/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2016, TeleStax Inc. and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

package org.mobicents.diameter.impl.ha.common.s13;

import java.io.Serializable;
import java.nio.ByteBuffer;

import org.restcomm.cache.FqnWrapper;
import org.jdiameter.api.AvpDataException;
import org.jdiameter.api.Request;
import org.jdiameter.client.api.IContainer;
import org.jdiameter.client.api.IMessage;
import org.jdiameter.client.api.parser.IMessageParser;
import org.jdiameter.client.api.parser.ParseException;
import org.jdiameter.common.api.app.s13.IS13SessionData;
import org.jdiameter.common.api.app.s13.S13SessionState;
import org.restcomm.cluster.MobicentsCluster;
import org.mobicents.diameter.impl.ha.common.AppSessionDataReplicatedImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author <a href="mailto:baranowb@gmail.com"> Bartosz Baranowski </a>
 * @author <a href="mailto:brainslog@gmail.com"> Alexandre Mendonca </a>
 */
public abstract class S13SessionDataReplicatedImpl extends AppSessionDataReplicatedImpl implements IS13SessionData {

  private static final Logger logger = LoggerFactory.getLogger(S13SessionDataReplicatedImpl.class);

  private static final String STATE = "STATE";
  private static final String BUFFER = "BUFFER";
  private static final String TS_TIMERID = "TS_TIMERID";

  private IMessageParser messageParser;

  /**
   * @param nodeFqnWrapper
   * @param mobicentsCluster
   * @param container
   */
  public S13SessionDataReplicatedImpl(FqnWrapper nodeFqnWrapper, MobicentsCluster mobicentsCluster, IContainer container) {
    super(nodeFqnWrapper, mobicentsCluster);
    this.messageParser = container.getAssemblerFacility().getComponentInstance(IMessageParser.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see org.jdiameter.common.api.app.s13.IS13SessionData#setS13SessionState(org.jdiameter.common.api.app.s13.S13SessionState)
   */
  @Override
  public void setS13SessionState(S13SessionState state) {
    if (exists()) {
      putNodeValue(STATE, state);
    }
    else {
      throw new IllegalStateException();
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.jdiameter.common.api.app.s13.IS13SessionData#getS13SessionState()
   */
  @Override
  public S13SessionState getS13SessionState() {
    if (exists()) {
      return (S13SessionState) getNodeValue(STATE);
    }
    else {
      throw new IllegalStateException();
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.jdiameter.common.api.app.s13.IS13SessionData#getTsTimerId()
   */
  @Override
  public Serializable getTsTimerId() {
    if (exists()) {
      return (Serializable) getNodeValue(TS_TIMERID);
    }
    else {
      throw new IllegalStateException();
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.jdiameter.common.api.app.s13.IS13SessionData#setTsTimerId(java.io.Serializable)
   */
  @Override
  public void setTsTimerId(Serializable tid) {
    if (exists()) {
      putNodeValue(TS_TIMERID, tid);
    }
    else {
      throw new IllegalStateException();
    }
  }

  @Override
  public Request getBuffer() {
    byte[] data = (byte[]) getNodeValue(BUFFER);
    if (data != null) {
      try {
        return this.messageParser.createMessage(ByteBuffer.wrap(data));
      }
      catch (AvpDataException e) {
        logger.error("Unable to recreate message from buffer.");
        return null;
      }
    }
    else {
      return null;
    }
  }

  @Override
  public void setBuffer(Request buffer) {
    if (buffer != null) {
      try {
        byte[] data = this.messageParser.encodeMessage((IMessage) buffer).array();
        putNodeValue(BUFFER, data);
      }
      catch (ParseException e) {
        logger.error("Unable to encode message to buffer.");
      }
    }
    else {
      removeNodeValue(BUFFER);
    }
  }
}