/*
 * timemeasurement.cpp
 *
 *  Created on: Nov 25, 2011
 *      Author: muecklgr_local
 */

#include <iostream>

#include "GLTB/timemeasurement.h"

namespace gltb {
	void TimeMeasurement::setMaxNumMeasurements(int maxNumMeasurements)
	{
		this->maxNumMeasurements=maxNumMeasurements;

		if(maxNumMeasurements>0 && measurements.size()>maxNumMeasurements) {
			while(measurements.size()>maxNumMeasurements) {
				measurements.erase(measurements.begin());
			}
		}
	}

	void TimeMeasurement::reset()
	{
		measurements.clear();
		startOffset=0;
	}

	void TimeMeasurement::start(bool continueMeasurement)
	{
		if(continueMeasurement && !measurements.empty()) {
			startOffset=measurements[measurements.size()-1];
			measurements.pop_back();
		} else {
			startOffset=0;
		}

		timer.start();
	}

	void TimeMeasurement::stop()
	{
		long long time=timer.stop();

		addMeasurement(startOffset+time);
		startOffset=0;
	}

	void TimeMeasurement::addMeasurement(long long time)
	{
		measurements.push_back(time);

		if(maxNumMeasurements>0 && measurements.size()>maxNumMeasurements) {
			while(measurements.size()>maxNumMeasurements) {
				measurements.erase(measurements.begin());
			}
		}
	}

	double TimeMeasurement::getAverageTime(int numMeasurements)
	{
		double averageTime=0;

		if(numMeasurements==-1) {
			numMeasurements=measurements.size();
		}

		std::cout << "numMeasurements=" << numMeasurements << std::endl;

		for(unsigned int i=measurements.size()-numMeasurements;i<measurements.size();i++) {
			std::cout << i << std::endl;
			averageTime+=measurements[i];
		}
		std::cout << "averageTime=" << averageTime << std::endl;
		averageTime/=numMeasurements;

		return averageTime;
	}
}