import 'package:json_annotation/json_annotation.dart';

part 'product.g.dart';

/// Catalog product (shared nutrition database entry).
@JsonSerializable()
class CatalogProduct {
  final String id;
  @JsonKey(name: 'canonical_name')
  final String canonicalName;
  @JsonKey(name: 'category_name')
  final String? categoryName;
  final String? category;
  @JsonKey(name: 'default_unit')
  final String? defaultUnit;
  @JsonKey(name: 'storage_days')
  final int? storageDays;
  final String? barcode;
  @JsonKey(name: 'calories_per_100g')
  final double? caloriesPer100g;
  @JsonKey(name: 'protein_per_100g')
  final double? proteinPer100g;
  @JsonKey(name: 'fat_per_100g')
  final double? fatPer100g;
  @JsonKey(name: 'carbs_per_100g')
  final double? carbsPer100g;

  const CatalogProduct({
    required this.id,
    required this.canonicalName,
    this.categoryName,
    this.category,
    this.defaultUnit,
    this.storageDays,
    this.barcode,
    this.caloriesPer100g,
    this.proteinPer100g,
    this.fatPer100g,
    this.carbsPer100g,
  });

  /// Display name is the server-resolved canonical name (language-aware from backend).
  String get displayName => canonicalName;

  factory CatalogProduct.fromJson(Map<String, dynamic> json) =>
      _$CatalogProductFromJson(json);

  Map<String, dynamic> toJson() => _$CatalogProductToJson(this);
}