import 'package:encrypt/encrypt.dart' as encrypt;
import 'package:flutter_dotenv/flutter_dotenv.dart';

// class UrlEncryption {
//   /// The singleton instance
//   static final UrlEncryption _instance = UrlEncryption._internal();
//
//   /// Private constructor
//   // UrlEncryption._internal() {
//   //   _init();
//   // }
//
//   /// Factory constructor to return the same instance
//   factory UrlEncryption() {
//     return _instance;
//   }
//
//   /// Encryption key
//   encrypt.Key? _key;
//
//   /// Method to initialize the encryption key from environment variable
//   // void _init() {
//   //   final keyString = dotenv.env['ENCRYPTION_KEY'];
//   //   if (keyString == null || keyString.length != 32) {
//   //     throw Exception('Invalid encryption key in environment variables.');
//   //   }
//   //   _key = encrypt.Key.fromUtf8(keyString);
//   // }
//
//   /// Method to encrypt data
//   String encryptData(String data) {
//     if (_key == null) {
//       throw Exception('Encryption key is not initialized.');
//     }
//     final iv = encrypt.IV.fromLength(16); // Generate a random IV
//     final encrypter = encrypt.Encrypter(encrypt.AES(_key!, mode: encrypt.AESMode.cbc));
//
//     final encrypted = encrypter.encrypt(data, iv: iv);
//     final ivBase64 = iv.base64;
//     final encryptedBase64 = encrypted.base64;
//
//     return '$ivBase64:$encryptedBase64'; // Store IV and ciphertext together
//   }
//
//   /// Method to decrypt data
//   String decryptData(String encryptedData) {
//     if (_key == null) {
//       throw Exception('Encryption key is not initialized.');
//     }
//     final parts = encryptedData.split(':');
//     final iv = encrypt.IV.fromBase64(parts[0]); // Extract the IV
//     final encrypted = encrypt.Encrypted.fromBase64(parts[1]);
//
//     final encrypter = encrypt.Encrypter(encrypt.AES(_key!, mode: encrypt.AESMode.cbc));
//     final decrypted = encrypter.decrypt(encrypted, iv: iv);
//
//     return decrypted;
//   }
// }