// Copyright (C) 2005  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
//

#include <Standard_Stream.hxx>

#include <GEOMImpl_SplineDriver.hxx>
#include <GEOMImpl_ISpline.hxx>
#include <GEOMImpl_Types.hxx>
#include <GEOM_Function.hxx>

#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRep_Tool.hxx>

#include <TopAbs.hxx>
#include <TopExp.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Vertex.hxx>

#include <Geom_BezierCurve.hxx>
//#include <GeomAPI_PointsToBSpline.hxx>
#include <GeomAPI_Interpolate.hxx>

#include <gp.hxx>
#include <gp_Pnt.hxx>
#include <gp_Circ.hxx>
#include <Precision.hxx>
#include <TColgp_Array1OfPnt.hxx>
#include <TColgp_HArray1OfPnt.hxx>

//=======================================================================
//function : GetID
//purpose  :
//=======================================================================
const Standard_GUID& GEOMImpl_SplineDriver::GetID()
{
  static Standard_GUID aSplineDriver("FF1BBB33-5D14-4df2-980B-3A668264EA16");
  return aSplineDriver;
}


//=======================================================================
//function : GEOMImpl_SplineDriver
//purpose  :
//=======================================================================
GEOMImpl_SplineDriver::GEOMImpl_SplineDriver()
{
}

//=======================================================================
//function : Execute
//purpose  :
//=======================================================================
Standard_Integer GEOMImpl_SplineDriver::Execute(TFunction_Logbook& log) const
{
  if (Label().IsNull()) return 0;
  Handle(GEOM_Function) aFunction = GEOM_Function::GetFunction(Label());

  GEOMImpl_ISpline aCI (aFunction);
  Standard_Integer aType = aFunction->GetType();

  TopoDS_Shape aShape;

  if (aType == SPLINE_BEZIER || aType == SPLINE_INTERPOLATION) {
    int ind, aLen = aCI.GetLength();
    if (aLen < 2) return 0;
    Standard_Boolean isSeveral = Standard_False;
    gp_Pnt aPrevP;
    TColgp_Array1OfPnt CurvePoints (1, aLen);
    for (ind = 1; ind <= aLen; ind++) {
      Handle(GEOM_Function) aRefPoint = aCI.GetPoint(ind);
      TopoDS_Shape aShapePnt = aRefPoint->GetValue();
      if (aShapePnt.ShapeType() == TopAbs_VERTEX) {
        gp_Pnt aP = BRep_Tool::Pnt(TopoDS::Vertex(aShapePnt));
        if (!isSeveral && ind > 1) {
          if (aP.Distance(aPrevP) > Precision::Confusion()) {
            isSeveral = Standard_True;
          }
        }
 	CurvePoints.SetValue(ind, aP);
        aPrevP = aP;
      }
    }
    if (aType == SPLINE_BEZIER) {
      if (!isSeveral) {
        Standard_ConstructionError::Raise("Points for Bezier Curve are too close");
      }
      Handle(Geom_BezierCurve) GBC = new Geom_BezierCurve(CurvePoints);
      aShape = BRepBuilderAPI_MakeEdge(GBC).Edge();
    } else {
//      GeomAPI_PointsToBSpline GBC (CurvePoints);
//      aShape = BRepBuilderAPI_MakeEdge(GBC).Edge();
      Handle(TColgp_HArray1OfPnt) aHCurvePoints = new TColgp_HArray1OfPnt(1, aLen);
      for (ind = 1; ind <= aLen; ind++) {
 	aHCurvePoints->SetValue(ind, CurvePoints.Value(ind));
      }
      GeomAPI_Interpolate GBC (aHCurvePoints, Standard_False, gp::Resolution());
      GBC.Perform();
      if (GBC.IsDone())
        aShape = BRepBuilderAPI_MakeEdge(GBC.Curve()).Edge();
      else
        return 0;
    }
  }
  else {
  }

  if (aShape.IsNull()) return 0;

  aFunction->SetValue(aShape);

  log.SetTouched(Label());

  return 1;
}


//=======================================================================
//function :  GEOMImpl_SplineDriver_Type_
//purpose  :
//=======================================================================
Standard_EXPORT Handle_Standard_Type& GEOMImpl_SplineDriver_Type_()
{

  static Handle_Standard_Type aType1 = STANDARD_TYPE(TFunction_Driver);
  if ( aType1.IsNull()) aType1 = STANDARD_TYPE(TFunction_Driver);
  static Handle_Standard_Type aType2 = STANDARD_TYPE(MMgt_TShared);
  if ( aType2.IsNull()) aType2 = STANDARD_TYPE(MMgt_TShared);
  static Handle_Standard_Type aType3 = STANDARD_TYPE(Standard_Transient);
  if ( aType3.IsNull()) aType3 = STANDARD_TYPE(Standard_Transient);


  static Handle_Standard_Transient _Ancestors[]= {aType1,aType2,aType3,NULL};
  static Handle_Standard_Type _aType = new Standard_Type("GEOMImpl_SplineDriver",
			                                 sizeof(GEOMImpl_SplineDriver),
			                                 1,
			                                 (Standard_Address)_Ancestors,
			                                 (Standard_Address)NULL);

  return _aType;
}

//=======================================================================
//function : DownCast
//purpose  :
//=======================================================================
const Handle(GEOMImpl_SplineDriver) Handle(GEOMImpl_SplineDriver)::DownCast(const Handle(Standard_Transient)& AnObject)
{
  Handle(GEOMImpl_SplineDriver) _anOtherObject;

  if (!AnObject.IsNull()) {
     if (AnObject->IsKind(STANDARD_TYPE(GEOMImpl_SplineDriver))) {
       _anOtherObject = Handle(GEOMImpl_SplineDriver)((Handle(GEOMImpl_SplineDriver)&)AnObject);
     }
  }

  return _anOtherObject ;
}