from .monitor_cert_expiry import CertExpiryState
from .monitor_check_status import CheckStatus

_STATUS = {"ok": "up", "warning": "up", "critical": "degraded", "expired": "down"}


def cert_check(state: CertExpiryState) -> CheckStatus:
    """A certificate as one check behind a status page component. A warning
    is work for the operator, not something a visitor notices, so it stays
    up; critical is degraded because renewal is now urgent; an expired
    certificate breaks every client, so it is down."""
    if state not in _STATUS:
        raise ValueError("unknown certificate state: %s" % (state,))
    return _STATUS[state]  # type: ignore[return-value]