import { INestApplication } from '@nestjs/common';
import { getRepositoryToken } from '@nestjs/typeorm';
import request from 'supertest';
import { buildTestApp } from './app.harness';
import { SessionEntity } from '../src/session/session.entity';
import { Repository } from 'typeorm';

/**
 * Browser controller integration tests.
 *
 * POST /open and POST /exec need a running Playwright browser.  We test
 * validation rejections (no browser launched) and session-not-found paths,
 * which are safe to run in a headless CI environment.
 */
describe('BrowserController', () => {
  let app: INestApplication;
  let sessionRepo: Repository<SessionEntity>;

  const FAKE_SESSION = 'test-browser-session';

  beforeAll(async () => {
    app = await buildTestApp();
    sessionRepo = app.get<Repository<SessionEntity>>(getRepositoryToken(SessionEntity));

    // Seed a session with minimal but valid JSON so the browser code can
    // deserialise it (it will still fail to open a real page, tested separately)
    await sessionRepo.save(
      sessionRepo.create({
        sessionName: FAKE_SESSION,
        token: 'fake-token',
        cookies: '[]',
        localStorage: '{}',
      }),
    );
  });

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

  // ── POST /open ─────────────────────────────────────────────────────────────

  describe('POST /open', () => {
    it('returns 400 when body is empty', async () => {
      await request(app.getHttpServer()).post('/open').send({}).expect(400);
    });

    it('returns 400 when url is missing', async () => {
      await request(app.getHttpServer())
        .post('/open')
        .send({ sessionName: FAKE_SESSION })
        .expect(400);
    });

    it('returns 404 when session does not exist', async () => {
      await request(app.getHttpServer())
        .post('/open')
        .send({ sessionName: 'no-such-session', url: 'https://example.com' })
        .expect(404);
    });

    it('succeeds without a session (sessionless open)', async () => {
      const res = await request(app.getHttpServer())
        .post('/open')
        .send({ url: 'https://example.com' })
        .expect(201);
      expect(res.body).toMatchObject({
        url: expect.any(String),
        title: expect.any(String),
        content: expect.any(String),
      });
    });

    it('returns only selector content when selector is provided', async () => {
      const res = await request(app.getHttpServer())
        .post('/open')
        .send({ url: 'https://example.com', selector: '#mock' })
        .expect(201);
      expect(res.body.content).toBe('<div id="mock">mock content</div>');
    });

    it('returns selector text content in reader mode', async () => {
      const res = await request(app.getHttpServer())
        .post('/open')
        .send({ url: 'https://example.com', selector: '#mock', readerMode: true })
        .expect(201);
      expect(res.body.content).toBe('mock content');
    });
  });

  // ── POST /exec ─────────────────────────────────────────────────────────────

  describe('POST /exec', () => {
    it('returns 400 when body is empty', async () => {
      await request(app.getHttpServer()).post('/exec').send({}).expect(400);
    });

    it('returns 400 when code is missing', async () => {
      await request(app.getHttpServer())
        .post('/exec')
        .send({ sessionName: FAKE_SESSION })
        .expect(400);
    });

    it('returns 400 when code has a syntax error', async () => {
      await request(app.getHttpServer())
        .post('/exec')
        .send({ sessionName: FAKE_SESSION, code: 'this is not valid {{{' })
        .expect(400);
    });

    it('returns 404 when session does not exist', async () => {
      await request(app.getHttpServer())
        .post('/exec')
        .send({ sessionName: 'no-such-session', code: 'return 1;' })
        .expect(404);
    });

    it('succeeds without a session (sessionless exec)', async () => {
      const res = await request(app.getHttpServer())
        .post('/exec')
        .send({ code: 'return 42;' })
        .expect(201);
      expect(res.body).toEqual({ result: 42 });
    });
  });
});