/*
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package silentium.authserver.network.serverpackets;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * This class ...
 *
 * @version $Revision: 1.2.4.1 $ $Date: 2005/03/27 15:30:11 $
 */
public abstract class ServerBasePacket {
	private final ByteArrayOutputStream _bao;

	protected ServerBasePacket() {
		_bao = new ByteArrayOutputStream();
	}

	protected void writeD(final int value) {
		_bao.write(value & 0xff);
		_bao.write(value >> 8 & 0xff);
		_bao.write(value >> 16 & 0xff);
		_bao.write(value >> 24 & 0xff);
	}

	protected void writeH(final int value) {
		_bao.write(value & 0xff);
		_bao.write(value >> 8 & 0xff);
	}

	protected void writeC(final int value) {
		_bao.write(value & 0xff);
	}

	protected void writeF(final double org) {
		final long value = Double.doubleToRawLongBits(org);
		_bao.write((int) (value & 0xff));
		_bao.write((int) (value >> 8 & 0xff));
		_bao.write((int) (value >> 16 & 0xff));
		_bao.write((int) (value >> 24 & 0xff));
		_bao.write((int) (value >> 32 & 0xff));
		_bao.write((int) (value >> 40 & 0xff));
		_bao.write((int) (value >> 48 & 0xff));
		_bao.write((int) (value >> 56 & 0xff));
	}

	protected void writeS(final String text) {
		try {
			if (text != null) {
				_bao.write(text.getBytes("UTF-16LE"));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}

		_bao.write(0);
		_bao.write(0);
	}

	protected void writeB(final byte... array) {
		try {
			_bao.write(array);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public int getLength() {
		return _bao.size() + 2;
	}

	public byte[] getBytes() {
		// if (this instanceof Init)
		// writeD(0x00); //reserve for XOR initial key

		writeD(0x00); // reserve for checksum

		final int padding = _bao.size() % 8;
		if (padding != 0) {
			for (int i = padding; i < 8; i++) {
				writeC(0x00);
			}
		}

		return _bao.toByteArray();
	}

	public abstract byte[] getContent() throws IOException;
}