/**
 * Invoice status helpers for Ready-to-Pay and post pay-run alignment.
 * Thin surface for AP-17; full pay-run logic stays in the API.
 */

export const INVOICE_STATUSES = [
  "pending_approval",
  "approved",
  "scheduled",
  "paid",
  "rejected",
  "void",
] as const;

export type InvoiceStatus = (typeof INVOICE_STATUSES)[number];

/** Invoices eligible for Select to Pay / pay-run selection. */
export const READY_TO_PAY_STATUSES = ["approved"] as const satisfies readonly InvoiceStatus[];

export function isInvoiceStatus(value: string): value is InvoiceStatus {
  return (INVOICE_STATUSES as readonly string[]).includes(value);
}

export function isReadyToPay(status: InvoiceStatus | string): boolean {
  return (READY_TO_PAY_STATUSES as readonly string[]).includes(status);
}

/** Status after a successful pay run groups the invoice into the payments queue. */
export function statusAfterPayRun(): InvoiceStatus {
  return "scheduled";
}

/** Terminal paid status once the payment ladder reaches cleared (AP-17 wiring). */
export function statusAfterPaymentCleared(): InvoiceStatus {
  return "paid";
}