// Created on: 2008-01-23
// Created by: Sergey ZARITCHNY
// Copyright (c) 2008-2014 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 <TDataStd_DeltaOnModificationOfIntPackedMap.hxx>

#include <Standard_Type.hxx>
#include <TDataStd_IntPackedMap.hxx>
#include <TDF_DeltaOnModification.hxx>
#include <TDF_Label.hxx>

IMPLEMENT_STANDARD_RTTIEXT(TDataStd_DeltaOnModificationOfIntPackedMap, TDF_DeltaOnModification)

#ifdef OCCT_DEBUG
  #define MAXUP 1000
#endif

//=================================================================================================

TDataStd_DeltaOnModificationOfIntPackedMap::TDataStd_DeltaOnModificationOfIntPackedMap(
  const occ::handle<TDataStd_IntPackedMap>& OldAtt)
    : TDF_DeltaOnModification(OldAtt)
{
  occ::handle<TDataStd_IntPackedMap> CurrAtt;
  if (Label().FindAttribute(OldAtt->ID(), CurrAtt))
  {
    occ::handle<TColStd_HPackedMapOfInteger> aMap1, aMap2;
    aMap1 = OldAtt->GetHMap();
    aMap2 = CurrAtt->GetHMap();
#ifdef OCCT_DEBUG_disable
    if (aMap1.IsNull())
      std::cout << "DeltaOnModificationOfIntPackedMap:: Old Map is Null" << std::endl;
    if (aMap2.IsNull())
      std::cout << "DeltaOnModificationOfIntPackedMap:: Current Map is Null" << std::endl;
#endif

    if (aMap1.IsNull() || aMap2.IsNull())
    {
      return;
    }
    if (aMap1 != aMap2)
    {
      const TColStd_PackedMapOfInteger& map1 = aMap1->Map();
      const TColStd_PackedMapOfInteger& map2 = aMap2->Map();
      if (NCollection_PackedMapAlgo::IsSubset(map1, map2))
      {
        myDeletion = new TColStd_HPackedMapOfInteger();
        NCollection_PackedMapAlgo::Subtraction(myDeletion->ChangeMap(), map2, map1);
      }
      else if (NCollection_PackedMapAlgo::IsSubset(map2, map1))
      {
        myAddition = new TColStd_HPackedMapOfInteger();
        NCollection_PackedMapAlgo::Subtraction(myAddition->ChangeMap(), map1, map2);
      }
      else if (NCollection_PackedMapAlgo::HasIntersection(map1, map2))
      {
        myAddition = new TColStd_HPackedMapOfInteger();
        NCollection_PackedMapAlgo::Subtraction(myAddition->ChangeMap(), map1, map2);
        myDeletion = new TColStd_HPackedMapOfInteger();
        NCollection_PackedMapAlgo::Subtraction(myDeletion->ChangeMap(), map2, map1);
      }
      else
      {
        myAddition = new TColStd_HPackedMapOfInteger(map1);
        myDeletion = new TColStd_HPackedMapOfInteger(map2);
      }
    }
  }
}

//=================================================================================================

void TDataStd_DeltaOnModificationOfIntPackedMap::Apply()
{

  occ::handle<TDF_Attribute>         aTDFAttribute = Attribute();
  occ::handle<TDataStd_IntPackedMap> aBackAtt =
    occ::down_cast<TDataStd_IntPackedMap>(aTDFAttribute);
  if (aBackAtt.IsNull())
  {
#ifdef OCCT_DEBUG
    std::cout << "DeltaOnModificationOfIntPAckedMap::Apply: OldAtt is Null" << std::endl;
#endif
    return;
  }

  occ::handle<TDataStd_IntPackedMap> aCurAtt;
  if (!Label().FindAttribute(aBackAtt->ID(), aCurAtt))
  {

    Label().AddAttribute(aBackAtt);
  }

  if (aCurAtt.IsNull())
  {
#ifdef OCCT_DEBUG
    std::cout << "DeltaOnModificationOfIntAPckedMAp::Apply: CurAtt is Null" << std::endl;
#endif
    return;
  }
  else
  {
    aCurAtt->Backup();
  }

  occ::handle<TColStd_HPackedMapOfInteger> IntMap = aCurAtt->GetHMap();
  if (IntMap.IsNull())
  {
    return;
  }

  if (myDeletion.IsNull() && myAddition.IsNull())
  {
    return;
  }

  if (!myDeletion.IsNull())
  {
    if (myDeletion->Map().Extent())
    {
      NCollection_PackedMapAlgo::Subtract(IntMap->ChangeMap(), myDeletion->Map());
    }
  }
  if (!myAddition.IsNull())
  {
    if (myAddition->Map().Extent())
    {
      NCollection_PackedMapAlgo::Unite(IntMap->ChangeMap(), myAddition->Map());
    }
  }

#ifdef OCCT_DEBUG_disable
  std::cout << " << Map Dump after Delta Apply >>" << std::endl;
  occ::handle<TColStd_HPackedMapOfInteger> aIntMap = aCurAtt->GetHMap();
  TColStd_PackedMapOfInteger::Iterator     it(aIntMap->Map());
  for (int i = 1; it.More() && i <= MAXUP; it.Next(), i++)
    std::cout << it.Key() << "  ";
  std::cout << std::endl;
#endif
}
