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//
// G4QSSMessenger
//
// Messenger for QSS Integrator driver

// Author: Leandro Gomez Vidal (Univ. Buenos Aires) - October 2021
// --------------------------------------------------------------------
#ifndef GEANT4_G4QSSMessenger_H
#define GEANT4_G4QSSMessenger_H 1

#include "G4UIcmdWithABool.hh"
#include "G4UIcmdWithADouble.hh"
#include "G4UIcmdWithADoubleAndUnit.hh"
#include "G4UIcmdWithAString.hh"
#include "G4UIcmdWithAnInteger.hh"
#include "G4UIcmdWithoutParameter.hh"
#include "G4UIdirectory.hh"
#include "G4UImessenger.hh"

class G4QSSMessenger : public G4UImessenger
{
   public:

     G4QSSMessenger();
    ~G4QSSMessenger() override;

     void SetNewValue(G4UIcommand* command, G4String newValues) override;

     /* Hacky - much easier to access G4QSSMessenger from G4QSSDriver than the other way around
      * Multithreading seems to cause weird stuff with Driver/Stepper instances, maybe making
      * some thread-local copies or something, outside of construction? */

     static G4QSSMessenger* instance();

     enum StepperSelection
     {
       None = 0,
       TemplatedDoPri,
       OldRK45,
       G4QSS2
     };
     void selectStepper(const std::string&);
     StepperSelection selectedStepper();

  public:

    G4double dQMin = 0;
    G4double dQRel = 0;
    G4double trialProposedStepModifier = 1.0;

  private:

    StepperSelection _selectedStepper;
    G4UIdirectory* qssCmdDir;
    G4UIcmdWithADoubleAndUnit* dQMinCmd;
    G4UIcmdWithADouble* dQRelCmd;
    G4UIcmdWithAString* stepperSelectorCmd;
    G4UIcmdWithADouble* trialProposedStepModifierCmd;
};

#endif  // GEANT4_G4QSSMessenger_H