// Copyright (C) 2007-2022  CEA/DEN, EDF R&D
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
// Author : Anthony Geay (EDF R&D)

#pragma once

#include "Interpolation3D1D.hxx"
#include "Interpolation.txx"
#include "MeshElement.txx"
#include "PointLocator3DIntersectorP0P0.txx"
#include "PointLocator3DIntersectorP0P1.txx"
#include "PointLocator3DIntersectorP1P0.txx"
#include "PointLocator3DIntersectorP1P1.txx"
#include "Log.hxx"

#include "InterpolationHelper.txx"

namespace INTERP_KERNEL
{
  /**
   *  Very similar to Interpolation3D::interpolateMeshes, except for the bounding boxes that can be
   *  adjusted in a similar fashion as in InterpolationPlanar::performAdjustmentOfBB()
   **/
  template<class MyMeshType, class MatrixType>
  typename MyMeshType::MyConnType Interpolation3D1D::interpolateMeshes(const MyMeshType& srcMesh, const MyMeshType& targetMesh, MatrixType& result, const std::string& method)
  {
    if(InterpolationOptions::getIntersectionType() != PointLocator)
      INTERP_KERNEL::Exception("Invalid 3D/1D-0D intersection type specified : must be PointLocator.");

    typedef typename MyMeshType::MyConnType ConnType;
    // create MeshElement objects corresponding to each element of the two meshes
    const ConnType numTargetElems = targetMesh.getNumberOfElements();

    LOG(2, "Target mesh has " << numTargetElems << " elements ");

    std::unique_ptr< Intersector3D<MyMeshType,MatrixType> > intersector;
    std::string methC = InterpolationOptions::filterInterpolationMethod(method);
    if(methC=="P0P0")
      { intersector.reset( new PointLocator3DIntersectorP0P0<MyMeshType,MatrixType>(targetMesh, srcMesh, getPrecision()) );
      }
    else if(methC=="P0P1")
      {  intersector.reset( new PointLocator3DIntersectorP0P1<MyMeshType,MatrixType>(targetMesh, srcMesh, getPrecision()) );
      }
    else if(methC=="P1P0")
      {  intersector.reset( new PointLocator3DIntersectorP1P0<MyMeshType,MatrixType>(targetMesh, srcMesh, getPrecision()) );
      }
    else if(methC=="P1P1")
      {  intersector.reset( new PointLocator3DIntersectorP1P1<MyMeshType,MatrixType>(targetMesh, srcMesh, getPrecision()) );
      }
    else
      throw Exception("Invalid method chosen must be in \"P0P0\", \"P0P1\", \"P1P0\" or \"P1P1\".");
    // create empty maps for all source elements
    result.resize(intersector->getNumberOfRowsOfResMatrix());

    BBTreeStandAlone<3,ConnType> tree( BuildBBTreeWithAdjustment(srcMesh,[this](double *bbox, typename MyMeshType::MyConnType sz){ this->adjustBoundingBoxes(bbox,sz); }) );

    // for each target element, get source elements with which to calculate intersection
    // - calculate intersection by calling intersectCells
    for(ConnType i = 0; i < numTargetElems; ++i)
      {
        MeshElement<ConnType> trgMeshElem(i, targetMesh);
        
        const BoundingBox* box = trgMeshElem.getBoundingBox();
        // get target bbox in right order
        double targetBox[6];
        box->fillInXMinXmaxYminYmaxZminZmaxFormat(targetBox);

        std::vector<ConnType> intersectElems;

        tree.getIntersectingElems(targetBox, intersectElems);

        if ( !intersectElems.empty() )
          intersector->intersectCells(i,intersectElems,result);
      }
    return intersector->getNumberOfColsOfResMatrix();
  }
}