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/// \file Hadr02.cc
/// \brief Main program of the hadronic/Hadr02 example

// -------------------------------------------------------------
//      GEANT4 Hadr02
//
//  Application demonstrating Geant4 hadronic cross sections
//
//  Author: V.Ivanchenko 20 June 2008
//
//  Modified:
//
// -------------------------------------------------------------
//
//
#include "CRMC_FTFP_BERT.hh"
#include "DetectorConstruction.hh"
#include "EventAction.hh"
#include "HistoManager.hh"
#include "PrimaryGeneratorAction.hh"
#include "RunAction.hh"
#include "StackingAction.hh"
#include "UrQMD.hh"

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

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
  CLHEP::HepRandom::setTheEngine(new CLHEP::RanecuEngine());

  // Construct a serial run manager
  auto* runManager = G4RunManagerFactory::CreateRunManager(G4RunManagerType::SerialOnly);

  // set mandatory initialization classes
  runManager->SetUserInitialization(new DetectorConstruction());

  G4PhysListFactory factory;
  G4VModularPhysicsList* phys = 0;

  // default Physics List for this example
  G4String physName = "QBBC";

  // Physics List name defined via 2nd argument
  if (argc == 3) {
    physName = argv[2];
  }
  else {
    char* path = std::getenv("PHYSLIST");
    if (path) {
      physName = G4String(path);
    }
  }
  if (physName == "UrQMD") {
    phys = new UrQMD;
  }
  else if (physName == "CRMC_FTFP_BERT") {
    phys = new CRMC_FTFP_BERT;
  }
  else {
    phys = factory.GetReferencePhysList(physName);
  }

  // Physics List is defined via environment variable PHYSLIST
  if (!phys) {
    G4cout << "Hadr02 FATAL ERROR: Physics List is not defined" << G4endl;
    return 1;
  }
  runManager->SetUserInitialization(phys);
  HistoManager::GetPointer()->SetPhysicsList(phys);

  runManager->SetUserAction(new PrimaryGeneratorAction());

  // set user action classes
  runManager->SetUserAction(new RunAction());
  runManager->SetUserAction(new EventAction());
  runManager->SetUserAction(new StackingAction());

  // initialize visualization
  G4VisManager* visManager = new G4VisExecutive;
  visManager->Initialize();

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

  if (ui) {
    // interactive mode
    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;
}