package cart

import (
	"fmt"

	messages "git.k6n.net/go-cart-actor/proto/cart"
)

func ClearCart(g *CartGrain, m *messages.ClearCartRequest) error {
	if m == nil {
		return fmt.Errorf("ClearCart: nil payload")
	}
	if g.CheckoutStatus != nil {
		return fmt.Errorf("ClearCart: cart is in checkout")
	}
	// Clear items, vouchers, etc., but keep userId, etc.
	g.Items = g.Items[:0]
	g.Vouchers = g.Vouchers[:0]
	g.Notifications = g.Notifications[:0]
	g.OrderReference = ""
	g.Processing = false

	// g.InventoryReserved = false maybe should release inventory
	g.UpdateTotals()
	return nil
}