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/// \file RE04.cc
/// \brief Main program of the runAndEvent/RE04 example

#include "FTFP_BERT.hh"
#include "RE04ActionInitialization.hh"
#include "RE04DetectorConstruction.hh"
#include "RE04ParallelWorldConstruction.hh"

#include "G4ParallelWorldPhysics.hh"
#include "G4RunManagerFactory.hh"
#include "G4ScoringManager.hh"
#include "G4Types.hh"
#include "G4UIExecutive.hh"
#include "G4UImanager.hh"
#include "G4VisExecutive.hh"

int main(int argc, char** argv)
{
  // Instantiate G4UIExecutive if there are no arguments (interactive mode)
  G4UIExecutive* ui = nullptr;
  if (argc == 1) {
    ui = new G4UIExecutive(argc, argv);
  }

  // Construct the run manager
  auto* runManager = G4RunManagerFactory::CreateRunManager();

  G4ScoringManager::GetScoringManager();

  G4String paraWorldName = "ParallelWorld";

  // Set mandatory initialization classes
  //
  RE04DetectorConstruction* realWorld = new RE04DetectorConstruction;
  RE04ParallelWorldConstruction* parallelWorld = new RE04ParallelWorldConstruction(paraWorldName);
  realWorld->RegisterParallelWorld(parallelWorld);
  runManager->SetUserInitialization(realWorld);
  //
  G4VModularPhysicsList* physicsList = new FTFP_BERT;
  physicsList->RegisterPhysics(new G4ParallelWorldPhysics(paraWorldName, true));
  runManager->SetUserInitialization(physicsList);

  // Set user action classes
  //
  runManager->SetUserInitialization(new RE04ActionInitialization);

  // Visualization manager
  //
  G4VisManager* visManager = new G4VisExecutive;
  visManager->Initialize();

  // Initialize G4 kernel
  //
  runManager->Initialize();

  // Get the pointer to the User Interface manager
  //
  G4UImanager* pUImanager = G4UImanager::GetUIpointer();

  if (ui)  // Define UI session for interactive mode
  {
    pUImanager->ApplyCommand("/control/execute vis.mac");
    ui->SessionStart();
    delete ui;
  }
  else  // Batch mode
  {
    G4String command = "/control/execute ";
    G4String fileName = argv[1];
    pUImanager->ApplyCommand(command + fileName);
  }

  delete visManager;
  delete runManager;

  return 0;
}
