public class MayanDate {
	private int baktun;
	private int katun;
	private int tun;
	private int uinal;
	private int kin;

	public MayanDate(int baktun, int katun, int tun, int uinal, int kin) {
		if (!validMayanDate(baktun, katun, tun, uinal, kin)) {
			throw new IllegalArgumentException("Not a valid Mayan date.");
		}
		this.baktun = baktun;
		this.katun = katun;
		this.tun = tun;
		this.uinal = uinal;
		this.kin = kin;

	}

	public void incrementOneKin() {
		kin += 1;

		if (kin == 20) {
			kin = 0;
			uinal += 1;
		}
		if (uinal == 18) {
			uinal = 0;
			tun += 1;
		}
		if (tun == 20) {
			tun = 0;
			katun += 1;
		}
		if (katun == 20) {
			kin = 0;
			uinal = 0;
			tun = 0;
			katun = 0;
			baktun += 1;
		}
	}

	public void incrementNKin(int n) {
		for (int i = 1; i <= n; i++) {
			incrementOneKin();
		}
	}

	private boolean validMayanDate(int baktun2, int katun2, int tun2,
			int uinal2, int kin2) {
		// TODO Auto-generated method stub
		return true;
	}

	public int getKin() {
		return kin;
	}

	public int getUinal() {
		return uinal;
	}

	public int getTun() {
		return tun;
	}

	public int getKatun() {
		return katun;
	}

	public int getBaktun() {
		return baktun;
	}

	public String toString() {
		String dateString = baktun + "." + katun + "." + tun + "." + uinal
				+ "." + kin;
		return dateString;
	}

}