import { BookingBatchService } from './booking-batch.service';
import { Booking } from '../bookings/entities/booking.entity';

describe('BookingBatchService — PAID reconcile', () => {
  const scheduleId = 'schedule-1';
  const bookingId = 'booking-1';

  const paidBooking = {
    id: bookingId,
    reference: 'BK-2026-000034',
    trainScheduleId: scheduleId,
    status: 'PAID',
    paymentStatus: 'PAID',
    isGovernment: false,
    cargoTotalWeightVgm: 20,
    bookingContainers: [],
  } as unknown as Booking;

  let service: BookingBatchService;
  let bookingsRepository: {
    findPaidUnlinkedForSchedule: jest.Mock;
    findBatchPool: jest.Mock;
    findReservedForSchedule: jest.Mock;
    update: jest.Mock;
  };
  let trainScheduleBookingsRepository: {
    existsForBooking: jest.Mock;
    createMany: jest.Mock;
  };
  let trainSchedulesRepository: {
    findByIdWithFullGraph: jest.Mock;
    findAll: jest.Mock;
  };
  let trainSchedulingService: {
    tryAutoWagonAllocation: jest.Mock;
  };
  let dataSource: {
    getRepository: jest.Mock;
    transaction: jest.Mock;
  };

  beforeEach(() => {
    bookingsRepository = {
      findPaidUnlinkedForSchedule: jest.fn().mockResolvedValue([]),
      findBatchPool: jest.fn().mockResolvedValue([]),
      findReservedForSchedule: jest.fn().mockResolvedValue([]),
      update: jest.fn().mockResolvedValue(undefined),
    };
    trainScheduleBookingsRepository = {
      existsForBooking: jest.fn().mockResolvedValue(false),
      createMany: jest.fn().mockResolvedValue(undefined),
    };
    trainSchedulesRepository = {
      findByIdWithFullGraph: jest.fn().mockResolvedValue({
        id: scheduleId,
        maxWagons: 10,
        bookingWindowStatus: 'OPEN',
        trainSet: { locomotive: { maxPullWeightTons: 3500, maxTrainLengthMeters: 760 } },
        scheduleBookings: [],
      }),
      findAll: jest.fn().mockResolvedValue([]),
    };
    trainSchedulingService = {
      tryAutoWagonAllocation: jest.fn().mockResolvedValue({
        assignedBookingIds: [],
        deferred: [],
        issues: [],
        violations: [],
      }),
    };

    const bookingRepo = {
      findOne: jest.fn().mockResolvedValue(paidBooking),
      update: jest.fn().mockResolvedValue(undefined),
    };
    dataSource = {
      getRepository: jest.fn().mockReturnValue(bookingRepo),
      transaction: jest.fn(async (fn: (m: unknown) => Promise<void>) => {
        const manager = {
          getRepository: () => bookingRepo,
        };
        await fn(manager);
      }),
    };

    service = new BookingBatchService(
      dataSource as never,
      bookingsRepository as never,
      trainSchedulesRepository as never,
      trainScheduleBookingsRepository as never,
      { payNow: jest.fn(), secured: jest.fn(), expired: jest.fn() } as never,
      { addTimeout: jest.fn(), deleteTimeout: jest.fn(), doesExist: jest.fn() } as never,
      trainSchedulingService as never,
    );
  });

  it('reconcilePaidUnlinked links PAID bookings without a schedule row', async () => {
    bookingsRepository.findPaidUnlinkedForSchedule.mockResolvedValue([paidBooking]);

    await service.reconcilePaidUnlinked(scheduleId);

    expect(bookingsRepository.findPaidUnlinkedForSchedule).toHaveBeenCalledWith(scheduleId);
    expect(trainScheduleBookingsRepository.createMany).toHaveBeenCalledWith(
      [{ trainScheduleId: scheduleId, bookingId }],
      expect.anything(),
    );
  });

  it('ensurePaidBookingAllocated links PAID booking when not yet linked', async () => {
    await service.ensurePaidBookingAllocated(bookingId);

    expect(trainScheduleBookingsRepository.createMany).toHaveBeenCalledTimes(1);
    expect(trainSchedulingService.tryAutoWagonAllocation).toHaveBeenCalledWith(scheduleId);
  });

  it('ensurePaidBookingAllocated is idempotent when already linked', async () => {
    trainScheduleBookingsRepository.existsForBooking.mockResolvedValue(true);

    await service.ensurePaidBookingAllocated(bookingId);
    await service.ensurePaidBookingAllocated(bookingId);

    expect(trainScheduleBookingsRepository.createMany).not.toHaveBeenCalled();
    expect(trainSchedulingService.tryAutoWagonAllocation).toHaveBeenCalledTimes(2);
  });

  it('processSchedule reconciles PAID-unlinked before wagon allocation', async () => {
    const fillSpy = jest.spyOn(service, 'fillSchedule').mockResolvedValue(undefined);
    const settleSpy = jest.spyOn(service, 'settleDueReservations').mockResolvedValue(undefined);
    const reconcileSpy = jest.spyOn(service, 'reconcilePaidUnlinked').mockResolvedValue(undefined);

    await service.processSchedule(scheduleId);

    expect(fillSpy).toHaveBeenCalledWith(scheduleId);
    expect(settleSpy).toHaveBeenCalledWith(scheduleId);
    expect(reconcileSpy).toHaveBeenCalledWith(scheduleId);
    expect(trainSchedulingService.tryAutoWagonAllocation).toHaveBeenCalledWith(scheduleId);

    const fillOrder = fillSpy.mock.invocationCallOrder[0];
    const reconcileOrder = reconcileSpy.mock.invocationCallOrder[0];
    const wagonOrder = trainSchedulingService.tryAutoWagonAllocation.mock.invocationCallOrder[0];
    expect(fillOrder).toBeLessThan(reconcileOrder);
    expect(reconcileOrder).toBeLessThan(wagonOrder);
  });
});