def main():
    import os
    import sys

    if "--version" in sys.argv:
        from gotify_tray.__version__ import __version__

        print(__version__)
    else:
        # Check for display before importing GUI modules
        if not os.environ.get("DISPLAY"):
            print(
                "Error: No display environment detected. This application requires a graphical desktop environment to run.",
                file=sys.stderr,
            )
            sys.exit(1)
        from gotify_tray.gui import start_gui

        start_gui()


if __name__ == "__main__":
    main()