#include "SMDS_VtkCellIterator.hxx"
#include "utilities.h"

SMDS_VtkCellIterator::SMDS_VtkCellIterator(SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType aType) :
  _mesh(mesh), _cellId(vtkCellId), _index(0), _type(aType)
{
  //MESSAGE("SMDS_VtkCellIterator " << _type);
  _vtkIdList = vtkIdList::New();
  vtkUnstructuredGrid* grid = _mesh->getGrid();
  grid->GetCellPoints(_cellId, _vtkIdList);
  _nbNodes = _vtkIdList->GetNumberOfIds();
  switch (_type)
  {
    case SMDSEntity_Tetra:
      {
        this->exchange(1, 2);
        break;
      }
    case SMDSEntity_Pyramid:
      {
        this->exchange(1, 3);
        break;
      }
    case SMDSEntity_Penta:
      {
        //this->exchange(1, 2);
        //this->exchange(4, 5);
        break;
      }
    case SMDSEntity_Hexa:
      {
        this->exchange(1, 3);
        this->exchange(5, 7);
        break;
      }
    case SMDSEntity_Quad_Tetra:
      {
        this->exchange(1, 2);
        this->exchange(4, 6);
        this->exchange(8, 9);
        break;
      }
    case SMDSEntity_Quad_Pyramid:
      {
        this->exchange(1, 3);
        this->exchange(5, 8);
        this->exchange(6, 7);
        this->exchange(10, 12);
        break;
      }
    case SMDSEntity_Quad_Penta:
      {
        //this->exchange(1, 2);
        //this->exchange(4, 5);
        //this->exchange(6, 8);
        //this->exchange(9, 11);
        //this->exchange(13, 14);
        break;
      }
    case SMDSEntity_Quad_Hexa:
      {
        MESSAGE("SMDS_VtkCellIterator Quad_Hexa");
        this->exchange(1, 3);
        this->exchange(5, 7);
        this->exchange(8, 11);
        this->exchange(9, 10);
        this->exchange(12, 15);
        this->exchange(13, 14);
        this->exchange(17, 19);
        break;
      }
    case SMDSEntity_Polyhedra:
      {
        MESSAGE("SMDS_VtkCellIterator Polyhedra");
        break;
      }
    default:
      break;
  }
}

SMDS_VtkCellIterator::~SMDS_VtkCellIterator()
{
  _vtkIdList->Delete();
}

bool SMDS_VtkCellIterator::more()
{
  return (_index < _nbNodes);
}

const SMDS_MeshElement* SMDS_VtkCellIterator::next()
{
  vtkIdType id = _vtkIdList->GetId(_index++);
  return _mesh->FindNode(id);
}

SMDS_VtkCellIteratorToUNV::SMDS_VtkCellIteratorToUNV(SMDS_Mesh* mesh,
                                                               int vtkCellId,
                                                               SMDSAbs_EntityType aType)
: SMDS_VtkCellIterator()
{
  _mesh = mesh;
  _cellId = vtkCellId;
  _index = 0;
  _type = aType;
  //MESSAGE("SMDS_VtkCellInterlacedIterator " << _type);

  _vtkIdList = vtkIdList::New();
  vtkIdType* pts;
  vtkUnstructuredGrid* grid = _mesh->getGrid();
  grid->GetCellPoints(_cellId, _nbNodes, pts);
  _vtkIdList->SetNumberOfIds(_nbNodes);
  int *ids = 0;
  switch (_type)
  {
    case SMDSEntity_Quad_Edge:
      {
        static int id[] = {0,2,1};
        ids = id;
        break;
      }
    case SMDSEntity_Quad_Triangle:
      {
        static int id[] = {0,3,1,4,2,5};
        ids = id;
        break;
      }
    case SMDSEntity_Quad_Quadrangle:
      {
        static int id[] = {0,4,1,5,2,6,3,7};
        ids = id;
        break;
      }
   case SMDSEntity_Quad_Tetra:
      {
        static int id[] = {0,4,1,5,2,6,7,8,9,3};
        ids = id;
        break;
      }
    case SMDSEntity_Quad_Pyramid:
      {
        static int id[] = {0,5,1,6,2,7,3,8,9,10,11,12,4};
        ids = id;
        break;
      }
    case SMDSEntity_Penta:
      {
        static int id[] = {0,2,1,3,5,4};
        ids = id;
        break;
      }
   case SMDSEntity_Quad_Penta:
      {
        static int id[] = {0,8,2,7,1,6,12,14,13,3,11,5,10,4,9};
        ids = id;
        break;
      }
    case SMDSEntity_Quad_Hexa:
      {
        static int id[] = {0,8,1,9,2,10,3,11,16,17,18,19,4,12,5,13,6,14,7,15};
        ids = id;
       break;
      }
    case SMDSEntity_Polygon:
    case SMDSEntity_Quad_Polygon:
    case SMDSEntity_Polyhedra:
    case SMDSEntity_Quad_Polyhedra:
    default:
      {
        static int id[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29};
        ids = id;
        break;
      }
  }
  //MESSAGE("_nbNodes " << _nbNodes);
  for (int i=0; i<_nbNodes; i++)
    _vtkIdList->SetId(i, pts[ids[i]]);
}

SMDS_VtkCellIteratorToUNV::~SMDS_VtkCellIteratorToUNV()
{
}