package org.openslx.imagemaster.serverconnection;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Helper class for the ImageProcessor and ConnectionHandler to know some things about the downloading client
 */
public class DownloadingClient
{

	private final HashMap<String, ImageInfos> downloadingImages = new HashMap<>();

	public void addDownload( String uuid, List<Integer> list, String token )
	{
		downloadingImages.put( uuid, new ImageInfos( uuid, list, token ) );
	}

	public void removeDownload( String uuid )
	{
		downloadingImages.remove( uuid );
	}

	public boolean isDownloading( String uuid )
	{
		return downloadingImages.containsKey( uuid );
	}
	
	public boolean hasDownloads()
	{
		return (downloadingImages.size() > 0);
	}

	public List<Integer> getLastRequestedBlocks( String token )
	{
		for (Map.Entry<String, ImageInfos> entry : downloadingImages.entrySet() ) {
			if (entry.getValue().token.equals( token )) return entry.getValue().lastRequestedBlocks;
		}
		return null;
	}

	public void requestBlocks( String uuid, List<Integer> list )
	{
		if ( !downloadingImages.containsKey( uuid ) )
			return;
		downloadingImages.get( uuid ).lastRequestedBlocks = list;
	}

	public String getToken( String uuid )
	{
		if ( !downloadingImages.containsKey( uuid ) )
			return null;
		return downloadingImages.get( uuid ).token;
	}
	
	class ImageInfos
	{
		public final String uuid;
		public final String token;
		private List<Integer> lastRequestedBlocks;

		ImageInfos(String uuid, List<Integer> list, String token)
		{
			this.uuid = uuid;
			this.lastRequestedBlocks = list;
			this.token = token;
		}
	}

}