// Created on: 2017-06-16
// Created by: Natalia ERMOLAEVA
// Copyright (c) 2017 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 <inspector/VInspector_ItemContext.hxx>

#include <AIS_ListOfInteractive.hxx>
#include <SelectMgr_EntityOwner.hxx>
#include <inspector/VInspector_ItemFolderObject.hxx>
#include <inspector/VInspector_ItemPresentableObject.hxx>
#include <inspector/VInspector_Tools.hxx>

#include <Standard_WarningsDisable.hxx>
#include <QStringList>
#include <Standard_WarningsRestore.hxx>

//#define DEBUG_FREE_OWNERS

// =======================================================================
// function : initRowCount
// purpose :
// =======================================================================
int VInspector_ItemContext::initRowCount() const
{
  if (Column() != 0)
    return 0;

  int aNbProperties = 1; // item to visualize Filters/Drawer information of context

  int aNbPresentations = 0;
  Handle(AIS_InteractiveContext) aContext = GetContext();
  if (aContext.IsNull())
    return 0;

  AIS_ListOfInteractive aListOfIO;
  aContext->DisplayedObjects (aListOfIO);
  aContext->ErasedObjects(aListOfIO);
  aNbPresentations = aListOfIO.Extent();

  // owners without Presentation
#ifdef DEBUG_FREE_OWNERS
  int aRows = 0;
  // only local context is processed: TODO for global context
  NCollection_List<Handle(SelectMgr_EntityOwner)> anActiveOwners;
  aContext->MainSelector()->ActiveOwners(anActiveOwners);

  Handle(SelectMgr_EntityOwner) anOwner;
  for (NCollection_List<Handle(SelectMgr_EntityOwner)>::Iterator anOwnersIt(anActiveOwners); anOwnersIt.More(); anOwnersIt.Next())
  {
    anOwner = anOwnersIt.Value();
    if (anOwner.IsNull())
      continue;
    Handle(AIS_InteractiveObject) anAISObj = Handle(AIS_InteractiveObject)::DownCast(anOwner->Selectable());
    if (anAISObj.IsNull())
      aRows++;
  }
  // owners in Global Context
  NCollection_List<Handle(SelectMgr_EntityOwner)> anActiveOwners;
  aContext->MainSelector()->ActiveOwners(anActiveOwners);
  if (aRows > 0)
    aNbPresentations += aRows;
  NCollection_List<Handle(SelectMgr_EntityOwner)> anEmptySelectableOwners;
  NCollection_List<Handle(SelectMgr_EntityOwner)> anOwners =
    VInspector_Tools::ActiveOwners (aContext, anEmptySelectableOwners);
  if (anEmptySelectableOwners.Size() > 0)
    aNbPresentations += 1;
#endif
  return aNbProperties + aNbPresentations;
}

// =======================================================================
// function : initValue
// purpose :
// =======================================================================
QVariant VInspector_ItemContext::initValue (const int theItemRole) const
{
  if (theItemRole != Qt::DisplayRole && theItemRole != Qt::EditRole && theItemRole != Qt::ToolTipRole)
    return QVariant();

  if (GetContext().IsNull())
    return Column() == 0 ? "Empty context" : "";

  switch (Column())
  {
    case 0: return GetContext()->DynamicType()->Name();
    case 1: return rowCount();
    case 4:
    {
      Handle(AIS_InteractiveObject) anEmptyIO;
      int aSelectedCount = VInspector_Tools::SelectedOwners (GetContext(), anEmptyIO, false);
      return aSelectedCount > 0 ? QString::number (aSelectedCount) : "";
    }
    case 6: return GetContext()->DeviationCoefficient();
    default:
      break;
  }
  return QVariant();
}

// =======================================================================
// function : createChild
// purpose :
// =======================================================================
TreeModel_ItemBasePtr VInspector_ItemContext::createChild (int theRow, int theColumn)
{
  if (theRow == 0)
    return VInspector_ItemFolderObject::CreateItem (currentItem(), theRow, theColumn);
  else
    return VInspector_ItemPresentableObject::CreateItem (currentItem(), theRow, theColumn);
}