/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2020 Osimis S.A., Belgium
 *
 * 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 3 of the
 * License, or (at your option) any later version.
 *
 * In addition, as a special exception, the copyright holders of this
 * program give permission to link the code of its release with the
 * OpenSSL project's "OpenSSL" library (or with modified versions of it
 * that use the same license as the "OpenSSL" library), and distribute
 * the linked executables. You must obey the GNU General Public License
 * in all respects for all of the code used other than "OpenSSL". If you
 * modify file(s) with this exception, you may extend this exception to
 * your version of the file(s), but you are not obligated to do so. If
 * you do not wish to do so, delete this exception statement from your
 * version. If you delete this exception statement from all source files
 * in the program, then also delete it here.
 * 
 * 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, see <http://www.gnu.org/licenses/>.
 **/


#include "../PrecompiledHeaders.h"
#include "DicomAssociationParameters.h"

#include "../Compatibility.h"
#include "../Logging.h"
#include "../OrthancException.h"
#include "../SerializationToolbox.h"
#include "NetworkingCompatibility.h"

#include <boost/thread/mutex.hpp>

// By default, the timeout for client DICOM connections is set to 10 seconds
static boost::mutex  defaultTimeoutMutex_;
static uint32_t defaultTimeout_ = 10;


namespace Orthanc
{
  void DicomAssociationParameters::CheckHost(const std::string& host)
  {
    if (host.size() > HOST_NAME_MAX - 10)
    {
      throw OrthancException(ErrorCode_ParameterOutOfRange,
                             "Invalid host name (too long): " + host);
    }
  }

  
  uint32_t DicomAssociationParameters::GetDefaultTimeout()
  {
    boost::mutex::scoped_lock lock(defaultTimeoutMutex_);
    return defaultTimeout_;
  }


  DicomAssociationParameters::DicomAssociationParameters() :
    localAet_("ORTHANC"),
    timeout_(GetDefaultTimeout())
  {
    remote_.SetApplicationEntityTitle("ANY-SCP");
  }

    
  DicomAssociationParameters::DicomAssociationParameters(const std::string& localAet,
                                                         const RemoteModalityParameters& remote) :
    localAet_(localAet),
    timeout_(GetDefaultTimeout())
  {
    SetRemoteModality(remote);
  }

    
  void DicomAssociationParameters::SetRemoteModality(const RemoteModalityParameters& remote)
  {
    CheckHost(remote.GetHost());
    remote_ = remote;
  }


  void DicomAssociationParameters::SetRemoteHost(const std::string& host)
  {
    CheckHost(host);
    remote_.SetHost(host);
  }


  bool DicomAssociationParameters::IsEqual(const DicomAssociationParameters& other) const
  {
    return (localAet_ == other.localAet_ &&
            remote_.GetApplicationEntityTitle() == other.remote_.GetApplicationEntityTitle() &&
            remote_.GetHost() == other.remote_.GetHost() &&
            remote_.GetPortNumber() == other.remote_.GetPortNumber() &&
            remote_.GetManufacturer() == other.remote_.GetManufacturer() &&
            timeout_ == other.timeout_);
  }


  static const char* const LOCAL_AET = "LocalAet";
  static const char* const REMOTE = "Remote";
  static const char* const TIMEOUT = "Timeout";  // New in Orthanc in 1.7.0

  
  void DicomAssociationParameters::SerializeJob(Json::Value& target) const
  {
    if (target.type() != Json::objectValue)
    {
      throw OrthancException(ErrorCode_InternalError);
    }
    else
    {
      target[LOCAL_AET] = localAet_;
      remote_.Serialize(target[REMOTE], true /* force advanced format */);
      target[TIMEOUT] = timeout_;
    }
  }


  DicomAssociationParameters DicomAssociationParameters::UnserializeJob(const Json::Value& serialized)
  {
    if (serialized.type() == Json::objectValue)
    {
      DicomAssociationParameters result;
    
      result.remote_ = RemoteModalityParameters(serialized[REMOTE]);
      result.localAet_ = SerializationToolbox::ReadString(serialized, LOCAL_AET);
      result.timeout_ = SerializationToolbox::ReadInteger(serialized, TIMEOUT, GetDefaultTimeout());

      return result;
    }
    else
    {
      throw OrthancException(ErrorCode_BadFileFormat);
    }
  }
    

  void DicomAssociationParameters::SetDefaultTimeout(uint32_t seconds)
  {
    LOG(INFO) << "Default timeout for DICOM connections if Orthanc acts as SCU (client): " 
              << seconds << " seconds (0 = no timeout)";

    {
      boost::mutex::scoped_lock lock(defaultTimeoutMutex_);
      defaultTimeout_ = seconds;
    }
  }
}