/*=========================================================================
 *
 *  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 itkLevelSetImage_h
#define itkLevelSetImage_h

#include "itkLevelSetBase.h"
#include "itkObjectFactory.h"
#include "itkIndex.h"
#include "itkImageBase.h"

namespace itk
{
/**
 *  \class LevelSetImage
 *  \brief Abstract class for a level-set function on one Image.
 *
 *  \tparam TOutput OutputType of the level-set function value
 *  \tparam VDimension Dimension of the underlying Image.
 *
 *  \ingroup ITKLevelSetsv4
 */
template< typename TInput, unsigned int VDimension, typename TOutput >
class ITK_TEMPLATE_EXPORT LevelSetImage :
  public LevelSetBase< TInput, VDimension, TOutput, ImageBase< VDimension > >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(LevelSetImage);

  using ImageBaseType = ImageBase< VDimension >;

  using Self = LevelSetImage;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;
  using Superclass = LevelSetBase< TInput, VDimension, TOutput, ImageBaseType >;

  /** Run-time type information */
  itkTypeMacro ( LevelSetImage, LevelSetBase );

  static constexpr unsigned int Dimension = Superclass::Dimension;

  using InputType = typename Superclass::InputType;
  using OutputType = typename Superclass::OutputType;
  using OutputRealType = typename Superclass::OutputRealType;
  using GradientType = typename Superclass::GradientType;
  using HessianType = typename Superclass::HessianType;
  using LevelSetDataType = typename Superclass::LevelSetDataType;
  using OffsetType = typename ImageBaseType::OffsetType;
  using OffsetValueType = typename ImageBaseType::OffsetValueType;

  /* Set/Get the domain offset from input domain */
  itkSetMacro( DomainOffset, OffsetType );
  itkGetConstMacro( DomainOffset, OffsetType );

protected:
  LevelSetImage();

  ~LevelSetImage() override = default;

  using ScalingType = GradientType;
  ScalingType m_NeighborhoodScales;
  OffsetType  m_DomainOffset;

  virtual bool IsInsideDomain( const InputType& iP ) const = 0;

private:

};

} // end namespace itk

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

#endif // itkLevelSetImage_h
