/*
    * 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 com.fasterxml.jackson.core.JsonParseException;
  import com.fasterxml.jackson.databind.JsonMappingException;
  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.localhandler.LocalChannelReference;
  import org.waarp.openr66.protocol.localhandler.packet.json.JsonPacket;
  
  import java.io.IOException;
  
  /**
   * Json Command Message class for packet
   * <p>
   * 2 strings and one byte: request,result,send
   */
  public class JsonCommandPacket extends AbstractLocalPacket {
    private final String request;
  
    private String result;
  
    private final byte send;
  
    /**
     * @param headerLength
     * @param middleLength
     * @param endLength
     * @param buf
     *
     * @return the new ValidPacket from buffer
     */
    public static JsonCommandPacket createFromBuffer(final int headerLength,
                                                     final int middleLength,
                                                     final int endLength,
                                                     final ByteBuf buf) {
      final byte[] bheader = new byte[headerLength - 1];
      final byte[] bmiddle = new byte[middleLength];
      final byte bend;
      if (headerLength - 1 > 0) {
        buf.readBytes(bheader);
      }
      if (middleLength > 0) {
        buf.readBytes(bmiddle);
      }
      bend = buf.readByte();
      return new JsonCommandPacket(new String(bheader, WaarpStringUtils.UTF8),
                                   new String(bmiddle, WaarpStringUtils.UTF8),
                                   bend);
    }
  
    /**
     * @param srequest
     * @param sresult
     * @param end
     */
    public JsonCommandPacket(final String srequest, final String sresult,
                             final byte end) {
      request = srequest;
      result = sresult;
      send = end;
    }
  
    /**
     * @param jrequest
     * @param end
     */
    public JsonCommandPacket(final JsonPacket jrequest, final byte end) {
      request = jrequest.toString();
      result = null;
      send = end;
    }
  
    /**
     * @param jrequest
     * @param sresult
     * @param end
     */
    public JsonCommandPacket(final JsonPacket jrequest, final String sresult,
                            final byte end) {
     request = jrequest.toString();
     result = sresult;
     send = end;
   }
 
   @Override
   public final boolean hasGlobalBuffer() {
     return true;
   }
 
   @Override
   public final synchronized void createAllBuffers(
       final LocalChannelReference lcr, final int networkHeader) {
     final byte[] headerBytes =
         request != null? request.getBytes(WaarpStringUtils.UTF8) : EMPTY_ARRAY;
     final int headerSize = headerBytes.length;
     final byte[] middleBytes =
         result != null? result.getBytes(WaarpStringUtils.UTF8) : EMPTY_ARRAY;
     final int middleSize = middleBytes.length;
     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);
     if (request != null) {
       header.writeBytes(headerBytes);
     }
     offset += headerSize;
     middle = WaarpNettyUtil.slice(global, offset, middleSize);
     if (result != null) {
       middle.writeBytes(middleBytes);
     }
     offset += middleSize;
     end = WaarpNettyUtil.slice(global, offset, endSize);
     end.writeByte(send);
   }
 
   @Override
   public final String toString() {
     return "JsonCommandPacket: " + request + ':' + result + ':' + send;
   }
 
   @Override
   public final byte getType() {
     return LocalPacketFactory.JSONREQUESTPACKET;
   }
 
   /**
    * @return the JsonPacket from request
    */
   public final JsonPacket getJsonRequest() {
     try {
       return JsonPacket.createFromBuffer(request);
     } catch (final JsonParseException e) {
       return null;
     } catch (final JsonMappingException e) {
       return null;
     } catch (final IOException e) {
       return null;
     }
   }
 
   /**
    * @param result
    */
   public final void setResult(final String result) {
     this.result = result;
     middle = null;
   }
 
   /**
    * @return the request
    */
   public final String getRequest() {
     return request;
   }
 
   /**
    * @return the result
    */
   public final String getResult() {
     return result;
   }
 
   /**
    * @return the type
    */
   public final byte getTypeValid() {
     return send;
   }
 
 }