/*=========================================================================
  Program:   vv                     http://www.creatis.insa-lyon.fr/rio/vv

  Authors belong to:
  - University of LYON              http://www.universite-lyon.fr/
  - Léon Bérard cancer center       http://www.centreleonberard.fr
  - CREATIS CNRS laboratory         http://www.creatis.insa-lyon.fr

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the copyright notices for more information.

  It is distributed under dual licence

  - BSD        See included LICENSE.txt file
  - CeCILL-B   http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
===========================================================================**/
/**
 -------------------------------------------------------------------
 * @file   clitkSplitImageGenericFilter.cxx
 * @author Joël Schaerer
 * @date   20 April 2009

 * @brief
 -------------------------------------------------------------------*/

#include "clitkSplitImageGenericFilter.h"
#include <itkIntensityWindowingImageFilter.h>
//--------------------------------------------------------------------
clitk::SplitImageGenericFilter::SplitImageGenericFilter():
  clitk::ImageToImageGenericFilter<Self>("SplitImage")
{
  mSplitDimension = 0;
  InitializeImageType<3>();
  InitializeImageType<4>();
}
//--------------------------------------------------------------------


//--------------------------------------------------------------------
template<unsigned int Dim>
void clitk::SplitImageGenericFilter::InitializeImageType()
{
  ADD_DEFAULT_IMAGE_TYPES(Dim);
  //ADD_VEC_IMAGE_TYPE(Dim, 3,float);
}
//--------------------------------------------------------------------

//--------------------------------------------------------------------
template<class ImageType>
void clitk::SplitImageGenericFilter::UpdateWithInputImageType()
{

  // Read input
  typedef typename ImageType::PixelType PixelType;
  typedef itk::Image<PixelType,ImageType::ImageDimension-1> OutputImageType;
  typename ImageType::Pointer input = this->GetInput<ImageType>(0);
  typedef itk::ExtractImageFilter<ImageType,OutputImageType> FilterType;
  typename FilterType::Pointer filter= FilterType::New();

  filter->SetInput(input);
  typename ImageType::SizeType size=input->GetLargestPossibleRegion().GetSize();
  size[mSplitDimension]=0;
  typename ImageType::RegionType extracted_region;
  extracted_region.SetSize(size);
#if ITK_VERSION_MAJOR >= 4
  filter->SetDirectionCollapseToSubmatrix();
#endif
  filter->SetExtractionRegion(extracted_region);
  filter->Update();

  typename ImageType::IndexType index=input->GetLargestPossibleRegion().GetIndex();
  std::string base_filename=GetOutputFilename();
  unsigned int number_of_output_images=input->GetLargestPossibleRegion().GetSize()[mSplitDimension];
  for (unsigned int i=0; i<number_of_output_images; i++) {
    std::ostringstream ss;
    ss << std::setfill('0') << std::setw((int)(log10(double(number_of_output_images))+1)) << i;
    index[mSplitDimension]=i;
    extracted_region.SetIndex(index);
    filter->SetExtractionRegion(extracted_region);
    filter->Update();
    if(this->m_Png){
      typedef itk::Image< unsigned char, ImageType::ImageDimension-1 > OutputPngImageType;
      typedef itk::IntensityWindowingImageFilter< OutputImageType, OutputPngImageType > CastFilterType;
      typename CastFilterType::Pointer cast = CastFilterType::New();
      cast->SetWindowLevel(this->m_Window, this->m_Level);
      cast->SetInput(filter->GetOutput());
      SetOutputFilename(base_filename+"_"+ss.str()+".png");
      SetNextOutput<OutputPngImageType>(cast->GetOutput());
    }
    else {
      SetOutputFilename(base_filename+"_"+ss.str()+".mhd");
      SetNextOutput<OutputImageType>(filter->GetOutput());
    }
  }
}
//--------------------------------------------------------------------