/**
 * Guest is a person visiting the King.
 * A guest has a name and a gift.  The gift has a value
 * in "Kopecks" (a Natural number).
 * Guests can be compared by the value of their gifts.
 */
public class Guest implements Comparable<Guest>
{
    private String name;
    private String gift;
    private Natural giftValue;

    /**
     * Construct a Guest 
     * @param name The guests name
     * @param gift The name of the gift brought by this guest
     * @param giftValue How much the gift is worth in Kopecks.
     */
    public Guest(String name, String gift, Natural giftValue)
    {
        this.name = name;
        this.gift = gift;
        this.giftValue = giftValue;
    }

    /** 
     * Compare two guests, the one with the most expensive gift
     * is higher.
     * @param other the guest to be compared to this one.
     * @return 0 if the two guests gifts are equal, -1 if this guest
     * has a cheaper gift, +1 if this guest has a more expensive gift.
     */
    public int compareTo(Guest other)
    {   
        return this.giftValue.compareTo(other.giftValue);
    }

    /**
     * Return the value of this guest's gift.
     * @return Natural the giftValue
     */
    public Natural giftValue()
    {
        return giftValue;
    }
    
    /** 
     * Return a string representation of this guest, 
     * specifically: <code>name + " " + gift + " " + giftValue;</code>
     * @return a string representation of this guest
     */
    public String toString()
    {
            return name + " " + gift + " " + giftValue;
    }            
    
}