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.Encoder;
  import org.metricshub.ipmi.core.coding.commands.IpmiVersion;
  import org.metricshub.ipmi.core.coding.commands.session.GetChannelAuthenticationCapabilities;
  import org.metricshub.ipmi.core.coding.commands.session.GetChannelCipherSuites;
  import org.metricshub.ipmi.core.coding.protocol.encoder.Protocolv15Encoder;
  import org.metricshub.ipmi.core.coding.protocol.encoder.Protocolv20Encoder;
  import org.metricshub.ipmi.core.coding.rmcp.RmcpMessage;
  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.events.Default;
  import org.metricshub.ipmi.core.sm.events.GetChannelCipherSuitesPending;
  import org.metricshub.ipmi.core.sm.events.StateMachineEvent;
  
  /**
   * The initial state. Transits to {@link AuthcapWaiting} on {@link Default}, sending Get Channel Authentication
   * Capabilities in the IPMI v1.5 format, and to {@link CiphersWaiting} on {@link GetChannelCipherSuitesPending}.
   */
  public class Uninitialized extends State {
  
  	@Override
  	public void doTransition(StateMachine stateMachine, StateMachineEvent machineEvent) {
  		if (machineEvent instanceof GetChannelCipherSuitesPending) {
  			Default event = (GetChannelCipherSuitesPending) machineEvent;
  			GetChannelCipherSuites cipherSuites = new GetChannelCipherSuites(TypeConverter.intToByte(0xE), (byte) 0);
  			try {
  				stateMachine.setCurrent(new CiphersWaiting(0, event.getSequenceNumber()));
  
  				stateMachine
  						.sendMessage(Encoder.encode(new Protocolv20Encoder(), cipherSuites, event.getSequenceNumber(), 0, 0));
  			} catch (Exception e) {
  				stateMachine.setCurrent(this);
  				stateMachine.doExternalAction(new ErrorAction(e));
  			}
  		} else if (machineEvent instanceof Default) {
  			// IPMI 2.0 section 13.13: Get Channel Authentication Capabilities in the IPMI v1.5 format, which every BMC
  			// answers, with the IPMI v2.0+ extended data (table 22-15), before any RMCP+ packet
  			Default event = (Default) machineEvent;
  			GetChannelAuthenticationCapabilities authCap = new GetChannelAuthenticationCapabilities(
  					IpmiVersion.V15,
  					IpmiVersion.V20,
  					event.getCipherSuite(),
  					event.getPrivilegeLevel(),
  					TypeConverter.intToByte(0xe));
  			try {
  				stateMachine.setCurrent(new AuthcapWaiting(event.getSequenceNumber()));
  				stateMachine.sendMessage(Encoder.encode(new Protocolv15Encoder(), authCap, event.getSequenceNumber(), 0, 0));
  			} catch (Exception e) {
  				stateMachine.setCurrent(this);
  				stateMachine.doExternalAction(new ErrorAction(e));
  			}
  		} else {
  			stateMachine.doExternalAction(new ErrorAction(new IllegalArgumentException("Invalid transition")));
  		}
  	}
  
  	@Override
  	public void doAction(StateMachine stateMachine, RmcpMessage message) {
  		// No action is needed
  	}
  
  }