#include <cpPlugins/ProcessObject.h>
#include <cpPlugins/ParametersQtDialog.h>
#include <itkProcessObject.h>
#include <itkExceptionObject.h>

// -------------------------------------------------------------------------
cpPlugins::Parameters* cpPlugins::ProcessObject::
GetParameters( )
{
  return( &( this->m_Parameters ) );
}

// -------------------------------------------------------------------------
const cpPlugins::Parameters* cpPlugins::ProcessObject::
GetParameters( ) const
{
  return( &( this->m_Parameters ) );
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
SetITK( itk::LightObject* o )
{
  // Polymorphism: do nothing -> this is a filter!!!
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
SetVTK( vtkObjectBase* o )
{
  // Polymorphism: do nothing -> this is a filter!!!
}

// -------------------------------------------------------------------------
std::set< std::string > cpPlugins::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::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::ProcessObject::
GetNumberOfInputs( ) const
{
  return( this->m_Inputs.size( ) );
}

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

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

// -------------------------------------------------------------------------
bool cpPlugins::ProcessObject::
SetInputPort( const std::string& id, const OutputPort& 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::ProcessObject::
DisconnectInputs( )
{
  auto i = this->m_Inputs.begin( );
  for( ; i != this->m_Inputs.end( ); ++i )
    i->second = NULL;
  this->Modified( );
}

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

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

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
Modified( ) const
{
  this->Superclass::Modified( );
  this->m_LastExecutionSpan = -1;
}

// -------------------------------------------------------------------------
itk::ModifiedTimeType cpPlugins::ProcessObject::
GetMTime( ) const
{
  auto params_time = this->m_Parameters.GetMTime( );
  auto filter_time = this->Superclass::GetMTime( );
  return( ( params_time > filter_time )? params_time: filter_time );
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
Update( )
{
  // Force upstream updates
  auto i = this->m_Inputs.begin( );
  bool need_to_update = false;
  for( ; i != this->m_Inputs.end( ); ++i )
  {
    bool iv = i->second.IsValid( );
    bool ir = i->second.IsRequired( );
    if( !iv && ir )
      this->_Error(
        std::string( "Required input \"" ) + i->first +
        std::string( "\" is not valid." )
        );
    if( iv )
    {
      Self* src = dynamic_cast< Self* >( i->second->GetSource( ) );
      if( src != NULL )
      {
        need_to_update |= ( this->m_LastExecutionTime < src->GetMTime( ) );
        src->Update( );

      } // fi

    } // fi

  } // rof

  // Current update
  if( this->m_LastExecutionTime < this->GetMTime( ) || need_to_update )
  {
    if( this->m_PrintExecution && this->m_PrintExecutionStream != NULL )
    {
      *( this->m_PrintExecutionStream )
        << "cpPlugins: Updating \""
        << this->GetClassCategory( ) << ":" << this->GetClassName( )
        << "\"... ";
      this->m_PrintExecutionStream->flush( );

    } // fi

    auto t_start = cpPlugins_CHRONO;
    this->_GenerateData( );
    auto t_end = cpPlugins_CHRONO;
    this->m_LastExecutionSpan = long( t_end - t_start );
    this->m_LastExecutionTime = this->GetMTime( );

    if( this->m_PrintExecution && this->m_PrintExecutionStream != NULL )
    {
      *( this->m_PrintExecutionStream )
        << "done in "
        << double( this->m_LastExecutionSpan ) / double( 1000 )
        << " s." << std::endl;

    } // fi

  } // fi
}

// -------------------------------------------------------------------------
cpPlugins::ParametersQtDialog* cpPlugins::ProcessObject::
CreateQtDialog( )
{
#ifdef cpPlugins_QT4
  ParametersQtDialog* dlg = NULL;
  if( QApplication::instance( ) != NULL )
  {
    dlg = new ParametersQtDialog( );
    dlg->setProcessObject( this );

  } // fi
  return( dlg );
#else // cpPlugins_QT4  
  return( NULL );
#endif // cpPlugins_QT4
}

// -------------------------------------------------------------------------
bool cpPlugins::ProcessObject::
IsInteractive( )
{
  return( false );
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
SetInteractionObjects( const std::vector< void* >& objs )
{
  // Do nothing
}

// -------------------------------------------------------------------------
cpPlugins::ProcessObject::
ProcessObject( )
  : Superclass( ),
    m_LastExecutionTime( 0 ),
    m_LastExecutionSpan( -1 ),
    m_PrintExecution( false ),
    m_PrintExecutionStream( &( std::cout ) )
{
}

// -------------------------------------------------------------------------
cpPlugins::ProcessObject::
~ProcessObject( )
{
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
_AddInput( const std::string& name, bool required )
{
  auto i = this->m_Inputs.find( name );
  if( i == this->m_Inputs.end( ) )
  {
    this->m_Inputs[ name ] = InputPort( required );
    this->Modified( );

  } // fi
}

// -------------------------------------------------------------------------
void cpPlugins::ProcessObject::
_Error( const std::string& error )
{
  if( error != "" )
  {
    itkExceptionMacro(
      "Error: \"" << this->GetClassCategory( ) << "::" <<
      this->GetClassName( ) << "\": " << error
      );

  } // fi
}

// eof - $RCSfile$