package ninja.bytecode.iris.util;

public class PrecisionStopwatch {
	private long nanos;
	private long startNano;
	private long millis;
	private long startMillis;
	private double time;
	private boolean profiling;

	public static PrecisionStopwatch start() {
		PrecisionStopwatch p = new PrecisionStopwatch();
		p.begin();

		return p;
	}

	public PrecisionStopwatch() {
		reset();
		profiling = false;
	}

	public void begin() {
		profiling = true;
		startNano = System.nanoTime();
		startMillis = System.currentTimeMillis();
	}

	public void end() {
		if (!profiling) {
			return;
		}

		profiling = false;
		nanos = System.nanoTime() - startNano;
		millis = System.currentTimeMillis() - startMillis;
		time = (double) nanos / 1000000.0;
		time = (double) millis - time > 1.01 ? millis : time;
	}

	public void reset() {
		nanos = -1;
		millis = -1;
		startNano = -1;
		startMillis = -1;
		time = -0;
		profiling = false;
	}

	public double getTicks() {
		return getMilliseconds() / 50.0;
	}

	public double getSeconds() {
		return getMilliseconds() / 1000.0;
	}

	public double getMinutes() {
		return getSeconds() / 60.0;
	}

	public double getHours() {
		return getMinutes() / 60.0;
	}

	public double getMilliseconds() {
		nanos = System.nanoTime() - startNano;
		millis = System.currentTimeMillis() - startMillis;
		time = (double) nanos / 1000000.0;
		time = (double) millis - time > 1.01 ? millis : time;
		return time;
	}

	public long getNanoseconds() {
		return (long) (time * 1000000.0);
	}

	public long getNanos() {
		return nanos;
	}

	public long getStartNano() {
		return startNano;
	}

	public long getMillis() {
		return millis;
	}

	public long getStartMillis() {
		return startMillis;
	}

	public double getTime() {
		return time;
	}

	public boolean isProfiling() {
		return profiling;
	}
}