#ifndef __fpa__Image__MoriFilterHelper__h__
#define __fpa__Image__MoriFilterHelper__h__

#include <utility>
#include <vector>
#include <fpa/Image/RegionGrow.h>
#include <fpa/Image/Functors/RegionGrow/BinaryThreshold.h>

namespace fpa
{
  namespace Image
  {
    /**
     */
    template< class _TInputImage, class _TOutputImage >
    class MoriFilterHelper
      : public fpa::Image::RegionGrow< _TInputImage, _TOutputImage >
    {
    public:
      typedef MoriFilterHelper                                        Self;
      typedef fpa::Image::RegionGrow< _TInputImage, _TOutputImage > Superclass;
      typedef itk::SmartPointer< Self >                             Pointer;
      typedef itk::SmartPointer< const Self >                       ConstPointer;

      typedef typename Superclass::TOutput       TOutput;
      typedef typename Superclass::TVertex       TVertex;
      typedef typename Superclass::TGrowFunction TGrowFunction;
      typedef typename _TInputImage::PixelType   TPixel;
      typedef fpa::Image::Functors::RegionGrow::BinaryThreshold< _TInputImage, TOutput > TBinThresholdFunction;

    protected:
      typedef typename Superclass::_TQueueNode _TQueueNode;
      typedef typename Superclass::_TQueue     _TQueue;

      typedef std::pair< TPixel, unsigned long > TCurveData;
      typedef std::vector< TCurveData >          TCurve;

    public:
      itkNewMacro( Self );
      itkTypeMacro( fpa::Image::MoriFilterHelper, fpa::Image::RegionGrow );

      itkGetConstMacro( Lower, TPixel );
      itkGetConstMacro( Upper, TPixel );
      itkGetConstMacro( Step, TPixel );
      itkGetConstMacro( OptimumThreshold, typename _TOutputImage::PixelType );

      itkSetMacro( Lower, TPixel );
      itkSetMacro( Upper, TPixel );
      itkSetMacro( Step, TPixel );


    protected:
      MoriFilterHelper( );
      virtual ~MoriFilterHelper( );

      virtual bool _ContinueGenerateData( ) override;
      virtual void _BeforeGenerateData( ) override;
      virtual void _AfterGenerateData( ) override;
      virtual void _BeforeLoop( ) override;
      virtual void _AfterLoop( ) override;
      virtual bool _UpdateValue( _TQueueNode& v, const _TQueueNode& p ) override;
      virtual void _UpdateResult( const _TQueueNode& n ) override;

    private:
      // Purposely not defined
      MoriFilterHelper( const Self& other );
      Self& operator=( const Self& other );

    protected:
      TPixel m_Lower;
      TPixel m_Upper;
      TPixel m_Step;
      typename _TOutputImage::PixelType m_OptimumThreshold;

      _TQueue m_NextQueue;
      unsigned long m_ActualCount;
      TCurve m_Curve;
    };

  } // ecapseman

} // ecapseman

#ifndef ITK_MANUAL_INSTANTIATION
#  include <fpa/Image/MoriFilterHelper.hxx>
#endif // ITK_MANUAL_INSTANTIATION

#endif // __fpa__Image__MoriFilterHelper__h__

// eof - $RCSfile$