import java.util.Scanner;

/**
 * This is the human pig player. It makes all of its decisions based on input
 * from the keyboard.
 * @author      Adam Smith
 * @version     1.0
 */

public class HumanPigPlayer extends PigPlayer {

	// the shared Scanner among all human pig players (in case there are many)
	static Scanner inputScanner = null;

	/**
	 * The main constructor for <code>HumanPigPlayer</code>.
	 * @param name The <code>HumanPigPlayer</code>'s name
	 */
	public HumanPigPlayer(String name) {
		super(name);

		// if this is the first HumanPigPlayer, allocate the Scanner
		if (inputScanner == null) inputScanner = new Scanner(System.in);
	}

	/**
	 * Alert the human player that his/her turn is beginning.
	 * @param myScore the player's current score
	 * @param opponentsScore the opponent's current score
	 */
	public void beginTurn(int myScore, int opponentsScore) {
		System.out.println(getName() +", it is now your turn!");
		System.out.println("\tYour score is "+myScore+", and your opponent's is " +opponentsScore+".");
	}

	/**
	 * Should the player roll again? This method just asks the human at the
	 * keyboard.
	 * @param turnNumber which turn the player is on (unused)
	 * @param rollNumber which roll the player is on (unused)
	 * @param poolSize the number of points currently in the pool
	 * @param myScore the number of points the player has already won (unused)
	 * @param opponentsScore the number of points the opponent has already won
	 * (unused)
	 * @return true to roll again, false to stop
	 */
	public boolean decideIfShouldRoll(int turnNumber, int rollNumber, int poolSize, int myScore, int opponentsScore) {
		System.out.println("The pool is now " +poolSize+".");
		return getYesNoQuestion("Do you wish to roll?");
	}

	// private helper function that keeps asking a question until it gets a yes or a no
	private static boolean getYesNoQuestion(String question) {
		while (true) {
			System.out.print(question +" ");
			String answer = inputScanner.nextLine();
			if (answer.equalsIgnoreCase("y") || answer.equalsIgnoreCase("yes")) return true;
			if (answer.equalsIgnoreCase("n") || answer.equalsIgnoreCase("no")) return false;
		}
	}

}