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/// \file monopole.cc
/// \brief Main program of the exoticphysics/monopole example

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

#include "G4MonopolePhysics.hh"
#include "G4PhysListFactory.hh"
#include "G4RunManagerFactory.hh"
#include "G4Types.hh"
#include "G4UIExecutive.hh"
#include "G4UImanager.hh"
#include "G4VModularPhysicsList.hh"
#include "G4VisExecutive.hh"
#include "Randomize.hh"
#include "globals.hh"

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namespace
{
void PrintUsage()
{
  G4cerr << " Usage: " << G4endl << " monopole [-m macro ] [-s setupMonopole] [-t nThreads]"
         << G4endl << "   Note: " << G4endl
         << "    -s should be followed by a composed string, eg. \'1 0 100 GeV\'" << G4endl
         << "    -t option is for multi-threaded mode." << G4endl << G4endl;
}
}  // namespace

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int main(int argc, char** argv)
{
  // Evaluate arguments
  //
  if (argc > 7) {
    PrintUsage();
    return 1;
  }

  G4String macro;
  G4String setupMonopole;
  G4int nThreads = 1;
  for (G4int i = 1; i < argc; i = i + 2) {
    if (G4String(argv[i]) == "-m")
      macro = argv[i + 1];
    else if (G4String(argv[i]) == "-s")
      setupMonopole = argv[i + 1];
    else if (G4String(argv[i]) == "-t") {
      nThreads = G4UIcommand::ConvertToInt(argv[i + 1]);
    }
    else {
      PrintUsage();
      return 1;
    }
  }

  // Construct the default run manager
  auto* runManager = G4RunManagerFactory::CreateRunManager();
  if (nThreads > 0) {
    runManager->SetNumberOfThreads(nThreads);
  }
  G4cout << "===== Example is started with " << runManager->GetNumberOfThreads()
         << " threads =====" << G4endl;

  // Instantiate G4UIExecutive if interactive
  G4UIExecutive* ui = nullptr;
  if (macro.empty()) {
    ui = new G4UIExecutive(argc, argv);
  }

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

  // create physicsList
  //  Physics List is defined via environment variable PHYSLIST
  G4PhysListFactory factory;
  G4VModularPhysicsList* phys = factory.GetReferencePhysList("FTFP_BERT");

  // monopole physics is added
  G4MonopolePhysics* theMonopole = new G4MonopolePhysics();

  // Setup monopole
  if (setupMonopole.size()) {
    UImanager->ApplyCommand("/control/verbose 1");
    UImanager->ApplyCommand("/monopole/setup " + setupMonopole);
  }

  // regsiter monopole physics
  phys->RegisterPhysics(theMonopole);

  runManager->SetUserInitialization(phys);

  // visualization manager
  G4VisManager* visManager = nullptr;

  // set detector construction
  DetectorConstruction* det = new DetectorConstruction();
  runManager->SetUserInitialization(det);

  // set user action classes
  runManager->SetUserInitialization(new ActionInitialization(det));

  // Process macro or start UI session
  //
  if (macro.size()) {
    // batch mode
    G4String command = "/control/execute ";
    UImanager->ApplyCommand(command + macro);
  }
  else {
    // interactive mode : define UI session
    visManager = new G4VisExecutive();
    visManager->Initialize();
    UImanager->ApplyCommand("/control/execute init_vis.mac");
    ui->SessionStart();
    delete ui;
  }

  delete visManager;

  // job termination
  delete runManager;

  return 0;
}

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