#include <Standard_Stream.hxx>

#include <GEOMImpl_MirrorDriver.hxx>

#include <GEOMImpl_IMirror.hxx>
#include <GEOMImpl_Types.hxx>
#include <GEOM_Function.hxx>

#include <BRep_Tool.hxx>
#include <BRepBuilderAPI_Transform.hxx>

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

#include <Geom_Plane.hxx>

#include <gp_Trsf.hxx>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>

//=======================================================================
//function : GetID
//purpose  :
//======================================================================= 
const Standard_GUID& GEOMImpl_MirrorDriver::GetID()
{
  static Standard_GUID aMirrorDriver("FF1BBB57-5D14-4df2-980B-3A668264EA16");
  return aMirrorDriver; 
}


//=======================================================================
//function : GEOMImpl_MirrorDriver
//purpose  : 
//=======================================================================

GEOMImpl_MirrorDriver::GEOMImpl_MirrorDriver() 
{
}

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

  if (aFunction.IsNull()) return 0;

  TopoDS_Shape aShape;
  gp_Trsf aTrsf;

  GEOMImpl_IMirror TI (aFunction);
  Standard_Integer aType = aFunction->GetType();

  Handle(GEOM_Function) anOriginalFunction = TI.GetOriginal();
  if (anOriginalFunction.IsNull()) return 0;

  TopoDS_Shape anOriginal = anOriginalFunction->GetValue();
  if (anOriginal.IsNull()) return 0;

  if (aType == MIRROR_PLANE || aType == MIRROR_PLANE_COPY) {
    Handle(GEOM_Function) aPlane = TI.GetPlane();
    if (aPlane.IsNull()) return 0;
    TopoDS_Shape aFaceShape = aPlane->GetValue();
    if (aFaceShape.IsNull() || aFaceShape.ShapeType() != TopAbs_FACE) return 0;
    TopoDS_Face aFace = TopoDS::Face(aFaceShape);

    Handle(Geom_Surface) surf = BRep_Tool::Surface(aFace);
    Handle(Geom_Plane) myPlane = Handle(Geom_Plane)::DownCast(surf);
    const gp_Ax3 pos = myPlane->Position();
    const gp_Pnt loc = pos.Location();  /* location of the plane */
    const gp_Dir dir = pos.Direction(); /* Main direction of the plane (Z axis) */
    gp_Ax2 aPln (loc, dir);
    aTrsf.SetMirror(aPln);

  } else if (aType == MIRROR_AXIS || aType == MIRROR_AXIS_COPY) {
    Handle(GEOM_Function) anAxis = TI.GetAxis();
    if (anAxis.IsNull()) return 0;
    TopoDS_Shape anAxisShape = anAxis->GetValue();
    if (anAxisShape.IsNull() || anAxisShape.ShapeType() != TopAbs_EDGE) return 0;
    TopoDS_Edge anEdge = TopoDS::Edge(anAxisShape);

    gp_Pnt aP1 = BRep_Tool::Pnt(TopExp::FirstVertex(anEdge));
    gp_Pnt aP2 = BRep_Tool::Pnt(TopExp::LastVertex (anEdge));
    gp_Vec aV (aP1, aP2);
    gp_Ax1 anAx1 (aP1, aV);
    aTrsf.SetMirror(anAx1);

  } else if (aType == MIRROR_POINT || aType == MIRROR_POINT_COPY) {
    Handle(GEOM_Function) aPoint = TI.GetPoint();
    if (aPoint.IsNull()) return 0;
    TopoDS_Shape aVertexShape = aPoint->GetValue();
    if (aVertexShape.IsNull() || aVertexShape.ShapeType() != TopAbs_VERTEX) return 0;
    TopoDS_Vertex aVertex = TopoDS::Vertex(aVertexShape);

    gp_Pnt aP = BRep_Tool::Pnt(aVertex);
    aTrsf.SetMirror(aP);
  } else {
    return 0;
  }

  BRepBuilderAPI_Transform aTransformation (anOriginal, aTrsf, Standard_False);
  aShape = aTransformation.Shape();

  if (aShape.IsNull()) return 0;

  aFunction->SetValue(aShape);

  log.SetTouched(Label()); 

  return 1;
}


//=======================================================================
//function :  GEOMImpl_MirrorDriver_Type_
//purpose  :
//======================================================================= 
Standard_EXPORT Handle_Standard_Type& GEOMImpl_MirrorDriver_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_MirrorDriver",
			                                 sizeof(GEOMImpl_MirrorDriver),
			                                 1,
			                                 (Standard_Address)_Ancestors,
			                                 (Standard_Address)NULL);

  return _aType;
}

//=======================================================================
//function : DownCast
//purpose  :
//======================================================================= 

const Handle(GEOMImpl_MirrorDriver) Handle(GEOMImpl_MirrorDriver)::DownCast(const Handle(Standard_Transient)& AnObject)
{
  Handle(GEOMImpl_MirrorDriver) _anOtherObject;

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

  return _anOtherObject ;
}