/**
 * Detects Amazon-FBA shippers (M_Shipper.isAmazonFba = 'Y').
 *
 * Needed independently of the shipper dropdown: on a saved order the shipper
 * arrives as {id, identifier} only, and SelectBox options load lazily on click —
 * so the FBA flag can't be read from either reliably. This loads the (tiny) set
 * of FBA shipper ids once via the generic filter endpoint and caches it across
 * navigations through useLookup.
 */
export const useFbaShipper = () => {
  const { data } = useLookup('/api/filters/m_shipper/' + encodeURIComponent('isAmazonFba eq true'))
  const fbaShipperIds = computed(() =>
    new Set(((data.value as any)?.records || []).map((r: any) => String(r.id))))
  const isFbaShipper = (id: any) => !!id && fbaShipperIds.value.has(String(id))
  return { isFbaShipper, fbaShipperIds }
}