"""autoscalerctl CLI entry point — stub for Plan 04."""

from __future__ import annotations

import argparse
import sys


def main() -> None:
    """Entry point for the autoscalerctl CLI."""
    parser = argparse.ArgumentParser(prog="autoscalerctl", description="Autoscaler CLI")
    parser.add_argument(
        "--socket", default="/run/nix-builder-autoscaler/daemon.sock", help="Daemon socket path"
    )
    subparsers = parser.add_subparsers(dest="command")
    subparsers.add_parser("status", help="Show daemon status")
    subparsers.add_parser("slots", help="List slots")
    subparsers.add_parser("reservations", help="List reservations")

    args = parser.parse_args()
    if not args.command:
        parser.print_help()
        sys.exit(1)

    print(f"autoscalerctl: command '{args.command}' not yet implemented")
    sys.exit(1)