class NotificationModel {
  final String title;
  final String message;
  final bool isRead;
  final String timestamp;

  NotificationModel({
    required this.title,
    required this.message,
    required this.isRead,
    required this.timestamp,
  });

  factory NotificationModel.fromMap(Map<dynamic, dynamic> json) {
    return NotificationModel(
      title: json['title'] ?? 'Notifikasi Sistem',
      message: json['message'] ?? '',
      isRead: json['is_read'] ?? json['read'] ?? false,
      timestamp: _parseTimestamp(json['timestamp']),
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'title': title,
      'message': message,
      'is_read': isRead,
      'timestamp': timestamp,
    };
  }
}

String _parseTimestamp(dynamic value) {
  if (value == null) return '';
  if (value is int) {
    final dt = DateTime.fromMillisecondsSinceEpoch(value * 1000);
    return "${dt.year}-${dt.month.toString().padLeft(2, '0')}-${dt.day.toString().padLeft(2, '0')} "
           "${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}:${dt.second.toString().padLeft(2, '0')}";
  }
  return value.toString();
}