import { INestApplication } from '@nestjs/common';
import * as bcrypt from 'bcryptjs';
import { NobleCryptoPlugin, ScureBase32Plugin, TOTP } from 'otplib';
import request from 'supertest';
import { App } from 'supertest/types';
import { PrismaService } from '../src/prisma/prisma.service';
import { encryptMfaSecret } from '../src/auth/mfa/mfa-crypto.util';
import { generateTotpSecret } from '../src/auth/mfa/totp.util';
import { createTestApp } from './utils/create-test-app';

/**
 * Account-level brute-force protection and one-time TOTP codes, against a
 * real database. Each test uses its own account, because the per-IP
 * throttle (10/min on login) is shared by the whole suite.
 */
describe('Account guard (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
  const password = 'SuperSecret123!';

  const login = (email: string, pw: string) =>
    request(app.getHttpServer())
      .post('/api/v1/auth/login')
      .send({ email, password: pw });

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);
  });

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

  it('locks an account after five wrong passwords, even for the right one', async () => {
    const email = `lockout-${suffix}@example.com`;
    await prisma.user.create({
      data: {
        email,
        passwordHash: await bcrypt.hash(password, 4),
        name: 'Lockout',
        role: { connect: { key: 'READONLY' } },
      },
    });

    for (let i = 0; i < 5; i++) {
      await login(email, 'wrong-password-123').expect(401);
    }
    const locked = await login(email, password).expect(401);
    const wrong = await login(`nobody-${suffix}@example.com`, password).expect(
      401,
    );
    // Same message for "locked" and "no such account".
    expect((locked.body as { message: string }).message).toBe(
      (wrong.body as { message: string }).message,
    );

    const stored = await prisma.user.findUniqueOrThrow({ where: { email } });
    expect(stored.authLockedUntil?.getTime()).toBeGreaterThan(Date.now());
  });

  it('accepts a TOTP code only once', async () => {
    const email = `totp-${suffix}@example.com`;
    const secret = generateTotpSecret();
    await prisma.user.create({
      data: {
        email,
        passwordHash: await bcrypt.hash(password, 4),
        name: 'TOTP',
        mfaEnabled: true,
        mfaSecret: encryptMfaSecret(secret),
        role: { connect: { key: 'READONLY' } },
      },
    });
    const code = await new TOTP({
      secret,
      crypto: new NobleCryptoPlugin(),
      base32: new ScureBase32Plugin(),
    }).generate();

    const first = await login(email, password).expect(200);
    await request(app.getHttpServer())
      .post('/api/v1/auth/mfa/verify')
      .send({ mfaToken: (first.body as { mfaToken: string }).mfaToken, code })
      .expect(200);

    const second = await login(email, password).expect(200);
    await request(app.getHttpServer())
      .post('/api/v1/auth/mfa/verify')
      .send({ mfaToken: (second.body as { mfaToken: string }).mfaToken, code })
      .expect(401);
  });
});