/*******************************************************************************
 * Copyright (C) 2013  Stefan Schroeder
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 3.0 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package jsprit.analysis.toolbox;

import java.util.Collection;

import jsprit.core.algorithm.VehicleRoutingAlgorithm;
import jsprit.core.algorithm.listener.AlgorithmEndsListener;
import jsprit.core.algorithm.listener.AlgorithmStartsListener;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;

import org.apache.log4j.Logger;


public class StopWatch implements AlgorithmStartsListener, AlgorithmEndsListener{
	
	private static Logger log = Logger.getLogger(StopWatch.class);
	
	private double ran;
	
	private double startTime;
	
	
	@Override
	public void informAlgorithmStarts(VehicleRoutingProblem problem, VehicleRoutingAlgorithm algorithm, Collection<VehicleRoutingProblemSolution> solutions) {
		reset();
		start();
	}
	
	public double getCompTimeInSeconds(){
		return (ran)/1000.0;
	}

	@Override
	public void informAlgorithmEnds(VehicleRoutingProblem problem, Collection<VehicleRoutingProblemSolution> solutions) {
		stop();
		log.info("computation time [in sec]: " + getCompTimeInSeconds());
	}
	
	public void stop(){
		ran += System.currentTimeMillis() - startTime;
	}
	
	public void start(){
		startTime = System.currentTimeMillis();
	}
	
	public void reset(){
		startTime = 0;
		ran = 0;
	}
	
	@Override
	public String toString() {
		return "stopWatch: " + getCompTimeInSeconds() + " sec";
	}

	public double getCurrTimeInSeconds() {
		return (System.currentTimeMillis()-startTime)/1000.0;
	}
	
}