class Tariff {
  final String id;
  final String name;
  final double price;
  final String currency;
  final Map<String, dynamic> features;
  final bool isActive;
  final DateTime createdAt;

  Tariff({
    required this.id,
    required this.name,
    required this.price,
    this.currency = 'RUB',
    required this.features,
    this.isActive = true,
    required this.createdAt,
  });

  factory Tariff.fromJson(Map<String, dynamic> json) => Tariff(
        id: json['id'] as String,
        name: json['name'] as String,
        price: (json['price'] as num).toDouble(),
        currency: json['currency'] as String? ?? 'RUB',
        features: json['features'] as Map<String, dynamic>? ?? {},
        isActive: json['is_active'] as bool? ?? true,
        createdAt: DateTime.parse(json['created_at'] as String),
      );

  Map<String, dynamic> toJson() => {
        'id': id,
        'name': name,
        'price': price,
        'currency': currency,
        'features': features,
        'is_active': isActive,
        'created_at': createdAt.toIso8601String(),
      };
}