import type { PaymentMethod } from "./types";

/**
 * Whether an invoice delivery action (render a PDF, send the email) must be
 * refused because no payment method is configured — the recipient would
 * receive a bill with no way to pay it. `allowNoPayment` is the escape hatch
 * for users who deliberately bill without on-invoice payment instructions
 * (e.g. they arrange payment out of band).
 *
 * Shared by the CLI (`invoice pdf` / `invoice send`) and the web hub API
 * routes (`GET /api/invoices/[id]/pdf`, `POST /api/invoices/[id]/send`) so the
 * gate is defined exactly once and can never drift between surfaces.
 */
export function shouldRefuseNoPayment(
  paymentMethods: PaymentMethod[] | undefined,
  allowNoPayment: boolean,
): boolean {
  return (paymentMethods?.length ?? 0) === 0 && !allowNoPayment;
}