//Represents a gift card
public class GiftCard {

	private String storeName;
	private double value;

	/**
	 * A constructor that takes the store name and the value as parameters.
	 *
	 * @param storeName name of the store
	 * @param value how much the gift card has
	 */
	public GiftCard(String storeName, double value){
	}

	/**
	 * A constructor that takes the store name as a parameter and sets the value to 0.
	 *
	 * @param storeName
	 */
	public GiftCard(String storeName){
		this(storeName, 0.0);
	}

	/**
	 * Returns the current value of the CiftCard
	 *
	 * @return
	 */
	public double getValue(){
		return value;
	}

	/**
	 * Returns the name of the store that issued this GiftCard
	 *
	 * @return
	 */
	public String getStore(){
		return storeName;
	}

	/**
	 * Adds amount to the Value of this GiftCard if the amountToAdd is greater than 0.
	 * Otherwise it does nothing.
	 *
	 * @param amountToAdd the amount to add
	 */
	public void addValue(double amountToAdd){
		if (amountToAdd > 0.0){
			value = value + amountToAdd;
		}
		else{
			return;
		}
	}

	/**
	 * Reduces the value by the amount of the purchase.
	 * If amountOfPurchase is negative or greater than the value in the card, do nothing.
	 *
	 * @param amountOfPurchase the amount of purchase
	 */
	public void purchase(double amountOfPurchase){
		if (amountOfPurchase < value || amountOfPurchase > 0){
			value = value - amountOfPurchase;
		}
		else{
			return;
		}
	}
}