#include "BaseFunctions.h"
#include <itkImage.h>
#include <fpa/Image/SkeletonFilter.h>
#include <fpa/Image/SkeletonWriter.h>

// -------------------------------------------------------------------------
const unsigned int Dim = 2;
typedef short TPixel;

typedef itk::Image< TPixel, Dim >                 TInputImage;
typedef fpa::Image::SkeletonFilter< TInputImage > TFilter;

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

  } // fi
  std::string input_image_filename = argv[ 1 ];
  std::string output_skeleton_filename = argv[ 2 ];

  // Read image
  TInputImage::Pointer image;
  std::string err1 = fpa::tests::image::Read( image, input_image_filename );
  if( err1 != "" )
  {
    std::cerr << "Error caught: " << err1 << std::endl;
    return( 1 );

  } // fi

  // Prepare filter
  TFilter::Pointer filter = TFilter::New( );
  filter->SetInput( image );

  // Configure seed
  if( argc == 6 )
  {
    TInputImage::PointType pnt;
    pnt[ 0 ] = std::atof( argv[ 3 ] );
    pnt[ 1 ] = std::atof( argv[ 4 ] );
    pnt[ 2 ] = std::atof( argv[ 5 ] );

    TInputImage::IndexType seed;
    image->TransformPhysicalPointToIndex( pnt, seed );

    filter->SeedFromMaximumDistanceOff( );
    filter->SetSeed( seed );
  }
  else
    filter->SeedFromMaximumDistanceOn( );

  // Configure distance map
  filter->GetDistanceMap( )->InsideIsPositiveOn( );
  filter->GetDistanceMap( )->SquaredDistanceOff( );
  filter->GetDistanceMap( )->UseImageSpacingOn( );

  // Update
  filter->Update( );

  // Save results
  fpa::Image::SkeletonWriter< TFilter::TSkeleton >::Pointer writer =
    fpa::Image::SkeletonWriter< TFilter::TSkeleton >::New( );
  writer->SetInput( filter->GetOutput( ) );
  writer->SetFileName( output_skeleton_filename );
  try
  {
    writer->Update( );
  }
  catch( std::exception& err )
  {
    std::cerr << "Error caught: " << err.what( ) << std::endl;
    return( 1 );

  } // yrt
  return( 0 );
}

// eof - $RCSfile$