/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkNeighborhoodBinaryThresholdImageFunction_h
#define itkNeighborhoodBinaryThresholdImageFunction_h

#include "itkBinaryThresholdImageFunction.h"

namespace itk
{
/**
 * \class NeighborhoodBinaryThresholdImageFunction
 * \brief Determine whether all the pixels in the specified neighborhood meet a threshold criteria
 *
 * Determine whether all the pixels in the specified neighborhood meet
 * a threshold criteria.
 *
 * If called with a ContinuousIndex or Point, the calculation is performed
 * at the nearest neighbor.
 *
 * This class is templated over the input image type and the coordinate
 * representation type (e.g. float or double).
 *
 * \ingroup ImageFunctions
 * \ingroup ITKImageFunction
 */
template< typename TInputImage, typename TCoordRep = float >
class ITK_TEMPLATE_EXPORT NeighborhoodBinaryThresholdImageFunction:
  public BinaryThresholdImageFunction< TInputImage, TCoordRep >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(NeighborhoodBinaryThresholdImageFunction);

  /** Standard class type aliases. */
  using Self = NeighborhoodBinaryThresholdImageFunction;
  using Superclass = BinaryThresholdImageFunction< TInputImage, TCoordRep >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  /** Run-time type information (and related methods). */
  itkTypeMacro(NeighborhoodBinaryThresholdImageFunction, BinaryThresholdImageFunction);

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** InputImageType type alias support */
  using InputImageType = TInputImage;

  /** OutputType typdef support. */
  using OutputType = typename Superclass::OutputType;

  /** Index type alias support */
  using IndexType = typename Superclass::IndexType;

  /** ContinuousIndex type alias support */
  using ContinuousIndexType = typename Superclass::ContinuousIndexType;

  /** Point type alias support */
  using PointType = typename Superclass::PointType;

  /** PixelType type alias support */
  using PixelType = typename Superclass::PixelType;

  /** Dimension of the underlying image. */
  static constexpr unsigned int ImageDimension = InputImageType::ImageDimension;

  /** SizeType of the input image */
  using InputSizeType = typename InputImageType::SizeType;

  /** Set the radius of the neighborhood used in computation. */
  itkSetMacro(Radius, InputSizeType);

  /** Get the radius of the neighborhood used in computation */
  itkGetConstReferenceMacro(Radius, InputSizeType);

  /** Evalulate the function at specified index */
  bool EvaluateAtIndex(const IndexType & index) const override;

  /** Evaluate the function at non-integer positions */
  bool Evaluate(const PointType & point) const override
  {
    IndexType index;

    this->ConvertPointToNearestIndex(point, index);
    return this->EvaluateAtIndex(index);
  }

  bool EvaluateAtContinuousIndex(
    const ContinuousIndexType & cindex) const override
  {
    IndexType index;

    this->ConvertContinuousIndexToNearestIndex(cindex, index);
    return this->EvaluateAtIndex(index);
  }

protected:
  NeighborhoodBinaryThresholdImageFunction();
  ~NeighborhoodBinaryThresholdImageFunction() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

private:
  InputSizeType m_Radius;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkNeighborhoodBinaryThresholdImageFunction.hxx"
#endif

/*
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkNeighborhoodBinaryThresholdImageFunction.hxx"
#endif
*/

#endif
