class TimelineState {
  final TimelineData timeline;
  final String? selectedItemId;

  TimelineState({required this.timeline, this.selectedItemId});

  factory TimelineState.fromJson(Map<String, dynamic> json) {
    return TimelineState(
      timeline: TimelineData.fromJson(json['timeline'] as Map<String, dynamic>),
      selectedItemId: json['selectedItemId'] as String?,
    );
  }
}

class TimelineData {
  final String id;
  final String title;
  final List<TimelineGroupData> groups;

  TimelineData({required this.id, required this.title, required this.groups});

  factory TimelineData.fromJson(Map<String, dynamic> json) {
    return TimelineData(
      id: json['id'] as String,
      title: json['title'] as String,
      groups: (json['groups'] as List<dynamic>)
          .map((g) => TimelineGroupData.fromJson(g as Map<String, dynamic>))
          .toList(),
    );
  }
}

class TimelineGroupData {
  final String id;
  final String title;
  final int sortOrder;
  final List<TimelineItemData> items;

  TimelineGroupData({
    required this.id,
    required this.title,
    required this.sortOrder,
    required this.items,
  });

  factory TimelineGroupData.fromJson(Map<String, dynamic> json) {
    return TimelineGroupData(
      id: json['id'] as String,
      title: json['title'] as String,
      sortOrder: json['sortOrder'] as int,
      items: (json['items'] as List<dynamic>)
          .map((i) => TimelineItemData.fromJson(i as Map<String, dynamic>))
          .toList(),
    );
  }
}

class TimelineItemData {
  final String id;
  final String title;
  final String? description;
  final String start;
  final String? end;

  TimelineItemData({
    required this.id,
    required this.title,
    this.description,
    required this.start,
    this.end,
  });

  factory TimelineItemData.fromJson(Map<String, dynamic> json) {
    return TimelineItemData(
      id: json['id'] as String,
      title: json['title'] as String,
      description: json['description'] as String?,
      start: json['start'] as String,
      end: json['end'] as String?,
    );
  }
}