// 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/DFBrowser_Item.hxx>

#include <inspector/DFBrowser_ItemRole.hxx>
#include <inspector/DFBrowser_Module.hxx>
#include <inspector/DFBrowser_Tools.hxx>

#include <inspector/DFBrowserPane_AttributePane.hxx>
#include <inspector/DFBrowserPane_ItemRole.hxx>
#include <inspector/DFBrowserPane_Tools.hxx>

#include <TDF_AttributeIterator.hxx>
#include <TDF_ChildIterator.hxx>

#include <Standard_WarningsDisable.hxx>
#include <QIcon>
#include <QObject>
#include <Standard_WarningsRestore.hxx>

#define USE_DUMPJSON

// =======================================================================
// function : hasAttribute
// purpose :
// =======================================================================
bool DFBrowser_Item::HasAttribute() const
{
  initItem();
  return myAttributeGUID != Standard_GUID();
}

// =======================================================================
// function : getAttribute
// purpose :
// =======================================================================
Handle(TDF_Attribute) DFBrowser_Item::GetAttribute() const
{
  initItem();
  Handle(TDF_Attribute) anAttribute;
  GetLabel().FindAttribute (myAttributeGUID, anAttribute);
  return anAttribute;
}

// =======================================================================
// function : Init
// purpose :
// =======================================================================
void DFBrowser_Item::Init()
{
  DFBrowser_ItemBasePtr aParentItem = itemDynamicCast<DFBrowser_ItemBase> (Parent());
  if (!aParentItem)
    return;
  TDF_Label aParentLabel = aParentItem->GetLabel();
  // items can exist only by items with not empty label
  if (aParentLabel.IsNull())
    return;

  int aNbAttributes = aParentLabel.NbAttributes();
  int aRowId = Row();
  if (aRowId < aNbAttributes)
  {
    Handle(TDF_Attribute) anAttribute;
    int anAttributeId = 0;
    for (TDF_AttributeIterator anAttrIt (aParentLabel); anAttrIt.More(); anAttrIt.Next(), anAttributeId++)
    {
      if (anAttributeId != aRowId)
      {
        continue;
      }
      anAttribute = anAttrIt.Value();
      break;
    }
    SetAttribute (anAttribute);
  }
  else {
    int aCurrentId = aRowId - aNbAttributes;
    aParentItem->InitChildLabels (aRowId, aCurrentId);
  }
  TreeModel_ItemBase::Init();
}

// =======================================================================
// function : reset
// purpose :
// =======================================================================
void DFBrowser_Item::Reset()
{
  SetAttribute (Handle(TDF_Attribute)());

  DFBrowser_ItemBase::Reset();
}

// =======================================================================
// function : initRowCount
// purpose :
// =======================================================================
int DFBrowser_Item::initRowCount() const
{
  return HasAttribute() ? 0 : DFBrowser_ItemBase::initRowCount();
}

// =======================================================================
// function : initValue
// purpose :
// =======================================================================
QVariant DFBrowser_Item::initValue (const int theRole) const
{
  if (!HasAttribute())
  {
    // label item
    return DFBrowser_ItemBase::initValue (theRole);
  }
  else
  {
    // attribute item
    switch (theRole)
    {
      case Qt::DisplayRole:
      case Qt::ToolTipRole:
      case Qt::DecorationRole:
      case Qt::ForegroundRole:
      case DFBrowserPane_ItemRole_DisplayShort:
      case DFBrowser_ItemRole_AdditionalInfo:
      {
        if (Column() == 0)
          return DFBrowser_Module::GetAttributeInfo (GetAttribute(), GetModule(), theRole, Column());
        else
          return QVariant();
      }
      case DFBrowserPane_ItemRole_DisplayExtended:
      case DFBrowserPane_ItemRole_ToolTipExtended:
      {
        int aRole = theRole == DFBrowserPane_ItemRole_DisplayExtended ? Qt::DisplayRole : Qt::ToolTipRole;
        QVariant aValue = DFBrowser_Module::GetAttributeInfo (GetAttribute(), GetModule(), aRole, Column());
        QString anAdditionalInfo = DFBrowser_Module::GetAttributeInfo (GetAttribute(), GetModule(),
                                                                        DFBrowser_ItemRole_AdditionalInfo, Column()).toString();
        if (!anAdditionalInfo.isEmpty())
        {
          if (theRole == DFBrowserPane_ItemRole_DisplayExtended)
            anAdditionalInfo = TreeModel_Tools::CutString (anAdditionalInfo);
          if (!anAdditionalInfo.isEmpty())
            aValue = QVariant (aValue.toString() + QString (" [%1]").arg (anAdditionalInfo));
          //if (aRole == Qt::ToolTipRole)
          //  aValue = wrapTextByWords(aValue.toString().toStdString(), INFO_LENGHT).c_str();
        }
        return aValue;
      }
      default:
        break;
    }
  }
  return QVariant();
}

// =======================================================================
// function : initStream
// purpose :
// =======================================================================
void DFBrowser_Item::initStream (Standard_OStream& theOStream) const
{
  if (!HasAttribute())
    return;

#ifdef USE_DUMPJSON
  Handle(TDF_Attribute) anAttribute = GetAttribute();
  if (!anAttribute.IsNull())
  {
    anAttribute->DumpJson (theOStream);
  }
#else
  (void)theOStream;
#endif
}

// =======================================================================
// function : GetAttributeInfo
// purpose :
// =======================================================================
QVariant DFBrowser_Item::GetAttributeInfo (int theRole) const
{
  initItem();
  return cachedValue (theRole);
}

// =======================================================================
// function : initItem
// purpose :
// =======================================================================
void DFBrowser_Item::initItem() const
{
  if (IsInitialized())
    return;
  
  const_cast<DFBrowser_Item*>(this)->Init();
}

// =======================================================================
// function : SetAttribute
// purpose :
// =======================================================================
void DFBrowser_Item::SetAttribute (Handle(TDF_Attribute) theAttribute)
{
  if (!theAttribute.IsNull())
  {
    setLabel (theAttribute->Label());
    myAttributeGUID = theAttribute->ID();
  }
  else
  {
    setLabel (TDF_Label());
    myAttributeGUID = Standard_GUID();
  }
}