/*=========================================================================
 *
 *  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 itkANNkDTree_hxx
#define itkANNkDTree_hxx

#include "itkANNkDTree.h"
#include "itkANNBinaryTreeCreator.h"

namespace itk
{

/**
 * ************************ Constructor *************************
 */

template <typename TListSample>
ANNkDTree<TListSample>::ANNkDTree()
{
  this->m_ANNTree = nullptr;
  this->m_SplittingRule = ANN_KD_SL_MIDPT;
  this->m_BucketSize = 1;

} // end Constructor()


/**
 * ************************ Destructor *************************
 */

template <typename TListSample>
ANNkDTree<TListSample>::~ANNkDTree()
{
  ANNBinaryTreeCreator::DeleteANNkDTree(this->m_ANNTree);

} // end Destructor()


/**
 * ************************ SetSplittingRule *************************
 */

template <typename TListSample>
void
ANNkDTree<TListSample>::SetSplittingRule(const std::string & rule)
{
  if (rule == "ANN_KD_STD")
  {
    this->m_SplittingRule = ANN_KD_STD;
  }
  else if (rule == "ANN_KD_MIDPT")
  {
    this->m_SplittingRule = ANN_KD_MIDPT;
  }
  else if (rule == "ANN_KD_FAIR")
  {
    this->m_SplittingRule = ANN_KD_FAIR;
  }
  else if (rule == "ANN_KD_SL_MIDPT")
  {
    this->m_SplittingRule = ANN_KD_SL_MIDPT;
  }
  else if (rule == "ANN_KD_SL_FAIR")
  {
    this->m_SplittingRule = ANN_KD_SL_FAIR;
  }
  else if (rule == "ANN_KD_SUGGEST")
  {
    this->m_SplittingRule = ANN_KD_SUGGEST;
  }
  else
  {
    itkWarningMacro("WARNING: No such spliting rule.");
  }

} // end SetSplittingRule()


/**
 * ************************ GetSplittingRule *************************
 */

template <typename TListSample>
std::string
ANNkDTree<TListSample>::GetSplittingRule()
{
  switch (this->m_SplittingRule)
  {
    case ANN_KD_STD:
      return "ANN_KD_STD";
    case ANN_KD_MIDPT:
      return "ANN_KD_MIDPT";
    case ANN_KD_FAIR:
      return "ANN_KD_FAIR";
    case ANN_KD_SL_MIDPT:
      return "ANN_KD_SL_MIDPT";
    case ANN_KD_SL_FAIR:
      return "ANN_KD_SL_FAIR";
    case ANN_KD_SUGGEST:
      return "ANN_KD_SUGGEST";
  }

} // end GetSplittingRule()


/**
 * ************************ GenerateTree *************************
 */

template <typename TListSample>
void
ANNkDTree<TListSample>::GenerateTree()
{
  int dim = static_cast<int>(this->GetDataDimension());
  int nop = static_cast<int>(this->GetActualNumberOfDataPoints());
  int bcs = static_cast<int>(this->m_BucketSize);

  ANNBinaryTreeCreator::DeleteANNkDTree(this->m_ANNTree);

  this->m_ANNTree = ANNBinaryTreeCreator::CreateANNkDTree(
    this->GetSample()->GetInternalContainer(), nop, dim, bcs, this->m_SplittingRule);

} // end GenerateTree()


/**
 * ************************ PrintSelf *************************
 */

template <typename TListSample>
void
ANNkDTree<TListSample>::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << indent << "ANNTree: " << this->m_ANNTree << std::endl;
  os << indent << "SplittingRule: " << this->m_SplittingRule << std::endl;
  os << indent << "BucketSize: " << this->m_BucketSize << std::endl;

} // end PrintSelf()


} // end namespace itk

#endif // end #ifndef itkANNkDTree_hxx
