/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2018 Adrian Kummerlaender
 *  E-mail contact: info@openlb.net
 *  The most recent release of OpenLB can be downloaded at
 *  <http://www.openlb.net/>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA  02110-1301, USA.
*/

#ifndef SUPER_AVERAGE_3D_HH
#define SUPER_AVERAGE_3D_HH

#include "superAverage3D.h"
#include "indicator/superIndicatorF3D.h"

namespace olb {


template <typename T, typename W>
SuperAverage3D<T,W>::SuperAverage3D(FunctorPtr<SuperF3D<T,W>>&&        f,
                                    FunctorPtr<SuperIndicatorF3D<T>>&& indicatorF)
  : SuperF3D<T,W>(f->getSuperStructure(), f->getTargetDim()+1),
    _f(std::move(f)),
    _indicatorF(std::move(indicatorF))
{
  this->getName() = "Average("+_f->getName()+")";

  LoadBalancer<T>& load = _f->getSuperStructure().getLoadBalancer();

  if ( _f->getBlockFSize()          == load.size() &&
       _indicatorF->getBlockFSize() == load.size() ) {
    for (int iC = 0; iC < load.size(); ++iC) {
      this->_blockF.emplace_back(
        new BlockAverage3D<T,W>(_f->getBlockF(iC),
                                _indicatorF->getBlockIndicatorF(iC))
      );
    }
  }
}

template <typename T, typename W>
SuperAverage3D<T,W>::SuperAverage3D(FunctorPtr<SuperF3D<T,W>>&& f,
                                    SuperGeometry3D<T>& superGeometry,
                                    const int material)
  : SuperAverage3D(
      std::forward<decltype(f)>(f),
      superGeometry.getMaterialIndicator(material))
{ }

template <typename T, typename W>
bool SuperAverage3D<T,W>::operator() (W output[], const int input[])
{
  _f->getSuperStructure().communicate();
  CuboidGeometry3D<T>& geometry = _f->getSuperStructure().getCuboidGeometry();
  LoadBalancer<T>&     load     = _f->getSuperStructure().getLoadBalancer();

  for (int i = 0; i < _f->getTargetDim(); ++i) {
    output[i] = W(0);
  }

  W outputTmp[_f->getTargetDim()];
  int inputTmp[_f->getSourceDim()];
  std::size_t voxels(0);

  for (int iC = 0; iC < load.size(); ++iC) {
    const Cuboid3D<T> cuboid = geometry.get(load.glob(iC));
    inputTmp[0] = load.glob(iC);
    for (inputTmp[1] = 0; inputTmp[1] < cuboid.getNx(); ++inputTmp[1]) {
      for (inputTmp[2] = 0; inputTmp[2] < cuboid.getNy(); ++inputTmp[2]) {
        for (inputTmp[3] = 0; inputTmp[3] < cuboid.getNz(); ++inputTmp[3]) {
          if (_indicatorF(inputTmp)) {
            _f(outputTmp,inputTmp);
            for (int i = 0; i < _f->getTargetDim(); ++i) {
              output[i] += outputTmp[i];
            }
            voxels += 1;
          }
        }
      }
    }
  }

#ifdef PARALLEL_MODE_MPI
  for (int i = 0; i < _f->getTargetDim(); ++i) {
    singleton::mpi().reduceAndBcast(output[i], MPI_SUM);
  }
  singleton::mpi().reduceAndBcast(voxels, MPI_SUM);
#endif

  output[_f->getTargetDim()] = voxels;
  for (int i = 0; i < _f->getTargetDim(); ++i) {
    output[i] /= output[_f->getTargetDim()];
  }

  return true;
}


}

#endif