/*=========================================================================
 *
 *  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 <fstream>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkMetaDataObject.h"
#include "itkMetaImageIO.h"
#include "itkTestingHashImageFilter.h"
#include "itkTestingMacros.h"

// Specific ImageIO test

namespace
{

int
TestUnknowMetaDataBug(const std::string & fname)
{
  std::cout << "Testing for unknown meta data entry bug." << std::endl;

  try
  {
    using PixelType = unsigned short;
    using ImageType = itk::Image<PixelType, 2>;

    ImageType::RegionType region;
    ImageType::SizeType   size = { { 32, 32 } };
    region.SetSize(size);

    auto image = ImageType::New();
    image->SetRegions(region);
    image->Allocate();
    image->FillBuffer(0);

    itk::MetaDataDictionary & dict = image->GetMetaDataDictionary();

    itk::EncapsulateMetaData<float>(dict, "ASimpleFloatInitalized", static_cast<float>(1.234560F));
    itk::EncapsulateMetaData<std::complex<float>>(
      dict, "AnUnsuportedComplexInitalized", std::complex<float>(1.234560F));

    using Hasher = itk::Testing::HashImageFilter<ImageType>;
    auto hasher = Hasher::New();
    hasher->SetInput(image);
    hasher->InPlaceOff();
    hasher->Update();

    std::string originalHash = hasher->GetHash();
    std::cout << "\tOriginal image hash: " << originalHash << std::endl;


    // Write image out
    itk::ImageFileWriter<ImageType>::Pointer writer;
    writer = itk::ImageFileWriter<ImageType>::New();
    writer->SetInput(image);
    writer->SetFileName(fname);
    writer->Update();

    itk::ImageFileReader<ImageType>::Pointer reader;
    reader = itk::ImageFileReader<ImageType>::New();
    reader->SetFileName(fname);

    hasher->SetInput(reader->GetOutput());
    hasher->Update();

    std::string readHash = hasher->GetHash();
    std::cout << "\tRead hash: " << readHash << std::endl;

    ITK_TEST_EXPECT_EQUAL(originalHash, readHash);
  }
  catch (const std::exception & e)
  {
    std::cerr << "Exception: " << e.what() << std::endl;
    return EXIT_FAILURE;
  }
  return EXIT_SUCCESS;
}

} // namespace

int
itkMetaImageIOTest2(int argc, char * argv[])
{
  if (argc < 2)
  {
    std::cerr << "Missing Parameters." << std::endl;
    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " outputFileName" << std::endl;
    return EXIT_FAILURE;
  }

  const bool pass = (TestUnknowMetaDataBug(argv[1]) == EXIT_SUCCESS);
  return (pass ? EXIT_SUCCESS : EXIT_FAILURE);
}