// Created on: 1998-06-04
// Created by: Jean Yves LEBEY
// Copyright (c) 1998-1999 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 <TopOpeBRepDS_TKI.hxx>
#include <stdlib.h>
#include <TopOpeBRep_define.hxx>
#include <TopOpeBRepDS_CurvePointInterference.hxx>

typedef TopOpeBRepDS_ListOfInterference* BOA_t;

static int compll(const void* v1, const void* v2) {
  BOA_t l1 = *(BOA_t*)v1;
  BOA_t l2 = *(BOA_t*)v2;
  if      (l1->Extent() == 0) return (0);
  else if (l2->Extent() == 0) return (0);

  Handle(TopOpeBRepDS_CurvePointInterference) i1 = Handle(TopOpeBRepDS_CurvePointInterference)::DownCast(l1->First());
  if (i1.IsNull())
    return 0;
  Handle(TopOpeBRepDS_CurvePointInterference) i2 = Handle(TopOpeBRepDS_CurvePointInterference)::DownCast(l2->First());
  if (i2.IsNull())
    return 0;
  Standard_Real p1 = i1->Parameter();
  Standard_Real p2 = i2->Parameter();
  if      (p1 < p2) return (-1);
  else if (p1 > p2) return (1);
  return 0;
}
     
static void BREP_sortonparameter2(TopOpeBRepDS_ListOfInterference& LOI)
{
  TopOpeBRepDS_TKI tki;
  tki.FillOnGeometry(LOI);
  Standard_Integer ng=0;
  for(tki.Init();tki.More();tki.Next())
    ng++;
  size_t sng=(size_t)ng;
  size_t sad=sizeof(BOA_t);
  BOA_t* T = (BOA_t*)Standard::Allocate (sng*sad);
  TopOpeBRepDS_Kind K;
  Standard_Integer G, j=0;
  for(tki.Init();tki.More();tki.Next(),j++)
    T[j]= &(tki.ChangeValue(K,G));
  qsort(T,sng,sad,compll);
  LOI.Clear();
  for(j=0;j<ng;j++)
  {
    TopOpeBRepDS_ListOfInterference& l=*T[j];
    LOI.Append(l);
  }
  Standard::Free(T);
}

Standard_EXPORT void BREP_sortonparameter(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer i=1, n=HDS->NbShapes();
  for (; i<=n; i++) {
    const TopoDS_Shape& s = HDS->Shape(i);
    if (s.ShapeType() != TopAbs_EDGE) continue;
    TopOpeBRepDS_ListOfInterference& LOI = BDS.ChangeShapeInterferences(s);
    BREP_sortonparameter2(LOI);
  }
}