"""nova env-transition — detect/record the applied environment (REQ-183)."""

from __future__ import annotations

import json

from core.env_transition import detect_prior_env, record_applied_env


def add_parser(subparsers):
    p = subparsers.add_parser("env-transition", help="detect/record the env for a contract")
    sub = p.add_subparsers(dest="env_transition_command", required=True)
    pd = sub.add_parser("detect")
    pd.add_argument("--contract-id", required=True)
    pd.add_argument("--consumer-repo", required=True)
    pd.add_argument("--new-env", required=True)
    pr = sub.add_parser("record")
    pr.add_argument("--contract-id", required=True)
    pr.add_argument("--consumer-repo", required=True)
    pr.add_argument("--env", required=True)
    p.set_defaults(_run=run)


def run(args) -> int:
    cmd = args.env_transition_command
    payload = _dispatch(cmd, args)
    print(json.dumps(payload))
    return 0 if cmd == "detect" else (0 if payload["recorded"] else 1)


def _dispatch(cmd, args) -> dict:
    return {"prior_env": detect_prior_env(args.contract_id, args.consumer_repo, args.new_env)} if cmd == "detect" else {"recorded": record_applied_env(args.contract_id, args.consumer_repo, args.env)}


if __name__ == "__main__":
    import sys
    print("use: nova env-transition detect|record ...", file=sys.stderr)