/*
    * This file is part of Waarp Project (named also Waarp or GG).
    *
    *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
    *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
    * individual contributors.
    *
    *  All Waarp Project 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.
   *
   * Waarp 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
   * Waarp . If not, see <http://www.gnu.org/licenses/>.
   */
  package org.waarp.openr66.protocol.localhandler.packet;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.ByteBufAllocator;
  import org.waarp.common.utility.WaarpNettyUtil;
  import org.waarp.common.utility.WaarpStringUtils;
  import org.waarp.openr66.protocol.exception.OpenR66ProtocolPacketException;
  import org.waarp.openr66.protocol.localhandler.LocalChannelReference;
  
  /**
   * Business Request Message class for packet
   * <p>
   * 1 string and on integer and one byte:<br>
   * - sheader = full text with class at first place, following (space separated)
   * by extra arguments - smiddle =
   * integer - send = byte
   */
  public class BusinessRequestPacket extends AbstractLocalPacket {
    private static final byte ASKVALIDATE = 0;
  
    private static final byte ANSWERVALIDATE = 1;
    private static final byte ANSWERINVALIDATE = 2;
  
    private final String sheader;
  
    private int delay;
  
    private byte way;
  
    public static BusinessRequestPacket createFromBuffer(final int headerLength,
                                                         final int middleLength,
                                                         final int endLength,
                                                         final ByteBuf buf)
        throws OpenR66ProtocolPacketException {
      final byte[] bheader = new byte[headerLength - 1];
      if (headerLength - 1 > 0) {
        buf.readBytes(bheader);
      }
      if (middleLength != 4) {
        throw new OpenR66ProtocolPacketException("Packet not correct");
      }
      final int delay = buf.readInt();
      if (endLength != 1) {
        throw new OpenR66ProtocolPacketException("Packet not correct");
      }
      final byte valid = buf.readByte();
      return new BusinessRequestPacket(new String(bheader, WaarpStringUtils.UTF8),
                                       delay, valid);
    }
  
    public BusinessRequestPacket(final String header, final int delay,
                                 final byte way) {
      sheader = header;
      this.delay = delay;
      this.way = way;
    }
  
    public BusinessRequestPacket(final String header, final int delay) {
      sheader = header;
      this.delay = delay;
      way = ASKVALIDATE;
    }
  
    @Override
    public final boolean hasGlobalBuffer() {
      return true;
    }
  
    @Override
    public final synchronized void createAllBuffers(
        final LocalChannelReference lcr, final int networkHeader) {
      final byte[] headerBytes = sheader.getBytes(WaarpStringUtils.UTF8);
      final int headerSize = headerBytes.length;
      final int middleSize = 4;
      final int endSize = 1;
      final int globalSize =
          networkHeader + LOCAL_HEADER_SIZE + headerSize + middleSize + endSize;
      int offset = networkHeader + LOCAL_HEADER_SIZE;
      global = ByteBufAllocator.DEFAULT.ioBuffer(globalSize, globalSize);
      header = WaarpNettyUtil.slice(global, offset, headerSize);
     header.writeBytes(headerBytes);
     offset += headerSize;
     middle = WaarpNettyUtil.slice(global, offset, middleSize);
     middle.writeInt(delay);
     offset += middleSize;
     end = WaarpNettyUtil.slice(global, offset, endSize);
     end.writeByte(way);
     WaarpNettyUtil.retain(global);
   }
 
   @Override
   public final byte getType() {
     return LocalPacketFactory.BUSINESSREQUESTPACKET;
   }
 
   @Override
   public final String toString() {
     return "BusinessRequestPacket: " + sheader + ':' + delay + ':' + way;
   }
 
   /**
    * @return True if this packet is to be validated
    */
   public final boolean isToValidate() {
     return way == ASKVALIDATE;
   }
 
   /**
    * Validate the request
    */
   public final void validate() {
     way = ANSWERVALIDATE;
     clear();
   }
 
   /**
    * Invalidate the request
    */
   public final void invalidate() {
     way = ANSWERINVALIDATE;
     clear();
   }
 
   /**
    * @return the sheader
    */
   public final String getSheader() {
     return sheader;
   }
 
   /**
    * @return the delay
    */
   public final int getDelay() {
     return delay;
   }
 
   /**
    * @param delay the delay to set
    */
   public final void setDelay(final int delay) {
     this.delay = delay;
     WaarpNettyUtil.release(middle);
     middle = null;
   }
 }