import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

abstract class TokenStorage {
  static SharedPreferences? _cachedPrefs;

  static Future<SharedPreferences> _getPrefs() async {
    _cachedPrefs ??= await SharedPreferences.getInstance();
    return _cachedPrefs!;
  }

  /// Clears the cached SharedPreferences instance.
  /// This is primarily used for testing to ensure fresh state between tests.
  @visibleForTesting
  static void clearCache() {
    _cachedPrefs = null;
  }

  static Future<bool> haveTokenInStorage() async {
    try {
      final sharedPreferences = await _getPrefs();
      if (sharedPreferences.getString('token') == null) {
        return false;
      } else {
        return true;
      }
    } catch (e) {
      return false;
    }
  }

  static Future<String?> getTokenFromStorage() async {
    final sharedPreferences = await _getPrefs();
    return sharedPreferences.getString('token');
  }

  static Future<void> saveTokenInStorage(String token) async {
    final sharedPreferences = await _getPrefs();
    await sharedPreferences.setString('token', token);
  }

  static Future<void> removeTokenInStorage() async {
    final sharedPreferences = await _getPrefs();
    await sharedPreferences.remove('token');
  }
}

abstract class SocketIdStorage {
  static Future<bool> haveSocketIdInStorage() async {
    try {
      final sharedPreferences = await TokenStorage._getPrefs();
      if (sharedPreferences.getString('socketId') == null) {
        return false;
      } else {
        return true;
      }
    } catch (e) {
      return false;
    }
  }

  static Future<String?> getSocketIdFromStorage() async {
    final sharedPreferences = await TokenStorage._getPrefs();
    return sharedPreferences.getString('socketId');
  }

  static Future<void> saveSocketIdInStorage(String socketId) async {
    final sharedPreferences = await TokenStorage._getPrefs();
    await sharedPreferences.setString('socketId', socketId);
  }

  static Future<void> removeSocketIdInStorage() async {
    final sharedPreferences = await TokenStorage._getPrefs();
    await sharedPreferences.remove('socketId');
  }
}