package org.metricshub.ipmi.core.sm.states;
   
   /*-
    * ╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲
    * IPMI Java Client
    * ჻჻჻჻჻჻
    * Copyright 2023 Verax Systems, MetricsHub
    * ჻჻჻჻჻჻
    * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser 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 Lesser Public License for more details.
   *
   * You should have received a copy of the GNU General Lesser Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/lgpl-3.0.html>.
   * ╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱
   */
  
  import org.metricshub.ipmi.core.coding.commands.session.Rakp1;
  import org.metricshub.ipmi.core.coding.commands.session.Rakp1ResponseData;
  import org.metricshub.ipmi.core.coding.commands.session.Rakp3;
  import org.metricshub.ipmi.core.coding.payload.PlainMessage;
  import org.metricshub.ipmi.core.coding.protocol.AuthenticationType;
  import org.metricshub.ipmi.core.coding.protocol.IpmiMessage;
  import org.metricshub.ipmi.core.coding.protocol.PayloadType;
  import org.metricshub.ipmi.core.coding.protocol.decoder.PlainCommandv20Decoder;
  import org.metricshub.ipmi.core.coding.protocol.decoder.ProtocolDecoder;
  import org.metricshub.ipmi.core.coding.protocol.decoder.Protocolv20Decoder;
  import org.metricshub.ipmi.core.coding.rmcp.RmcpMessage;
  import org.metricshub.ipmi.core.coding.security.CipherSuite;
  import org.metricshub.ipmi.core.common.TypeConverter;
  import org.metricshub.ipmi.core.sm.StateMachine;
  import org.metricshub.ipmi.core.sm.actions.ErrorAction;
  import org.metricshub.ipmi.core.sm.actions.ResponseAction;
  import org.metricshub.ipmi.core.sm.events.DefaultAck;
  import org.metricshub.ipmi.core.sm.events.StateMachineEvent;
  import org.metricshub.ipmi.core.sm.events.Timeout;
  
  /**
   * At this point of session challenge, RAKP Message 3 was sent,
   * {@link StateMachine} is waiting for RAKP Message 4.<br>
   * Transition to:
   * <ul>
   * <li>{@link Rakp3Complete} on {@link DefaultAck}</li>
   * <li>{@link Authcap} on {@link Timeout}</li>
   * </ul>
   */
  public class Rakp3Waiting extends State {
  
  	private Rakp1 rakp1;
  	private Rakp1ResponseData rakp1ResponseData;
  	private CipherSuite cipherSuite;
  	private int tag;
  
  	/**
  	 * Initiates state.
  	 *
  	 * @param rakp1
  	 *        - the {@link Rakp1} message that was sent earlier in the
  	 *        authentification process.
  	 * @param rakp1ResponseData
  	 *        - the {@link Rakp1ResponseData} that was received earlier in
  	 *        the authentification process.
  	 * @param cipherSuite
  	 *        - the {@link CipherSuite} used during this session.
  	 */
  	public Rakp3Waiting(int tag, Rakp1 rakp1, Rakp1ResponseData rakp1ResponseData, CipherSuite cipherSuite) {
  		this.rakp1 = rakp1;
  		this.rakp1ResponseData = rakp1ResponseData;
  		this.cipherSuite = cipherSuite;
  		this.tag = tag;
  	}
  
  	@Override
  	public void doTransition(StateMachine stateMachine, StateMachineEvent machineEvent) {
  		if (machineEvent instanceof DefaultAck) {
  			stateMachine.setCurrent(new Rakp3Complete());
  		} else if (machineEvent instanceof Timeout) {
  			stateMachine.setCurrent(new Authcap());
  		} else {
  			stateMachine.doExternalAction(new ErrorAction(new IllegalArgumentException("Invalid transition")));
  		}
  	}
  
  	@Override
  	public void doAction(StateMachine stateMachine, RmcpMessage message) {
  		if (ProtocolDecoder.decodeAuthenticationType(message) != AuthenticationType.RMCPPlus) {
  			return; // this isn't IPMI v2.0 message so we ignore it
  		}
  		PlainCommandv20Decoder decoder = new PlainCommandv20Decoder(CipherSuite.getEmpty());
  		if (Protocolv20Decoder.decodePayloadType(message.getData()[1]) != PayloadType.Rakp4) {
  			return;
  		}
 
 		IpmiMessage ipmiMessage = null;
 		Rakp3 rakp3 = new Rakp3(cipherSuite, rakp1, rakp1ResponseData);
 		try {
 			ipmiMessage = decoder.decode(message);
 			if (rakp3.isCommandResponse(ipmiMessage)
 					&& TypeConverter.byteToInt(((PlainMessage) ipmiMessage.getPayload()).getPayloadData()[0]) == tag) {
 				stateMachine.doExternalAction(new ResponseAction(rakp3.getResponseData(ipmiMessage)));
 			}
 		} catch (Exception e) {
 			stateMachine.setCurrent(new Authcap());
 			stateMachine.doExternalAction(new ErrorAction(e));
 		}
 	}
 
 }