/*=========================================================================
 *
 *  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 "itkCSVNumericObjectFileWriter.h"
#include "itkLightProcessObject.h"
#include "itkTestingMacros.h"

int
itkCSVNumericObjectFileWriterTest(int argc, char * argv[])
{
  if (argc < 2)
  {
    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " Filename" << std::endl;
    return EXIT_FAILURE;
  }

  constexpr double       nan{ std::numeric_limits<double>::quiet_NaN() };
  constexpr unsigned int ARows{ 3 };
  constexpr unsigned int ACols{ 6 };

  using ArrayType = itk::Array2D<double>;
  ArrayType array(ARows, ACols);
  array[0][0] = nan;
  array[0][1] = 1e+09;
  array[0][2] = 5;
  array[0][3] = 9;
  array[0][4] = 6.1;
  array[0][5] = nan;
  array[1][0] = 99;
  array[1][1] = 0;
  array[1][2] = 3.75;
  array[1][3] = 0.008;
  array[1][4] = nan;
  array[1][5] = nan;
  array[2][0] = 1;
  array[2][1] = 24.22231242343532;
  array[2][2] = 9;
  array[2][3] = 5.6;
  array[2][4] = nan;
  array[2][5] = 3e+10;

  using Array2DWriterType = itk::CSVNumericObjectFileWriter<double, ARows, ACols>;
  auto array_writer = Array2DWriterType::New();

  ITK_EXERCISE_BASIC_OBJECT_METHODS(array_writer, CSVNumericObjectFileWriter, LightProcessObject);


  constexpr char delimiterCharacter{ ',' };
  array_writer->SetFieldDelimiterCharacter(delimiterCharacter);

  // should throw an exception as there is no input file nor any object
  // to write out
  bool caught = false;
  try
  {
    array_writer->Update();
  }
  catch (const itk::ExceptionObject & exp)
  {
    caught = true;
    std::cerr << "Exception caught!" << std::endl;
    std::cerr << "This is an expected exception as there is no input file provided." << std::endl;
    std::cerr << exp << std::endl;
  }
  if (!caught)
  {
    std::cerr << "An exception should have been caught here as there is no input file provided. Test fails."
              << std::endl;
    return EXIT_FAILURE;
  }

  const std::string filename = argv[1];
  array_writer->SetFileName(filename);

  // should throw an exception as there is no input object
  caught = false;
  try
  {
    array_writer->Update();
  }
  catch (const itk::ExceptionObject & exp)
  {
    caught = true;
    std::cerr << "Exception caught!" << std::endl;
    std::cerr << "This is an expected exception as there is no"
              << " object to write out." << std::endl;
    std::cerr << exp << std::endl;
  }
  if (!caught)
  {
    std::cerr << "An exception should have been caught here as there is no input object to write out. Test fails."
              << std::endl;
    return EXIT_FAILURE;
  }

  array_writer->SetInput(&array);

  // write out the Array2D object
  try
  {
    array_writer->Update();
  }
  catch (const itk::ExceptionObject & exp)
  {
    std::cerr << "Exception caught!" << std::endl;
    std::cerr << exp << std::endl;
    return EXIT_FAILURE;
  }

  constexpr unsigned int VMRows{ 3 };
  constexpr unsigned int VMCols{ 4 };

  using vnlMatrixType = vnl_matrix<double>;
  vnlMatrixType vnlmatrix(VMRows, VMCols);
  vnlmatrix[0][0] = nan;
  vnlmatrix[0][1] = 1e+09;
  vnlmatrix[0][2] = 5;
  vnlmatrix[0][3] = 9;
  vnlmatrix[1][0] = 99;
  vnlmatrix[1][1] = 0;
  vnlmatrix[1][2] = 3.75;
  vnlmatrix[1][3] = 0.008;
  vnlmatrix[2][0] = 1;
  vnlmatrix[2][1] = 2.2;
  vnlmatrix[2][2] = 9;
  vnlmatrix[2][3] = 5.6;

  using vnlMatrixWriterType = itk::CSVNumericObjectFileWriter<double, VMRows, VMCols>;
  auto vnl_matrix_writer = vnlMatrixWriterType::New();

  vnl_matrix_writer->SetFileName(filename);
  vnl_matrix_writer->SetInput(&vnlmatrix);
  vnl_matrix_writer->ColumnHeadersPushBack("vnlMatrixObject");
  vnl_matrix_writer->ColumnHeadersPushBack("Col1");
  vnl_matrix_writer->ColumnHeadersPushBack("Col2");
  vnl_matrix_writer->ColumnHeadersPushBack("Col3");
  vnl_matrix_writer->ColumnHeadersPushBack("Col4");
  vnl_matrix_writer->RowHeadersPushBack("Row1");
  vnl_matrix_writer->RowHeadersPushBack("Row2");

  // write out the vnl_matrix object
  try
  {
    vnl_matrix_writer->Update();
  }
  catch (const itk::ExceptionObject & exp)
  {
    std::cerr << "Exception caught!" << std::endl;
    std::cerr << exp << std::endl;
    return EXIT_FAILURE;
  }

  constexpr unsigned int VRows{ 3 };
  constexpr unsigned int VColumns{ 3 };

  using fixedMatrixType = itk::Matrix<double, VRows, VColumns>;
  fixedMatrixType fixedmatrix;
  fixedmatrix[0][0] = nan;
  fixedmatrix[0][1] = 1e+09;
  fixedmatrix[0][2] = 5;
  fixedmatrix[1][0] = 99;
  fixedmatrix[1][1] = 0;
  fixedmatrix[1][2] = 3.75;
  fixedmatrix[2][0] = 1;
  fixedmatrix[2][1] = 2.2;
  fixedmatrix[2][2] = 9;

  std::vector<std::string> ColumnHeaders;
  std::vector<std::string> RowHeaders;
  ColumnHeaders.emplace_back("itkMatrixObject");
  ColumnHeaders.emplace_back("Col1");
  ColumnHeaders.emplace_back("Col2");
  ColumnHeaders.emplace_back("Col3");
  RowHeaders.emplace_back("Row1");
  RowHeaders.emplace_back("Row2");
  RowHeaders.emplace_back("Row3");

  using fixedMatrixWriterType = itk::CSVNumericObjectFileWriter<double, VRows, VColumns>;
  auto fixed_matrix_writer = fixedMatrixWriterType::New();

  fixed_matrix_writer->SetFileName(filename);
  fixed_matrix_writer->SetInput(&fixedmatrix);
  fixed_matrix_writer->SetColumnHeaders(ColumnHeaders);
  fixed_matrix_writer->SetRowHeaders(RowHeaders);

  // write out the itkMatrix object
  try
  {
    fixed_matrix_writer->Update();
  }
  catch (const itk::ExceptionObject & exp)
  {
    std::cerr << "Exception caught!" << std::endl;
    std::cerr << exp << std::endl;
    return EXIT_FAILURE;
  }

  return EXIT_SUCCESS;
}
