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package jadex.bdi.blocksworld;

import java.util.ArrayList;
import java.util.Random;
import java.util.Set;

import jadex.bdi.annotation.Plan;
import jadex.bdi.annotation.PlanAPI;
import jadex.bdi.annotation.PlanBody;
import jadex.bdi.annotation.PlanCapability;
import jadex.bdi.annotation.PlanReason;
import jadex.bdi.blocksworld.BlocksworldAgent.ConfigureGoal;
import jadex.bdi.runtime.IPlan;
import jadex.common.SUtil;
import jadex.execution.IExecutionFeature;


/**
 *  Measures Jadex performance by executing several configure goals.
 */
@Plan
public class BenchmarkPlan
{
	//-------- attributes --------

	/** The number of runs to be performed. */
	protected int	runs;

	/** The number of different goals to be executed per run. */
	protected int	goals;

	@PlanCapability
	protected BlocksworldAgent capa;
	
	@PlanAPI
	protected IPlan rplan;
	
	@PlanReason
	protected ConfigureGoal goal;

	
	/**
	 *  Create new plan.
	 *  @param runs
	 *  @param goals
	 */
	public BenchmarkPlan(int runs, int goals)
	{
		this.runs = runs;
		this.goals = goals;
	}

	//-------- methods --------

	/**
	 *  The plan body.
	 */
	@PlanBody
	public void body()
	{
		System.out.println("Performing benchmark ("+runs+" runs with "+goals+" goals each).");
		long[]	times	= new long[runs];
		long	total	= 0;

		// Perform runs (first run isn't counted).
		for(int run=0; run<=runs; run++)
		{
			long	time	= getTime();

			// Initialize random number generator.
			Random	rand	= new Random(12345678L);

			Block[]	blocks	= (Block[])capa.getBlocks().toArray(new Block[0]);

			for(int i=1; i<=goals; i++)
			{
				// Create copies of existing blocks.
				ArrayList	newblocks	= new ArrayList();
				for(int j=0; j0)
				{
					Block	source	= (Block)newblocks.remove(rand.nextInt(newblocks.size()));
					Block	target	= (Block)targets.get(rand.nextInt(targets.size()));
					source.stackOn(target);
					targets.add(source);
					if(!target.isClear())
					{
						targets.remove(target);
					}
				}

				Set bs = SUtil.arrayToSet(table.getAllBlocks());
				ConfigureGoal configure = capa.new ConfigureGoal(table, bs);
				rplan.dispatchSubgoal(configure).get();
			}

			if(run!=0)
			{
				// Print intermediate result.
				times[run-1]	= getTime()-time;
				total	+= times[run-1];
				System.out.println("Run "+run+" took "+times[run-1]+" milliseconds.");
			}
			else
				System.out.println("Random generator test: "+rand.nextInt(1234));
			
		}

		// Print total result.
		System.out.println("Benchmark completed.");
		System.out.println("Total time (millis): "+total);
		System.out.println("Avg. time per run (millis): "+(total/runs));
		System.out.println("Avg. time per goal (millis): "+(total/runs/goals));

		// Calculate deviation (= quality of measurement).
		double	deviation	= 0;
		double	avg	= total/(double)runs;
		for(int i=0; i