/**
 * Notifications integration tests.
 * Covers NOTIF-001 to NOTIF-014.
 *
 * External SMTP / webhook calls are not made — tests focus on preferences,
 * in-app notification CRUD, and authentication.
 */
import { buildApp } from '../../src/bootstrap';
import { db as testDb } from '../../src/db/database';
import { NotificationChannelPreferences } from '../../src/db/entities/NotificationChannelPreferences.entity';
import { Notifications } from '../../src/db/entities/Notifications.entity';
import { authCookie } from '../helpers/auth';
import { createUser, createAdmin, disableNotificationPref } from '../helpers/factories';
import type { FactoryOrm } from '../helpers/factories/context';
import { makeNotification } from '../helpers/factories/notifications';
import { findRow, updateRows } from '../helpers/factories/rows';
import { setUserSetting } from '../helpers/factories/settings';
import { resetTestDb, resetRateLimits } from '../helpers/test-db';
import { MikroORM } from '@mikro-orm/core';
import type { INestApplication } from '@nestjs/common';

import type { Application } from 'express';
import request from 'supertest';
import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';

vi.mock('../../src/db/database', async () => {
  const { createSnapshotTestDb, buildDbMock } = await import('../helpers/db-mock');
  return buildDbMock(createSnapshotTestDb());
});
// The two test-send endpoints must not reach a real SMTP server or URL. Since
// the fold they are provider methods, so they are stubbed on the prototype
// rather than by module path — everything else in the domain stays real.
vi.mock('../../src/nest/notifications/mailer/mailer.service', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../../src/nest/notifications/mailer/mailer.service')>();
  actual.MailerService.prototype.testSmtp = vi.fn().mockResolvedValue({ success: true });
  return actual;
});
vi.mock('../../src/nest/notifications/transports/webhook.service', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../../src/nest/notifications/transports/webhook.service')>();
  actual.WebhookService.prototype.testWebhook = vi.fn().mockResolvedValue({ success: true });
  return actual;
});

let nestApp: INestApplication;
let app: Application;
/** The app's own ORM, which the factories seed and read through. */
const orm = (): FactoryOrm => nestApp.get(MikroORM);

beforeAll(async () => {
  nestApp = await buildApp();
  app = nestApp.getHttpAdapter().getInstance();
});

beforeEach(async () => {
  resetTestDb(testDb);
  await resetRateLimits(nestApp);
});

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

describe('Notification preferences', () => {
  it('NOTIF-001 — GET /api/notifications/preferences returns defaults', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('preferences');
  });

  it('NOTIF-001 — PUT /api/notifications/preferences updates settings', async () => {
    const { user } = createUser(testDb);

    // The DTO ratchet enforces the matrix shape the client actually sends
    // ({ event: { channel: enabled } }); the pre-matrix flat notify_* body
    // this case used to send is rejected by the pipe now.
    const res = await request(app)
      .put('/api/notifications/preferences')
      .set('Cookie', authCookie(user.id))
      .send({ trip_invite: { email: true }, booking_change: { email: false } });
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('preferences');
  });

  it('NOTIF — GET preferences without auth returns 401', async () => {
    const res = await request(app).get('/api/notifications/preferences');
    expect(res.status).toBe(401);
  });
});

describe('In-app notifications', () => {
  it('NOTIF-008 — GET /api/notifications/in-app returns notifications array', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).get('/api/notifications/in-app').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(Array.isArray(res.body.notifications)).toBe(true);
  });

  it('NOTIF-008 — GET /api/notifications/in-app/unread-count returns count', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).get('/api/notifications/in-app/unread-count').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('count');
    expect(typeof res.body.count).toBe('number');
  });

  it('NOTIF-009 — PUT /api/notifications/in-app/read-all marks all read', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).put('/api/notifications/in-app/read-all').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);
  });

  it('NOTIF-010 — DELETE /api/notifications/in-app/all deletes all notifications', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).delete('/api/notifications/in-app/all').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);
  });

  it('NOTIF-011 — PUT /api/notifications/in-app/:id/read on non-existent returns 404', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).put('/api/notifications/in-app/99999/read').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(404);
  });

  it('NOTIF-012 — DELETE /api/notifications/in-app/:id on non-existent returns 404', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).delete('/api/notifications/in-app/99999').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(404);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// New preferences matrix API (NROUTE series)
// ─────────────────────────────────────────────────────────────────────────────

describe('GET /api/notifications/preferences — matrix format', () => {
  it('NROUTE-002 — returns preferences, channels, event_types, implemented_combos', async () => {
    const { user } = createUser(testDb);
    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('preferences');
    expect(res.body).toHaveProperty('channels');
    expect(res.body).toHaveProperty('event_types');
    expect(res.body).toHaveProperty('implemented_combos');
    const inapp = res.body.channels.find((c: { id: string }) => c.id === 'inapp');
    expect(inapp.active).toBe(true);
    // The built-in external channels are always described, active or not.
    expect(res.body.channels.map((c: { id: string }) => c.id)).toEqual(
      expect.arrayContaining(['inapp', 'email', 'webhook', 'ntfy']),
    );
  });

  it('NROUTE-003 — regular user does not see version_available in event_types', async () => {
    const { user } = createUser(testDb);
    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body.event_types).not.toContain('version_available');
  });

  it('NROUTE-004 — user preferences endpoint excludes version_available even for admins', async () => {
    const { user } = createAdmin(testDb);
    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body.event_types).not.toContain('version_available');
  });

  it('NROUTE-004b — admin notification preferences endpoint returns version_available', async () => {
    const { user } = createAdmin(testDb);
    const res = await request(app).get('/api/admin/notification-preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    expect(res.body.event_types).toContain('version_available');
  });

  it('NROUTE-005 — all preferences default to true for new user with no stored prefs', async () => {
    const { user } = createUser(testDb);
    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    const { preferences } = res.body;
    for (const [, channels] of Object.entries(preferences)) {
      for (const [, enabled] of Object.entries(channels as Record<string, boolean>)) {
        expect(enabled).toBe(true);
      }
    }
  });
});

describe('PUT /api/notifications/preferences — matrix format', () => {
  it('NROUTE-007 — disabling a preference persists and is reflected in subsequent GET', async () => {
    const { user } = createUser(testDb);

    const putRes = await request(app)
      .put('/api/notifications/preferences')
      .set('Cookie', authCookie(user.id))
      .send({ trip_invite: { email: false } });

    expect(putRes.status).toBe(200);
    expect(putRes.body.preferences['trip_invite']['email']).toBe(false);

    const getRes = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(getRes.body.preferences['trip_invite']['email']).toBe(false);
  });

  it('NROUTE-008 — re-enabling a preference restores default state', async () => {
    const { user } = createUser(testDb);
    disableNotificationPref(testDb, user.id, 'trip_invite', 'email');

    const res = await request(app)
      .put('/api/notifications/preferences')
      .set('Cookie', authCookie(user.id))
      .send({ trip_invite: { email: true } });

    expect(res.status).toBe(200);
    expect(res.body.preferences['trip_invite']['email']).toBe(true);

    const row = await findRow(orm(), NotificationChannelPreferences, {
      user: user.id,
      event_type: 'trip_invite',
      channel: 'email',
    });
    expect(row).toBeNull();
  });

  it('NROUTE-009 — partial update does not affect other preferences', async () => {
    const { user } = createUser(testDb);
    disableNotificationPref(testDb, user.id, 'booking_change', 'email');

    await request(app)
      .put('/api/notifications/preferences')
      .set('Cookie', authCookie(user.id))
      .send({ trip_invite: { email: false } });

    const getRes = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(getRes.body.preferences['booking_change']['email']).toBe(false);
    expect(getRes.body.preferences['trip_invite']['email']).toBe(false);
    expect(getRes.body.preferences['trip_reminder']['email']).toBe(true);
  });
});

describe('implemented_combos — in-app channel coverage', () => {
  it('NROUTE-010 — implemented_combos includes inapp for all event types', async () => {
    const { user } = createUser(testDb);
    const res = await request(app).get('/api/notifications/preferences').set('Cookie', authCookie(user.id));
    expect(res.status).toBe(200);
    const { implemented_combos } = res.body as { implemented_combos: Record<string, string[]> };
    const eventTypes = [
      'trip_invite',
      'booking_change',
      'trip_reminder',
      'vacay_invite',
      'photos_shared',
      'collab_message',
      'packing_tagged',
    ];
    for (const event of eventTypes) {
      expect(implemented_combos[event], `${event} should support inapp`).toContain('inapp');
      expect(implemented_combos[event], `${event} should support email`).toContain('email');
      expect(implemented_combos[event], `${event} should support webhook`).toContain('webhook');
    }
  });
});

describe('Notification test endpoints', () => {
  it('NOTIF-005 — POST /api/notifications/test-smtp requires admin', async () => {
    const { user } = createUser(testDb);

    // Send the empty JSON body the client sends ({ email: undefined } →
    // {}): a completely body-less POST has no content-type, so the DTO pipe
    // rejects it before the admin gate since the ratchet.
    const res = await request(app).post('/api/notifications/test-smtp').set('Cookie', authCookie(user.id)).send({});
    // Non-admin gets 403
    expect(res.status).toBe(403);
  });

  it('NOTIF-006 — POST /api/notifications/test-webhook returns 400 when url is missing', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).post('/api/notifications/test-webhook').set('Cookie', authCookie(user.id)).send({});
    expect(res.status).toBe(400);
  });

  it('NOTIF-006b — POST /api/notifications/test-webhook returns 400 for invalid URL', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .post('/api/notifications/test-webhook')
      .set('Cookie', authCookie(user.id))
      .send({ url: 'not-a-url' });
    expect(res.status).toBe(400);
  });

  it('NOTIF-005b — admin can call test-smtp and gets a result', async () => {
    const { user } = createAdmin(testDb);

    const res = await request(app)
      .post('/api/notifications/test-smtp')
      .set('Cookie', authCookie(user.id))
      .send({ email: 'test@example.com' });

    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('success');
  });

  it('NOTIF-006c — POST /api/notifications/test-webhook with valid URL calls testWebhook', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .post('/api/notifications/test-webhook')
      .set('Cookie', authCookie(user.id))
      .send({ url: 'https://webhook.site/test-endpoint' });

    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('success');
  });

  it('NOTIF-007 — POST /api/notifications/test-ntfy returns 400 when no topic configured', async () => {
    const { user } = createUser(testDb);

    const res = await request(app).post('/api/notifications/test-ntfy').set('Cookie', authCookie(user.id)).send({});

    expect(res.status).toBe(400);
    expect(res.body).toHaveProperty('error');
  });

  it('NOTIF-008 — POST /api/notifications/test-ntfy with explicit topic returns 200', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .post('/api/notifications/test-ntfy')
      .set('Cookie', authCookie(user.id))
      .send({ topic: 'trek-integration-test-topic' });

    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('success');
  });

  it('NOTIF-009 — POST /api/notifications/test-ntfy falls back to user saved topic', async () => {
    const { user } = createUser(testDb);
    await setUserSetting(orm(), user.id, 'ntfy_topic', 'saved-user-topic');

    const res = await request(app).post('/api/notifications/test-ntfy').set('Cookie', authCookie(user.id)).send({});

    expect(res.status).toBe(200);
    expect(res.body).toHaveProperty('success');
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// Helper: insert a boolean notification directly into the DB
// ─────────────────────────────────────────────────────────────────────────────

async function insertBooleanNotification(recipientId: number): Promise<number> {
  const row = await makeNotification(orm(), recipientId, {
    type: 'boolean',
    target: recipientId,
    sender: null,
    title_key: 'notif.test.title',
    title_params: '{}',
    text_key: 'notif.test.text',
    text_params: '{}',
    positive_text_key: 'notif.action.accept',
    negative_text_key: 'notif.action.decline',
    positive_callback: '{"action":"test_approve","payload":{}}',
    negative_callback: '{"action":"test_deny","payload":{}}',
  });
  return row.id;
}

async function insertSimpleNotification(recipientId: number): Promise<number> {
  const row = await makeNotification(orm(), recipientId, {
    type: 'simple',
    target: recipientId,
    sender: null,
    title_key: 'notif.test.title',
    title_params: '{}',
    text_key: 'notif.test.text',
    text_params: '{}',
  });
  return row.id;
}

// ─────────────────────────────────────────────────────────────────────────────
// POST /in-app/:id/respond
// ─────────────────────────────────────────────────────────────────────────────

describe('POST /api/notifications/in-app/:id/respond', () => {
  it('NROUTE-011 — valid positive response returns success and updated notification', async () => {
    const { user } = createUser(testDb);
    const id = await insertBooleanNotification(user.id);

    const res = await request(app)
      .post(`/api/notifications/in-app/${id}/respond`)
      .set('Cookie', authCookie(user.id))
      .send({ response: 'positive' });

    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);
    expect(res.body.notification).toBeDefined();
    expect(res.body.notification.response).toBe('positive');
  });

  it('NROUTE-012 — invalid response value returns 400', async () => {
    const { user } = createUser(testDb);
    const id = await insertBooleanNotification(user.id);

    const res = await request(app)
      .post(`/api/notifications/in-app/${id}/respond`)
      .set('Cookie', authCookie(user.id))
      .send({ response: 'maybe' });

    expect(res.status).toBe(400);
  });

  it('NROUTE-013 — response on non-existent notification returns 400', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .post('/api/notifications/in-app/99999/respond')
      .set('Cookie', authCookie(user.id))
      .send({ response: 'positive' });

    expect(res.status).toBe(400);
  });

  it('NROUTE-014 — double response returns 400', async () => {
    const { user } = createUser(testDb);
    const id = await insertBooleanNotification(user.id);

    await request(app)
      .post(`/api/notifications/in-app/${id}/respond`)
      .set('Cookie', authCookie(user.id))
      .send({ response: 'positive' });

    const res = await request(app)
      .post(`/api/notifications/in-app/${id}/respond`)
      .set('Cookie', authCookie(user.id))
      .send({ response: 'negative' });

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

// ─────────────────────────────────────────────────────────────────────────────
// PUT /api/admin/notification-preferences
// ─────────────────────────────────────────────────────────────────────────────

describe('PUT /api/admin/notification-preferences', () => {
  it('NROUTE-015 — admin can disable email for version_available, persists in GET', async () => {
    const { user } = createAdmin(testDb);

    const putRes = await request(app)
      .put('/api/admin/notification-preferences')
      .set('Cookie', authCookie(user.id))
      .send({ version_available: { email: false } });

    expect(putRes.status).toBe(200);
    expect(putRes.body.preferences['version_available']['email']).toBe(false);

    const getRes = await request(app).get('/api/admin/notification-preferences').set('Cookie', authCookie(user.id));
    expect(getRes.status).toBe(200);
    expect(getRes.body.preferences['version_available']['email']).toBe(false);
  });

  it('NROUTE-016 — non-admin is rejected with 403', async () => {
    const { user } = createUser(testDb);

    const res = await request(app)
      .put('/api/admin/notification-preferences')
      .set('Cookie', authCookie(user.id))
      .send({ version_available: { email: false } });

    expect(res.status).toBe(403);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// In-app CRUD with actual notification data
// ─────────────────────────────────────────────────────────────────────────────

describe('In-app notifications — CRUD with data', () => {
  it('NROUTE-017 — GET /in-app returns created notifications', async () => {
    const { user } = createUser(testDb);
    await insertSimpleNotification(user.id);
    await insertSimpleNotification(user.id);

    const res = await request(app).get('/api/notifications/in-app').set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.notifications.length).toBe(2);
    expect(res.body.total).toBe(2);
    expect(res.body.unread_count).toBe(2);
  });

  it('NROUTE-018 — unread count reflects actual unread notifications', async () => {
    const { user } = createUser(testDb);
    await insertSimpleNotification(user.id);
    await insertSimpleNotification(user.id);

    const res = await request(app).get('/api/notifications/in-app/unread-count').set('Cookie', authCookie(user.id));

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

  it('NROUTE-019 — mark-read on existing notification succeeds and decrements unread count', async () => {
    const { user } = createUser(testDb);
    const id = await insertSimpleNotification(user.id);

    const markRes = await request(app).put(`/api/notifications/in-app/${id}/read`).set('Cookie', authCookie(user.id));
    expect(markRes.status).toBe(200);
    expect(markRes.body.success).toBe(true);

    const countRes = await request(app)
      .get('/api/notifications/in-app/unread-count')
      .set('Cookie', authCookie(user.id));
    expect(countRes.body.count).toBe(0);
  });

  it('NROUTE-020 — mark-unread on a read notification succeeds', async () => {
    const { user } = createUser(testDb);
    const id = await insertSimpleNotification(user.id);
    // Mark read first
    await updateRows(orm(), Notifications, { id }, { is_read: 1 });

    const res = await request(app).put(`/api/notifications/in-app/${id}/unread`).set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);
    const row = await findRow(orm(), Notifications, { id });
    expect(row?.is_read).toBe(0);
  });

  it('NROUTE-021 — DELETE on existing notification removes it', async () => {
    const { user } = createUser(testDb);
    const id = await insertSimpleNotification(user.id);

    const res = await request(app).delete(`/api/notifications/in-app/${id}`).set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.success).toBe(true);
    expect(await findRow(orm(), Notifications, { id })).toBeNull();
  });

  it('NROUTE-022 — unread_only=true filter returns only unread notifications', async () => {
    const { user } = createUser(testDb);
    const id1 = await insertSimpleNotification(user.id);
    await insertSimpleNotification(user.id);
    // Mark first one read
    await updateRows(orm(), Notifications, { id: id1 }, { is_read: 1 });

    const res = await request(app).get('/api/notifications/in-app?unread_only=true').set('Cookie', authCookie(user.id));

    expect(res.status).toBe(200);
    expect(res.body.notifications.length).toBe(1);
    expect(res.body.notifications[0].is_read).toBe(0);
  });
});