import type { ClinicianInvitation } from "../../services/ClinicianInvitationService";

export type ResendReadBack =
    | { kind: "changed"; invitation: ClinicianInvitation }
    | { kind: "unknown" };

/**
 * A resend whose answer was lost is read back rather than repeated, since repeating it blind would kill the link
 * just sent and send a second. The read never proves the outcome: an unchanged invitation may still be rotated by the
 * request in flight, and a changed one may be another resend. So a change is shown as seen, and nothing is "not sent".
 */
export const readBackResend = async (
    before: ClinicianInvitation,
    list: () => Promise<ClinicianInvitation[]>,
): Promise<ResendReadBack> => {
    try {
        const now = (await list()).find((each) => each.id === before.id);
        return now && now.expiresAt !== before.expiresAt ? { kind: "changed", invitation: now } : { kind: "unknown" };
    } catch {
        return { kind: "unknown" };
    }
};

export const RESEND_UNCONFIRMED =
    "We could not confirm whether the invitation was sent again. Its link may have changed, so check the invitation before sending it again.";

export const RESEND_CHANGED =
    "The invitation now has a new link and expiry, but we could not confirm it came from this attempt. Check it before sending it again.";