import 'package:dartz/dartz.dart';
import '../../../../core/errors/failures.dart';
import '../entities/cart_item.dart';

/// Cart repository interface
abstract class CartRepository {
  /// Get all cart items
  Future<Either<Failure, List<CartItem>>> getCartItems();
  
  /// Add item to cart
  Future<Either<Failure, void>> addToCart(CartItem item);
  
  /// Update cart item quantity
  Future<Either<Failure, void>> updateQuantity(String productId, int quantity);
  
  /// Remove item from cart
  Future<Either<Failure, void>> removeFromCart(String productId);
  
  /// Clear all cart items
  Future<Either<Failure, void>> clearCart();
}