import java.util.Random;

/**
 * A Weapon represents one of the three choices in the Rock-Paper-Scissors game. 
 * @author Marty Stepp
 * @version CSE 331 Spring 2011, 5/2/2011
 */
public enum Weapon {
	ROCK, SCISSORS, PAPER;
	
	/**
	 * Returns a randomly chosen weapon from the three choices.
	 * @return ROCK, PAPER, or SCISSORS, chosen at random
	 */
	public static Weapon random() {
		Random rand = new Random();
		int weapon = rand.nextInt(3);
		return Weapon.values()[weapon];
	}
	
	/**
	 * Returns whether this weapon beats the given other weapon if they
	 * match up against each other in a game.
	 * @param other the other weapon to compare against
	 * @return true if this weapon defeats the other; false if other wins or there is a tie
	 */
	public boolean defeats(Weapon other) {
		return (this == ROCK && other == SCISSORS)
			|| (this == SCISSORS && other == PAPER)
			|| (this == PAPER && other == ROCK);
	}
}