/*=========================================================================

  Program:   ParaView
  Module:    vtkCPCxxHelper.cxx

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkCPCxxHelper.h"

#include "vtkInitializationHelper.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkPVConfig.h" // Required to get build options for paraview
#include "vtkPVOptions.h"
#include "vtkProcessModule.h"
#include "vtkSMObject.h"
#include "vtkSMParaViewPipelineController.h"
#include "vtkSMProperty.h"
#include "vtkSMProxyManager.h"
#include "vtkSMSession.h"

// for PARAVIEW_INSTALL_DIR and PARAVIEW_BINARY_DIR variables
#include "vtkCPConfig.h"

#include <assert.h>
#include <sstream>
#include <string>
#include <vtksys/SystemTools.hxx>

vtkWeakPointer<vtkCPCxxHelper> vtkCPCxxHelper::Instance;

//----------------------------------------------------------------------------
vtkCPCxxHelper::vtkCPCxxHelper()
{
  this->Options = 0;
}

//----------------------------------------------------------------------------
vtkCPCxxHelper::~vtkCPCxxHelper()
{
  if (this->Options)
  {
    this->Options->Delete();
    this->Options = 0;
  }
  vtkInitializationHelper::Finalize();
}

//----------------------------------------------------------------------------
vtkCPCxxHelper* vtkCPCxxHelper::New()
{
  if (vtkCPCxxHelper::Instance.GetPointer() == 0)
  {
    // Try the factory first
    vtkCPCxxHelper* instance = (vtkCPCxxHelper*)vtkObjectFactory::CreateInstance("vtkCPCxxHelper");
    // if the factory did not provide one, then create it here
    if (!instance)
    {
      instance = new vtkCPCxxHelper;
    }

    vtkCPCxxHelper::Instance = instance;

// Since when coprocessing, we have no information about the executable, we
// make one up using the current working directory.
// std::string self_dir = vtksys::SystemTools::GetCurrentWorkingDirectory(/*collapse=*/true);
#if defined(_WIN32) && defined(CMAKE_INTDIR)
    std::string programname = PARAVIEW_BINARY_DIR "/bin/" CMAKE_INTDIR "/unknown_exe";
#else
    std::string programname = PARAVIEW_BINARY_DIR "/bin/unknown_exe";
#endif

    int argc = 1;
    char** argv = new char*[1];
    argv[0] = vtksys::SystemTools::DuplicateString(programname.c_str());

    vtkCPCxxHelper::Instance->Options = vtkPVOptions::New();
    vtkCPCxxHelper::Instance->Options->SetSymmetricMPIMode(1);

    // Disable vtkSMSettings processing for Catalyst applications.
    vtkInitializationHelper::SetLoadSettingsFilesDuringInitialization(false);

    vtkInitializationHelper::Initialize(
      argc, argv, vtkProcessModule::PROCESS_BATCH, vtkCPCxxHelper::Instance->Options);

    // Setup default session.
    vtkIdType connectionId = vtkSMSession::ConnectToSelf();
    assert(connectionId != 0);

    // initialize the session for a ParaView session.
    vtkNew<vtkSMParaViewPipelineController> controller;
    vtkProcessModule* pm = vtkProcessModule::GetProcessModule();
    controller->InitializeSession(vtkSMSession::SafeDownCast(pm->GetSession(connectionId)));

    delete[] argv[0];
    delete[] argv;
  }
  else
  {
    vtkCPCxxHelper::Instance->Register(NULL);
  }

  return vtkCPCxxHelper::Instance;
}

//----------------------------------------------------------------------------
void vtkCPCxxHelper::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}
