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// $Id: G4ParameterManager.hh 91012 2015-06-15 10:38:07Z ihrivnac $

// The common implementation of analysis manager classes.

// Author: Ivana Hrivnacova, 07/09/2015  (ivana@ipno.in2p3.fr)

#ifndef G4ParameterManager_h
#define G4ParameterManager_h 1

#include "G4Parameter.hh"
#include "G4AnalysisManagerState.hh"
#include "globals.hh"

#include <map>
#include <vector>

class G4AnalysisManagerState;
class G4VParameter;

class G4ParameterManager
{
  public:
    G4ParameterManager(G4bool isMaster = true);
    virtual ~G4ParameterManager();
     
    // static methods
    static G4ParameterManager* Instance();
   
    // Methods

    // Requirements for parameter type:
    // Must have defined operators: +, ==, +=, *=
    template <typename T> 
    void CreateParameter(const G4String& name, T value, 
                         G4MergeMode mergeMode = G4MergeMode::kAddition);

    template <typename T> 
    void RegisterParameter(G4Parameter<T>& parameter);

    template <typename T> 
    G4Parameter<T>*  GetParameter(const G4String& name, G4bool warn = true) const;

    // Handling user defined parameters
    void RegisterParameter(G4VParameter* parameter);
    G4VParameter*  GetParameter(const G4String& name, G4bool warn = true) const;


    // Iterators not (yet) provided

    // Methods for merging
    //G4bool MergeImpl(tools::histo::hmpi* hmpi);
    void Merge();
    void Reset();

  private:
    // static data members
    static G4ParameterManager* fgMasterInstance;
    static G4ThreadLocal G4ParameterManager* fgInstance;    

    // data members
    const G4AnalysisManagerState      fState;
    std::map<G4String, G4VParameter*> fMap;
    std::vector<G4VParameter*>        fParametersToDelete;
 };

#include "G4ParameterManager.icc"

#endif