// Copyright (C) 2007-2011  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

#include <Standard_Stream.hxx>

#include <GEOMImpl_ChamferDriver.hxx>
#include <GEOMImpl_IChamfer.hxx>
#include <GEOMImpl_Types.hxx>
#include <GEOMImpl_ILocalOperations.hxx>
#include <GEOMImpl_Block6Explorer.hxx>

#include <GEOM_Function.hxx>

#include <BRepLib.hxx>
#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <BRepFilletAPI_MakeChamfer.hxx>

#include <ShapeFix_Shape.hxx>
#include <ShapeFix_ShapeTolerance.hxx>

#include <TopAbs.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_MapOfShape.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>

#include <Precision.hxx>
#include <gp_Pnt.hxx>
#include <StdFail_NotDone.hxx>

//=======================================================================
//function : GetID
//purpose  :
//=======================================================================
const Standard_GUID& GEOMImpl_ChamferDriver::GetID()
{
  static Standard_GUID aChamferDriver("FF1BBB42-5D14-4df2-980B-3A668264EA16");
  return aChamferDriver;
}


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

//=======================================================================
//function : isGoodForChamfer
//purpose  :
//=======================================================================
static Standard_Boolean isGoodForChamfer (const TopoDS_Shape& theShape)
{
  if (theShape.ShapeType() == TopAbs_SHELL ||
      theShape.ShapeType() == TopAbs_SOLID ||
      theShape.ShapeType() == TopAbs_COMPSOLID) {
    return Standard_True;
  }

  if (theShape.ShapeType() == TopAbs_COMPOUND) {
    TopTools_MapOfShape mapShape;
    TopoDS_Iterator It (theShape, Standard_False, Standard_False);
    for (; It.More(); It.Next()) {
      if (mapShape.Add(It.Value())) {
        if (!isGoodForChamfer(It.Value())) {
          return Standard_False;
        }
      }
    }
    return Standard_True;
  }

  return Standard_False;
}

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

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

  TopoDS_Shape aShape;

  Handle(GEOM_Function) aRefShape = aCI.GetShape();
  TopoDS_Shape aShapeBase = aRefShape->GetValue();

  // Check the shape type. It have to be shell
  // or solid, or compsolid, or compound of these shapes.
  if (!isGoodForChamfer(aShapeBase)) {
    StdFail_NotDone::Raise
      ("Wrong shape. Must be shell or solid, or compsolid or compound of these shapes");
  }

  BRepFilletAPI_MakeChamfer fill (aShapeBase);

  if (aType == CHAMFER_SHAPE_ALL) {
    // symmetric chamfer on all edges
    double aD = aCI.GetD();
    TopTools_IndexedDataMapOfShapeListOfShape M;
    GEOMImpl_Block6Explorer::MapShapesAndAncestors(aShapeBase, TopAbs_EDGE, TopAbs_FACE, M);
    for (int i = 1; i <= M.Extent(); i++) {
      TopoDS_Edge E = TopoDS::Edge(M.FindKey(i));
      TopoDS_Face F = TopoDS::Face(M.FindFromIndex(i).First());
      if (!BRepTools::IsReallyClosed(E, F) &&
          !BRep_Tool::Degenerated(E) &&
          M.FindFromIndex(i).Extent() == 2)
        fill.Add(aD, E, F);
    }
  }
  else if (aType == CHAMFER_SHAPE_EDGE || aType == CHAMFER_SHAPE_EDGE_AD) {
    // chamfer on edges, common to two faces, with D1 on the first face

    TopoDS_Shape aFace1, aFace2;
    if (GEOMImpl_ILocalOperations::GetSubShape(aShapeBase, aCI.GetFace1(), aFace1) &&
        GEOMImpl_ILocalOperations::GetSubShape(aShapeBase, aCI.GetFace2(), aFace2))
    {
      TopoDS_Face F = TopoDS::Face(aFace1);

      // fill map of edges of the second face
      TopTools_MapOfShape aMap;
      TopExp_Explorer Exp2 (aFace2, TopAbs_EDGE);
      for (; Exp2.More(); Exp2.Next()) {
        aMap.Add(Exp2.Current());
      }

      // find edges of the first face, common with the second face
      TopExp_Explorer Exp (aFace1, TopAbs_EDGE);
      for (; Exp.More(); Exp.Next()) {
        if (aMap.Contains(Exp.Current())) {
          TopoDS_Edge E = TopoDS::Edge(Exp.Current());
          if (!BRepTools::IsReallyClosed(E, F) && !BRep_Tool::Degenerated(E))
          {
            if ( aType == CHAMFER_SHAPE_EDGE )
            {
              double aD1 = aCI.GetD1();
              double aD2 = aCI.GetD2();
              fill.Add(aD1, aD2, E, F);
            }
            else
            {
              double aD = aCI.GetD();
              double anAngle = aCI.GetAngle();
              if ( (anAngle > 0) && (anAngle < (M_PI/2.)) )
                fill.AddDA(aD, anAngle, E, F);
            }
          }
        }
      }
    }
  }
  else if (aType == CHAMFER_SHAPE_FACES || aType == CHAMFER_SHAPE_FACES_AD) {
    // chamfer on all edges of the selected faces, with D1 on the selected face
    // (on first selected face, if the edge belongs to two selected faces)

    int aLen = aCI.GetLength();
    int ind = 1;
    TopTools_MapOfShape aMap;
    TopTools_IndexedDataMapOfShapeListOfShape M;
    GEOMImpl_Block6Explorer::MapShapesAndAncestors(aShapeBase, TopAbs_EDGE, TopAbs_FACE, M);
    for (; ind <= aLen; ind++)
    {
      TopoDS_Shape aShapeFace;
      if (GEOMImpl_ILocalOperations::GetSubShape(aShapeBase, aCI.GetFace(ind), aShapeFace))
      {
        TopoDS_Face F = TopoDS::Face(aShapeFace);
        TopExp_Explorer Exp (F, TopAbs_EDGE);
        for (; Exp.More(); Exp.Next()) {
          if (!aMap.Contains(Exp.Current()))
          {
            TopoDS_Edge E = TopoDS::Edge(Exp.Current());
            if (!BRepTools::IsReallyClosed(E, F) &&
                !BRep_Tool::Degenerated(E) &&
                M.FindFromKey(E).Extent() == 2)
            {
              if (aType == CHAMFER_SHAPE_FACES)
              {
                double aD1 = aCI.GetD1();
                double aD2 = aCI.GetD2();
                fill.Add(aD1, aD2, E, F);
              }
              else
              {
                double aD = aCI.GetD();
                double anAngle = aCI.GetAngle();
                if ( (anAngle > 0) && (anAngle < (M_PI/2.)) )
                  fill.AddDA(aD, anAngle, E, F);
              }
            }
          }
        }
      }
    }
  }
  else if (aType == CHAMFER_SHAPE_EDGES || aType == CHAMFER_SHAPE_EDGES_AD)
  {
    // chamfer on selected edges with lenght param D1 & D2.

    int aLen = aCI.GetLength();
    int ind = 1;
    TopTools_MapOfShape aMap;
    TopTools_IndexedDataMapOfShapeListOfShape M;
    GEOMImpl_Block6Explorer::MapShapesAndAncestors(aShapeBase, TopAbs_EDGE, TopAbs_FACE, M);
    for (; ind <= aLen; ind++)
    {
      TopoDS_Shape aShapeEdge;
      if (GEOMImpl_ILocalOperations::GetSubShape(aShapeBase, aCI.GetEdge(ind), aShapeEdge))
      {
        TopoDS_Edge E = TopoDS::Edge(aShapeEdge);
        const TopTools_ListOfShape& aFacesList = M.FindFromKey(E);
        TopoDS_Face F = TopoDS::Face( aFacesList.First() );
        if (aType == CHAMFER_SHAPE_EDGES)
        {
          double aD1 = aCI.GetD1();
          double aD2 = aCI.GetD2();
          fill.Add(aD1, aD2, E, F);
        }
        else
        {
          double aD = aCI.GetD();
          double anAngle = aCI.GetAngle();
          if ( (anAngle > 0) && (anAngle < (M_PI/2.)) )
            fill.AddDA(aD, anAngle, E, F);
        }
      }
    }
  }
  else {
  }

  fill.Build();
  if (!fill.IsDone()) {
    StdFail_NotDone::Raise("Chamfer can not be computed on the given shape with the given parameters");
  }
  aShape = fill.Shape();

  if (aShape.IsNull()) return 0;

  // reduce tolerances
  ShapeFix_ShapeTolerance aSFT;
  aSFT.LimitTolerance(aShape, Precision::Confusion(),
                      Precision::Confusion(), TopAbs_SHAPE);
  Handle(ShapeFix_Shape) aSfs = new ShapeFix_Shape(aShape);
  aSfs->Perform();
  aShape = aSfs->Shape();

  // fix SameParameter flag
  BRepLib::SameParameter(aShape, 1.E-5, Standard_True);

  aFunction->SetValue(aShape);

  log.SetTouched(Label());

  return 1;
}


//=======================================================================
//function :  GEOMImpl_ChamferDriver_Type_
//purpose  :
//=======================================================================
Standard_EXPORT Handle_Standard_Type& GEOMImpl_ChamferDriver_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_ChamferDriver",
                                                         sizeof(GEOMImpl_ChamferDriver),
                                                         1,
                                                         (Standard_Address)_Ancestors,
                                                         (Standard_Address)NULL);

  return _aType;
}

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

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

  return _anOtherObject;
}