import 'course.dart';

/// Evaluation history record
class EvaluationHistory {
  final String id;
  final Course course;
  final DateTime timestamp;
  final bool success;
  final String? errorMessage;

  EvaluationHistory({
    required this.id,
    required this.course,
    required this.timestamp,
    required this.success,
    this.errorMessage,
  });

  factory EvaluationHistory.fromJson(Map<String, dynamic> json) {
    return EvaluationHistory(
      id: json['id'] as String? ?? '',
      course: Course.fromJson(json['course'] as Map<String, dynamic>),
      timestamp: json['timestamp'] != null
          ? DateTime.parse(json['timestamp'] as String)
          : DateTime.now(),
      success: json['success'] as bool? ?? false,
      errorMessage: json['errorMessage'] as String?,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'course': course.toJson(),
      'timestamp': timestamp.toIso8601String(),
      'success': success,
      'errorMessage': errorMessage,
    };
  }

  @override
  String toString() {
    return 'EvaluationHistory(id: $id, course: ${course.name}, success: $success, timestamp: $timestamp)';
  }

  @override
  bool operator ==(Object other) {
    if (identical(this, other)) return true;
    return other is EvaluationHistory && other.id == id;
  }

  @override
  int get hashCode => id.hashCode;
}