/*=========================================================================
 *
 *  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 itkAdaptiveHistogramEqualizationImageFilter_hxx
#define itkAdaptiveHistogramEqualizationImageFilter_hxx

#include <map>
#include <set>
#include "itkMath.h"

#include "itkAdaptiveHistogramEqualizationImageFilter.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkConstNeighborhoodIterator.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkProgressReporter.h"
#include "itkMinimumMaximumImageFilter.h"

namespace itk
{

template< typename TImageType, typename TKernel >
void
AdaptiveHistogramEqualizationImageFilter< TImageType, TKernel >
::BeforeThreadedGenerateData()
{
  typename ImageType::Pointer input = ImageType::New();
  input->Graft( const_cast<ImageType*>(this->GetInput()) );

  // Calculate min and max gray level of an input image
  // NOTE: This computation of min/max means that this filter should
  // not be able to stream.
  using MinMaxFilter = MinimumMaximumImageFilter<ImageType>;
  typename MinMaxFilter::Pointer minmax = MinMaxFilter::New();

  minmax->SetInput( input );
  minmax->Update();

  m_InputMinimum = minmax->GetMinimum();
  m_InputMaximum = minmax->GetMaximum();

}

template< typename TImageType, typename TKernel >
void
AdaptiveHistogramEqualizationImageFilter< TImageType, TKernel >
::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << "Alpha: " << m_Alpha << std::endl;
  os << "Beta: " << m_Beta << std::endl;

  os << "InputMinimum: " << static_cast< typename NumericTraits< InputPixelType >::PrintType >( m_InputMinimum ) << std::endl;
  os << "InputMaximum: " << static_cast< typename NumericTraits< InputPixelType >::PrintType >( m_InputMaximum ) << std::endl;

  os << "UseLookupTable: " << ( m_UseLookupTable ? "On" : "Off" ) << std::endl;
}
} // end namespace

#endif
