// Copyright (C) 2007-2012  CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
// 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.
//
// 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
//

//  SMESH SMDS : implementaion of Salome mesh data structure
//
#ifdef _MSC_VER
#pragma warning(disable:4786)
#endif

#include "SMDS_FaceOfEdges.hxx"
#include "SMDS_IteratorOfElements.hxx"
#include "SMDS_MeshNode.hxx"
#include "utilities.h"

using namespace std;

//=======================================================================
//function : NbEdges
//purpose  : 
//=======================================================================

int SMDS_FaceOfEdges::NbEdges() const
{
        return myNbEdges;
}

int SMDS_FaceOfEdges::NbFaces() const
{
        return 1;
}
//=======================================================================
//function : Print
//purpose  : 
//=======================================================================

void SMDS_FaceOfEdges::Print(ostream & OS) const
{
        OS << "face <" << GetID() << " > : ";
        int i;
        for (i = 0; i < NbEdges() - 1; i++) OS << myEdges[i] << ",";
        OS << myEdges[i] << ") " << endl;
}

SMDSAbs_ElementType SMDS_FaceOfEdges::GetType() const
{
        return SMDSAbs_Face;
}

//=======================================================================
//function : elementsIterator
//purpose  : 
//=======================================================================

class SMDS_FaceOfEdges_MyIterator:public SMDS_ElemIterator
{
  const SMDS_MeshEdge* const *mySet;
  int myLength;
  int index;
 public:
  SMDS_FaceOfEdges_MyIterator(const SMDS_MeshEdge* const *s, int l):
    mySet(s),myLength(l),index(0) {}

  bool more()
  {
    return index<myLength;
  }

  const SMDS_MeshElement* next()
  {
    index++;
    return mySet[index-1];
  }     
};

SMDS_ElemIteratorPtr SMDS_FaceOfEdges::elementsIterator
                         (SMDSAbs_ElementType type) const
{
  switch(type)
  {
  case SMDSAbs_Face:
    return SMDS_MeshElement::elementsIterator(SMDSAbs_Face);
  case SMDSAbs_Edge:
    return SMDS_ElemIteratorPtr(new SMDS_FaceOfEdges_MyIterator(myEdges,myNbEdges));
  default:
    return SMDS_ElemIteratorPtr
      (new SMDS_IteratorOfElements
       (this,type, SMDS_ElemIteratorPtr
        (new SMDS_FaceOfEdges_MyIterator(myEdges,myNbEdges))));
  }
}

SMDS_FaceOfEdges::SMDS_FaceOfEdges(const SMDS_MeshEdge* edge1,
                                   const SMDS_MeshEdge* edge2,
                                   const SMDS_MeshEdge* edge3)
{
  //MESSAGE("****************************************************** SMDS_FaceOfEdges");
        myNbEdges = 3;
        myEdges[0]=edge1;
        myEdges[1]=edge2;
        myEdges[2]=edge3;
        myEdges[3]=0;
}

SMDS_FaceOfEdges::SMDS_FaceOfEdges(const SMDS_MeshEdge* edge1,
                                   const SMDS_MeshEdge* edge2,
                                   const SMDS_MeshEdge* edge3,
                                   const SMDS_MeshEdge* edge4)
{
  //MESSAGE("****************************************************** SMDS_FaceOfEdges");
        myNbEdges = 4;
        myEdges[0]=edge1;
        myEdges[1]=edge2;
        myEdges[2]=edge3;
        myEdges[3]=edge4;       
}

/*bool operator<(const SMDS_FaceOfEdges& f1, const SMDS_FaceOfEdges& f2)
{
        set<SMDS_MeshNode> set1,set2;
        SMDS_ElemIteratorPtr it;
        const SMDS_MeshNode * n;

        it=f1.nodesIterator();

        while(it->more())
        {
                n=static_cast<const SMDS_MeshNode *>(it->next());
                set1.insert(*n);
        }

        delete it;
        it=f2.nodesIterator();
        
        while(it->more())
        {       
                n=static_cast<const SMDS_MeshNode *>(it->next());
                set2.insert(*n);
        }

        delete it;
        return set1<set2;       

}*/


int SMDS_FaceOfEdges::NbNodes() const
{
  return myEdges[0]->NbNodes() + myEdges[1]->NbNodes() + myEdges[2]->NbNodes() +
    ( myNbEdges == 4 ? myEdges[3]->NbNodes() : 0 ) - myNbEdges;
}

/*!
 * \brief Return node by its index
 * \param ind - node index
 * \retval const SMDS_MeshNode* - the node
 */
const SMDS_MeshNode* SMDS_FaceOfEdges::GetNode(const int ind) const
{
  int index = ind;
  for ( int i = 0; i < myNbEdges; ++i ) {
    if ( index >= myEdges[ i ]->NbNodes() )
      index -= myEdges[ i ]->NbNodes();
    else
      return myEdges[ i ]->GetNode( index );
  }
  return 0;
}

SMDSAbs_EntityType SMDS_FaceOfEdges::GetEntityType() const
{
  return myNbEdges == 3 ? SMDSEntity_Triangle : SMDSEntity_Quadrangle;
}

SMDSAbs_GeometryType SMDS_FaceOfEdges::GetGeomType() const
{
  return myNbEdges == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE;
}