//  SMESH SMDS : implementaion of Salome mesh data structure
//
//  Copyright (C) 2003  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.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 

#ifdef _MSC_VER
#pragma warning(disable:4786)
#endif

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

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)
{
	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)
{
	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
 * 
 * Index is wrapped if it is out of a valid range
 */
const SMDS_MeshNode* SMDS_FaceOfEdges::GetNode(const int ind) const
{
  int index = WrappedIndex( 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;
}