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/// \file electromagnetic/TestEm13/TestEm13.cc
/// \brief Main program of the electromagnetic/TestEm13 example
//
//
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#include "G4Types.hh"

#include "G4RunManagerFactory.hh"
#include "G4UImanager.hh"
#include "G4SteppingVerbose.hh"
#include "Randomize.hh"

#include "DetectorConstruction.hh"
#include "PhysicsList.hh"
#include "ActionInitialization.hh"

#include "G4UIExecutive.hh"
#include "G4VisExecutive.hh"

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int main(int argc,char** argv) {

    //detect interactive mode (if no arguments) and define UI session
    G4UIExecutive* ui = nullptr;
    if (argc == 1) ui = new G4UIExecutive(argc,argv);

  //choose the Random engine
  G4Random::setTheEngine(new CLHEP::RanecuEngine);

  //Use SteppingVerbose with Unit
  G4int precision = 4;
  G4SteppingVerbose::UseBestUnit(precision);
  
  //Creating run manager
  auto runManager = G4RunManagerFactory::CreateRunManager();
    
  if (argc==3) { 
     G4int nThreads = G4UIcommand::ConvertToInt(argv[2]);
     runManager->SetNumberOfThreads(nThreads);
  }

  //set mandatory initialization classes
  DetectorConstruction* det = new DetectorConstruction;
  runManager->SetUserInitialization(det);
  runManager->SetUserInitialization(new PhysicsList);
  runManager->SetUserInitialization(new ActionInitialization(det));

  //initialize visualization
  G4VisManager* visManager = nullptr;

  //get the pointer to the User Interface manager
  G4UImanager* UImanager = G4UImanager::GetUIpointer();

  if (ui)  {
   //interactive mode
   visManager = new G4VisExecutive;
   visManager->Initialize();
   ui->SessionStart();
   delete ui;
  }
  else  {
   //batch mode
   G4String command = "/control/execute ";
   G4String fileName = argv[1];
   UImanager->ApplyCommand(command+fileName);
  }

  //job termination
  delete visManager;
  delete runManager;
}

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