import 'package:equatable/equatable.dart';

/// Base failure class
abstract class Failure extends Equatable {
  final String message;
  
  const Failure(this.message);

  @override
  List<Object> get props => [message];
}

/// Server failure
class ServerFailure extends Failure {
  const ServerFailure([super.message = 'Server failure occurred']);
}

/// Cache failure
class CacheFailure extends Failure {
  const CacheFailure([super.message = 'Cache failure occurred']);
}

/// Network failure
class NetworkFailure extends Failure {
  const NetworkFailure([super.message = 'Network failure occurred']);
}

/// Validation failure
class ValidationFailure extends Failure {
  const ValidationFailure([super.message = 'Validation failure occurred']);
}

/// Not found failure
class NotFoundFailure extends Failure {
  const NotFoundFailure([super.message = 'Resource not found']);
}

/// Unauthorized failure
class UnauthorizedFailure extends Failure {
  const UnauthorizedFailure([super.message = 'Unauthorized access']);
}

/// Authentication failure
class AuthenticationFailure extends Failure {
  const AuthenticationFailure([super.message = 'Authentication failed']);
}

/// Invalid credentials failure
class InvalidCredentialsFailure extends Failure {
  const InvalidCredentialsFailure([super.message = 'Invalid email or password']);
}

/// Token expired failure
class TokenExpiredFailure extends Failure {
  const TokenExpiredFailure([super.message = 'Token has expired']);
}

/// Conflict failure (e.g., email already exists)
class ConflictFailure extends Failure {
  const ConflictFailure([super.message = 'Resource already exists']);
}