"""nova hitl — attest a promotion gate (REQ-108)."""

from __future__ import annotations

import json
import sys

from core.hitl_gates import attest, approver_from_env


def add_parser(subparsers):
    p = subparsers.add_parser("hitl", help="attest a promotion gate")
    p.add_argument("--contract-id", required=True)
    p.add_argument("--env", required=True, help="dev/qa/prod/dr")
    p.add_argument("--evidence", default=None, help="evidence JSON path")
    p.set_defaults(_run=run)


def run(args) -> int:
    evidence = _load_evidence(args.evidence)
    approver = approver_from_env() or ""
    ok, reason = attest(args.contract_id, args.env, approver, evidence)
    print(f"HITL PASS: {reason}") if ok else sys.stderr.write(f"HITL BLOCK: {reason}\n")
    return 0 if ok else 1


def _load_evidence(path):
    return {} if path is None else json.loads(open(path).read())


if __name__ == "__main__":
    import sys
    print("use: nova hitl --contract-id <id> --env <env> [--evidence f.json]", file=sys.stderr)