/*=========================================================================
 *
 *  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 itkImageToImageMetricv4GetValueAndDerivativeThreader_h
#define itkImageToImageMetricv4GetValueAndDerivativeThreader_h

#include "itkImageToImageMetricv4GetValueAndDerivativeThreaderBase.h"
#include "itkNumericTraits.h"
#include "itkThreadedImageRegionPartitioner.h"
#include "itkThreadedIndexedContainerPartitioner.h"

namespace itk
{

/** \class ImageToImageMetricv4GetValueAndDerivativeThreader
 * \brief Provides threading for ImageToImageMetricv4::GetValueAndDerivative.
 *
 * \tparam TDomainPartitioner type of the Domain,
 * ThreadedImageRegionPartitioner or ThreadedIndexedContainerPartitioner
 * \tparam TImageToImageMetricv4 type of the ImageToImageMetricv4
 *
 * This class implements ThreadedExecution.  Template specialization is
 * provided for ThreadedImageRegionPartitioner and
 * ThreadedIndexedContainerPartitioner.
 *
 * \sa ImageToImageMetricv4GetValueAndDerivativeThreaderBase
 * \ingroup ITKMetricsv4
 * */
template < typename TDomainPartitioner, typename TImageToImageMetricv4 >
class ITK_TEMPLATE_EXPORT ImageToImageMetricv4GetValueAndDerivativeThreader
{};

/** \class ImageToImageMetricv4GetValueAndDerivativeThreader
 * \brief Specialization for ThreadedImageRegionPartitioner.
 * \ingroup ITKMetricsv4
 * */
template < typename TImageToImageMetricv4 >
class ITK_TEMPLATE_EXPORT ImageToImageMetricv4GetValueAndDerivativeThreader< ThreadedImageRegionPartitioner< TImageToImageMetricv4::VirtualImageDimension >, TImageToImageMetricv4 >
  : public ImageToImageMetricv4GetValueAndDerivativeThreaderBase< ThreadedImageRegionPartitioner< TImageToImageMetricv4::VirtualImageDimension >, TImageToImageMetricv4 >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ImageToImageMetricv4GetValueAndDerivativeThreader);

  /** Standard class type aliases. */
  using Self = ImageToImageMetricv4GetValueAndDerivativeThreader;
  using Superclass =
      ImageToImageMetricv4GetValueAndDerivativeThreaderBase< ThreadedImageRegionPartitioner< TImageToImageMetricv4::VirtualImageDimension >, TImageToImageMetricv4 >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkTypeMacro( ImageToImageMetricv4GetValueAndDerivativeThreader, ImageToImageMetricv4GetValueAndDerivativeThreaderBase );

  /** Superclass types. */
  using DomainType = typename Superclass::DomainType;
  using AssociateType = typename Superclass::AssociateType;

  /** Types of the target class. */
  using ImageToImageMetricv4Type = TImageToImageMetricv4;
  using VirtualImageType = typename Superclass::VirtualImageType;
  using VirtualIndexType = typename Superclass::VirtualIndexType;
  using VirtualPointType = typename Superclass::VirtualPointType;
  using FixedImagePointType = typename Superclass::FixedImagePointType;
  using FixedImagePixelType = typename Superclass::FixedImagePixelType;
  using FixedImageGradientType = typename Superclass::FixedImageGradientType;
  using MovingImagePointType = typename Superclass::MovingImagePointType;
  using MovingImagePixelType = typename Superclass::MovingImagePixelType;
  using MovingImageGradientType = typename Superclass::MovingImageGradientType;

  using FixedTransformType = typename Superclass::FixedTransformType;
  using FixedOutputPointType = typename Superclass::FixedOutputPointType;
  using MovingTransformType = typename Superclass::MovingTransformType;
  using MovingOutputPointType = typename Superclass::MovingOutputPointType;

  using MeasureType = typename Superclass::MeasureType;
  using DerivativeType = typename Superclass::DerivativeType;
  using DerivativeValueType = typename Superclass::DerivativeValueType;
  using JacobianType = typename Superclass::JacobianType;

  using InternalComputationValueType = typename Superclass::InternalComputationValueType;
  using NumberOfParametersType = typename Superclass::NumberOfParametersType;
  using ImageDimensionType = typename Superclass::ImageDimensionType;

protected:
  /** Constructor. */
  ImageToImageMetricv4GetValueAndDerivativeThreader() = default;

  /** Walk through the given virtual image domain, and call \c ProcessVirtualPoint on every
   * point. */
  void ThreadedExecution( const DomainType & subdomain,
                                  const ThreadIdType threadId ) override;

  /** Get cached values for efficiency. Only valid once threading has started.
   *  These methods should be used in tight loops (inlining helps measurably).
   *  Put these methods here so derived threaders can access them directly. */
  inline NumberOfParametersType GetCachedNumberOfParameters() const
  {
    return this->m_CachedNumberOfParameters;
  }
  inline NumberOfParametersType GetCachedNumberOfLocalParameters() const
  {
    return this->m_CachedNumberOfLocalParameters;
  }
};

/** \class ImageToImageMetricv4GetValueAndDerivativeThreader
 * \brief Specialization for ThreadedIndexedContainerPartitioner.
 * \ingroup ITKMetricsv4
 * */
template < typename TImageToImageMetricv4 >
class ITK_TEMPLATE_EXPORT ImageToImageMetricv4GetValueAndDerivativeThreader< ThreadedIndexedContainerPartitioner, TImageToImageMetricv4 >
  : public ImageToImageMetricv4GetValueAndDerivativeThreaderBase< ThreadedIndexedContainerPartitioner, TImageToImageMetricv4 >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ImageToImageMetricv4GetValueAndDerivativeThreader);

  /** Standard class type aliases. */
  using Self = ImageToImageMetricv4GetValueAndDerivativeThreader;
  using Superclass =
      ImageToImageMetricv4GetValueAndDerivativeThreaderBase< ThreadedIndexedContainerPartitioner, TImageToImageMetricv4 >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkTypeMacro( ImageToImageMetricv4GetValueAndDerivativeThreader, ImageToImageMetricv4GetValueAndDerivativeThreaderBase );

  /** Superclass types. */
  using DomainType = typename Superclass::DomainType;
  using AssociateType = typename Superclass::AssociateType;

  /** Types of the target class. */
  using ImageToImageMetricv4Type = typename Superclass::ImageToImageMetricv4Type;
  using VirtualImageType = typename Superclass::VirtualImageType;
  using VirtualIndexType = typename Superclass::VirtualIndexType;
  using VirtualPointType = typename Superclass::VirtualPointType;
  using FixedImagePointType = typename Superclass::FixedImagePointType;
  using FixedImagePixelType = typename Superclass::FixedImagePixelType;
  using FixedImageGradientType = typename Superclass::FixedImageGradientType;
  using MovingImagePointType = typename Superclass::MovingImagePointType;
  using MovingImagePixelType = typename Superclass::MovingImagePixelType;
  using MovingImageGradientType = typename Superclass::MovingImageGradientType;

  using FixedTransformType = typename Superclass::FixedTransformType;
  using FixedOutputPointType = typename Superclass::FixedOutputPointType;
  using MovingTransformType = typename Superclass::MovingTransformType;
  using MovingOutputPointType = typename Superclass::MovingOutputPointType;

  using MeasureType = typename Superclass::MeasureType;
  using DerivativeType = typename Superclass::DerivativeType;
  using DerivativeValueType = typename Superclass::DerivativeValueType;
  using JacobianType = typename Superclass::JacobianType;

  using InternalComputationValueType = typename Superclass::InternalComputationValueType;
  using NumberOfParametersType = typename Superclass::NumberOfParametersType;

protected:
  /** Constructor. */
  ImageToImageMetricv4GetValueAndDerivativeThreader() = default;

  /** Walk through the given virtual image domain, and call \c ProcessVirtualPoint on every
   * point. */
  void ThreadedExecution( const DomainType & subdomain,
                                  const ThreadIdType threadId ) override;

  /** Get cached values for efficiency. Only valid once threading has started.
   *  These methods should be used in tight loops (inlining helps measurably).
   *  Put these methods here so derived threaders can access them directly. */
  inline NumberOfParametersType GetCachedNumberOfParameters() const
  {
    return this->m_CachedNumberOfParameters;
  }
  inline NumberOfParametersType GetCachedNumberOfLocalParameters() const
  {
    return this->m_CachedNumberOfLocalParameters;
  }
};

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageToImageMetricv4GetValueAndDerivativeThreader.hxx"
#endif

#endif
