package org.openslx.imagemaster.serverconnection;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import org.openslx.imagemaster.crcchecker.CRCChecker;

/**
 * Class to schedule crc checks.
 */
public class CRCScheduler extends TimerTask
{

	@Override
	public void run()
	{
		List<UploadingImage> list = ImageProcessor.getImagesToCheck();
		Iterator<UploadingImage> iter = list.iterator();
		while ( iter.hasNext() ) {
			UploadingImage image = iter.next();
			CRCChecker crcChecker = new CRCChecker( image.getFilename(), image.getCrcFilename() );
			for ( int block = 0; block < image.getNumberOfBlocks(); block++ ) {
				if ( image.needsCheck( block ) ) {
					try {
						if ( crcChecker.checkBlock( block ) ) {
							image.setValid( block );
						} else {
							image.setNeedsRequest( block );
						}
					} catch ( IOException e ) {
						// TODO: Handle that crc file or image file could not be read.
					}
				}
			}
		}
	}

	public static void startScheduling()
	{
		Timer timer = new Timer( "CRCScheduler" );

		// start now and fire every 60 s
		timer.schedule( new CRCScheduler(), 0, 60000 );
	}

}