package mior.model;
  
  import java.util.Arrays;
  import java.util.Random;
  
  import mcmas.core.MCM;
  import mcmas.core.MCMCommandQueue;
  import mcmas.core.MCMCommandQueueProperty;
  import mcmas.core.MCMContext;
  import mcmas.core.MCMEvent;
  import mcmas.core.MCMKernel;
  import mcmas.core.MCMMem;
  import mcmas.core.MCMProgram;
  import mcmas.core.MCMUtils;
  
  import org.jocl.Pointer;
  import org.perf4j.slf4j.Slf4JStopWatch;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  public class OCLMiorModel2 extends SimpleMiorModel {
  	
  	private MCMContext 		context;
  	private MCMProgram 		program;
  	private MCMCommandQueue queue;
  	
  	private MCMKernel		topoKernel;
  	private MCMKernel       scatterKernel;
  	private MCMKernel		liveKernel;
  	private MCMKernel       reduceKernel;
  	
  	private MCMMem     		mmMem;
  	private MCMMem     		omMem;
  	private MCMMem     		associationsMem;
  	private MCMMem     		worldMem;
  	
  	private MCMMem          omIndexesMem;
  	private MCMMem          totalsMem;
  	
  	private int[]           totals;
  	private final Random    rand;
  	
  	private final static Logger logger = LoggerFactory.getLogger(OCLMiorModel2.class);
  	private final Slf4JStopWatch watch = new Slf4JStopWatch(logger);
  	
  	private final String MODEL_SOURCE = "kernels/mior_model2.cl";
  	
  	public OCLMiorModel2(MiorWorld world) {
  		super(world);
  		this.rand = new Random();
  		
  		watch.start("OpenCL setup");
  		
  		this.context = new MCMContext();
  		this.queue = context.createCommandQueue(MCMCommandQueueProperty.ENABLE_PROFILING);
  		
  		watch.stop();
  		watch.start("Program compilation");
  		
  		this.program = MCMUtils.compileFile(context, MODEL_SOURCE);
  		
  		watch.stop();
  		watch.start("Kernel allocation");
  		
  		this.topoKernel = program.createKernel("topology");
  		this.scatterKernel = program.createKernel("carbon_scatter");
  		this.liveKernel = program.createKernel("live");
  		this.reduceKernel = program.createKernel("carbon_reduce");
  		
  		watch.stop();
  		watch.start("Memory allocation");
  		
  		this.mmMem = context.newBuffer().Using(mmList).b();
  		this.omMem = context.newBuffer().Using(omList).b();
  		this.associationsMem = context.newBuffer().Using(associations).b();
  		this.worldMem = context.newBuffer().Using(world).b();
  		
  		this.omIndexesMem = context.newBuffer().Size(omList.length * mmList.length, MCM.INT).b();
  		
  		this.totals = new int[omList.length];
  		Arrays.fill(totals, 0);
  		
  		this.totalsMem = context.newBuffer().Using(totals).b();
  		
  		watch.stop();
  	}
  	
  	
  	@Override
  	protected void resetImpl() {
  		super.resetImpl();
  		Arrays.fill(totals, 0);
  		
  		queue.enqueueWriteBuffer(mmMem, mmList, 0, mmMem.getSize());
  		queue.enqueueWriteBuffer(omMem, omList, 0, omMem.getSize());
  		queue.enqueueWriteBuffer(associationsMem, Pointer.to(associations), 0, associationsMem.getSize());
  		queue.enqueueWriteBuffer(worldMem, new MiorWorld[] { world }, 0, worldMem.getSize());
  		queue.enqueueWriteBuffer(totalsMem, Pointer.to(totals), 0, totalsMem.getSize());
  		queue.finish();
  		
  		fireMiorUpdated();
  	}
  	
  	@Override
  	public void doTopologyImpl() {
  		if (topoKernel.getArgumentsNumber() == 5) {
  			topoKernel.setArguments(mmMem, omMem, associationsMem, worldMem, totalsMem);
  		} else {
  			topoKernel.setArguments(mmMem, omMem, associationsMem, worldMem);
  		}
  		
  		/*
  		OCLEvent event = queue.enqueueKernel(
  				topoKernel, 2,
  				new long[] { 0, 0 },
  				new long[] { mmList.length, omList.length },
  				new long[] { 1, 1 }
  		);*/
  		
  		MCMEvent event = queue.enqueueKernel(topoKernel, 2, new long[] { nbMM, nbOM });
  		
  		MCMEvent.waitFor(event);
  		MCMUtils.printEventStats("topology", event);
  		
  		if (! isBatchModeEnabled()) {
  			queue.blockingReadBuffer(associationsMem, Pointer.to(associations), 0, associationsMem.getSize());
  			queue.blockingReadBuffer(totalsMem, Pointer.to(totals), 0, totalsMem.getSize());
  		}
  		
  		fireMiorUpdated();
  	}
  	
  	@Override
  	public void doLiveImpl() {
  		//System.out.println("doLiveImpl");
  		scatterKernel.setArguments(mmMem, omMem, associationsMem, worldMem, totalsMem);
  		MCMEvent scatteredEvent = queue.enqueue1DKernel(scatterKernel, nbOM);
  		
  		if (isRandomEnabled()) {
  			liveKernel.setArguments(mmMem, omMem, associationsMem, worldMem, omIndexesMem, rand.nextLong());
  		} else {
  			liveKernel.setArguments(mmMem, omMem, associationsMem, worldMem, omIndexesMem, 0L);
  		}
  		
  		//System.out.println("scattered");
  		MCMEvent livedEvent = queue.enqueue1DKernel(liveKernel, nbMM, scatteredEvent);
  		
  		//System.out.println("lived");
  		reduceKernel.setArguments(mmMem, omMem, associationsMem, worldMem);
  		MCMEvent reducedEvent = queue.enqueue1DKernel(reduceKernel, nbOM, livedEvent);
  		
  		//System.out.println("prewait");
  		MCMEvent.waitFor(reducedEvent);
  		
  		//queue.finish();
  		
  		//System.out.println("postwait");
  		MCMUtils.printEventStats("scatter", scatteredEvent);
  		MCMUtils.printEventStats("live", livedEvent);
  		MCMUtils.printEventStats("reduce", reducedEvent);
  		
  		//System.out.println("post stats");
  		if (! isBatchModeEnabled()) {
  			queue.blockingReadBuffer(mmMem, mmList, 0, mmMem.getSize());
  			queue.blockingReadBuffer(omMem, omList, 0, omMem.getSize());
  			queue.blockingReadBuffer(associationsMem, Pointer.to(associations), 0, associationsMem.getSize());
  		}
  		
  		//System.out.println("preread");
  		
  		queue.blockingReadBuffer(worldMem, new MiorWorld[] {world}, 0, worldMem.getSize());
  	}
  	
  	protected void onSimulationFinished() {
  		if (isBatchModeEnabled()) {
  			queue.blockingReadBuffer(mmMem, mmList, 0, mmMem.getSize());
  			queue.blockingReadBuffer(omMem, omList, 0, omMem.getSize());
  			queue.blockingReadBuffer(associationsMem, Pointer.to(associations), 0, associationsMem.getSize());
  		}
  		
  		super.onSimulationFinished();
  	};
  	
  	
  	@Override
  	protected void releaseImpl() {
  		totalsMem.release();
  		omIndexesMem.release();
  		
  		associationsMem.release();
  		worldMem.release();
  		mmMem.release();
  		omMem.release();
  		
  		reduceKernel.release();
  		liveKernel.release();
  		scatterKernel.release();
  		topoKernel.release();
  		program.release();
  		queue.release();
  		context.release();
  	}
  }