/* 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, 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.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package com.l2dot.loginserver;

import java.nio.ByteBuffer;


import com.l2dot.loginserver.L2LoginClient.LoginClientState;
import com.l2dot.loginserver.clientpackets.AuthGameGuard;
import com.l2dot.loginserver.clientpackets.RequestAuthLogin;
import com.l2dot.loginserver.clientpackets.RequestServerList;
import com.l2dot.loginserver.clientpackets.RequestServerLogin;
import com.l2jserver.mmocore.network.IPacketHandler;
import com.l2jserver.mmocore.network.ReceivablePacket;

/**
 * Handler for packets received by Login Server
 *
 * @author  KenM
 */
public final class L2LoginPacketHandler implements IPacketHandler<L2LoginClient>
{
	/**
	 * @see com.l2jserver.mmocore.network.IPacketHandler#handlePacket(java.nio.ByteBuffer, com.l2jserver.mmocore.interfaces.MMOClient)
	 */
	public ReceivablePacket<L2LoginClient> handlePacket(ByteBuffer buf, L2LoginClient client)
	{
		int opcode = buf.get() & 0xFF;

		ReceivablePacket<L2LoginClient> packet = null;
		LoginClientState state = client.getState();

		switch (state)
		{
			case CONNECTED:
				if (opcode == 0x07)
				{
					packet = new AuthGameGuard();
				}
				else
				{
					debugOpcode(opcode, state);
				}
				break;
			case AUTHED_GG:
				if (opcode == 0x00)
				{
					packet = new RequestAuthLogin();
				}
				else
				{
					debugOpcode(opcode, state);
				}
				break;
			case AUTHED_LOGIN:
				if (opcode == 0x05)
				{
					packet = new RequestServerList();
				}
				else if (opcode == 0x02)
				{
					packet = new RequestServerLogin();
				}
				else
				{
					debugOpcode(opcode, state);
				}
				break;
		}
		return packet;
	}

	private void debugOpcode(int opcode, LoginClientState state)
	{
		System.out.println("Unknown Opcode: "+opcode+" for state: "+state.name());
	}
}
