload = 'auto_upload';

  static const _keyUploaded = 'uploaded_keys';

  final SharedPreferences _prefs;

  SettingsService(this._prefs);

  String? get serverUrl => _prefs.getString(_keyServerUrl);
  Future<bool> setServerUrl(String v) => _prefs.setString(_keyServerUrl, v);

  String? get token => _prefs.getString(_keyToken);
  Future<bool> setToken(String v) => _prefs.setString(_keyToken, v);

  bool get autoUpload => _prefs.getBool(_keyAutoUpload) ?? false;
  Future<bool> setAutoUpload(bool v) => _prefs.setBool(_keyAutoUpload, v);

  bool get isConfigured => serverUrl != null && token != null;

  Set<String> getUploadedKeys() => _prefs.getStringList(_keyUploaded)?.toSet() ?? <String>{};

  Future<bool> addUploadedKey(String key) {
    final keys = _prefs.getStringList(_keyUploaded) ?? [];
    keys.add(key);
    return _prefs.setStringList(_keyUploaded, keys);
  }

  Future<bool> addUploadedKeys(List<String> newKeys) {
    final keys = _prefs.getStringList(_keyUploaded) ?? [];
    keys.addAll(newKeys);
    return _prefs.setStringList(_keyUploaded, keys);
  }

  static Future<SettingsService> init() async {
    final prefs = await SharedPreferences.getInstance();
    return SettingsService(prefs);
  }
}