import '../../../core/utils/crypto_utils.dart';

class SecureLoginRequest {
  final String username;
  final String passwordHash; // 客户端哈希后的密码
  final String salt; // 盐值
  final String? clientKey; // 客户端密钥（用于加密传输）
  
  SecureLoginRequest({
    required this.username,
    required this.passwordHash,
    required this.salt,
    this.clientKey,
  });
  
  Map<String, dynamic> toJson() {
    return {
      'username': username,
      'password_hash': passwordHash,
      'salt': salt,
      'client_key': clientKey,
    };
  }
  
  // 工厂方法：创建安全的登录请求
  factory SecureLoginRequest.create({
    required String username,
    required String password,
  }) {
    // 生成盐值
    final salt = CryptoUtils.generateSalt();
    
    // 密码加盐哈希
    final passwordWithSalt = password + salt;
    final passwordHash = CryptoUtils.sha256Hash(passwordWithSalt);
    
    // 生成客户端密钥（可选，用于进一步加密）
    final clientKey = CryptoUtils.generateClientKey();
    
    return SecureLoginRequest(
      username: username,
      passwordHash: passwordHash,
      salt: salt,
      clientKey: clientKey,
    );
  }
}