/*=========================================================================
 *
 *  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.
 *
 *=========================================================================*/

#ifndef itkLevelSetQuadEdgeMesh_hxx
#define itkLevelSetQuadEdgeMesh_hxx


namespace itk
{
template <typename TMesh>
auto
LevelSetQuadEdgeMesh<TMesh>::Evaluate(const InputType & iP) const -> OutputType
{
  OutputType oValue = 0.;
  this->m_Mesh->GetPointData(iP, &oValue);
  return oValue;
}

template <typename TMesh>
auto
LevelSetQuadEdgeMesh<TMesh>::EvaluateGradient(const InputType & itkNotUsed(iP)) const -> GradientType
{
  itkWarningMacro("to be implemented");
  return Self::GradientType(); // Create a new object with default initializer
}

template <typename TMesh>
auto
LevelSetQuadEdgeMesh<TMesh>::EvaluateHessian(const InputType & itkNotUsed(iP)) const -> HessianType
{
  itkWarningMacro("to be implemented");
  return Self::HessianType(); // Create a new object with default initializer
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::Evaluate(const InputType & iP, LevelSetDataType & ioData) const
{
  // if it has not already been computed before
  if (!ioData.Value.first)
  {
    ioData.Value.first = true;
    this->m_Mesh->GetPointData(iP, &(ioData.Value.second));
  }
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::EvaluateGradient(const InputType & itkNotUsed(iP), LevelSetDataType & ioData) const
{

  // if it has not already been computed before
  if (!ioData.Gradient.first)
  {
    ioData.Gradient.second = true;

    // compute the gradient
    ///\todo implement the computation of the gradient
  }
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::EvaluateHessian(const InputType & itkNotUsed(iP), LevelSetDataType & ioData) const
{
  if (!ioData.Hessian.first)
  {
    ioData.Hessian.first = true;

    // compute the hessian
    ///\todo implement the computation of the hessian
  }
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::Initialize()
{
  Superclass::Initialize();

  this->m_Mesh = nullptr;
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::CopyInformation(const DataObject * data)
{
  Superclass::CopyInformation(data);

  const auto * levelSet = dynamic_cast<const Self *>(data);

  if (!levelSet)
  {
    // pointer could not be cast back down
    itkExceptionMacro("itk::LevelSetQuadEdgeMesh::CopyInformation() cannot cast " << typeid(data).name() << " to "
                                                                                  << typeid(Self *).name());
  }
}

template <typename TMesh>
void
LevelSetQuadEdgeMesh<TMesh>::Graft(const DataObject * data)
{
  Superclass::Graft(data);
  const auto * levelSet = dynamic_cast<const Self *>(data);

  if (!levelSet)
  {
    // pointer could not be cast back down
    itkExceptionMacro("itk::LevelSetQuadEdgeMesh::CopyInformation() cannot cast " << typeid(data).name() << " to "
                                                                                  << typeid(Self *).name());
  }

  this->m_Mesh = levelSet->m_Mesh;
}

} // namespace itk

#endif // itkLevelSetQuadEdgeMesh_hxx
