#include <cpPlugins/Interface/ProcessObject.h>
#include <itkProcessObject.h>

#ifdef cpPlugins_Interface_QT4
#include <QApplication>
#include <cpPlugins/Interface/ParametersQtDialog.h>
#include <cpPlugins/Interface/SimpleMPRWidget.h>
#endif // cpPlugins_Interface_QT4

// -------------------------------------------------------------------------
std::set< std::string > cpPlugins::Interface::ProcessObject::
GetInputsNames( ) const
{
  std::set< std::string > names;
  for( auto i = this->m_Inputs.begin( ); i != this->m_Inputs.end( ); ++i )
    names.insert( i->first );
  return( names );
}

// -------------------------------------------------------------------------
std::set< std::string > cpPlugins::Interface::ProcessObject::
GetOutputsNames( ) const
{
  std::set< std::string > names;
  for( auto i = this->m_Outputs.begin( ); i != this->m_Outputs.end( ); ++i )
    names.insert( i->first );
  return( names );
}

// -------------------------------------------------------------------------
unsigned int cpPlugins::Interface::ProcessObject::
GetNumberOfInputs( ) const
{
  return( this->m_Inputs.size( ) );
}

// -------------------------------------------------------------------------
unsigned int cpPlugins::Interface::ProcessObject::
GetNumberOfOutputs( ) const
{
  return( this->m_Outputs.size( ) );
}

// -------------------------------------------------------------------------
cpPlugins::Interface::
ProcessObjectPort& cpPlugins::Interface::ProcessObject::
GetOutput( const std::string& id )
{
  static ProcessObjectPort null_port;
  auto i = this->m_Outputs.find( id );
  if( i == this->m_Outputs.end( ) )
  {
    null_port = NULL;
    return( null_port );
  }
  else
    return( i->second );
}

// -------------------------------------------------------------------------
const cpPlugins::Interface::
ProcessObjectPort& cpPlugins::Interface::ProcessObject::
GetOutput( const std::string& id ) const
{
  static const ProcessObjectPort null_port;
  auto i = this->m_Outputs.find( id );
  if( i == this->m_Outputs.end( ) )
    return( null_port );
  else
    return( i->second );
}

// -------------------------------------------------------------------------
bool cpPlugins::Interface::ProcessObject::
SetInput( const std::string& id, const ProcessObjectPort& port )
{
  auto i = this->m_Inputs.find( id );
  if( i != this->m_Inputs.end( ) )
  {
    if( i->second.GetPointer( ) != port.GetPointer( ) )
    {
      i->second = port;
      this->Modified( );

    } // fi
    return( true );
  }
  else
    return( false );
}

// -------------------------------------------------------------------------
void cpPlugins::Interface::ProcessObject::
DisconnectInputs( )
{
  auto i = this->m_Inputs.begin( );
  for( ; i != this->m_Inputs.end( ); ++i )
    i->second = NULL;
  this->Modified( );
}

// -------------------------------------------------------------------------
void cpPlugins::Interface::ProcessObject::
DisconnectOutputs( )
{
  auto i = this->m_Outputs.begin( );
  for( ; i != this->m_Outputs.end( ); ++i )
    if( i->second.IsValid( ) )
      i->second->DisconnectPipeline( );
  this->Modified( );
}

// -------------------------------------------------------------------------
void cpPlugins::Interface::ProcessObject::
Disconnect( )
{
  this->DisconnectInputs( );
  this->DisconnectOutputs( );
}

// -------------------------------------------------------------------------
itk::ModifiedTimeType cpPlugins::Interface::ProcessObject::
GetMTime( ) const
{
  auto params_time = this->m_Parameters->GetMTime( );
  auto filter_time = this->Superclass::GetMTime( );
  auto ipobj = this->GetITK< itk::ProcessObject >( );
  if( ipobj == NULL )
  {
    auto vpobj = this->GetVTK< vtkAlgorithm >( );
    if( vpobj != NULL )
      filter_time = ( const_cast< vtkAlgorithm* >( vpobj ) )->GetMTime( );
  }
  else
    filter_time = ipobj->GetMTime( );
  return( ( params_time < filter_time )? filter_time: params_time );
}

// -------------------------------------------------------------------------
std::string cpPlugins::Interface::ProcessObject::
Update( )
{
  std::string r = "";

  // Force upstream updates
  _TDataContainer::iterator i = this->m_Inputs.begin( );
  bool need_to_update = false;
  for( ; i != this->m_Inputs.end( ) && r == ""; ++i )
  {
    if( i->second.IsValid( ) )
    {
      Self* src = dynamic_cast< Self* >( i->second->GetSource( ) );
      if( src != NULL )
      {
        need_to_update |= ( this->m_LastExecutionTime < src->GetMTime( ) );
        r = src->Update( );

      } // fi
    }
    else
      r = "cpPlugins::Interface::ProcessObject: No input connected.";

  } // rof

  // Current update
  if( r == "" )
  {
    if( this->m_LastExecutionTime < this->GetMTime( ) || need_to_update )
    {
      r = this->_GenerateData( );
      this->m_LastExecutionTime = this->GetMTime( );

    } // fi

  } // fi

  // Return error description, if any
  return( r );
}

// -------------------------------------------------------------------------
cpPlugins::Interface::ProcessObject::
ProcessObject( )
  : Superclass( ),
    m_LastExecutionTime( 0 ),
    m_ParametersDialog( NULL ),
    m_MPRViewer( NULL )
{
  this->m_Parameters = TParameters::New( );
  this->m_Parameters->SetProcessObject( this );

#ifdef cpPlugins_Interface_QT4
  if( QApplication::instance( ) != NULL )
  {
    this->m_ParametersDialog = new ParametersQtDialog( );
    this->m_ParametersDialog->setParameters( this->m_Parameters );

  } // fi
#endif // cpPlugins_Interface_QT4
}

// -------------------------------------------------------------------------
cpPlugins::Interface::ProcessObject::
~ProcessObject( )
{
  this->Disconnect( );
  if( this->m_ParametersDialog != NULL )
    delete this->m_ParametersDialog;
}

// -------------------------------------------------------------------------
void cpPlugins::Interface::ProcessObject::
_AddInput( const std::string& name )
{
  typedef typename _TDataContainer::value_type _TValue;
  auto i = this->m_Inputs.find( name );
  if( i == this->m_Inputs.end( ) )
  {
    i = this->m_Inputs.insert( _TValue( name, NULL ) ).first;
    this->Modified( );

  } // fi
}

// eof - $RCSfile$