import { ReportsService } from './reports.service';

/**
 * Covers the blocked-seat half of the seat status report.
 *
 * The count used to be a raw `SeatBlock` row count with an exact `type === 'dining'`
 * exclusion. Real EDR data stores display names in `CoachType.type` ('Dining Coach '),
 * so dining seats slipped through, and every global block counted even when its coach
 * never joined the train. These cases pin the corrected rule.
 */

const SCHEDULE_ID = 'sched-1';
const DEPARTURE = new Date('2026-03-10T06:00:00.000Z');

interface CoachSpec {
  id: string;
  number: string;
  typeType?: string;
  typeName?: string;
}

const passengerCoach: CoachSpec = { id: 'coach-1', number: 'C1' };
const diningCoach: CoachSpec = {
  id: 'coach-dining',
  number: 'D1',
  // As the data actually looks: display name in `type`, trailing space included.
  typeType: 'Dining Coach ',
  typeName: 'Dining Coach',
};

function seatRow(
  id: string,
  coach: CoachSpec,
  seatNumber: string,
  bedPosition: string | null = null,
) {
  return {
    id,
    coachId: coach.id,
    seatNumber,
    bedPosition,
    coach: {
      number: coach.number,
      coachType: {
        name: coach.typeName ?? 'Standard',
        type: coach.typeType ?? 'passenger',
        seatClasses: [{ name: 'Economy', bedPosition: null }],
      },
    },
  };
}

function blockRow(
  overrides: Partial<{
    id: string;
    scheduleId: string | null;
    reason: string;
    blockedAt: Date;
    unblockAt: Date | null;
    seat: ReturnType<typeof seatRow>;
  }> = {},
) {
  return {
    id: 'block-1',
    scheduleId: SCHEDULE_ID as string | null,
    reason: 'VIP hold',
    blockedBy: 'user-1',
    blockedAt: new Date('2026-03-01T00:00:00.000Z'),
    unblockAt: null as Date | null,
    seat: seatRow('seat-1', passengerCoach, '1'),
    ...overrides,
  };
}

function makeService(opts: {
  blocks: ReturnType<typeof blockRow>[];
  assignedCoachIds?: string[];
  departureAt?: Date | null;
  bookingSeats?: any[];
}) {
  const prisma = {
    bookingSeat: { findMany: jest.fn().mockResolvedValue(opts.bookingSeats ?? []) },
    seatHold: { findMany: jest.fn().mockResolvedValue([]) },
    trainSchedule: {
      findUnique: jest.fn().mockResolvedValue(
        opts.departureAt === null ? null : { departureAt: opts.departureAt ?? DEPARTURE },
      ),
    },
    coachAssignment: {
      findMany: jest
        .fn()
        .mockResolvedValue(
          (opts.assignedCoachIds ?? [passengerCoach.id, diningCoach.id]).map((coachId) => ({
            coachId,
          })),
        ),
    },
    seatBlock: { findMany: jest.fn().mockResolvedValue(opts.blocks) },
  };

  return {
    service: new ReportsService(prisma as any, {} as any, {} as any),
    prisma,
  };
}

describe('getSeatStatusReport — blocked seats', () => {
  it('counts a schedule-scoped block on a passenger coach', async () => {
    const { service } = makeService({ blocks: [blockRow()] });

    const report = await service.getSeatStatusReport(SCHEDULE_ID);

    expect(report.summary.blockedCount).toBe(1);
    expect(report.blockedSeats).toHaveLength(1);
    expect(report.blockedSeats[0]).toMatchObject({ coachNumber: 'C1', seatNumber: '1' });
  });

  it('leaves out a dining coach whose type carries a display name', async () => {
    const { service } = makeService({
      blocks: [blockRow({ seat: seatRow('seat-d', diningCoach, '1') })],
    });

    const report = await service.getSeatStatusReport(SCHEDULE_ID);

    expect(report.summary.blockedCount).toBe(0);
    expect(report.blockedSeats).toEqual([]);
  });

  it('leaves out placeholder seats', async () => {
    const { service } = makeService({
      blocks: [blockRow({ seat: seatRow('seat-p', passengerCoach, '-1') })],
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(0);
  });

  it('counts a global block on a coach assigned to this train', async () => {
    const { service } = makeService({
      blocks: [blockRow({ scheduleId: null })],
      assignedCoachIds: [passengerCoach.id],
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(1);
  });

  it('ignores a global block whose coach never joined this train', async () => {
    const { service } = makeService({
      blocks: [blockRow({ scheduleId: null })],
      assignedCoachIds: ['some-other-coach'],
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(0);
  });

  it('ignores a global block that had already been lifted by departure', async () => {
    const { service } = makeService({
      blocks: [
        blockRow({
          scheduleId: null,
          unblockAt: new Date('2026-03-05T00:00:00.000Z'),
        }),
      ],
      assignedCoachIds: [passengerCoach.id],
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(0);
  });

  it('ignores a global block created after departure', async () => {
    const { service } = makeService({
      blocks: [blockRow({ scheduleId: null, blockedAt: new Date('2026-03-20T00:00:00.000Z') })],
      assignedCoachIds: [passengerCoach.id],
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(0);
  });

  it('counts a seat blocked both globally and for this schedule once', async () => {
    const seat = seatRow('seat-1', passengerCoach, '1');
    const { service } = makeService({
      blocks: [
        blockRow({ id: 'block-schedule', seat, reason: 'Crew seat' }),
        blockRow({ id: 'block-global', scheduleId: null, seat, reason: 'Broken armrest' }),
      ],
      assignedCoachIds: [passengerCoach.id],
    });

    const report = await service.getSeatStatusReport(SCHEDULE_ID);

    expect(report.summary.blockedCount).toBe(1);
    // The schedule-scoped block is the more specific statement, so it is the one shown.
    expect(report.blockedSeats[0].reason).toBe('Crew seat');
  });

  it('reports nothing blocked when the schedule does not exist', async () => {
    const { service } = makeService({
      blocks: [blockRow({ scheduleId: null })],
      departureAt: null,
    });

    expect((await service.getSeatStatusReport(SCHEDULE_ID)).summary.blockedCount).toBe(0);
  });

  it('asks the database only for non-maintenance, non-ticketing blocks', async () => {
    const { service, prisma } = makeService({ blocks: [] });

    await service.getSeatStatusReport(SCHEDULE_ID);

    const where = prisma.seatBlock.findMany.mock.calls[0][0].where;
    expect(where.NOT).toEqual([
      { reason: { startsWith: 'MAINTENANCE:' } },
      { reason: { startsWith: 'Booked in tickets' } },
    ]);
  });
});

describe('getSeatStatusReport — booked seats', () => {
  const booking = {
    bookingRef: 'BK-1',
    status: 'CONFIRMED',
    totalMinor: 20000,
    currency: 'ETB',
    createdAt: new Date('2026-03-01T00:00:00.000Z'),
    paymentIntent: { status: 'SUCCEEDED' },
  };

  it('keeps dining-coach seats out of the paid and unpaid counts', async () => {
    const { service } = makeService({
      blocks: [],
      bookingSeats: [
        {
          passengerName: 'Abebe',
          passengerCategory: 'ADULT',
          fareMinor: 20000,
          booking,
          seat: seatRow('seat-1', passengerCoach, '1'),
        },
        {
          passengerName: 'Diner',
          passengerCategory: 'ADULT',
          fareMinor: 0,
          booking,
          seat: seatRow('seat-d', diningCoach, '1'),
        },
        {
          passengerName: 'Kebede',
          passengerCategory: 'ADULT',
          fareMinor: 20000,
          booking: { ...booking, status: 'PENDING_PAYMENT', paymentIntent: null },
          seat: seatRow('seat-2', passengerCoach, '2'),
        },
      ],
    });

    const report = await service.getSeatStatusReport(SCHEDULE_ID);

    expect(report.summary.paidCount).toBe(1);
    expect(report.summary.unpaidCount).toBe(1);
    expect(report.paidSeats.map((s) => s.passengerName)).toEqual(['Abebe']);
  });
});