/*
 * Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 * 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 "itkListSample.h"

#include "otbMath.h"
#include "otbImage.h"
#include "otbImageFileReader.h"
#include "otbImageFileWriter.h"

#include "otbAngularProjectionSetImageFilter.h"

int otbAngularProjectionSetImageFilterTest(int, char* argv[])
{
  const unsigned int Dimension      = 2;
  const unsigned int SpaceDimension = 3;
  const unsigned int nbInputImages  = SpaceDimension + 1;

  // Use the same input several time in this test
  std::string inputImageName = argv[1];

  // We only have one output here
  std::string outputImageName = argv[2];

  // Main type definition
  typedef float  PixelType;
  typedef double PrecisionType;
  typedef itk::FixedArray<PrecisionType, SpaceDimension> AngleType;
  typedef itk::Statistics::ListSample<AngleType> AngleListType;
  typedef otb::Image<PixelType, Dimension> ImageType;

  // Reading input images
  typedef otb::ImageFileReader<ImageType> ReaderType;
  typedef otb::ObjectList<ReaderType>     ReaderListType;
  ReaderListType::Pointer                 reader = ReaderListType::New();
  reader->Resize(nbInputImages);
  for (unsigned int i = 0; i < nbInputImages; i++)
  {
    reader->SetNthElement(i, ReaderType::New());
    reader->GetNthElement(i)->SetFileName(inputImageName);
    reader->GetNthElement(i)->Update();
  }

  // Parameter (to be changed if necessary)
  // Here, we will have one output only
  AngleListType::Pointer angleList = AngleListType::New();
  AngleType              angle;
  for (unsigned int i = 0; i < SpaceDimension; i++)
  {
    angle[i] = otb::CONST_PI / static_cast<double>(SpaceDimension);
  }
  angleList->PushBack(angle);

  // Filter
  typedef otb::AngularProjectionSetImageFilter<ImageType, ImageType, AngleListType, PrecisionType> FilterType;
  FilterType::Pointer filter = FilterType::New();
  for (unsigned int i = 0; i < nbInputImages; i++)
  {
    filter->SetInput(i, reader->GetNthElement(i)->GetOutput());
  }
  filter->SetAngleList(angleList);
  filter->Update();
  // Saving
  typedef otb::ImageFileWriter<ImageType> WriterType;
  typedef otb::ObjectList<WriterType>     WriterListType;
  WriterListType::Pointer                 writers = WriterListType::New();
  writers->Resize(filter->GetOutput()->Size());
  for (unsigned int i = 0; i < filter->GetOutput()->Size(); i++)
  {
    writers->SetNthElement(i, WriterType::New());
    WriterType::Pointer writer = writers->GetNthElement(i);
    writer->SetFileName(outputImageName);
    writer->SetInput(filter->GetOutput()->GetNthElement(i));
    writer->Update();
  }

  return EXIT_SUCCESS;
}
