//  SMESH SMESHGUI : GUI for SMESH component
//
//  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
//  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
//
//
//  File   : SMESHGUI_ShapeByMeshDlg.cxx
//  Author : Edward AGAPOV
//  Module : SMESH

#include "SMESHGUI_ShapeByMeshDlg.h"

#include "SMESHGUI.h"
#include "SMESHGUI_GEOMGenUtils.h"
#include "SMESHGUI_IdValidator.h"
#include "SMESHGUI_MeshUtils.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_VTKUtils.h"

#include "SMDS_Mesh.hxx"
#include "SMDS_MeshNode.hxx"
#include "SMESH_Actor.h"

#include "GEOMBase.h"
#include "GeometryGUI.h"

#include "LightApp_DataOwner.h"
#include "LightApp_SelectionMgr.h"
#include "SALOMEDSClient_SObject.hxx"
#include "SALOME_ListIO.hxx"
#include "SUIT_Desktop.h"
#include "SVTK_Selector.h"
#include "SVTK_ViewWindow.h"
#include "SVTK_ViewModel.h"
#include "SalomeApp_Tools.h"

// OCCT Includes
#include <TColStd_MapOfInteger.hxx>
#include <TopoDS_Shape.hxx>
#include <TopExp_Explorer.hxx>

// QT Includes
#include <qframe.h>
#include <qlayout.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qlabel.h>
#include <qradiobutton.h>
#include <qbuttongroup.h>
#include <qapplication.h>
#include <qstringlist.h>

#define SPACING 5
#define MARGIN  10


enum { EDGE = 0, FACE, VOLUME };

/*!
 * \brief Dialog to publish a sub-shape of the mesh main shape
 *        by selecting mesh elements
 */
SMESHGUI_ShapeByMeshDlg::SMESHGUI_ShapeByMeshDlg()
  : SMESHGUI_Dialog( 0, false, true, OK | Close )
{
  setCaption(tr("CAPTION"));

  QVBoxLayout* aDlgLay = new QVBoxLayout (mainFrame(), MARGIN, SPACING);

  QFrame* aMainFrame = createMainFrame  (mainFrame());

  aDlgLay->addWidget(aMainFrame);

  aDlgLay->setStretchFactor(aMainFrame, 1);
}

//=======================================================================
// function : createMainFrame()
// purpose  : Create frame containing dialog's input fields
//=======================================================================
QFrame* SMESHGUI_ShapeByMeshDlg::createMainFrame (QWidget* theParent)
{
  QFrame* aMainGrp = new QFrame(theParent, "main frame");
  QGridLayout* aLayout = new QGridLayout(aMainGrp, 3, 2);
  aLayout->setSpacing(6);
  aLayout->setAutoAdd(false);

  // elem type
  myElemTypeGroup = new QButtonGroup(1, Qt::Vertical, aMainGrp, "Group types");
  myElemTypeGroup->setTitle(tr("SMESH_ELEMENT_TYPE"));
  myElemTypeGroup->setExclusive(true);

  (new QRadioButton( tr("SMESH_EDGE")  , myElemTypeGroup))->setChecked(true);
  new QRadioButton( tr("SMESH_FACE")  , myElemTypeGroup);
  new QRadioButton( tr("SMESH_VOLUME"), myElemTypeGroup);

  // element id
  QLabel* anIdLabel = new QLabel( aMainGrp, "element id label");
  anIdLabel->setText( tr("ELEMENT_ID") );
  myElementId = new QLineEdit( aMainGrp, "element id");
  if (!myIsMultipleAllowed)
    myElementId->setValidator( new SMESHGUI_IdValidator( theParent, "id validator", 1 ));
  else
    myElementId->setValidator( new SMESHGUI_IdValidator( theParent, "id validator" ));

  // shape name
  QLabel* aNameLabel = new QLabel( aMainGrp, "geom name label");
  aNameLabel->setText( tr("GEOMETRY_NAME") );
  myGeomName = new QLineEdit( aMainGrp, "geom name");

  aLayout->addMultiCellWidget(myElemTypeGroup, 0, 0, 0, 1);
  aLayout->addWidget(anIdLabel,   1, 0);
  aLayout->addWidget(myElementId, 1, 1);
  aLayout->addWidget(aNameLabel,  2, 0);
  aLayout->addWidget(myGeomName,  2, 1);

  return aMainGrp;
}

//=======================================================================
// function : ~SMESHGUI_ShapeByMeshDlg()
// purpose  : Destructor
//=======================================================================
SMESHGUI_ShapeByMeshDlg::~SMESHGUI_ShapeByMeshDlg()
{
  // no need to delete child widgets, Qt does it all for us
}

//================================================================================
/*!
 * \brief Constructor
*/
//================================================================================
SMESHGUI_ShapeByMeshOp::SMESHGUI_ShapeByMeshOp(bool isMultipleAllowed):
  myIsMultipleAllowed(isMultipleAllowed)
{
  if ( GeometryGUI::GetGeomGen()->_is_nil() )// check that GEOM_Gen exists
    GeometryGUI::InitGeomGen();

  myDlg = new SMESHGUI_ShapeByMeshDlg;
  myDlg->setMultipleAllowed(myIsMultipleAllowed);

  connect(myDlg->myElemTypeGroup, SIGNAL(clicked(int)), SLOT(onTypeChanged(int)));
  connect(myDlg->myElementId, SIGNAL(textChanged(const QString&)), SLOT(onElemIdChanged(const QString&)));
}


//=======================================================================
// function : startOperation()
// purpose  : Init dialog fields, connect signals and slots, show dialog
//=======================================================================
void SMESHGUI_ShapeByMeshOp::startOperation()
{
  //SetMesh( SMESH::SMESH_Mesh::_nil() );
  myIsManualIdEnter = false;

  SMESHGUI_SelectionOp::startOperation();

  //activateSelection(); // set filters
  onSelectionDone(); // desable/enable [ OK ]

  myDlg->show();
}

//================================================================================
/*!
 * \brief Destructor
*/
//================================================================================
SMESHGUI_ShapeByMeshOp::~SMESHGUI_ShapeByMeshOp()
{
  if ( myDlg )
    delete myDlg;
}

//================================================================================
/*!
 * \brief Gets dialog of this operation
  * \retval LightApp_Dialog* - pointer to dialog of this operation
*/
//================================================================================
LightApp_Dialog* SMESHGUI_ShapeByMeshOp::dlg() const
{
  return myDlg;
}

//=======================================================================
// function : GetShape()
// purpose  : Get published sub-shape
//=======================================================================
GEOM::GEOM_Object_ptr SMESHGUI_ShapeByMeshOp::GetShape()
{
  return myGeomObj.in();
}

//=======================================================================
// function : SetMesh()
// purpose  : Set mesh to dialog
//=======================================================================

void SMESHGUI_ShapeByMeshOp::SetMesh (SMESH::SMESH_Mesh_ptr thePtr)
{
  myMesh    = SMESH::SMESH_Mesh::_duplicate(thePtr);
  myGeomObj = GEOM::GEOM_Object::_nil();
  myHasSolids = false;

  vector< bool > hasElement (myDlg->myElemTypeGroup->count(), false);
  if (!myMesh->_is_nil() )
  {
//     _PTR(SObject) aSobj = SMESH::FindSObject(myMesh.in());
//     SUIT_DataOwnerPtr anIObj (new LightApp_DataOwner(aSobj->GetID().c_str()));

    vector< int > nbShapes( TopAbs_SHAPE, 0 );
    int shapeDim = 0; // max dim with several shapes
    //if ( /*mySelectionMgr*/ selectionMgr()->isOk(anIObj) ) // check that the mesh has a valid shape
    {
      _PTR(SObject) aSO = SMESH::FindSObject(myMesh.in());
      GEOM::GEOM_Object_var mainShape = SMESH::GetGeom(aSO);
      if ( !mainShape->_is_nil() ) 
      {
        TopoDS_Shape aShape;
        if ( GEOMBase::GetShape(mainShape, aShape))
        {
          TopAbs_ShapeEnum types[4] = { TopAbs_EDGE, TopAbs_FACE, TopAbs_SHELL, TopAbs_SOLID };
          for ( int dim = 4; dim > 0; --dim ) {
            TopAbs_ShapeEnum type = types[ dim - 1 ];
            TopAbs_ShapeEnum avoid = ( type == TopAbs_SHELL ) ? TopAbs_SOLID : TopAbs_SHAPE;
            TopExp_Explorer exp( aShape, type, avoid );
            for ( ; nbShapes[ type ] < 2 && exp.More(); exp.Next() )
              ++nbShapes[ type ];
            if ( nbShapes[ type ] > 1 ) {
              shapeDim = dim;
              break;
            }
          }
        }
      }
    }
    if (shapeDim > 0)
    {
      if ( nbShapes[ TopAbs_SHELL ] + nbShapes[ TopAbs_SOLID ] > 1 )
        shapeDim = 3;
      hasElement[ EDGE ]   = shapeDim > 0 && myMesh->NbEdges()  ;
      hasElement[ FACE ]   = shapeDim > 1 && myMesh->NbFaces()  ;
      hasElement[ VOLUME ] = shapeDim > 2 && myMesh->NbVolumes();
    }
    myHasSolids = nbShapes[ TopAbs_SOLID ];
  }

  // disable inexistant elem types
  for ( int i = 0; i < myDlg->myElemTypeGroup->count(); ++i ) {
    if ( QButton* button = myDlg->myElemTypeGroup->find( i ) )
      button->setEnabled( hasElement[ i ] );
  }
  myDlg->myElementId->setEnabled( hasElement[ EDGE ] );
  myDlg->myGeomName-> setEnabled( hasElement[ EDGE ] );

  setElementID("");
}

//=======================================================================
// function : commitOperation()
// purpose  : called when "Ok" button pressed.
//=======================================================================

void SMESHGUI_ShapeByMeshOp::commitOperation()
{
  SMESHGUI_SelectionOp::commitOperation();
  try {
    QStringList aListId = QStringList::split( " ", myDlg->myElementId->text(), false);
    if (aListId.count() == 1)
      {
	int elemID = (aListId.first()).toInt();
	myGeomObj = SMESHGUI::GetSMESHGen()->GetGeometryByMeshElement
	  ( myMesh.in(), elemID, myDlg->myGeomName->text().latin1());
      }
    else
      {
	GEOM::GEOM_Gen_var geomGen = SMESH::GetGEOMGen();
	_PTR(Study) aStudy = SMESH::GetActiveStudyDocument();
	
	if (geomGen->_is_nil() || !aStudy)
	  return;
	
	GEOM::GEOM_IShapesOperations_var aShapesOp =
	  geomGen->GetIShapesOperations(aStudy->StudyId());
	if (aShapesOp->_is_nil() )
	  return;
	
	TopAbs_ShapeEnum aGroupType = TopAbs_SHAPE;
	
	std::map<double, GEOM::GEOM_Object_var> aGeomObjectsMap;
	GEOM::GEOM_Object_var aGeomObject;

	GEOM::GEOM_Object_var aMeshShape = myMesh->GetShapeToMesh();
	
	for ( int i = 0; i < aListId.count(); i++ )
	  {
	    aGeomObject =
	      SMESHGUI::GetSMESHGen()->FindGeometryByMeshElement(myMesh.in(), aListId[i].toInt());

	    if (aGeomObject->_is_nil()) continue;
	    
	    double anId = aShapesOp->GetSubShapeIndex(aMeshShape, aGeomObject);
	    if (aShapesOp->IsDone() && aGeomObjectsMap.find(anId) == aGeomObjectsMap.end())
	      {
		aGeomObjectsMap[anId] = aGeomObject;

		TopAbs_ShapeEnum aSubShapeType = (TopAbs_ShapeEnum)aGeomObject->GetShapeType();
		if (i == 0)
		  aGroupType = aSubShapeType;
		else if (aSubShapeType != aGroupType)
		  aGroupType = TopAbs_SHAPE;
	      }
	  }
	
	int aNumberOfGO = aGeomObjectsMap.size();
	if (aNumberOfGO == 1)
	  myGeomObj = (*aGeomObjectsMap.begin()).second;
	else if (aNumberOfGO > 1)
	  {
	    GEOM::GEOM_IGroupOperations_var aGroupOp =
	      geomGen->GetIGroupOperations(aStudy->StudyId());
	    if(aGroupOp->_is_nil())
	      return;
	    
	    GEOM::ListOfGO_var aGeomObjects = new GEOM::ListOfGO();
	    aGeomObjects->length( aNumberOfGO );

	    int i = 0;
	    std::map<double, GEOM::GEOM_Object_var>::iterator anIter;
	    for (anIter = aGeomObjectsMap.begin(); anIter!=aGeomObjectsMap.end(); anIter++)
	      aGeomObjects[i++] = (*anIter).second;
	  
	    //create geometry group
	    myGeomObj = aGroupOp->CreateGroup(aMeshShape, aGroupType);
	    aGroupOp->UnionList(myGeomObj, aGeomObjects);

	    if (!aGroupOp->IsDone())
	      return;
	  }
	
	// publish the GEOM object in study
	QString aNewGeomGroupName ( myDlg->myGeomName->text().latin1() );
	  
	SALOMEDS::SObject_var aNewGroupSO =
	  geomGen->AddInStudy(SMESHGUI::GetSMESHGen()->GetCurrentStudy(), myGeomObj, aNewGeomGroupName, aMeshShape);
      }
  }
  catch (const SALOME::SALOME_Exception& S_ex) {
    SalomeApp_Tools::QtCatchCorbaException(S_ex);
  }
  catch (...) {
  }

}

//=======================================================================
// function : onSelectionDone()
// purpose  : SLOT called when selection changed. Enable/desable [ OK ]
//=======================================================================
void SMESHGUI_ShapeByMeshOp::onSelectionDone()
{
  myDlg->setButtonEnabled( false, QtxDialog::OK );
  setElementID("");

  try {
    SALOME_ListIO aList;
    selectionMgr()->selectedObjects(aList, SVTK_Viewer::Type());
    if (!myIsMultipleAllowed && aList.Extent() != 1)
      return;

    SMESH::SMESH_Mesh_var aMesh = SMESH::GetMeshByIO(aList.First());
    if (aMesh->_is_nil() || myMesh->_is_nil() || aMesh->GetId() != myMesh->GetId() )
      return;

    QString aString;
    int nbElems = SMESH::GetNameOfSelectedElements(selector(),//myViewWindow->GetSelector(),
                                                   aList.First(), aString);
    if (nbElems > 0) {
      if (!myIsMultipleAllowed && nbElems != 1 )
	return;
      setElementID( aString );
      myDlg->setButtonEnabled( true, QtxDialog::OK );
    }
  } catch (...) {
  }
}

//=======================================================================
// function : activateSelection()
// purpose  : Activate selection in accordance with current pattern type
//=======================================================================
void SMESHGUI_ShapeByMeshOp::activateSelection()
{
  selectionMgr()->clearFilters();
  //SMESH::SetPointRepresentation(false);

  myDlg->myGeomName->setText("");

  QString geomName;
  Selection_Mode mode = EdgeSelection;
  switch ( myDlg->myElemTypeGroup->id( myDlg->myElemTypeGroup->selected() )) {
  case EDGE  :
    mode = EdgeSelection;   geomName = tr("GEOM_EDGE"); break;
  case FACE  :
    mode = FaceSelection;   geomName = tr("GEOM_FACE"); break;
  case VOLUME:
    mode = VolumeSelection; geomName = tr(myHasSolids ? "GEOM_SOLID" : "GEOM_SHELL"); break;
  default: return;
  }
  if ( selectionMode() != mode )
    setSelectionMode( mode );

  myDlg->myGeomName->setText( GEOMBase::GetDefaultName( geomName ));
}

//=======================================================================
//function : onTypeChanged
//purpose  : SLOT. Called when element type changed.
//=======================================================================

void SMESHGUI_ShapeByMeshOp::onTypeChanged (int theType)
{
  setElementID("");
  activateSelection();
}

//=======================================================================
//function : onTypeChanged
//purpose  : SLOT. Called when element id is entered
//           Highlight the element whose Ids the user entered manually
//=======================================================================

void SMESHGUI_ShapeByMeshOp::onElemIdChanged(const QString& theNewText)
{
  myDlg->setButtonEnabled( false, QtxDialog::OK );

  if ( myIsManualIdEnter && !myMesh->_is_nil() )
    if ( SMESH_Actor* actor = SMESH::FindActorByObject(myMesh) )
      if ( SMDS_Mesh* aMesh = actor->GetObject()->GetMesh() )
      {
        SMDSAbs_ElementType type = SMDSAbs_Edge;
        switch ( myDlg->myElemTypeGroup->id( myDlg->myElemTypeGroup->selected() )) {
        case EDGE  : type = SMDSAbs_Edge;   break;
        case FACE  : type = SMDSAbs_Face;   break;
        case VOLUME: type = SMDSAbs_Volume; break;
        default: return;
        }
        TColStd_MapOfInteger newIndices;
        QStringList aListId = QStringList::split( " ", theNewText, false);
        for ( int i = 0; i < aListId.count(); i++ ) {
          if ( const SMDS_MeshElement * e = aMesh->FindElement( aListId[ i ].toInt() ))
            if ( e->GetType() == type )
              newIndices.Add( e->GetID() );
        }

	if ( !newIndices.IsEmpty() )
	  {
	    if (!myIsMultipleAllowed && newIndices.Extent() != 1)
	      return;
	    if ( SVTK_Selector* s = selector() ) {
	      s->AddOrRemoveIndex( actor->getIO(), newIndices, false );
	      viewWindow()->highlight( actor->getIO(), true, true );
	      myDlg->setButtonEnabled( true, QtxDialog::OK );
	    }
	  }
      }
}

//=======================================================================
//function : setElementID
//purpose  : programmatically set element id
//=======================================================================

void SMESHGUI_ShapeByMeshOp::setElementID(const QString& theText)
{
  myIsManualIdEnter = false;
  myDlg->myElementId->setText(theText);
  myIsManualIdEnter = true;
}