"""nova policy — print the active policy engine status (REQ-122)."""

from __future__ import annotations

import json

from core.policy_engine import get_engine, get_policy_root


def add_parser(subparsers):
    p = subparsers.add_parser("policy", help="print the active policy engine status")
    p.set_defaults(_run=run)


def run(args) -> int:
    eng = get_engine()
    print(json.dumps({
        "engine": eng.name,
        "is_configured": eng.is_configured(),
        "policy_root": str(get_policy_root()),
    }, indent=2))
    return 0


if __name__ == "__main__":
    import sys
    print("use: nova policy", file=sys.stderr)