/**
 * Days & Accommodations API integration tests.
 * Covers DAY-001 through DAY-013 and ACCOM-001 through ACCOM-006.
 */
import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';
import request from 'supertest';
import type { Application } from 'express';
import type { INestApplication } from '@nestjs/common';

// ─────────────────────────────────────────────────────────────────────────────
// In-memory DB — schema applied in beforeAll after mocks register
// ─────────────────────────────────────────────────────────────────────────────
vi.mock('../../src/db/database', async () => {
  const { createSnapshotTestDb, buildDbMock } = await import('../helpers/db-mock');
  return buildDbMock(createSnapshotTestDb());
});
vi.mock('../../src/config', () => ({
  JWT_SECRET: 'test-jwt-secret-for-trek-testing-only',
  ENCRYPTION_KEY: 'a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2',
  updateJwtSecret: () => {},
  SESSION_DURATION: '24h',
  SESSION_DURATION_MS: 86400000,
  SESSION_DURATION_SECONDS: 86400,
  DEFAULT_LANGUAGE: 'en',
}));
vi.mock('../../src/websocket', () => ({ broadcast: vi.fn(), broadcastToUser: vi.fn() }));

import { db as testDb } from '../../src/db/database';
import { buildApp } from '../../src/bootstrap';
import { resetTestDb, resetRateLimits } from '../helpers/test-db';
import { createUser, createTrip, createDay, createPlace, addTripMember, createDayAccommodation, createReservation } from '../helpers/factories';
import { authCookie } from '../helpers/auth';

let nestApp: INestApplication;
let app: Application;
beforeAll(async () => {
  nestApp = await buildApp();
  app = nestApp.getHttpAdapter().getInstance();
});
beforeEach(() => { resetTestDb(testDb); resetRateLimits(nestApp); });
afterAll(async () => {
  await nestApp.close();
  testDb.close();
});

// ─────────────────────────────────────────────────────────────────────────────
// List days (DAY-001, DAY-002)
// ─────────────────────────────────────────────────────────────────────────────

describe('List days', () => {
  it('DAY-001 — GET /api/trips/:tripId/days returns days for a trip the user can access', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Paris Trip', start_date: '2026-06-01', end_date: '2026-06-03' });

    const res = await request(app)
      .get(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.days).toBeDefined();
    expect(Array.isArray(res.body.days)).toBe(true);
    expect(res.body.days).toHaveLength(3);
  });

  it('DAY-001 — Member can list days for a shared trip', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Shared Trip', start_date: '2026-07-01', end_date: '2026-07-02' });
    addTripMember(testDb, trip.id, member.id);

    const res = await request(app)
      .get(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(member.id));

    expect(res.status).toBe(200);
    expect(res.body.days).toHaveLength(2);
  });

  it('DAY-002 — Non-member cannot list days (404)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Private Trip' });

    const res = await request(app)
      .get(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(stranger.id));

    expect(res.status).toBe(404);
  });

  it('DAY-002 — Unauthenticated request returns 401', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });

    const res = await request(app).get(`/api/trips/${trip.id}/days`);
    expect(res.status).toBe(401);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Create day (DAY-006, DAY-011 to DAY-013)
// ─────────────────────────────────────────────────────────────────────────────

describe('Create day', () => {
  it('DAY-006 — POST /api/trips/:tripId/days creates a standalone day with no date', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Open Trip' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ notes: 'A free day' });

    expect(res.status).toBe(201);
    expect(res.body.day).toBeDefined();
    expect(res.body.day.trip_id).toBe(trip.id);
    expect(res.body.day.date).toBeNull();
    expect(res.body.day.notes).toBe('A free day');
  });

  it('DAY-006 — POST /api/trips/:tripId/days creates a day with a date', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Dated Trip' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ date: '2026-08-15' });

    expect(res.status).toBe(201);
    expect(res.body.day.date).toBe('2026-08-15');
  });

  it('DAY-006 — Non-member cannot create a day (404)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Private' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(stranger.id))
      .send({ notes: 'Infiltration' });

    expect(res.status).toBe(404);
  });

  it('DAY-011: a dated create adds the next date behind the dated days, and the trip ends on it', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-08-01', end_date: '2026-08-02' });
    const spare = createDay(testDb, trip.id);

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ dated: true });

    expect(res.status).toBe(201);
    expect(res.body.day).toMatchObject({ trip_id: trip.id, day_number: 3, date: '2026-08-03' });
    expect(res.body.trip).toMatchObject({ id: trip.id, end_date: '2026-08-03', day_count: 4 });
    expect(res.body.trip).not.toHaveProperty('feed_token', expect.anything());
    const reread = await request(app).get(`/api/trips/${trip.id}`).set('Cookie', authCookie(user.id));
    expect(reread.body.trip).toMatchObject({ start_date: '2026-08-01', end_date: '2026-08-03' });
    const list = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(user.id));
    expect(list.body.days.map((d: { id: number; date: string | null }) => [d.id, d.date])).toEqual([
      [expect.any(Number), '2026-08-01'],
      [expect.any(Number), '2026-08-02'],
      [res.body.day.id, '2026-08-03'],
      [spare.id, null],
    ]);
  });

  it('DAY-012: a dated create on a trip without dates is refused with 400 and adds nothing', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Open Trip' });
    createDay(testDb, trip.id);

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ dated: true });

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'This trip has no dates. Add a day without a date instead.' });
    expect(testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id)).toEqual({ n: 1 });
  });

  it('DAY-013: dated next to a position is refused by the contract with 400 and adds nothing', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-08-01', end_date: '2026-08-02' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ dated: true, position: 1 });

    expect(res.status).toBe(400);
    expect(JSON.stringify(res.body)).toContain('dated cannot be combined with date or position');
    expect(testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id)).toEqual({ n: 2 });
    expect(testDb.prepare('SELECT end_date FROM trips WHERE id = ?').get(trip.id)).toEqual({ end_date: '2026-08-02' });
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Update day (DAY-003, DAY-004)
// ─────────────────────────────────────────────────────────────────────────────

describe('Update day', () => {
  it('DAY-003 — PUT /api/trips/:tripId/days/:dayId updates the day title', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'My Trip' });
    const day = createDay(testDb, trip.id, { title: 'Old Title' });

    const res = await request(app)
      .put(`/api/trips/${trip.id}/days/${day.id}`)
      .set('Cookie', authCookie(user.id))
      .send({ title: 'New Title' });

    expect(res.status).toBe(200);
    expect(res.body.day).toBeDefined();
    expect(res.body.day.title).toBe('New Title');
  });

  it('DAY-004 — PUT /api/trips/:tripId/days/:dayId updates the day notes', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'My Trip' });
    const day = createDay(testDb, trip.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/days/${day.id}`)
      .set('Cookie', authCookie(user.id))
      .send({ notes: 'Visit the Louvre' });

    expect(res.status).toBe(200);
    expect(res.body.day.notes).toBe('Visit the Louvre');
  });

  it('DAY-003 — PUT returns 404 for a day that does not belong to the trip', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'My Trip' });
    createDay(testDb, trip.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/days/999999`)
      .set('Cookie', authCookie(user.id))
      .send({ title: 'Ghost' });

    expect(res.status).toBe(404);
    expect(res.body.error).toMatch(/not found/i);
  });

  it('DAY-003 — Non-member cannot update a day (404)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Private' });
    const day = createDay(testDb, trip.id, { title: 'Original' });

    const res = await request(app)
      .put(`/api/trips/${trip.id}/days/${day.id}`)
      .set('Cookie', authCookie(stranger.id))
      .send({ title: 'Hacked' });

    expect(res.status).toBe(404);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Reorder days (DAY-005)
// ─────────────────────────────────────────────────────────────────────────────

describe('Reorder days', () => {
  it('DAY-005 — Reorder: GET days returns them in day_number order', async () => {
    const { user } = createUser(testDb);
    // Create trip with 3 days auto-generated
    const trip = createTrip(testDb, user.id, {
      title: 'Trip',
      start_date: '2026-09-01',
      end_date: '2026-09-03',
    });

    const res = await request(app)
      .get(`/api/trips/${trip.id}/days`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.days).toHaveLength(3);
    // Days should be ordered by day_number ascending (the service sorts by day_number ASC)
    expect(res.body.days[0].date).toBe('2026-09-01');
    expect(res.body.days[2].date).toBe('2026-09-03');
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Delete day
// ─────────────────────────────────────────────────────────────────────────────

describe('Delete day', () => {
  it('DELETE /api/trips/:tripId/days/:dayId removes the day', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const day = createDay(testDb, trip.id);
    createDay(testDb, trip.id);

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/days/${day.id}`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);

    const deleted = testDb.prepare('SELECT id FROM days WHERE id = ?').get(day.id);
    expect(deleted).toBeUndefined();
  });

  it('DELETE /api/trips/:tripId/days/:dayId returns 404 for unknown day', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/days/999999`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(404);
    expect(res.body.error).toMatch(/not found/i);
  });

  it('DAY-007: the days after a deleted one close up, and the answer carries the trip with its new day count', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const [a, b, c] = [createDay(testDb, trip.id), createDay(testDb, trip.id), createDay(testDb, trip.id)];

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/days/${b.id}`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body).toMatchObject({ success: true, trip: { id: trip.id, day_count: 2 } });
    const list = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(user.id));
    expect(list.body.days.map((d: { id: number; day_number: number }) => [d.id, d.day_number])).toEqual([[a.id, 1], [c.id, 2]]);
  });

  it('DAY-008: deleting a dated day with no day left to take the last date ends the trip a day earlier', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-08-01', end_date: '2026-08-03' });
    const first = testDb.prepare('SELECT id FROM days WHERE trip_id = ? ORDER BY day_number LIMIT 1').get(trip.id) as { id: number };

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/days/${first.id}`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.trip).toMatchObject({ start_date: '2026-08-01', end_date: '2026-08-02' });
    const reread = await request(app).get(`/api/trips/${trip.id}`).set('Cookie', authCookie(user.id));
    expect(reread.body.trip).toMatchObject({ start_date: '2026-08-01', end_date: '2026-08-02' });
    const list = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(user.id));
    expect(list.body.days.map((d: { date: string }) => d.date)).toEqual(['2026-08-01', '2026-08-02']);
  });

  it('DAY-009: the last day of a trip is refused with 400 and stays', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const day = createDay(testDb, trip.id);

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/days/${day.id}`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'A trip needs at least one day.' });
    expect(testDb.prepare('SELECT id FROM days WHERE id = ?').get(day.id)).toBeDefined();
  });

  it('DAY-010: a member without day_edit gets 403 and the day stays', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Trip' });
    addTripMember(testDb, trip.id, member.id);
    const day = createDay(testDb, trip.id);
    createDay(testDb, trip.id);
    testDb.prepare("INSERT OR REPLACE INTO app_settings (key, value) VALUES ('perm_day_edit', 'trip_owner')").run();
    const { invalidatePermissionsCache } = await import('../../src/nest/permissions/permissions-cache');
    invalidatePermissionsCache();
    try {
      const res = await request(app)
        .delete(`/api/trips/${trip.id}/days/${day.id}`)
        .set('Cookie', authCookie(member.id));
      expect(res.status).toBe(403);
      expect(testDb.prepare('SELECT id FROM days WHERE id = ?').get(day.id)).toBeDefined();
    } finally {
      testDb.prepare("DELETE FROM app_settings WHERE key = 'perm_day_edit'").run();
      invalidatePermissionsCache();
    }
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Accommodations (ACCOM-001, ACCOM-002, ACCOM-003)
// ─────────────────────────────────────────────────────────────────────────────

describe('Accommodations', () => {
  it('ACCOM-001 — POST /api/trips/:tripId/accommodations creates an accommodation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-10-01' });
    const day2 = createDay(testDb, trip.id, { date: '2026-10-03' });
    const place = createPlace(testDb, trip.id, { name: 'Grand Hotel' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({
        place_id: place.id,
        start_day_id: day1.id,
        end_day_id: day2.id,
        check_in: '15:00',
        check_out: '11:00',
        confirmation: 'ABC123',
        notes: 'Breakfast included',
      });

    expect(res.status).toBe(201);
    expect(res.body.accommodation).toBeDefined();
    expect(res.body.accommodation.place_id).toBe(place.id);
    expect(res.body.accommodation.start_day_id).toBe(day1.id);
    expect(res.body.accommodation.end_day_id).toBe(day2.id);
    expect(res.body.accommodation.confirmation).toBe('ABC123');
  });

  it('ACCOM-001 — POST missing required fields returns 400', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ notes: 'no ids' });

    expect(res.status).toBe(400);
    expect(res.body.error).toMatch(/required/i);
  });

  it('ACCOM-001 — POST with invalid place_id returns 404', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const day = createDay(testDb, trip.id);

    const res = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: 999999, start_day_id: day.id, end_day_id: day.id });

    expect(res.status).toBe(404);
  });

  it('ACCOM-002 — GET /api/trips/:tripId/accommodations returns accommodations for the trip', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-11-01' });
    const day2 = createDay(testDb, trip.id, { date: '2026-11-03' });
    const place = createPlace(testDb, trip.id, { name: 'Boutique Inn' });

    // Seed accommodation directly
    testDb.prepare(
      'INSERT INTO day_accommodations (trip_id, place_id, start_day_id, end_day_id) VALUES (?, ?, ?, ?)'
    ).run(trip.id, place.id, day1.id, day2.id);

    const res = await request(app)
      .get(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.accommodations).toBeDefined();
    expect(Array.isArray(res.body.accommodations)).toBe(true);
    expect(res.body.accommodations).toHaveLength(1);
    expect(res.body.accommodations[0].place_name).toBe('Boutique Inn');
  });

  it('ACCOM-002 — Non-member cannot get accommodations (404)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { title: 'Private Trip' });

    const res = await request(app)
      .get(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(stranger.id));

    expect(res.status).toBe(404);
  });

  it('ACCOM-003 — DELETE /api/trips/:tripId/accommodations/:id removes accommodation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-12-01' });
    const day2 = createDay(testDb, trip.id, { date: '2026-12-03' });
    const place = createPlace(testDb, trip.id, { name: 'Budget Hostel' });

    const createRes = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: place.id, start_day_id: day1.id, end_day_id: day2.id });

    expect(createRes.status).toBe(201);
    const accommodationId = createRes.body.accommodation.id;

    const deleteRes = await request(app)
      .delete(`/api/trips/${trip.id}/accommodations/${accommodationId}`)
      .set('Cookie', authCookie(user.id));

    expect(deleteRes.status).toBe(200);
    expect(deleteRes.body.success).toBe(true);

    // Verify removed from DB
    const row = testDb.prepare('SELECT id FROM day_accommodations WHERE id = ?').get(accommodationId);
    expect(row).toBeUndefined();
  });

  it('ACCOM-003 — DELETE non-existent accommodation returns 404', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });

    const res = await request(app)
      .delete(`/api/trips/${trip.id}/accommodations/999999`)
      .set('Cookie', authCookie(user.id));

    expect(res.status).toBe(404);
    expect(res.body.error).toMatch(/not found/i);
  });

  it('ACCOM-001 — Creating accommodation also creates a linked reservation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-10-10' });
    const day2 = createDay(testDb, trip.id, { date: '2026-10-12' });
    const place = createPlace(testDb, trip.id, { name: 'Luxury Resort' });

    const res = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: place.id, start_day_id: day1.id, end_day_id: day2.id, confirmation: 'CONF-XYZ' });

    expect(res.status).toBe(201);

    // Linked reservation should exist
    const reservation = testDb.prepare(
      'SELECT * FROM reservations WHERE accommodation_id = ?'
    ).get(res.body.accommodation.id) as any;
    expect(reservation).toBeDefined();
    expect(reservation.type).toBe('hotel');
    expect(reservation.confirmation_number).toBe('CONF-XYZ');
  });

  it('ACCOM-004 — PUT /api/trips/:tripId/accommodations/:id updates the accommodation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-10-20' });
    const day2 = createDay(testDb, trip.id, { date: '2026-10-22' });
    const day3 = createDay(testDb, trip.id, { date: '2026-10-25' });
    const place = createPlace(testDb, trip.id, { name: 'City Inn' });

    const createRes = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: place.id, start_day_id: day1.id, end_day_id: day2.id, notes: 'Original' });

    expect(createRes.status).toBe(201);
    const accommodationId = createRes.body.accommodation.id;

    const updateRes = await request(app)
      .put(`/api/trips/${trip.id}/accommodations/${accommodationId}`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: place.id, start_day_id: day1.id, end_day_id: day3.id, notes: 'Extended stay' });

    expect(updateRes.status).toBe(200);
    expect(updateRes.body.accommodation).toBeDefined();
    expect(updateRes.body.accommodation.end_day_id).toBe(day3.id);
    expect(updateRes.body.accommodation.notes).toBe('Extended stay');
  });

  it('ACCOM-004 — PUT non-existent accommodation returns 404', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });

    const res = await request(app)
      .put(`/api/trips/${trip.id}/accommodations/999999`)
      .set('Cookie', authCookie(user.id))
      .send({ notes: 'Ghost update' });

    expect(res.status).toBe(404);
    expect(res.body.error).toMatch(/not found/i);
  });

  it('ACCOM-003 — Deleting accommodation also removes the linked reservation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-10-15' });
    const day2 = createDay(testDb, trip.id, { date: '2026-10-17' });
    const place = createPlace(testDb, trip.id, { name: 'Mountain Lodge' });

    const createRes = await request(app)
      .post(`/api/trips/${trip.id}/accommodations`)
      .set('Cookie', authCookie(user.id))
      .send({ place_id: place.id, start_day_id: day1.id, end_day_id: day2.id });

    const accommodationId = createRes.body.accommodation.id;
    const reservationBefore = testDb.prepare(
      'SELECT id FROM reservations WHERE accommodation_id = ?'
    ).get(accommodationId) as any;
    expect(reservationBefore).toBeDefined();

    const deleteRes = await request(app)
      .delete(`/api/trips/${trip.id}/accommodations/${accommodationId}`)
      .set('Cookie', authCookie(user.id));
    expect(deleteRes.status).toBe(200);

    const reservationAfter = testDb.prepare(
      'SELECT id FROM reservations WHERE id = ?'
    ).get(reservationBefore.id);
    expect(reservationAfter).toBeUndefined();
  });

  it('ACCOM-006 — DELETE accommodation also removes its linked budget item (issue #933)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Hotel Budget Trip' });
    const day1 = createDay(testDb, trip.id, { date: '2026-11-01' });
    const day2 = createDay(testDb, trip.id, { date: '2026-11-03' });
    const place = createPlace(testDb, trip.id, { name: 'Grand Hotel' });

    // Create a hotel reservation that creates an accommodation and a linked budget item
    const createRes = await request(app)
      .post(`/api/trips/${trip.id}/reservations`)
      .set('Cookie', authCookie(user.id))
      .send({
        title: 'Grand Hotel Stay',
        type: 'hotel',
        day_id: day1.id,
        create_accommodation: { place_id: place.id, start_day_id: day1.id, end_day_id: day2.id },
        create_budget_entry: { total_price: 450, category: 'Accommodation' },
      });
    expect(createRes.status).toBe(201);

    const accommodationId = testDb.prepare(
      'SELECT id FROM day_accommodations WHERE trip_id = ?'
    ).get(trip.id) as any;
    expect(accommodationId).toBeDefined();

    const budgetBefore = testDb.prepare(
      'SELECT id FROM budget_items WHERE trip_id = ?'
    ).get(trip.id);
    expect(budgetBefore).toBeDefined();

    // Delete via the accommodation endpoint (the primary bug path)
    const delRes = await request(app)
      .delete(`/api/trips/${trip.id}/accommodations/${accommodationId.id}`)
      .set('Cookie', authCookie(user.id));
    expect(delRes.status).toBe(200);

    const budgetAfter = testDb.prepare(
      'SELECT id FROM budget_items WHERE trip_id = ?'
    ).get(trip.id);
    expect(budgetAfter).toBeUndefined();
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Plan 3c Task 9 fix wave — A-H2 (live regression): `DaysService` was
// converted with a bare `Number(tripId)` at every entry point while
// `restampReservationDates`/`assertNoInvertedAccommodation` (Plan 3d
// survivors) kept binding the RAW route string — an affinity seam a
// hex-spelled trip id never matches. `TripAccessGuard` authorises a
// hex-spelled id whose `Number()` value is a real trip (`Number('0x12')`
// is `18`), so one `PUT .../days/reorder` request could renumber that real
// trip's days (the `Number()` half) while its own inverted-accommodation
// guard silently matched zero rows (the raw-string half) — writing a stay
// whose end precedes its start with no error. Every entry point now parses
// ONCE with `toRowId` and threads that value into every survivor; a
// `toRowId` miss answers a legacy-shaped not-found instead of letting the
// guard's wider `Number()` grant reach a downstream raw bind that disagrees
// with it.
// ─────────────────────────────────────────────────────────────────────────────

describe('A-H2 — DaysService trip id parsed once, threaded to every survivor (Task 9 fix wave)', () => {
  it('GET /days by the hex-spelled trip id answers the legacy-shaped miss ({ days: [] }), not the real trip\'s days', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-03' });
    const hexTripId = '0x' + trip.id.toString(16);

    const res = await request(app)
      .get(`/api/trips/${hexTripId}/days`)
      .set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toEqual({ days: [] });
  });

  it('PUT /days/:id by the hex-spelled trip id 404s "Day not found" (getDay\'s own toRowId gate), not the real trip\'s day', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const day = createDay(testDb, trip.id, { title: 'Original' });
    const hexTripId = '0x' + trip.id.toString(16);

    const res = await request(app)
      .put(`/api/trips/${hexTripId}/days/${day.id}`)
      .set('Cookie', authCookie(user.id))
      .send({ title: 'Renamed' });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Day not found' });
    const row = testDb.prepare('SELECT title FROM days WHERE id = ?').get(day.id) as { title: string };
    expect(row.title).toBe('Original');
  });

  it('POST /days by the hex-spelled trip id (append, no position) answers the guard\'s own 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2 — was a manufactured 500)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const hexTripId = '0x' + trip.id.toString(16);
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${hexTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({});
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days {position} (insert) by the hex-spelled trip id answers the guard\'s own 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2 — was a manufactured 500)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-02' });
    const hexTripId = '0x' + trip.id.toString(16);
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${hexTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ position: 1 });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days (append, no position) by trip id "N.0" answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const shapedTripId = `${trip.id}.0`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({});
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days {position} (insert) by trip id "N.0" answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-02' });
    const shapedTripId = `${trip.id}.0`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ position: 1 });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days (append, no position) by trip id "N%20" (trailing space) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const shapedTripId = `${trip.id}%20`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({});
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days {position} (insert) by trip id "N%20" (trailing space) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-02' });
    const shapedTripId = `${trip.id}%20`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ position: 1 });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days (append, no position) by trip id "%2BN" (leading plus) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const shapedTripId = `%2B${trip.id}`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({});
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days {position} (insert) by trip id "%2BN" (leading plus) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-02' });
    const shapedTripId = `%2B${trip.id}`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ position: 1 });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days (append, no position) by trip id "Ne0" (exponent form) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip' });
    const shapedTripId = `${trip.id}e0`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({});
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('POST /days {position} (insert) by trip id "Ne0" (exponent form) answers 404 "Trip not found" and writes no day (M-1 narrowing, Task 9 fix round 2)', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-09-01', end_date: '2026-09-02' });
    const shapedTripId = `${trip.id}e0`;
    const before = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;

    const res = await request(app)
      .post(`/api/trips/${shapedTripId}/days`)
      .set('Cookie', authCookie(user.id))
      .send({ position: 1 });
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
    const after = (testDb.prepare('SELECT COUNT(*) AS n FROM days WHERE trip_id = ?').get(trip.id) as { n: number }).n;
    expect(after).toBe(before);
  });

  it('PUT /days/reorder by the hex-spelled trip id 400s "orderedIds must be a permutation…" and writes NOTHING — the live H2 bug: it used to 200 and invert a real accommodation', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-06-01', end_date: '2026-06-03' });
    const days = testDb.prepare('SELECT id, day_number, date FROM days WHERE trip_id = ? ORDER BY day_number').all(trip.id) as { id: number; day_number: number; date: string }[];
    expect(days).toHaveLength(3);
    const [d1, d2, d3] = days;
    const place = createPlace(testDb, trip.id, { name: 'Hotel' });
    // A valid (non-inverted) stay d1 -> d2, and a reservation on d1 — exactly
    // the shape the compiled-boot evidence used to catch reorder inverting.
    const stay = createDayAccommodation(testDb, trip.id, place.id, d1.id, d2.id);
    const reservation = createReservation(testDb, trip.id, { day_id: d1.id, title: 'Dinner' });
    testDb.prepare('UPDATE reservations SET reservation_time = ? WHERE id = ?').run('2026-06-01T19:00:00', reservation.id);
    const hexTripId = '0x' + trip.id.toString(16);

    const res = await request(app)
      .put(`/api/trips/${hexTripId}/days/reorder`)
      .set('Cookie', authCookie(user.id))
      .send({ orderedIds: [d2.id, d1.id, d3.id] });
    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'orderedIds must be a permutation of the trip day ids.' });

    // Nothing renumbered.
    const after = testDb.prepare('SELECT id, day_number, date FROM days WHERE trip_id = ? ORDER BY day_number').all(trip.id) as { id: number; day_number: number; date: string }[];
    expect(after).toEqual(days);
    // The stay is still d1 -> d2, never inverted.
    const stayAfter = testDb.prepare('SELECT start_day_id, end_day_id FROM day_accommodations WHERE id = ?').get(stay.id) as { start_day_id: number; end_day_id: number };
    expect(stayAfter).toEqual({ start_day_id: d1.id, end_day_id: d2.id });
    // The reservation's stamped time is untouched.
    const resAfter = testDb.prepare('SELECT reservation_time FROM reservations WHERE id = ?').get(reservation.id) as { reservation_time: string };
    expect(resAfter.reservation_time).toBe('2026-06-01T19:00:00');
  });

  it('PUT /days/reorder with the REAL numeric trip id still works and can still be legitimately rejected for inverting a stay (unchanged, base 400) — L-5: zero days rows changed, not only the stay', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id, { title: 'Trip', start_date: '2026-06-01', end_date: '2026-06-03' });
    const days = testDb.prepare('SELECT id, day_number, date FROM days WHERE trip_id = ? ORDER BY day_number').all(trip.id) as { id: number; day_number: number; date: string }[];
    const [d1, d2, d3] = days;
    const place = createPlace(testDb, trip.id, { name: 'Hotel' });
    const stay = createDayAccommodation(testDb, trip.id, place.id, d1.id, d3.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/days/reorder`)
      .set('Cookie', authCookie(user.id))
      .send({ orderedIds: [d3.id, d2.id, d1.id] });
    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'This move would make an accommodation end before it starts.' });
    const stayAfter = testDb.prepare('SELECT start_day_id, end_day_id FROM day_accommodations WHERE id = ?').get(stay.id) as { start_day_id: number; end_day_id: number };
    expect(stayAfter).toEqual({ start_day_id: d1.id, end_day_id: d3.id });
    // L-5: the rollback holds on every day row, not only the stay — zero rows changed.
    const daysAfter = testDb.prepare('SELECT id, day_number, date FROM days WHERE trip_id = ? ORDER BY day_number').all(trip.id) as { id: number; day_number: number; date: string }[];
    expect(daysAfter).toEqual(days);
  });
});