import { BookingNotifierService } from './booking-notifier.service';

/**
 * Message wording for the schedule-related customer notices: every one must
 * quote the SCHEDULE's train + voyage numbers, and reschedules must carry the
 * staff-entered reason instead of a hard-coded "for maintenance".
 */
describe('BookingNotifierService messages', () => {
  const schedule = { trainNumber: '8001', voyageNumber: 'V-117' };
  const booking = { id: 'b1', reference: 'BK-2026-000928', companyId: 'c1' } as never;
  const departure = new Date('2026-09-01T05:00:00.000Z');

  let sent: string[];
  let inbox: string[];
  let service: BookingNotifierService;

  beforeEach(() => {
    sent = [];
    inbox = [];
    const notifications = {
      directSend: jest.fn(async (_m: string, _to: string, msg: string) => {
        sent.push(msg);
      }),
    };
    const inboxSvc = {
      notify: jest.fn(async (input: { body: string }) => {
        inbox.push(input.body);
      }),
    };
    const trainSchedules = {
      findByIdWithStations: jest.fn(async () => ({ ...schedule, reference: 'S-2026-00012' })),
    };
    // Company contact lookup goes through raw SQL; return one phone + email.
    const dataSource = {
      query: jest.fn(async () => [{ phone: '+251900000000', email: 'ops@example.com' }]),
    };
    service = new BookingNotifierService(
      notifications as never,
      inboxSvc as never,
      trainSchedules as never,
      dataSource as never,
    );
  });

  const flush = () => new Promise((r) => setImmediate(r));

  it('maintenance reschedule quotes train, voyage and the staff reason', async () => {
    service.maintenanceMoved(booking, departure, schedule, 'Locomotive maintenance.');
    await flush();
    expect(inbox[0]).toBe(
      'Train 8001 (voyage V-117) for booking BK-2026-000928 was rescheduled — reason: Locomotive maintenance. ' +
        'New departure date: 01/09/2026.',
    );
  });

  it('maintenance reschedule falls back to "for maintenance" without a reason', async () => {
    service.maintenanceMoved(booking, departure, schedule, '   ');
    await flush();
    expect(inbox[0]).toContain('was rescheduled for maintenance. New departure date');
  });

  it('plain reschedule carries the reason and the run label', async () => {
    service.rescheduled(booking, departure, schedule, 'Crew change');
    await flush();
    expect(inbox[0]).toBe(
      'Booking BK-2026-000928 on train 8001 (voyage V-117) has been rescheduled — reason: Crew change. ' +
        'New departure date: 01/09/2026.',
    );
  });

  it('resolves the run label from a schedule id when only the id is known', async () => {
    service.scheduleCancelled(booking, 'sched-1');
    await flush();
    expect(inbox[0]).toMatch(/^Train 8001 \(voyage V-117\) for booking BK-2026-000928 has been cancelled/);
  });
});