//  SMESH SMESH : implementaion of SMESH idl descriptions
//
//  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.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
//
//
//
//  File   : SMESH_subMesh.hxx
//  Author : Paul RASCLE, EDF
//  Module : SMESH
//  $Header$

#ifndef _SMESH_SUBMESH_HXX_
#define _SMESH_SUBMESH_HXX_

#include "SMESHDS_Mesh.hxx"
#include "SMESHDS_SubMesh.hxx"
#include "SMESH_Hypothesis.hxx"
#include "Utils_SALOME_Exception.hxx"
#include <TopoDS_Shape.hxx>
#include <TColStd_IndexedMapOfTransient.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>

#include <set>
#include <list>
#include <map>

class SMESH_Mesh;
class SMESH_Hypothesis;
class SMESH_Algo;
class SMESH_Gen;

class SMESH_subMesh
{
 public:
  SMESH_subMesh(int Id, SMESH_Mesh * father, SMESHDS_Mesh * meshDS,
		const TopoDS_Shape & aSubShape);
  virtual ~ SMESH_subMesh();

  int GetId() const;

  //   bool Contains(const TopoDS_Shape & aSubShape)
  //     throw (SALOME_Exception);

  SMESH_Mesh* GetFather() { return _father; }
  
  SMESHDS_SubMesh * GetSubMeshDS();

  SMESHDS_SubMesh* CreateSubMeshDS();
  // Explicit SMESHDS_SubMesh creation method, required for persistence mechanism

  SMESH_subMesh *GetFirstToCompute();

  const map < int, SMESH_subMesh * >&DependsOn();
  //const map < int, SMESH_subMesh * >&Dependants();

  const TopoDS_Shape & GetSubShape();

//  bool _vertexSet;			// only for vertex subMesh, set to false for dim > 0

  enum compute_state
  {
    NOT_READY, READY_TO_COMPUTE,
    COMPUTE_OK, FAILED_TO_COMPUTE
    };
  enum algo_state
  {
    NO_ALGO, MISSING_HYP, HYP_OK
    };
  enum algo_event
  {
    ADD_HYP, ADD_ALGO,
    REMOVE_HYP, REMOVE_ALGO,
    ADD_FATHER_HYP, ADD_FATHER_ALGO,
    REMOVE_FATHER_HYP, REMOVE_FATHER_ALGO
    };
  enum compute_event
  {
    MODIF_HYP, MODIF_ALGO_STATE, COMPUTE,
    CLEAN, CLEANDEP, SUBMESH_COMPUTED, SUBMESH_RESTORED,
    MESH_ENTITY_REMOVED, CHECK_COMPUTE_STATE
    };

  SMESH_Hypothesis::Hypothesis_Status
    AlgoStateEngine(int event, SMESH_Hypothesis * anHyp);

  SMESH_Hypothesis::Hypothesis_Status
    SubMeshesAlgoStateEngine(int event, SMESH_Hypothesis * anHyp);

  int GetAlgoState() { return _algoState; }

  void DumpAlgoState(bool isMain);

  bool ComputeStateEngine(int event);

  int GetComputeState()
  {
    return _computeState;
  };

  bool IsConform(const SMESH_Algo* theAlgo);
  // check if a conform mesh will be produced by the Algo

  bool CanAddHypothesis(const SMESH_Hypothesis* theHypothesis) const;
  // return true if theHypothesis can be attached to me:
  // its dimention is checked

  bool IsApplicableHypotesis(const SMESH_Hypothesis* theHypothesis) const;
  // return true if theHypothesis can be used to mesh me:
  // its shape type is checked
  
  SMESH_Hypothesis::Hypothesis_Status CheckConcurentHypothesis (const int theHypType);
  // check if there are several applicable hypothesis on fathers

 protected:
  void InsertDependence(const TopoDS_Shape aSubShape);

  bool SubMeshesComputed();

  bool SubMeshesReady();

  void RemoveSubMeshElementsAndNodes();
  void UpdateDependantsState(const compute_event theEvent);
  void UpdateSubMeshState(const compute_state theState);
  void ComputeSubMeshStateEngine(int event);
  void CleanDependants();
  void CleanDependsOn();
  void SetAlgoState(int state);

  bool IsMeshComputed() const;
  // check if _subMeshDS contains mesh elements

  TopoDS_Shape GetCollection(SMESH_Gen * theGen, SMESH_Algo* theAlgo);
  // return a shape containing all sub-shapes of the MainShape that can be
  // meshed at once along with _subShape

  bool ApplyToCollection (SMESH_Algo*         theAlgo,
                          const TopoDS_Shape& theCollection);
  // Apply theAlgo to all subshapes in theCollection

  const SMESH_Hypothesis* GetSimilarAttached(const TopoDS_Shape&      theShape,
                                             const SMESH_Hypothesis * theHyp,
                                             const int                theHypType = 0);
  // return a hypothesis attached to theShape.
  // If theHyp is provided, similar but not same hypotheses
  // is returned; else an applicable ones having theHypType
  // is returned
  
  TopoDS_Shape _subShape;
  SMESHDS_Mesh * _meshDS;
  SMESHDS_SubMesh * _subMeshDS;
  int _Id;
  SMESH_Mesh *_father;
  map < int, SMESH_subMesh * >_mapDepend;
  bool _dependenceAnalysed;

  int _algoState;
  int _computeState;

};

#endif