/*=========================================================================
 *
 *  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 "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkSimpleFilterWatcher.h"

#include "itkAdditiveGaussianNoiseImageFilter.h"
#include "itkTestingMacros.h"

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

  if (argc < 3)
  {
    std::cerr << "usage: " << itkNameOfTestExecutableMacro(argv) << " input output [std_dev [mean]]" << std::endl;
    return EXIT_FAILURE;
  }

  constexpr unsigned int Dimension = 2;

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

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

  using AdditiveGaussianNoiseFilterType = itk::AdditiveGaussianNoiseImageFilter<ImageType, ImageType>;

  auto additiveGaussianNoiseFilter = AdditiveGaussianNoiseFilterType::New();

  ITK_EXERCISE_BASIC_OBJECT_METHODS(
    additiveGaussianNoiseFilter, AdditiveGaussianNoiseImageFilter, NoiseBaseImageFilter);

  double stdDev = 1.0;
  if (argc >= 4)
  {
    stdDev = std::stod(argv[3]);
  }
  additiveGaussianNoiseFilter->SetStandardDeviation(stdDev);
  ITK_TEST_SET_GET_VALUE(stdDev, additiveGaussianNoiseFilter->GetStandardDeviation());

  double mean = 0.0;
  if (argc >= 5)
  {
    mean = std::stod(argv[4]);
  }
  additiveGaussianNoiseFilter->SetMean(mean);
  ITK_TEST_SET_GET_VALUE(mean, additiveGaussianNoiseFilter->GetMean());

  additiveGaussianNoiseFilter->SetInput(reader->GetOutput());

  itk::SimpleFilterWatcher watcher(additiveGaussianNoiseFilter, "AdditiveGaussianNoiseImageFilter");

  using WriterType = itk::ImageFileWriter<ImageType>;
  auto writer = WriterType::New();
  writer->SetInput(additiveGaussianNoiseFilter->GetOutput());
  writer->SetFileName(argv[2]);

  ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());

  return EXIT_SUCCESS;
}
