"""Launcher entrypoint for the port scanner GUI."""

import argparse

from portscanner.gui import PortScannerApp

from portscanner import APP_NAME, __version__

def build_parser() -> argparse.ArgumentParser:

"""Build the CLI argument parser."""

# Keep the CLI setup separate from Tk initialization.

parser = argparse.ArgumentParser(

prog="python main.py",

description="Launch the Port Scanner GUI",

epilog="Use --version to print the installed app version and exit.",

)

parser.add_argument("--version", action="version", version=f"{APP_NAME} {__version__}")

return parser

def main() -> None:

"""Start the Tkinter GUI launcher."""

import tkinter as tk

parser = build_parser()

# Parse first so --version exits without opening the GUI.

parser.parse_args()

root = tk.Tk()

app = PortScannerApp(root)

root.mainloop()

if __name__ == "__main__":

main()