import { adHocLabel } from './clearance.util';

/**
 * The customer's typed document name travels to the API inside the multipart
 * field code (`custom_<slug>_<n>`) — the only channel a part has — and comes
 * back out here for GL's review grid. Mirror of `adHocSlug` in the portal's
 * useClearanceFlow.
 */
const adHocSlug = (name: string) =>
  name
    .trim()
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, '-')
    .replace(/^-+|-+$/g, '')
    .slice(0, 60);

const roundTrip = (typed: string) => adHocLabel(`custom_${adHocSlug(typed)}_17877000000000`);

describe('adHocLabel', () => {
  it('recovers the name the customer typed', () => {
    expect(roundTrip('Special permit')).toBe('Special permit');
    expect(roundTrip('Fumigation Certificate')).toBe('Fumigation certificate');
    expect(roundTrip('bank  slip #2')).toBe('Bank slip 2');
  });

  it('returns null when there is no name to show, so callers use the filename', () => {
    expect(roundTrip('')).toBeNull();
    // Legacy uploads keyed `custom_<timestamp>_<n>` carry no name — without the
    // digits guard this would surface "1755780000000" as the document label.
    expect(adHocLabel('custom_1755780000000_0')).toBeNull();
    expect(adHocLabel('commercial_invoice')).toBeNull();
  });
});