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//
//        ----------------  G4ProcessManager  -----------------
//
// Class Description:
//
//  G4ProcessManager collects all physics a particle can undertake as
//  vectors. These vectors are:
//   one vector for all processes (called as "process List")
//   two vectors for processes with AtRestGetPhysicalInteractionLength()
//                                    and AtRestDoIt()
//   two vectors for processes with AlongStepGetPhysicalInteractionLength()
//                                    and AlongStepDoIt()
//   two vectors for processes with PostStepGetPhysicalInteractionLength()
//                                    and PostStepDoIt()
//  The tracking will message three types of GetPhysicalInteractionLength()
//  in order to limit the Step and select the occurrence of processes. 
//  It will message the corresponding DoIt() to apply the selected 
//  processes. In addition, the Tracking will limit the Step
//  and select the occurrence of the processes according to
//  the shortest physical interaction length computed (except for
//  processes at rest, for which the Tracking will select the
//  occurrence of the process which returns the shortest mean
//  life-time from the GetPhysicalInteractionLength()).

// - First implementation, based on object model of
//   2nd December 1995, G.Cosmo
// - Revised; added vector of processes at rest
//   06 May 1996, G.Cosmo
// --------------------------------------------------------------------
// - New Physics scheme - 08.01.1997, H.Kurashige
// - Use STL vector instead of RW vector - 01.03.2000, H.Kurashige
// --------------------------------------------------------------------
#ifndef G4ProcessManager_hh
#define G4ProcessManager_hh 1

#include <vector>

#include "globals.hh"
#include "G4ios.hh"

#include "G4VProcess.hh"
#include "G4ProcessVector.hh"
#include "G4ParticleDefinition.hh"

class G4ProcessManagerMessenger;
class G4ProcessAttribute;

//  Indexes for ProcessVector
enum G4ProcessVectorTypeIndex
{ 
        typeGPIL = 0,        // for GetPhysicalInteractionLength 
        typeDoIt =1          // for DoIt
};
enum G4ProcessVectorDoItIndex
{
        idxAll = -1,         // for all DoIt/GPIL 
        idxAtRest = 0,       // for AtRestDoIt/GPIL
        idxAlongStep = 1,    // for AlongStepDoIt/GPIL
        idxPostStep =2,      // for AlongSTepDoIt/GPIL
        NDoit =3
};

//  enumeration for Ordering Parameter      
enum G4ProcessVectorOrdering
{ 
        ordInActive = -1,    // ordering parameter to indicate InActive DoIt
        ordDefault = 1000,   // default ordering parameter
        ordLast    = 9999    // ordering parameter to indicate the last DoIt
};

class G4ProcessManager 
{
  public: 
      // copy constructor
      G4ProcessManager(G4ProcessManager &right);

  private:
      // hide default constructor and assignment operator
      G4ProcessManager & operator=(const G4ProcessManager &right);
      G4ProcessManager();

  public:
 
      G4ProcessManager(const G4ParticleDefinition* aParticleType);
      //  Constructor

      ~G4ProcessManager();
      //  Destructor

      G4bool operator==(const G4ProcessManager &right) const;
      G4bool operator!=(const G4ProcessManager &right) const;

 public: //  with description
      G4ProcessVector* GetProcessList() const;
      //  Returns the address of the vector of all processes 

      G4int  GetProcessListLength() const;
      //  Returns the number of process in the ProcessVector 

      G4int GetProcessIndex(G4VProcess *) const;
      //  Returns the index of the process in the process List

      // --------------------------------------

      G4ProcessVector* GetProcessVector( 
                               G4ProcessVectorDoItIndex idx,
                               G4ProcessVectorTypeIndex typ = typeGPIL
                              ) const;
      //  Returns the address of the vector of processes 

      G4ProcessVector* GetAtRestProcessVector(
                               G4ProcessVectorTypeIndex typ = typeGPIL
                              ) const; 
      //  Returns the address of the vector of processes for
      //    AtRestGetPhysicalInteractionLength      idx =0
      //    AtRestGetPhysicalDoIt                   idx =1
      G4ProcessVector* GetAlongStepProcessVector(
                               G4ProcessVectorTypeIndex typ = typeGPIL
                              ) const;
      //  Returns the address of the vector of processes for
      //    AlongStepGetPhysicalInteractionLength      idx =0
      //    AlongStepGetPhysicalDoIt                   idx =1

      G4ProcessVector* GetPostStepProcessVector(
                               G4ProcessVectorTypeIndex typ = typeGPIL
                              ) const;
      //  Returns the address of the vector of processes for
      //    PostStepGetPhysicalInteractionLength      idx =0
      //    PostStepGetPhysicalDoIt                   idx =1

      G4int GetProcessVectorIndex(
                           G4VProcess* aProcess,
                           G4ProcessVectorDoItIndex idx,
                           G4ProcessVectorTypeIndex typ  = typeGPIL
                           ) const;
      G4int GetAtRestIndex(
                           G4VProcess* aProcess,
                           G4ProcessVectorTypeIndex typ  = typeGPIL
                           ) const;
      G4int GetAlongStepIndex(
                           G4VProcess* aProcess,
                           G4ProcessVectorTypeIndex typ  = typeGPIL
                           ) const;
      G4int GetPostStepIndex(
                           G4VProcess* aProcess,
                           G4ProcessVectorTypeIndex typ = typeGPIL
                           ) const;
      //  Returns the index for GPIL/DoIt process vector of the process  

      G4int AddProcess(
             G4VProcess *aProcess,
             G4int      ordAtRestDoIt = ordInActive,
             G4int      ordAlongSteptDoIt = ordInActive,
             G4int      ordPostStepDoIt = ordInActive
            );
      //  Add a process to the process List
      //  return values are index to the List. Negative return value 
      //  indicates that the process has not be added due to some errors
      //  The first argument is a pointer to process.
      //  Following arguments are ordering parameters of the process in 
      //  process vectors. If value is negative, the process is
      //  not added to the corresponding process vector. 
   
      //  following methods are provided for simple processes  
      //   AtRestProcess has only AtRestDoIt
      //   ContinuousProcess has only AlongStepDoIt
      //   DiscreteProcess has only PostStepDoIt
      //  If the ording parameter is not specified, the process is
      //  added at the end of List of process vectors 
      //  If a process with same ordering parameter exists, 
      //   this new process will be added just after processes 
      //   with same ordering parameter  
      //  (except for processes assigned to LAST explicitly )
      //  for both DoIt and GetPhysicalInteractionLength
      //  

      G4int AddRestProcess(G4VProcess *aProcess, G4int ord = ordDefault);
      G4int AddDiscreteProcess(G4VProcess *aProcess, G4int ord = ordDefault);
      G4int AddContinuousProcess(G4VProcess *aProcess, G4int ord = ordDefault);


       /////////////////////////////////////////////// 
      // Methods for setting ordering parameters
      // Altanative methods for setting ordering parameters 
      //   Note: AddProcess method should precede these methods

      G4int GetProcessOrdering(
                               G4VProcess *aProcess,
                               G4ProcessVectorDoItIndex idDoIt
                               );

      void SetProcessOrdering(
                               G4VProcess *aProcess,
                               G4ProcessVectorDoItIndex idDoIt,
                               G4int      ordDoIt = ordDefault
                               );
      // Set ordering parameter for DoIt specified by typeDoIt.
      // If a process with same ordering parameter exists, 
      // this new process will be added just after processes 
      // with same ordering parameter  
      // Note: Ordering parameter will bet set to non-zero 
      //       even if you set  ordDoIt = 0
            
     void SetProcessOrderingToFirst(
                               G4VProcess *aProcess,
                               G4ProcessVectorDoItIndex idDoIt
                               );
      // Set ordering parameter to the first of all processes 
      // for DoIt specified by idDoIt.
      //  Note: If you use this method for two processes,
      //        a process called later will be first.

      void SetProcessOrderingToSecond(
                               G4VProcess *aProcess,
                               G4ProcessVectorDoItIndex idDoIt
                               );
      // Set ordering parameter to 1 for DoIt specified by idDoIt
      // and the rpocess will be added just after 
      // the processes with ordering parameter equal to zero
      //  Note: If you use this method for two processes,
      //        a process called later will be .

        void SetProcessOrderingToLast(
                               G4VProcess *aProcess,
                               G4ProcessVectorDoItIndex idDoIt
                               );
      // Set ordering parameter to the last of all processes 
      // for DoIt specified by idDoIt.
      //  Note: If you use this method for two processes,
      //        a process called later will precede.

      G4VProcess*  RemoveProcess(G4VProcess *aProcess);
      G4VProcess*  RemoveProcess(G4int      index);
      //  Removes a process from the process List.
      //  return value is pointer to the removed process.
      //  (0 value will be returned in case of errors)

      G4VProcess* SetProcessActivation(G4VProcess *aProcess, G4bool fActive);
      G4VProcess* SetProcessActivation(G4int      index, G4bool fActive);
      //  Set activation flag. 
      //  return value is pointer to the applied process.
      //  (0 value will be returned in case of errors)

      G4bool GetProcessActivation(G4VProcess *aProcess) const;
      G4bool GetProcessActivation(G4int      index) const;
      //  Get activation flag. 

      G4ParticleDefinition*  GetParticleType() const;
      // get the particle type 
      void SetParticleType(const G4ParticleDefinition*);
      // set the particle type

      G4VProcess* GetProcess (const G4String&) const;
      // get process by process name

      void StartTracking(G4Track* aTrack=0);
      void EndTracking();
      // these two methods are used by G4TrackingManager 
      // in order to inform Start/End of tracking for each track
      // to the process manager and all physics processes 


  public:
      enum {SizeOfProcVectorArray = 6};
  private:
      G4ProcessVector* theProcVector[SizeOfProcVectorArray];
      // vector for processes with GetPhysicalInteractionLength/DoIt

      typedef std::vector<G4ProcessAttribute*> G4ProcessAttrVector; 
      G4ProcessAttrVector*  theAttrVector;
      // vector for process attribute  

  protected: // with description
      G4int InsertAt(G4int position, G4VProcess* process, G4int ivec);
      // insert process at position in theProcVector[ivec]

      G4int RemoveAt(G4int position, G4VProcess* process, G4int ivec);
      // remove process at position in theProcVector[ivec]

      G4int FindInsertPosition(G4int ord, G4int ivec);
      // find insert position according to ordering parameter 
      // in theProcVector[ivec]

      G4int GetProcessVectorId(G4ProcessVectorDoItIndex idx,
                               G4ProcessVectorTypeIndex typ = typeGPIL) const;

  void CheckOrderingParameters(G4VProcess*) const;
       // check consistencies between ordering parameters and 
       // validity of DoIt of the Process 

  private:     
      G4ProcessAttribute* GetAttribute(G4int      index) const;
      G4ProcessAttribute* GetAttribute(G4VProcess *aProcess) const;
      // get Pointer to ProcessAttribute

      G4VProcess* ActivateProcess(G4int   index);
      G4VProcess* InActivateProcess(G4int  index);
      // Activate/InActivateProcess   Process
      
  private:     
      const G4ParticleDefinition*   theParticleType;
      //  particle which has this process manager object     

      G4int             numberOfProcesses;
      G4ProcessVector*  theProcessList;
      // vector for all processes (called as "process List")

 private:
      G4bool  duringTracking;
      void    CreateGPILvectors();
      void    SetIndexToProcessVector(G4int ivec);

      G4bool  isSetOrderingFirstInvoked[NDoit];
      G4bool  isSetOrderingLastInvoked[NDoit];

 public: // with description
   void  DumpInfo();

   void  SetVerboseLevel(G4int value);
   G4int GetVerboseLevel() const;
   // controle flag for output message
   //  0: Silent
   //  1: Warning message
   //  2: More

 protected:
   G4int verboseLevel;
  
 private:
   static G4ThreadLocal G4ProcessManagerMessenger* fProcessManagerMessenger;
   static G4ThreadLocal G4int                      counterOfObjects;
};

#include "G4ProcessManager.icc"

#endif
