class HistoryEntry {
  final String id;
  final DateTime timestamp;
  final String word;
  final int sessionNumber;
  final String partOfSpeech;
  final String symbolicMeaning;
  final String readingType;
  final String? positionTitle;
  final String? question;
  final String? aiInterpretation;

  const HistoryEntry({
    required this.id,
    required this.timestamp,
    required this.word,
    required this.sessionNumber,
    required this.partOfSpeech,
    required this.symbolicMeaning,
    this.readingType = 'Жребий',
    this.positionTitle,
    this.question,
    this.aiInterpretation,
  });

  HistoryEntry copyWith({
    String? id,
    DateTime? timestamp,
    String? word,
    int? sessionNumber,
    String? partOfSpeech,
    String? symbolicMeaning,
    String? readingType,
    String? positionTitle,
    String? question,
    String? aiInterpretation,
  }) {
    return HistoryEntry(
      id: id ?? this.id,
      timestamp: timestamp ?? this.timestamp,
      word: word ?? this.word,
      sessionNumber: sessionNumber ?? this.sessionNumber,
      partOfSpeech: partOfSpeech ?? this.partOfSpeech,
      symbolicMeaning: symbolicMeaning ?? this.symbolicMeaning,
      readingType: readingType ?? this.readingType,
      positionTitle: positionTitle ?? this.positionTitle,
      question: question ?? this.question,
      aiInterpretation: aiInterpretation ?? this.aiInterpretation,
    );
  }

  String get formattedSessionNumber => sessionNumber.toString().padLeft(3, '0');

  String get formattedDate {
    final day = timestamp.day.toString().padLeft(2, '0');
    final month = timestamp.month.toString().padLeft(2, '0');
    final year = timestamp.year.toString();
    final hour = timestamp.hour.toString().padLeft(2, '0');
    final minute = timestamp.minute.toString().padLeft(2, '0');
    final second = timestamp.second.toString().padLeft(2, '0');
    return '$day.$month.$year $hour:$minute:$second';
  }

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'timestamp': timestamp.toIso8601String(),
      'word': word,
      'sessionNumber': sessionNumber,
      'partOfSpeech': partOfSpeech,
      'symbolicMeaning': symbolicMeaning,
      'readingType': readingType,
      'positionTitle': positionTitle,
      'question': question,
      'aiInterpretation': aiInterpretation,
    };
  }

  factory HistoryEntry.fromMap(Map<String, dynamic> map) {
    return HistoryEntry(
      id: map['id'] as String? ?? DateTime.now().millisecondsSinceEpoch.toString(),
      timestamp: DateTime.tryParse(map['timestamp'] as String? ?? '') ?? DateTime.now(),
      word: map['word'] as String? ?? '',
      sessionNumber: map['sessionNumber'] as int? ?? 0,
      partOfSpeech: map['partOfSpeech'] as String? ?? '',
      symbolicMeaning: map['symbolicMeaning'] as String? ?? '',
      readingType: map['readingType'] as String? ?? 'Жребий',
      positionTitle: map['positionTitle'] as String?,
      question: map['question'] as String?,
      aiInterpretation: map['aiInterpretation'] as String?,
    );
  }
}