/**
 * Detects DHL-Paket shippers (M_Shipper.M_ShipperCfg_ID identifier = 'DHL'),
 * i.e. the shippers whose labels go through the DHL Parcel DE API and that can
 * deliver to a DHL Packstation. "DHL Express" / "DHL Amazon FBA" have no DHL
 * config and are deliberately NOT matched.
 *
 * Same shape as useFbaShipper: the shipper dropdown loads lazily and a saved
 * order only carries {id, identifier}, so the config can't be read from either
 * reliably. The (tiny) active shipper list is loaded once via the generic
 * filter endpoint and cached across navigations through useLookup.
 */
export const useDhlShipper = () => {
  const { data } = useLookup('/api/filters/m_shipper/' + encodeURIComponent('IsActive eq true'))
  const dhlShipperIds = computed(() =>
    new Set(((data.value as any)?.records || [])
      .filter((r: any) => String(r?.M_ShipperCfg_ID?.identifier || '').toUpperCase() === 'DHL')
      .map((r: any) => String(r.id))))
  const isDhlShipper = (id: any) => !!id && dhlShipperIds.value.has(String(id))
  return { isDhlShipper, dhlShipperIds }
}