#include <cstdlib>
#include <iostream>
#include <string>

#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>

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

#include <cpExtensions/Visualization/ImageSliceActors.h>


#include <cpExtensions/Visualization/ImageBlender.h>
#include <vtkPNGWriter.h>


// -------------------------------------------------------------------------
typedef cpPlugins::Interface::Interface     TInterface;
typedef cpPlugins::Interface::ProcessObject TProcessObject;
typedef cpPlugins::Interface::DataObject    TDataObject;
typedef cpPlugins::Interface::Image         TImage;
typedef cpPlugins::Interface::Parameters    TParameters;
typedef TInterface::TClasses                TClasses;

typedef cpExtensions::Visualization::ImageSliceActors TSliceActors;

// -------------------------------------------------------------------------
int main( int argc, char* argv[] )
{
  if( argc < 3 )
  {
    std::cerr
      << "Usage: " << argv[ 0 ]
      << " plugins_file input_image [widget]"
      << std::endl;
    return( 1 );

  } // fi

  // Create interface
  TInterface plugins;
  if( !plugins.Load( argv[ 1 ] ) )
  {
    std::cerr << "Failed to load plugins." << std::endl;
    return( 1 );

  } // fi

  // Create objects
  TProcessObject::Pointer reader;
  reader = plugins.CreateProcessObject( "cpPlugins::IO::ImageReader" );
  if( reader.IsNull( ) )
  {
    std::cerr
      << "No suitable reader found in plugins." << std::endl
      << "Reader: " << reader.GetPointer( ) << std::endl
      << std::endl;
    return( 1 );

  } // fi

  // Configure reader
  TParameters* reader_params = reader->GetParameters( );
  if( argc > 4 )
  {
    for( int i = 2; i < argc; ++i )
      reader_params->AddToStringList( "FileNames", argv[ i ] );
  }
  else
    reader_params->AddToStringList( "FileNames", argv[ 2 ] );

  // Execute pipeline
  std::string err = reader->Update( );
  if( err != "" )
  {
    std::cerr << "ERROR: " << err << std::endl;
    return( 1 );

  } // fi
  TImage* image = reader->GetOutput< TImage >( "Output" );

  // Configure visualization objects
  vtkSmartPointer< vtkRenderer > renderer =
    vtkSmartPointer< vtkRenderer >::New( );
  renderer->SetBackground( 0.1, 0.3, 0.5 );

  vtkSmartPointer< vtkRenderWindow > window =
    vtkSmartPointer< vtkRenderWindow >::New( );
  window->AddRenderer( renderer );
  window->SetSize( 600, 600 );

  // Set up the interaction
  vtkSmartPointer< vtkRenderWindowInteractor > interactor =
    vtkSmartPointer< vtkRenderWindowInteractor >::New( );
  window->SetInteractor( interactor );

  // Create slice actors
  vtkSmartPointer< TSliceActors > image_actors =
    vtkSmartPointer< TSliceActors >::New( );
  image_actors->AddInputData( image->GetVTK< vtkImageData >( ), 2 );
  image_actors->PushActorsInto( window );





  vtkImageData* vimage = image->GetVTK< vtkImageData >( );
  double range[ 2 ];
  vimage->GetScalarRange( range );

  vtkSmartPointer< cpExtensions::Visualization::ImageBlender > blender =
    vtkSmartPointer< cpExtensions::Visualization::ImageBlender >::New( );
  blender->AddInputData( vimage );
  blender->SetWindow( range[ 1 ] - range[ 0 ] );
  blender->SetLevel( ( range[ 1 ] + range[ 0 ] ) / double( 2 ) );
  blender->Update( );

  std::cout << blender->GetWindow( ) << " " << blender->GetLevel( ) << std::endl;

  vtkSmartPointer< vtkPNGWriter > writer =
    vtkSmartPointer< vtkPNGWriter >::New( );
  writer->SetInputConnection( blender->GetOutputPort( ) );
  writer->SetFileName( "leo_actor.png" );
  writer->Write( );

  return( 0 );


  // Activate seed widget
  if( argc == 4 )
  {
    TSliceActors::TStyle* style =
      dynamic_cast< TSliceActors::TStyle* >( image_actors->GetStyle( ) );
    if( style != NULL )
    {
      if( std::string( argv[ 3 ] ) == std::string( "seed" ) )
        style->SeedWidgetOn( );

    } // fi

  } // fi

  // Begin interaction
  image_actors->ResetCamera( );
  window->Render( );
  interactor->Start( );

  return( 0 );
}

// eof - $RCSfile$