package ch9.large;

public class DeliveryPrice implements PriceRule {
    @Override
    public double priceToAggregate(ShoppingCart cart) {

        int totalItems = cart.numberOfItems();

        if(totalItems == 0)
            return 0;
        if(totalItems >= 1 && totalItems <= 3)
            return 5;
        if(totalItems >= 4 && totalItems <= 10)
            return 12.5;

        // for the tool to get 100% coverage, use the code below
        //if(totalItems == 0)
        //    return 0;
        //if(totalItems <= 3)
        //    return 5;
        //if(totalItems <= 10)
        //    return 12.5;

        return 20.0;
    }
}