enum ProductCode { newUserPack, basicPack, popularPack, premiumPack }

enum PackageType { starter, regular }

class PackageInfo {
  const PackageInfo({
    required this.productCode,
    required this.appStoreProductId,
    required this.type,
    required this.price,
    required this.credits,
    required this.isStarter,
    required this.starterEligible,
    required this.sortOrder,
  });

  final ProductCode productCode;
  final String appStoreProductId;
  final PackageType type;
  final double price;
  final int credits;
  final bool isStarter;
  final bool starterEligible;
  final int sortOrder;

  factory PackageInfo.fromJson(Map<String, dynamic> json) {
    return PackageInfo(
      productCode: _parseProductCode(json['productCode'] as String),
      appStoreProductId: json['appStoreProductId'] as String,
      type: json['type'] == 'starter'
          ? PackageType.starter
          : PackageType.regular,
      price: (json['price'] as num).toDouble(),
      credits: json['credits'] as int,
      isStarter: json['isStarter'] as bool,
      starterEligible: json['starterEligible'] as bool,
      sortOrder: json['sortOrder'] as int,
    );
  }

  static ProductCode _parseProductCode(String code) {
    return switch (code) {
      'new_user_pack' => ProductCode.newUserPack,
      'basic_pack' => ProductCode.basicPack,
      'popular_pack' => ProductCode.popularPack,
      'premium_pack' => ProductCode.premiumPack,
      _ => throw ArgumentError('Unknown product code: $code'),
    };
  }

  String get priceDisplay => '\$${price.toStringAsFixed(2)}';
}

class PackagesResult {
  const PackagesResult({
    required this.region,
    required this.currency,
    required this.packages,
  });

  final String region;
  final String currency;
  final List<PackageInfo> packages;

  factory PackagesResult.fromJson(Map<String, dynamic> json) {
    return PackagesResult(
      region: json['region'] as String,
      currency: json['currency'] as String,
      packages: (json['packages'] as List<dynamic>)
          .map((e) => PackageInfo.fromJson(e as Map<String, dynamic>))
          .toList(),
    );
  }
}