import request from 'supertest';
import app from '../../src/app';
import { pool } from '../../src/db';
import { resetDb, closeDb } from './setup/testDb';

beforeEach(async () => {
  await resetDb();
});

afterAll(async () => {
  await pool.end();
  await closeDb();
});

describe('issuing an upload link', () => {
  it('returns the token exactly once, at creation', async () => {
    const created = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

    expect(created.status).toBe(201);
    expect(created.body.label).toBe('Sarah');
    expect(created.body.token).toMatch(/^[A-Za-z0-9_-]{43}$/);
    expect(created.body.url).toContain(`/submit/${created.body.token}`);

    const listed = await request(app).get('/api/admin/upload-links');
    expect(listed.status).toBe(200);
    expect(listed.body).toHaveLength(1);
    // The whole point of storing a digest: the listing cannot hand it back.
    expect(listed.body[0].token).toBeUndefined();
    expect(listed.body[0].token_hash).toBeUndefined();
  });

  it('stores the digest rather than the token', async () => {
    const created = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Estate sale box 3', email: 'sarah@example.com' });

    const { rows } = await pool.query<{ token_hash: string }>(
      `SELECT token_hash FROM upload_links`
    );
    expect(rows[0]?.token_hash).not.toBe(created.body.token);
    expect(rows[0]?.token_hash).toMatch(/^[a-f0-9]{64}$/);
  });

  it('refuses a link with no label', async () => {
    const res = await request(app).post('/api/admin/upload-links').send({ label: '  ' });
    expect(res.status).toBe(400);
  });

  it('refuses a non-positive submission cap', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Bad cap', email: 'sarah@example.com', maxSubmissions: 0 });
    expect(res.status).toBe(400);
  });

  // Omitting the field is the common case, so it is the case that has to be
  // safe. An unbounded link should be something asked for, not something that
  // happens when nobody thought about it.
  it('bounds a link that was created without a cap', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

    expect(res.status).toBe(201);
    expect(res.body.max_submissions).toBe(25);
  });

  it('allows unlimited when it is asked for explicitly', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Always on', email: 'sarah@example.com', maxSubmissions: null });

    expect(res.status).toBe(201);
    expect(res.body.max_submissions).toBeNull();
  });
});

describe('revoking an upload link', () => {
  it('stamps revoked_at and reports it in the listing', async () => {
    const created = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Temporary', email: 'sarah@example.com' });

    const revoked = await request(app)
      .post(`/api/admin/upload-links/${created.body.id}/revoke`);

    expect(revoked.status).toBe(200);
    expect(revoked.body.revoked_at).not.toBeNull();
  });

  // The useful fact is when access ended, so a second click must not rewrite
  // it — and it must not be an error either, because a button that fails on a
  // double-click teaches people to distrust it.
  it('is idempotent, keeping the original timestamp', async () => {
    const created = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Temporary', email: 'sarah@example.com' });

    const first = await request(app).post(`/api/admin/upload-links/${created.body.id}/revoke`);
    const second = await request(app).post(`/api/admin/upload-links/${created.body.id}/revoke`);

    expect(second.status).toBe(200);
    expect(second.body.revoked_at).toBe(first.body.revoked_at);
  });

  it('404s for a link that does not exist', async () => {
    const res = await request(app).post('/api/admin/upload-links/9999/revoke');
    expect(res.status).toBe(404);
  });
});

describe('emailing the link to its recipient', () => {
  const original = { ...process.env };

  afterEach(() => {
    process.env = { ...original };
  });

  it('refuses to create a link with no address', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah' });

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

  it('refuses an address that is not one', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'not-an-address' });

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

  it('stores the address on the link', async () => {
    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

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

    const { rows } = await pool.query<{ contact_email: string }>(
      `SELECT contact_email FROM upload_links WHERE id = $1`,
      [res.body.id]
    );
    expect(rows[0]?.contact_email).toBe('sarah@example.com');
  });

  // The point of the whole change: QA blocks delivery by design, so a link that
  // was not actually emailed must not be reported as though it was.
  it('says the mail was not sent when SMTP is not configured', async () => {
    delete process.env.SMTP_USER;
    delete process.env.SMTP_PASSWORD;

    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

    expect(res.status).toBe(201);
    expect(res.body.mail).toEqual({ sent: false, outcome: 'skipped-unconfigured' });
  });

  it('says the mail was not sent when the address is not allowlisted', async () => {
    process.env.SMTP_USER = 'user';
    process.env.SMTP_PASSWORD = 'password';
    process.env.MAIL_ALLOWLIST = 'someone@example.com';

    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

    expect(res.status).toBe(201);
    expect(res.body.mail).toEqual({ sent: false, outcome: 'skipped-blocked' });
  });

  // A send that could not happen must never cost the admin the link, because
  // the token is shown exactly once and a rollback would hand them a different
  // one on the retry.
  it('still returns a usable link when the mail did not go', async () => {
    delete process.env.SMTP_USER;

    const res = await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Sarah', email: 'sarah@example.com' });

    expect(res.body.token).toBeTruthy();
    expect(res.body.url).toContain(res.body.token);
    expect(res.body.mail.sent).toBe(false);
  });

  it('lists the address, and tolerates a link that has none', async () => {
    await pool.query(`INSERT INTO upload_links (label, token_hash) VALUES ('Older link', 'digest')`);
    await request(app)
      .post('/api/admin/upload-links')
      .send({ label: 'Newer link', email: 'sarah@example.com' });

    const res = await request(app).get('/api/admin/upload-links');

    const older = res.body.find((row: { label: string }) => row.label === 'Older link');
    const newer = res.body.find((row: { label: string }) => row.label === 'Newer link');
    expect(older.contact_email).toBeNull();
    expect(newer.contact_email).toBe('sarah@example.com');
  });
});