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

  Program:   Visualization Toolkit
  Module:    vtkSocketController.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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 "vtkSocketController.h"

#include "vtkObjectFactory.h"
#include "vtkProcessGroup.h"
#include "vtkSocketCommunicator.h"

#if defined(_WIN32) && !defined(__CYGWIN__)
#define VTK_WINDOWS_FULL
#include "vtkWindows.h"
#define WSA_VERSION MAKEWORD(1, 1)
#endif

int vtkSocketController::Initialized = 0;

vtkStandardNewMacro(vtkSocketController);

//------------------------------------------------------------------------------
vtkSocketController::vtkSocketController()
{
  this->Communicator = vtkSocketCommunicator::New();
  this->RMICommunicator = this->Communicator;
}

//------------------------------------------------------------------------------
vtkSocketController::~vtkSocketController()
{
  this->Communicator->Delete();
  this->Communicator = this->RMICommunicator = nullptr;
}

//------------------------------------------------------------------------------
void vtkSocketController::Initialize(int*, char***)
{
  if (vtkSocketController::Initialized)
  {
    vtkWarningMacro("Already initialized.");
    return;
  }

#if defined(_WIN32) && !defined(__CYGWIN__)
  WSAData wsaData;
  if (WSAStartup(WSA_VERSION, &wsaData))
  {
    vtkErrorMacro("Could not initialize sockets !");
  }
#endif
  vtkSocketController::Initialized = 1;
}

//------------------------------------------------------------------------------
void vtkSocketController::SetCommunicator(vtkSocketCommunicator* comm)
{
  if (comm == this->Communicator)
  {
    return;
  }
  if (this->Communicator)
  {
    this->Communicator->UnRegister(this);
  }
  this->Communicator = comm;
  this->RMICommunicator = comm;
  if (comm)
  {
    comm->Register(this);
  }
}

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

//------------------------------------------------------------------------------
int vtkSocketController::WaitForConnection(int port)
{
  return vtkSocketCommunicator::SafeDownCast(this->Communicator)->WaitForConnection(port);
}

//------------------------------------------------------------------------------
void vtkSocketController::CloseConnection()
{
  vtkSocketCommunicator::SafeDownCast(this->Communicator)->CloseConnection();
}

//------------------------------------------------------------------------------
int vtkSocketController::ConnectTo(const char* hostName, int port)
{
  return vtkSocketCommunicator::SafeDownCast(this->Communicator)->ConnectTo(hostName, port);
}

//------------------------------------------------------------------------------
int vtkSocketController::GetSwapBytesInReceivedData()
{
  return vtkSocketCommunicator::SafeDownCast(this->Communicator)->GetSwapBytesInReceivedData();
}

//------------------------------------------------------------------------------
vtkMultiProcessController* vtkSocketController::CreateCompliantController()
{
  vtkProcessGroup* group = vtkProcessGroup::New();
  group->Initialize(this->Communicator);
  group->RemoveAllProcessIds();

  // This hack creates sub controllers with differing orders of the processes
  // that will map the ids to be unique on each process.
  if (vtkSocketCommunicator::SafeDownCast(this->Communicator)->GetIsServer())
  {
    group->AddProcessId(1);
    group->AddProcessId(0);
  }
  else
  {
    group->AddProcessId(0);
    group->AddProcessId(1);
  }

  vtkMultiProcessController* compliantController = this->CreateSubController(group);

  group->Delete();

  return compliantController;
}