/*
 * Created on Mar 7, 2012
 * Created by Paul Gardner
 *
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


package com.biglybt.core.peermanager.messaging.bittorrent.ltep;

import com.biglybt.core.peermanager.messaging.Message;
import com.biglybt.core.peermanager.messaging.MessageException;
import com.biglybt.core.util.DirectByteBuffer;
import com.biglybt.core.util.DirectByteBufferPool;

public class
UTUploadOnly
	implements LTMessage
{
	private final byte version;
	private DirectByteBuffer buffer = null;

	private final boolean	upload_only;

	public
	UTUploadOnly(
		boolean		_upload_only,
		byte		_version )
	{
		upload_only		= _upload_only;
		version			= _version;
	}

	@Override
	public String
	getID()
	{
		return( ID_UT_UPLOAD_ONLY );
	}

	@Override
	public byte[]
	getIDBytes()
	{
		return( ID_UT_UPLOAD_ONLY_BYTES );
	}

	@Override
	public String
	getFeatureID()
	{
		return LTMessage.LT_FEATURE_ID;
	}

	@Override
	public int
	getFeatureSubID()
	{
		return SUBID_UT_UPLOAD_ONLY;
	}

	@Override
	public int
	getType()
	{
		return Message.TYPE_PROTOCOL_PAYLOAD;
	}

	@Override
	public byte
	getVersion()
	{
		return version;
	}

	@Override
	public String
	getDescription()
	{
		return( ID_UT_UPLOAD_ONLY);
	}

	public boolean
	isUploadOnly()
	{
		return( upload_only );
	}

	@Override
	public DirectByteBuffer[]
	getData()
	{
		if ( buffer == null) {

			buffer = DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_MSG_LT_HANDSHAKE, 1 );

			buffer.put(DirectByteBuffer.SS_MSG, (byte)(upload_only?1:0));
			buffer.flip(DirectByteBuffer.SS_MSG);
		}

		return( new DirectByteBuffer[]{ buffer });
	}

	@Override
	public Message
	deserialize(
		DirectByteBuffer 	data,
		byte 				version )

		throws MessageException
	{
		byte[] dict_bytes = new byte[ Math.min( 128, data.remaining( DirectByteBuffer.SS_MSG )) ];

		data.get( DirectByteBuffer.SS_MSG, dict_bytes );

		if ( dict_bytes.length != 1 ){

			throw( new MessageException( "decode failed: incorrect length" ));
		}

		boolean ulo = dict_bytes[0] != 0;

		return( new UTUploadOnly( ulo, version ));
	}

	@Override
	public void
	destroy()
	{
		if ( buffer != null ){

			buffer.returnToPool();
		}
	}
}