// Created on: 1999-02-11
// Created by: Pavel DURANDIN
// Copyright (c) 1999-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <Interface_EntityIterator.hxx>
#include <Interface_Graph.hxx>
#include <Standard_Transient.hxx>
#include <Standard_Type.hxx>
#include <StepGeom_Surface.hxx>
#include <STEPSelections_SelectFaces.hxx>
#include <StepShape_FaceSurface.hxx>
#include <StepShape_GeometricSet.hxx>
#include <TCollection_AsciiString.hxx>

IMPLEMENT_STANDARD_RTTIEXT(STEPSelections_SelectFaces, IFSelect_SelectExplore)

STEPSelections_SelectFaces::STEPSelections_SelectFaces()
    : IFSelect_SelectExplore(-1)
{
}

bool STEPSelections_SelectFaces::Explore(const int /*level*/,
                                         const occ::handle<Standard_Transient>& start,
                                         const Interface_Graph&                 G,
                                         Interface_EntityIterator&              explored) const
{
  if (start.IsNull())
  {
    return false;
  }

  if (start->IsKind(STANDARD_TYPE(StepShape_FaceSurface)))
  {
    return true;
  }

  bool isInFaceOfInSurface = false;
  if (start->IsKind(STANDARD_TYPE(StepGeom_Surface)))
  {
    Interface_EntityIterator subs = G.Sharings(start);
    for (subs.Start(); subs.More(); subs.Next())
    {
      if (subs.Value()->IsKind(STANDARD_TYPE(StepShape_GeometricSet)))
      {
        return true;
      }
      if (subs.Value()->IsKind(STANDARD_TYPE(StepGeom_Surface)))
      {
        isInFaceOfInSurface = true;
      }
      if (subs.Value()->IsKind(STANDARD_TYPE(StepShape_FaceSurface)))
      {
        isInFaceOfInSurface = true;
      }
    }
    return !isInFaceOfInSurface;
  }
  Interface_EntityIterator subs = G.Shareds(start);
  subs.Start();
  bool isSome = subs.More();
  for (; subs.More(); subs.Next())
  {
    explored.AddItem(subs.Value());
  }

  return isSome;
}

TCollection_AsciiString STEPSelections_SelectFaces::ExploreLabel() const
{
  return TCollection_AsciiString("Faces");
}
