"""Command-line entry point; --help works without Tk or Bluetooth installed."""

import argparse


def main(argv=None):
    parser = argparse.ArgumentParser(description="Samsung Sound Tower desktop controller")
    parser.add_argument(
        "--address", default="", help="Speaker Bluetooth MAC address, or an outgoing COM port"
    )
    parser.add_argument("--channel", type=int, default=1, choices=range(1, 31))
    parser.add_argument(
        "--prepare",
        action="store_true",
        help="Experimental: initialize Windows Bluetooth before RFCOMM",
    )
    parser.add_argument(
        "--transport",
        choices=("ble", "rfcomm"),
        default="ble",
        help="Control transport (default: Samsung BLE FFA0)",
    )
    args = parser.parse_args(argv)
    # Keep Tk out of the CLI import path, headless tests, and package consumers.
    from controller.gui import launch

    launch(args.address, args.channel, args.prepare, args.transport)


if __name__ == "__main__":
    main()