/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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.
 *
 *=========================================================================*/

#include "itkMaskedImageToHistogramFilter.h"
#include "itkHistogramToLogProbabilityImageFilter.h"
#include "itkImage.h"
#include "itkRGBPixel.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkComposeImageFilter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkSimpleFilterWatcher.h"
#include "itkTestingMacros.h"

int
itkMaskedImageToHistogramFilterTest1(int argc, char * argv[])
{

  if (argc < 6)
  {
    std::cerr << "Missing parameters." << std::endl;
    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
    std::cerr << " inputImageFileName inputImageFileName maskImage maskValue outputHistogramFile" << std::endl;
    return EXIT_FAILURE;
  }


  using PixelComponentType = unsigned char;
  constexpr unsigned int Dimension{ 3 };
  using VectorPixelType = itk::Vector<PixelComponentType, 2>;

  using ImageType = itk::Image<unsigned char, Dimension>;
  using VectorImageType = itk::Image<VectorPixelType, Dimension>;

  using ReaderType = itk::ImageFileReader<ImageType>;
  auto reader = ReaderType::New();
  reader->SetFileName(argv[1]);

  auto reader2 = ReaderType::New();
  reader2->SetFileName(argv[2]);

  auto reader3 = ReaderType::New();
  reader3->SetFileName(argv[3]);

  using ComposeType = itk::ComposeImageFilter<ImageType, VectorImageType>;
  auto compose = ComposeType::New();
  compose->SetInput1(reader->GetOutput());
  compose->SetInput2(reader2->GetOutput());

  using HistogramFilterType = itk::Statistics::MaskedImageToHistogramFilter<VectorImageType, ImageType>;
  auto histogramFilter = HistogramFilterType::New();
  histogramFilter->SetInput(compose->GetOutput());
  histogramFilter->SetMaskImage(reader3->GetOutput());
  histogramFilter->SetMaskValue(std::stoi(argv[4]));
  itk::SimpleFilterWatcher watcher(histogramFilter, "filter");

  using HistogramType = HistogramFilterType::HistogramType;
  using SizeType = HistogramFilterType::HistogramSizeType;

  //   // Setting bin mins and max
  //   using HistogramMeasurementVectorType = HistogramFilterType::HistogramMeasurementVectorType;
  //   HistogramMeasurementVectorType histogramBinMinimum( 2 );
  //   histogramBinMinimum[0] = 0;
  //   histogramBinMinimum[1] = 0;
  //   HistogramMeasurementVectorType histogramBinMaximum( 2 );
  //   histogramBinMaximum[0] = 256;
  //   histogramBinMaximum[1] = 256;
  //   histogramFilter->SetHistogramBinMinimum( histogramBinMinimum );
  //   histogramFilter->SetHistogramBinMaximum( histogramBinMaximum );
  //   histogramFilter->SetAutoMinimumMaximum( false );

  //   SizeType size( 2 );
  //   size.Fill(256);
  //   histogramFilter->SetHistogramSize( size );

  // TODO: this Update() shouldn't be needed - remove it.
  ITK_TRY_EXPECT_NO_EXCEPTION(histogramFilter->Update());


  // use a 3D image to check the behavior of HistogramToImageFilter when the image
  // is of greater dimension than the histogram
  using FloatImageType = itk::Image<float, 3>;
  using ImageFilterType = itk::HistogramToLogProbabilityImageFilter<HistogramType, FloatImageType>;
  auto imageFilter = ImageFilterType::New();
  imageFilter->SetInput(histogramFilter->GetOutput());

  using RescaleType = itk::RescaleIntensityImageFilter<FloatImageType, ImageType>;
  auto rescale = RescaleType::New();
  rescale->SetInput(imageFilter->GetOutput());

  using WriterType = itk::ImageFileWriter<ImageType>;
  auto writer = WriterType::New();
  writer->SetInput(rescale->GetOutput());
  writer->SetFileName(argv[5]);

  ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());


  // print the image produced by HistogramToLogProbabilityImageFilter for visual inspection
  imageFilter->GetOutput()->Print(std::cout);


  std::cout << "Test finished." << std::endl;
  return EXIT_SUCCESS;
}
