import 'package:cloud_firestore/cloud_firestore.dart';

class MindMapModel {
  final String id;
  final String title;
  final String description;
  final String ownerEmail;
  final bool isMain; // Основные карты (админские) vs Личные
  final List<Map<String, dynamic>> nodes;
  final Map<String, dynamic> settings;
  final DateTime createdAt;
  final DateTime updatedAt;

  MindMapModel({
    required this.id,
    required this.title,
    this.description = '',
    required this.ownerEmail,
    this.isMain = false,
    this.nodes = const [],
    this.settings = const {},
    required this.createdAt,
    required this.updatedAt,
  });

  factory MindMapModel.fromFirestore(DocumentSnapshot doc) {
    final data = doc.data() as Map<String, dynamic>;
    return MindMapModel.fromMap(doc.id, data);
  }

  factory MindMapModel.fromMap(String id, Map<String, dynamic> data) {
    return MindMapModel(
      id: id,
      title: data['title'] ?? '',
      description: data['description'] ?? '',
      ownerEmail: data['ownerEmail'] ?? '',
      isMain: data['isMain'] ?? false,
      nodes: List<Map<String, dynamic>>.from(data['nodes'] ?? []),
      settings: data['settings'] ?? {},
      createdAt: (data['createdAt'] as Timestamp).toDate(),
      updatedAt: (data['updatedAt'] as Timestamp).toDate(),
    );
  }

  Map<String, dynamic> toFirestore() {
    return {
      'title': title,
      'description': description,
      'ownerEmail': ownerEmail,
      'isMain': isMain,
      'nodes': nodes,
      'settings': settings,
      'createdAt': Timestamp.fromDate(createdAt),
      'updatedAt': Timestamp.fromDate(updatedAt),
    };
  }

  MindMapModel copyWith({
    String? id,
    String? title,
    String? description,
    String? ownerEmail,
    bool? isMain,
    List<Map<String, dynamic>>? nodes,
    Map<String, dynamic>? settings,
    DateTime? createdAt,
    DateTime? updatedAt,
  }) {
    return MindMapModel(
      id: id ?? this.id,
      title: title ?? this.title,
      description: description ?? this.description,
      ownerEmail: ownerEmail ?? this.ownerEmail,
      isMain: isMain ?? this.isMain,
      nodes: nodes ?? this.nodes,
      settings: settings ?? this.settings,
      createdAt: createdAt ?? this.createdAt,
      updatedAt: updatedAt ?? this.updatedAt,
    );
  }

  int get nodeCount => nodes.length;
  int get maxLevel {
    if (nodes.isEmpty) return 0;
    return nodes.fold(
        0, (max, node) => max > (node['level'] ?? 0) ? max : (node['level'] ?? 0));
  }
}