/*=========================================================================
 *
 *  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 <iostream>
#include "itkSimpleFilterWatcher.h"
#include "itkUnaryFunctorImageFilter.h"

namespace itk
{
namespace Function
{
template <typename TInput, typename TOutput>
class TanHelper
{
public:
  TanHelper() = default;
  ~TanHelper() = default;
  bool
  operator==(const TanHelper & rhs) const
  {
    return this == &rhs;
  }

  ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(TanHelper);

  inline TOutput
  operator()(const TInput & A) const
  {
    return (TOutput)std::tan(static_cast<double>(A));
  }
};
} // namespace Function

template <typename TInputImage, typename TOutputImage>
class TanHelperImageFilter
  : public UnaryFunctorImageFilter<
      TInputImage,
      TOutputImage,
      Function::TanHelper<typename TInputImage::PixelType, typename TOutputImage::PixelType>>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(TanHelperImageFilter);

  /** Standard class type aliases. */
  using Self = TanHelperImageFilter;
  using Superclass =
    UnaryFunctorImageFilter<TInputImage,
                            TOutputImage,
                            Function::TanHelper<typename TInputImage::PixelType, typename TOutputImage::PixelType>>;

  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** Runtime information support. */
  itkTypeMacro(TanHelperImageFilter, UnaryFunctorImageFilter);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro(InputConvertibleToDoubleCheck, (Concept::Convertible<typename TInputImage::PixelType, double>));
  itkConceptMacro(DoubleConvertibleToOutputCheck, (Concept::Convertible<double, typename TOutputImage::PixelType>));
  // End concept checking
#endif
protected:
  TanHelperImageFilter() = default;
  ~TanHelperImageFilter() override = default;
};

} // namespace itk

int
itkSimpleFilterWatcherTest(int, char *[])
{
  // Test out the code
  using WatcherType = itk::SimpleFilterWatcher;
  using ImageType = itk::Image<char, 3>;
  using FilterType = itk::TanHelperImageFilter<ImageType, ImageType>;
  auto         filter = FilterType::New();
  const char * comment = "comment";

  // Test constructor that takes a ProcessObject.
  WatcherType watcher1(filter, comment);

  // Test copy constructor.
  WatcherType watcher2(watcher1);
  if (watcher1.GetNameOfClass() != watcher2.GetNameOfClass() || watcher1.GetProcess() != watcher2.GetProcess() ||
      watcher1.GetSteps() != watcher2.GetSteps() || watcher1.GetIterations() != watcher2.GetIterations() ||
      watcher1.GetQuiet() != watcher2.GetQuiet() || watcher1.GetComment() != watcher2.GetComment())
  //|| watcher1.GetTimeProbe() != watcher2.GetTimeProbe() )
  {
    std::cout << "Copy constructor failed." << std::endl;
    return EXIT_FAILURE;
  }

  // Test default constructor.
  WatcherType watcher3;

  // Test assignment operator.
  watcher3 = watcher2;
  if (watcher3.GetNameOfClass() != watcher2.GetNameOfClass() || watcher3.GetProcess() != watcher2.GetProcess() ||
      watcher3.GetSteps() != watcher2.GetSteps() || watcher3.GetIterations() != watcher2.GetIterations() ||
      watcher3.GetQuiet() != watcher2.GetQuiet() || watcher3.GetComment() != watcher2.GetComment())
  //|| watcher3.GetTimeProbe() != watcher2.GetTimeProbe() )
  {
    std::cout << "Operator= failed." << std::endl;
    return EXIT_FAILURE;
  }

  // Test GetNameOfClass().
  std::string name = watcher3.GetNameOfClass();
  if (name != filter->GetNameOfClass())
  {
    std::cout << "GetNameOfClass failed. Expected: " << filter->GetNameOfClass()
              << " but got: " << watcher3.GetNameOfClass() << std::endl;
    return EXIT_FAILURE;
  }

  // Test Quiet functions.
  watcher3.QuietOff();
  watcher3.QuietOn();
  watcher3.SetQuiet(false);
  if (watcher3.GetQuiet() != false)
  {
    std::cout << "GetQuiet() failed." << std::endl;
    return EXIT_FAILURE;
  }

  // Test comment.
  if (watcher3.GetComment() != comment)
  {
    std::cout << "GetComment() failed." << std::endl;
    return EXIT_FAILURE;
  }

  // Check Pointer
  if (watcher3.GetProcess() != filter)
  {
    std::cout << "GetProcess() failed." << std::endl;
    return EXIT_FAILURE;
  }

  // Test the SetFunctor operation
  filter->SetFunctor(itk::Function::TanHelper<ImageType::PixelType, ImageType::PixelType>());

  // Return success.
  std::cout << "SimpleFilterWatcher test PASSED ! " << std::endl;
  return EXIT_SUCCESS;
}
