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//
//
//
// --------------------------------------------------------------
//      GEANT 4 - examplePar04
// --------------------------------------------------------------
// Comments
//
// Example of a main program demonstrating multiple energy deposition
// from fast simulation model.
//
//-------------------------------------------------------------------
#include <G4Exception.hh>                // for G4Exception
#include <G4ExceptionSeverity.hh>        // for FatalErrorInArgument
#include <G4RunManager.hh>               // for G4RunManager
#include <G4String.hh>                   // for G4String
#include <G4VisManager.hh>               // for G4VisManager
#include <G4ios.hh>                      // for G4cout, G4endl
#include <sstream>                       // for char_traits, operator<<, bas...
#include <string>                        // for allocator, operator+, operat...
#include "FTFP_BERT.hh"                  // for FTFP_BERT
#include "G4EmParameters.hh"             // for G4EmParameters
#include "G4FastSimulationPhysics.hh"    // for G4FastSimulationPhysics
#include "G4HadronicProcessStore.hh"     // for G4HadronicProcessStore
#include "G4RunManagerFactory.hh"        // for G4RunManagerFactory, G4RunMa...
#include "G4Types.hh"                    // for G4bool, G4int
#include "G4UIExecutive.hh"              // for G4UIExecutive
#include "G4UImanager.hh"                // for G4UImanager
#include "G4VisExecutive.hh"             // for G4VisExecutive
#include "Par04ActionInitialisation.hh"  // for Par04ActionInitialisation
#include "Par04DetectorConstruction.hh"  // for Par04DetectorConstruction

int main(int argc, char** argv)
{
  // Macro name from arguments
  G4String batchMacroName;
  G4bool useInteractiveMode = true;
  G4String helpMsg(
    "Usage: " + G4String(argv[0]) +
    " [option(s)] \n No additional arguments triggers an interactive mode "
    "executing vis.mac macro. \n Options:\n\t-h\t\tdisplay this help "
    "message\n\t-m MACRO\ttriggers a batch mode executing MACRO\n");
  for(G4int i = 1; i < argc; ++i)
  {
    G4String argument(argv[i]);
    if(argument == "-h" || argument == "--help")
    {
      G4cout << helpMsg << G4endl;
      return 0;
    }
    else if(argument == "-m")
    {
      batchMacroName     = G4String(argv[i + 1]);
      useInteractiveMode = false;
      ++i;
    }
    else
    {
      G4Exception("main", "Unknown argument", FatalErrorInArgument,
                  ("Unknown argument passed to " + G4String(argv[0]) + " : " +
                   argument + "\n" + helpMsg)
                    .c_str());
    }
  }

  // Instantiate G4UIExecutive if interactive mode
  G4UIExecutive* ui = nullptr;
  if(useInteractiveMode)
  {
    ui = new G4UIExecutive(argc, argv);
  }

  // Initialization of default Run manager
  auto* runManager =
    G4RunManagerFactory::CreateRunManager(G4RunManagerType::Default);

  // Detector geometry:
  auto detector = new Par04DetectorConstruction();
  runManager->SetUserInitialization(detector);

  // Physics list
  auto physicsList = new FTFP_BERT();
  // Add fast simulation physics
  auto fastSimulationPhysics = new G4FastSimulationPhysics();
  fastSimulationPhysics->BeVerbose();
  fastSimulationPhysics->ActivateFastSimulation("e-");
  fastSimulationPhysics->ActivateFastSimulation("e+");
  fastSimulationPhysics->ActivateFastSimulation("gamma");
  physicsList->RegisterPhysics(fastSimulationPhysics);
  // reduce verbosity of physics lists
  G4EmParameters::Instance()->SetVerbose(0);
  runManager->SetUserInitialization(physicsList);
  G4HadronicProcessStore::Instance()->SetVerbose(0);

  //-------------------------------
  // UserAction classes
  //-------------------------------
  runManager->SetUserInitialization(new Par04ActionInitialisation(detector));

  //----------------
  // Visualization:
  //----------------
  G4cout << "Instantiating Visualization Manager......." << G4endl;
  G4VisManager* visManager = new G4VisExecutive;
  visManager->Initialize();
  G4UImanager* UImanager = G4UImanager::GetUIpointer();

  if(useInteractiveMode)
  {
    UImanager->ApplyCommand("/control/execute vis.mac");
    ui->SessionStart();
    delete ui;
  }
  else
  {
    G4String command = "/control/execute ";
    UImanager->ApplyCommand(command + batchMacroName);
  }

  // Free the store: user actions, physics_list and detector_description are
  //                 owned and deleted by the run manager, so they should not
  //                 be deleted in the main() program !

  delete visManager;
  delete runManager;

  return 0;
}