#include <itkCommand.h>
#include <itkImage.h>
#include <itkImageFileReader.h>
#include <itkImageFileWriter.h>
#include <fpa/Image/MoriRegionGrow.h>

// -------------------------------------------------------------------------
typedef itk::Image< unsigned char, 2 >               TImage;
typedef itk::ImageFileReader< TImage >               TReader;
typedef itk::ImageFileWriter< TImage >               TWriter;
typedef fpa::Image::MoriRegionGrow< TImage, TImage > TFilter;

// -------------------------------------------------------------------------
/**
 */
class MyObserver
  : public itk::Command
{
public:
  typedef TFilter::TStartEvent     TStartEvent;
  typedef TFilter::TEndEvent       TEndEvent;
  typedef TFilter::TStartLoopEvent TStartLoopEvent;
  typedef TFilter::TEndLoopEvent   TEndLoopEvent;
  typedef TFilter::TPushEvent      TPushEvent;
  typedef TFilter::TPopEvent       TPopEvent;
  typedef TFilter::TMarkEvent      TMarkEvent;

public:
  itkNewMacro( MyObserver );

public:
  virtual void Execute(
    itk::Object* caller, const itk::EventObject& event
    ) override
    {
      this->Execute( const_cast< const itk::Object* >( caller ), event );
    }
  virtual void Execute(
    const itk::Object* object, const itk::EventObject& event
    ) override
    {
      /* TODO
         if( TStartEvent( ).CheckEvent( &event ) )
         std::cout << "Start" << std::endl;
         else if( TEndEvent( ).CheckEvent( &event ) )
         std::cout << "End" << std::endl;
         else if( TStartLoopEvent( ).CheckEvent( &event ) )
         std::cout << "StartLoop" << std::endl;
         else if( TEndLoopEvent( ).CheckEvent( &event ) )
         std::cout << "EndLoop" << std::endl;
         else if( TMarkEvent( ).CheckEvent( &event ) )
         {
         const TMarkEvent* mark = dynamic_cast< const TMarkEvent* >( &event );
         std::cout << "Mark: " << mark->Vertex << std::endl;

         } // fi
      */
      /* TODO
         TPushEvent;
         TPopEvent;
      */
    }
};

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

  } // fi
  std::string in_fname = argv[ 1 ];
  std::string out_fname = argv[ 2 ];
  int seed_x = 111;
  int seed_y = 91;

  TReader::Pointer reader = TReader::New( );
  reader->SetFileName( in_fname );

  TImage::IndexType seed;
  seed[ 0 ] = seed_x;
  seed[ 1 ] = seed_y;

  TFilter::Pointer filter = TFilter::New( );
  filter->SetInput( reader->GetOutput( ) );
  filter->SetLower( 0 );
  filter->SetUpper( 255 );
  filter->SetStep( 1 );
  filter->SetInsideValue( 255 );
  filter->SetOutsideValue( 0 );
  filter->AddSeed( seed, filter->GetInsideValue( ) );

  /* TODO
     MyObserver::Pointer obs = MyObserver::New( );
     filter->AddObserver( itk::AnyEvent( ), obs );
  */

  TWriter::Pointer writer = TWriter::New( );
  writer->SetInput( filter->GetOutput( ) );
  writer->SetFileName( out_fname );
  writer->Update( );

  return( 0 );
}

// eof - $RCSfile$