/*=========================================================================
 *
 *  Copyright UMC Utrecht and contributors
 *
 *  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.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 elxAdvancedNormalizedCorrelationMetric_hxx
#define elxAdvancedNormalizedCorrelationMetric_hxx

#include "elxAdvancedNormalizedCorrelationMetric.h"
#include "itkTimeProbe.h"

namespace elastix
{

/**
 * ***************** BeforeEachResolution ***********************
 */

template <typename TElastix>
void
AdvancedNormalizedCorrelationMetric<TElastix>::BeforeEachResolution()
{
  const Configuration & configuration = itk::Deref(Superclass2::GetConfiguration());

  if (configuration.HasParameter("SubtractMean"))
  {
    /** Get the current resolution level. */
    unsigned int level = (this->m_Registration->GetAsITKBaseType())->GetCurrentLevel();

    /** Get and set SubtractMean. Default true. */
    bool subtractMean = true;
    configuration.ReadParameter(subtractMean, "SubtractMean", BaseComponent::GetComponentLabel(), level, 0);

    if (subtractMean)
    {
      log::info("From elastix > version 5.1.0, AdvancedNormalizedCorrelationMetric ignores parameter SubtractMean, and "
                "just behaves as if its value is true.");
    }
    else
    {
      log::warn("From elastix > version 5.1.0, AdvancedNormalizedCorrelationMetric no longer supports \"false\" as "
                "value of parameter SubtractMean! It just behaves as if its value is true!");
    }
  }

} // end BeforeEachResolution()


/**
 * ******************* Initialize ***********************
 */

template <typename TElastix>
void
AdvancedNormalizedCorrelationMetric<TElastix>::Initialize()
{
  itk::TimeProbe timer;
  timer.Start();
  this->Superclass1::Initialize();
  timer.Stop();
  log::info(std::ostringstream{} << "Initialization of AdvancedNormalizedCorrelation metric took: "
                                 << static_cast<std::int64_t>(timer.GetMean() * 1000) << " ms.");

} // end Initialize()


} // end namespace elastix

#endif // end #ifndef elxAdvancedNormalizedCorrelationMetric_hxx
