//
// ********************************************************************
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//
// G4UIbatch
//
// Class description:
//
// This is a concrete class of G4UIsession.
// This class object is instantiated by G4UImanager every time
// the "/control/execute macro_file" command is executed.
// Also, in the case of pure batch mode with a macro file,
// this class can be used as other ordinary G4UIsession
// concrete classes, i.e. SessionStart() is invoked in main().

// Author: M.Asai, 2000
// --------------------------------------------------------------------
#ifndef G4UI_BATCH_HH
#define G4UI_BATCH_HH 1

#include "G4UIsession.hh"

#include <fstream>

class G4UIbatch : public G4UIsession
{
  public:
    // "prevSession" must be null if this class is constructed from main().
    G4UIbatch(const char* fileName, G4UIsession* prevSession = nullptr);

    ~G4UIbatch() override;

    inline G4UIsession* GetPreviousSession() const;

    G4UIsession* SessionStart() override;
    void PauseSessionStart(const G4String& Prompt) override;

  private:
    // Get command from a batch script file
    G4String ReadCommand();

    G4int ExecCommand(const G4String& command);

  private:
    G4UIsession* previousSession = nullptr;

    std::ifstream macroStream;
    G4bool isOpened = false;
};

// --------------------------------------------------------------------
// Inline methods
// --------------------------------------------------------------------

inline G4UIsession* G4UIbatch::GetPreviousSession() const
{
  return previousSession;
}

#endif