package bjc.dicelang.dice;

/**
 * A die whose rolls result from concatenating two other rolls together.
 *
 * @author Ben Culkin
 */
public class CompoundDie implements Die {
	/* The dice that form this die */
	private final Die left;
	private final Die right;

	/**
	 * Create a new compound die.
	 *
	 * @param lft
	 *                The left die
	 * @param rght
	 *                The right die
	 */
	public CompoundDie(final Die lft, final Die rght) {
		left = lft;
		right = rght;
	}

	@Override
	public boolean canOptimize() {
		return left.canOptimize() && right.canOptimize();
	}

	@Override
	public long optimize() {
		long leftOpt  = left.optimize();
		long rightOpt = right.optimize();

		return Long.parseLong(String.format("%d%d", leftOpt, rightOpt));
	}

	@Override
	public long roll() {
		long leftRoll  = left.optimize();
		long rightRoll = right.optimize();

		return Long.parseLong(String.format("%d%d", leftRoll, rightRoll));
	}

	@Override
	public long rollSingle() {
		/* Actually one dice built using two, can't be split. */
		return roll();
	}

	@Override
	public String toString() {
		String leftString  = left.toString();
		String rightString = right.toString();

		return String.format("%sc%s", leftString, rightString);
	}
}