/**
 * Reservations + accommodations module e2e — exercises both migrated mounts
 * through the real JwtAuthGuard against a temp SQLite db. Reservation SQL runs
 * for real (ReservationsService is DI-native, no mock — the temp db carries the
 * full schema via createTables + runMigrations), and so does the accommodation
 * SQL (the injected DaysService is DI-native too); the budget service, the
 * permission check and the WebSocket broadcast stay mocked.
 */
import { TrekExceptionFilter } from '../../src/nest/common/trek-exception.filter';
import { ZodValidationPipe } from '../../src/nest/common/zod-validation.pipe';
import { ReservationsModule } from '../../src/nest/reservations/reservations.module';
// Accommodations left reservations/ for a domain of their own; this container has
// to assemble both or the /accommodations cases below 404 while production serves them.
import { AccommodationsModule } from '../../src/nest/accommodations/accommodations.module';
import { sessionCookie } from './harness';
import { DatabaseModule } from '../../src/nest/database/database.module';
import { RealtimeModule } from '../../src/nest/realtime/realtime.module';
import { Test } from '@nestjs/testing';

import cookieParser from 'cookie-parser';
import type { Server } from 'http';
import request from 'supertest';
import { describe, it, expect, beforeAll, afterAll, beforeEach, vi, type MockInstance } from 'vitest';

const { db } = vi.hoisted(() => {
  // eslint-disable-next-line @typescript-eslint/no-require-imports
  const Database = require('better-sqlite3');
  const tmp = new Database(':memory:');
  tmp.exec('PRAGMA journal_mode = WAL');
  // What production runs (db/database.ts) and what createTestDb gives every
  // unit suite. Without it the reservation foreign keys are inert here, and an
  // id that resolves to nothing passes the mount unnoticed.
  tmp.exec('PRAGMA foreign_keys = ON');
  return { db: tmp };
});

const { canAccessTrip } = vi.hoisted(() => ({ canAccessTrip: vi.fn() }));
vi.mock('../../src/db/database', () => ({
  db,
  canAccessTrip,
  isOwner: vi.fn(() => true),
  getPlaceWithTags: vi.fn(),
  closeDb: () => {},
  reinitialize: () => {},
}));
vi.mock('../../src/websocket', () => ({ broadcast: vi.fn() }));
const { notificationSend } = vi.hoisted(() => ({ notificationSend: vi.fn().mockResolvedValue(undefined) }));
import { PermissionsService } from '../../src/nest/permissions/permissions.service';

// Since the permissions DI migration, the check is a spy on the container's
// PermissionsService singleton (created in beforeAll, after build()).
let checkPermission: MockInstance;

// The budget-sync seam runs the real injected BudgetService (BudgetModule is
// imported by ReservationsModule since the budget fold) over the same temp db.

import { createTables } from '../../src/db/schema';
import { runMigrations } from '../../src/db/migrations';
import { NotificationsService } from '../../src/nest/notifications/notifications.service';
import { ExchangeRatesService } from '../../src/nest/budget/exchange-rates.service';

describe('Reservations + accommodations e2e (real auth guard + temp SQLite, real reservation SQL)', () => {
  let server: Server;
  let app: Awaited<ReturnType<typeof build>>;
  let tripId: number;

  async function build() {
    const moduleRef = await Test.createTestingModule({ imports: [DatabaseModule, RealtimeModule, ReservationsModule, AccommodationsModule] })
      .overrideProvider(NotificationsService)
      .useValue({ send: notificationSend })
      // A price quoted in a foreign currency freezes the rate of the day; this is that
      // day's table, so no case ever reaches the network.
      .overrideProvider(ExchangeRatesService)
      .useValue({ getRates: async (base: string) => (base.toUpperCase() === 'EUR' ? { EUR: 1, USD: 1.17 } : null) })
      .compile();
    const nest = moduleRef.createNestApplication();
    nest.use(cookieParser());
    nest.useGlobalFilters(new TrekExceptionFilter());
    nest.useGlobalPipes(new ZodValidationPipe());
    await nest.init();
    return nest;
  }

  beforeAll(async () => {
    createTables(db);
    runMigrations(db);
    // The temp db carries the real schema (password_hash NOT NULL), so seed the
    // auth user directly instead of via the trimmed-DDL seedUser helper.
    db.prepare(
      "INSERT INTO users (id, username, email, password_hash, role, password_version) VALUES (1, 'e2e-user', 'e2e@example.test', 'x', 'user', 0)",
    ).run();
    tripId = Number(db.prepare("INSERT INTO trips (user_id, title) VALUES (1, 'E2E Trip')").run().lastInsertRowid);
    app = await build();
    checkPermission = vi.spyOn(app.get(PermissionsService), 'checkPermission');
    server = app.getHttpServer();
  });

  beforeEach(() => {
    canAccessTrip.mockImplementation((id: unknown) => db.prepare('SELECT * FROM trips WHERE id = ?').get(id));
    checkPermission.mockReturnValue(true);
    notificationSend.mockClear();
  });

  afterAll(async () => {
    await app.close();
  });

  it('401 without a cookie (reservations)', async () => {
    expect((await request(server).get(`/api/trips/${tripId}/reservations`)).status).toBe(401);
  });

  it('200 list reservations (real SQL, joins attached)', async () => {
    const rid = db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Hotel', 'hotel')").run(tripId).lastInsertRowid;
    const res = await request(server).get(`/api/trips/${tripId}/reservations`).set('Cookie', sessionCookie(1));
    expect(res.status).toBe(200);
    const row = res.body.reservations.find((r: { id: number }) => r.id === Number(rid));
    expect(row).toMatchObject({ title: 'Hotel', type: 'hotel', endpoints: [], travelers: [] });
  });

  it('401 without a cookie (upcoming feed)', async () => {
    expect((await request(server).get('/api/reservations/upcoming')).status).toBe(401);
  });

  it('200 cross-trip upcoming reservations feed, without the hotels (#1934)', async () => {
    db.prepare("INSERT INTO reservations (trip_id, title, type, reservation_time) VALUES (?, 'Flight', 'flight', '2999-01-01T10:00:00')").run(tripId);
    db.prepare("INSERT INTO reservations (trip_id, title, type, reservation_time) VALUES (?, 'Stay', 'hotel', '2999-01-01T09:00:00')").run(tripId);
    const res = await request(server).get('/api/reservations/upcoming').set('Cookie', sessionCookie(1));
    expect(res.status).toBe(200);
    const titles = res.body.reservations.map((r: { title: string }) => r.title);
    expect(titles).toContain('Flight');
    expect(titles).not.toContain('Stay');
  });

  it('404 when trip not accessible (reservations)', async () => {
    canAccessTrip.mockReturnValue(undefined);
    const res = await request(server).get(`/api/trips/${tripId}/reservations`).set('Cookie', sessionCookie(1));
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
  });

  it('201 create keeps an imported price in the currency it was quoted in, at a frozen rate (#2525)', async () => {
    const res = await request(server)
      .post(`/api/trips/${tripId}/reservations`)
      .set('Cookie', sessionCookie(1))
      .send({
        title: 'Aparthotel Silver', type: 'hotel',
        metadata: { price: '801.76', priceCurrency: 'USD' },
        create_budget_entry: { total_price: 801.76, category: 'accommodation', currency: 'USD' },
      });
    expect(res.status).toBe(201);
    // It used to land as 801.76 with no currency, which is 801.76 of the trip's euros.
    const item = db.prepare('SELECT total_price, currency, exchange_rate FROM budget_items WHERE reservation_id = ?').get(res.body.reservation.id);
    expect(item).toEqual({ total_price: 801.76, currency: 'USD', exchange_rate: 1.17 });
  });

  it('201 create leaves a price without a currency in the trip currency, as before', async () => {
    const res = await request(server)
      .post(`/api/trips/${tripId}/reservations`)
      .set('Cookie', sessionCookie(1))
      .send({ title: 'Museum', type: 'event', create_budget_entry: { total_price: 20, currency: 'not a code' } });
    expect(res.status).toBe(201);
    const item = db.prepare('SELECT total_price, currency, exchange_rate FROM budget_items WHERE reservation_id = ?').get(res.body.reservation.id);
    expect(item).toEqual({ total_price: 20, currency: null, exchange_rate: 1 });
  });

  it('201 create reservation (real insert + booking notification), 400 without title', async () => {
    const ok = await request(server)
      .post(`/api/trips/${tripId}/reservations`)
      .set('Cookie', sessionCookie(1))
      .send({ title: 'Hotel' });
    expect(ok.status).toBe(201);
    expect(ok.body.reservation).toMatchObject({ title: 'Hotel', type: 'other', status: 'pending' });
    expect(db.prepare('SELECT title FROM reservations WHERE id = ?').get(ok.body.reservation.id)).toEqual({ title: 'Hotel' });
    // The fire-and-forget booking notification reaches the (mocked) notification service.
    await vi.waitFor(() => expect(notificationSend).toHaveBeenCalled());
    expect(notificationSend).toHaveBeenCalledWith(expect.objectContaining({ event: 'booking_change', actorId: 1 }));

    const bad = await request(server).post(`/api/trips/${tripId}/reservations`).set('Cookie', sessionCookie(1)).send({});
    expect(bad.status).toBe(400);
    expect(bad.body.error).toContain('title');
  });

  // The reported repro (#2355): an id that resolves to nothing used to reach
  // the statement and come back as an unhandled SqliteError, i.e. a bare 500.
  it('400 on an update whose place_id exists nowhere, and the row is left alone', async () => {
    const rid = Number(db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Dinner', 'other')").run(tripId).lastInsertRowid);

    const res = await request(server)
      .put(`/api/trips/${tripId}/reservations/${rid}`)
      .set('Cookie', sessionCookie(1))
      .send({ title: 'Dinner, later', place_id: 999999 });

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'Unknown reference: place_id' });
    expect(db.prepare('SELECT title, place_id FROM reservations WHERE id = ?').get(rid)).toEqual({ title: 'Dinner', place_id: null });
  });

  it('400 on a create whose create_accommodation day exists nowhere, and no stay is written', async () => {
    const placeId = Number(db.prepare('INSERT INTO places (trip_id, name) VALUES (?, ?)').run(tripId, 'Hotel Unknown').lastInsertRowid);
    const dayId = Number(db.prepare('INSERT INTO days (trip_id, day_number, date) VALUES (?, 7, ?)').run(tripId, '2026-03-07').lastInsertRowid);
    const before = db.prepare('SELECT COUNT(*) as c FROM day_accommodations WHERE trip_id = ?').get(tripId);

    const res = await request(server)
      .post(`/api/trips/${tripId}/reservations`)
      .set('Cookie', sessionCookie(1))
      .send({ title: 'Stay', type: 'hotel', create_accommodation: { place_id: placeId, start_day_id: dayId, end_day_id: 999999 } });

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'Unknown reference: create_accommodation.end_day_id' });
    expect(db.prepare('SELECT COUNT(*) as c FROM day_accommodations WHERE trip_id = ?').get(tripId)).toEqual(before);
  });

  // #522, which must survive all of the above: shortening a trip cascades the
  // stay away and leaves the booking pointing at a gap, and the booking still
  // has to be savable.
  it('200 on an update whose stored accommodation_id no longer resolves', async () => {
    const rid = Number(
      db.prepare("INSERT INTO reservations (trip_id, title, type, accommodation_id) VALUES (?, 'Stay', 'hotel', 999999)").run(tripId).lastInsertRowid,
    );

    const res = await request(server)
      .put(`/api/trips/${tripId}/reservations/${rid}`)
      .set('Cookie', sessionCookie(1))
      .send({ title: 'Stay, renamed', accommodation_id: 999999 });

    expect(res.status).toBe(200);
    expect(db.prepare('SELECT title, accommodation_id FROM reservations WHERE id = ?').get(rid))
      .toEqual({ title: 'Stay, renamed', accommodation_id: null });
  });

  it('200 list accommodations + 201 create (real insert + auto hotel reservation), 404 on bad refs', async () => {
    const placeId = Number(db.prepare('INSERT INTO places (trip_id, name) VALUES (?, ?)').run(tripId, 'Grand Hotel').lastInsertRowid);
    const dayId = Number(db.prepare('INSERT INTO days (trip_id, day_number, date) VALUES (?, 1, ?)').run(tripId, '2026-03-01').lastInsertRowid);
    const create = await request(server)
      .post(`/api/trips/${tripId}/accommodations`)
      .set('Cookie', sessionCookie(1))
      .send({ place_id: placeId, start_day_id: dayId, end_day_id: dayId, check_in: '15:00' });
    expect(create.status).toBe(201);
    expect(create.body.accommodation).toMatchObject({ place_id: placeId, start_day_id: dayId, end_day_id: dayId, place_name: 'Grand Hotel' });
    // The partner hotel reservation is auto-created by the real DaysService SQL.
    const linked = db.prepare('SELECT * FROM reservations WHERE accommodation_id = ?').get(create.body.accommodation.id) as { type: string; status: string };
    expect(linked).toMatchObject({ type: 'hotel', status: 'confirmed' });
    const list = await request(server).get(`/api/trips/${tripId}/accommodations`).set('Cookie', sessionCookie(1));
    expect(list.status).toBe(200);
    expect(list.body.accommodations).toHaveLength(1);
    expect(list.body.accommodations[0]).toMatchObject({ id: create.body.accommodation.id, place_name: 'Grand Hotel' });
    const badRefs = await request(server)
      .post(`/api/trips/${tripId}/accommodations`)
      .set('Cookie', sessionCookie(1))
      .send({ place_id: 99999, start_day_id: dayId, end_day_id: dayId });
    expect(badRefs.status).toBe(404);
    expect(badRefs.body).toEqual({ error: 'Place not found' });
  });

  it('201 create also puts the place on its check-in day, and the delete takes that stop back', async () => {
    // The road-trip view builds its stops from day_assignments and only looks the stay
    // up afterwards, so a booking without one never reaches the route: the complaint
    // was having to enter the same hotel a second time as an ordinary place.
    const placeId = Number(db.prepare('INSERT INTO places (trip_id, name) VALUES (?, ?)').run(tripId, 'Hotel Adlon').lastInsertRowid);
    const dayId = Number(db.prepare('INSERT INTO days (trip_id, day_number, date) VALUES (?, 4, ?)').run(tripId, '2026-03-04').lastInsertRowid);

    const create = await request(server)
      .post(`/api/trips/${tripId}/accommodations`)
      .set('Cookie', sessionCookie(1))
      .send({ place_id: placeId, start_day_id: dayId, end_day_id: dayId });
    expect(create.status).toBe(201);
    // In the answer, not only on the socket: the broadcast skips the sender.
    expect(create.body.assignment).toMatchObject({ day_id: dayId, place_id: placeId });
    expect(db.prepare('SELECT stop_type FROM places WHERE id = ?').get(placeId)).toMatchObject({ stop_type: 'hotel' });

    const del = await request(server)
      .delete(`/api/trips/${tripId}/accommodations/${create.body.accommodation.id}`)
      .set('Cookie', sessionCookie(1));
    expect(del.status).toBe(200);
    expect(del.body.removedAssignments).toEqual([{ id: create.body.assignment.id, dayId }]);
    expect(db.prepare('SELECT id FROM day_assignments WHERE day_id = ?').all(dayId)).toEqual([]);
  });

  it('404 when trip not accessible (accommodations)', async () => {
    canAccessTrip.mockReturnValue(undefined);
    const res = await request(server).get(`/api/trips/${tripId}/accommodations`).set('Cookie', sessionCookie(1));
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
  });

  it('400 accommodation create without refs', async () => {
    const res = await request(server)
      .post(`/api/trips/${tripId}/accommodations`)
      .set('Cookie', sessionCookie(1))
      .send({ place_id: 2 });
    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'place_id, start_day_id, and end_day_id are required' });
  });

  // The per-day branch of updatePositions used to bind the caller's ids straight
  // into reservation_day_positions without ever looking at the tripId it was
  // handed, so a request authorised on your own trip could rewrite the ordering
  // of someone else's. The legacy branch three lines below it always scoped by
  // trip_id — these pin that the two behave the same way now.
  describe('positions are confined to the trip in the URL', () => {
    let foreignTripId: number;
    let foreignReservationId: number;
    let foreignDayId: number;
    let ownDayId: number;
    // Days are unique per (trip_id, day_number) and this block seeds a fresh pair
    // for every case, so the numbers have to keep climbing.
    let dayNumber = 100;

    beforeEach(() => {
      db.prepare(
        "INSERT OR IGNORE INTO users (id, username, email, password_hash, role, password_version) VALUES (2, 'victim', 'victim@example.test', 'x', 'user', 0)",
      ).run();
      foreignTripId = Number(db.prepare("INSERT INTO trips (user_id, title) VALUES (2, 'Someone else')").run().lastInsertRowid);
      foreignReservationId = Number(db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Secret', 'other')").run(foreignTripId).lastInsertRowid);
      dayNumber += 1;
      foreignDayId = Number(db.prepare("INSERT INTO days (trip_id, day_number, date) VALUES (?, ?, '2026-05-01')").run(foreignTripId, dayNumber).lastInsertRowid);
      ownDayId = Number(db.prepare("INSERT INTO days (trip_id, day_number, date) VALUES (?, ?, '2026-05-01')").run(tripId, dayNumber).lastInsertRowid);
    });

    function positionRow(reservationId: number, dayId: number) {
      return db.prepare('SELECT position FROM reservation_day_positions WHERE reservation_id = ? AND day_id = ?').get(reservationId, dayId);
    }

    it('writes nothing when both ids belong to another trip', async () => {
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: foreignReservationId, day_plan_position: 999 }], day_id: foreignDayId });
      expect(res.status).toBe(200);
      expect(positionRow(foreignReservationId, foreignDayId)).toBeUndefined();
    });

    it('writes nothing when only the reservation is foreign', async () => {
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: foreignReservationId, day_plan_position: 5 }], day_id: ownDayId });
      expect(res.status).toBe(200);
      expect(positionRow(foreignReservationId, ownDayId)).toBeUndefined();
    });

    it('writes nothing when only the day is foreign', async () => {
      const ownReservationId = Number(db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Mine', 'other')").run(tripId).lastInsertRowid);
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: ownReservationId, day_plan_position: 5 }], day_id: foreignDayId });
      expect(res.status).toBe(200);
      expect(positionRow(ownReservationId, foreignDayId)).toBeUndefined();
    });

    it('still stores a position when both ids are on the trip', async () => {
      const ownReservationId = Number(db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Mine', 'other')").run(tripId).lastInsertRowid);
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: ownReservationId, day_plan_position: 3 }], day_id: ownDayId });
      expect(res.status).toBe(200);
      expect(positionRow(ownReservationId, ownDayId)).toEqual({ position: 3 });
    });

    // An id that exists nowhere used to raise a foreign-key error, which the
    // exception filter turned into a 500 — telling the caller apart from the
    // 200 a real id returns, for any id on the instance.
    it('answers a nonexistent reservation the same way it answers a foreign one', async () => {
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: 999999, day_plan_position: 1 }], day_id: ownDayId });
      expect(res.status).toBe(200);
    });

    it('does not fall over when day_plan_position is omitted', async () => {
      const ownReservationId = Number(db.prepare("INSERT INTO reservations (trip_id, title, type) VALUES (?, 'Mine', 'other')").run(tripId).lastInsertRowid);
      const res = await request(server)
        .put(`/api/trips/${tripId}/reservations/positions`)
        .set('Cookie', sessionCookie(1))
        .send({ positions: [{ id: ownReservationId }], day_id: ownDayId });
      expect(res.status).toBe(200);
    });
  });
});