"""Print a random secret as an environment assignment without changing any files."""

import argparse
import re
import secrets


def main() -> None:
    parser = argparse.ArgumentParser(description="Generate a secret as NAME=VALUE.")
    parser.add_argument(
        "name", help="Environment variable name, e.g. LEAD_SCORING_WEBHOOK_SIGNING_SECRET"
    )
    args = parser.parse_args()
    if re.fullmatch(r"[A-Za-z_][A-Za-z0-9_]*", args.name) is None:
        parser.error("name must be a valid environment variable name")
    print(f"{args.name}={secrets.token_hex(32)}")


if __name__ == "__main__":
    main()