class ShoppingItem {
  final String name;
  final String category;
  final double amount;
  final String unit;
  final bool checked;
  final double inStock;

  const ShoppingItem({
    required this.name,
    required this.category,
    required this.amount,
    required this.unit,
    required this.checked,
    required this.inStock,
  });

  factory ShoppingItem.fromJson(Map<String, dynamic> json) {
    return ShoppingItem(
      name: json['name'] as String? ?? '',
      category: json['category'] as String? ?? 'other',
      amount: (json['amount'] as num?)?.toDouble() ?? 0,
      unit: json['unit'] as String? ?? '',
      checked: json['checked'] as bool? ?? false,
      inStock: (json['in_stock'] as num?)?.toDouble() ?? 0,
    );
  }

  Map<String, dynamic> toJson() => {
        'name': name,
        'category': category,
        'amount': amount,
        'unit': unit,
        'checked': checked,
        'in_stock': inStock,
      };

  ShoppingItem copyWith({bool? checked}) => ShoppingItem(
        name: name,
        category: category,
        amount: amount,
        unit: unit,
        checked: checked ?? this.checked,
        inStock: inStock,
      );
}