/*
 * Copyright (c) 1995, 1996 Gunther Schadow.  All rights reserved.
 *
 * This program 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 2 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 Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "carevue.h"
#include "cvgateway.h"
#include "NMDmsg.h"
#include "ACKmsg.h"
#include <strstream.h>
#include <unistd.h>
#include <parsetrace.h>

/* Process NMD messages: If message goes to us, i.e. if RecApp == App
 * is true (App is my application tag) then return ACKmsg. Otherwise
 * simply forward the message to carevue.
 */

HL7Message *network_data(HL7Message &msg)
{
  NMDmsg &request = (NMDmsg &)msg;

  if(request.MesHea.RecApp == App)
    {
      ACKmsg  &ack = *new ACKmsg;
      
      // MSA segment
      ack.MesAck.Ack = AckCode::AppAcc;
      ack.MesAck.MesConTrolId = msg.MesHea.MesConTrolId;
      ack.MesAck.TextMes = "message accepted";
      
      // ERR segment might contain warnings even for an acceptable message
      ack.Error = parseErrorSegment;
      
      // MSH segment
      ack.MesHea.SenApp = "HL7TEST";
      ack.MesHea.RecApp = msg.MesHea.SenApp;
      ack.MesHea.RecFac = msg.MesHea.SenFac;
      stamp(ack.MesHea.DateTimeOfMes);
      
      strstream s;
      s.form("RES%05u",(u_int)getpid());
      s << '\0';
      ack.MesHea.MesConTrolId = s.str();
      s.freeze(0);
      
      ack.MesHea.ProId = ProIdCode::Pro;
      ack.MesHea.VerId = VerIdCode::_2_2val;
      
      ack.commit();
      
      return &ack;
    }
  else
    {
      // since NSCseg is the only allowed segment and since the 
      // network status change type is not standardized, simply
      // unset any segment except -- of course -- MSHseg
      request.GRPgroup.unset();
      return forward_message(request);
    }
}