/**
 * Load test: GET marketplace/products, GET marketplace/orders
 * Usage: k6 run loadtests/backend/marketplace.js
 */
import http from 'k6/http';
import { check, sleep } from 'k6';
import { Rate } from 'k6/metrics';
import { randomString } from 'https://jslib.k6.io/k6-utils/1.2.0/index.js';

const errorRate = new Rate('errors');
const API_ORIGIN = __ENV.API_ORIGIN || __ENV.BASE_URL || 'http://localhost:8080';
const TEST_EMAIL_PREFIX = __ENV.TEST_EMAIL_PREFIX || 'user+market';
const TEST_EMAIL_DOMAIN = __ENV.TEST_EMAIL_DOMAIN || 'example.com';
const TEST_PASSWORD_PREFIX = __ENV.TEST_PASSWORD_PREFIX || 'V3za!market-';

function generateTestUser() {
  const rand = randomString(8);
  const pwd = `${TEST_PASSWORD_PREFIX}${rand}`;
  return {
    email: `${TEST_EMAIL_PREFIX}${rand}@${TEST_EMAIL_DOMAIN}`,
    password: pwd,
    password_confirmation: pwd,
    username: `mk${rand}`,
  };
}

export const options = {
  scenarios: {
    marketplace: {
      executor: 'ramping-vus',
      stages: [
        { duration: '30s', target: 5 },
        { duration: '1m', target: 5 },
        { duration: '30s', target: 0 },
      ],
    },
  },
  thresholds: {
    http_req_duration: ['p(95)<500', 'p(99)<1000'],
    errors: ['rate<0.1'],
  },
};

export function setup() {
  const users = [];
  const baseURL = `${API_ORIGIN}/api/v1/auth`;
  for (let i = 0; i < 10; i++) {
    const user = generateTestUser();
    const registerRes = http.post(`${baseURL}/register`, JSON.stringify(user), {
      headers: { 'Content-Type': 'application/json' },
    });
    if (registerRes.status === 201) {
      const loginRes = http.post(`${baseURL}/login`, JSON.stringify({ email: user.email, password: user.password }), {
        headers: { 'Content-Type': 'application/json' },
      });
      if (loginRes.status === 200) {
        try {
          const body = JSON.parse(loginRes.body);
          const token = body.data?.token?.access_token;
          if (token) users.push({ ...user, token });
        } catch (e) {}
      }
    }
  }
  return { users };
}

export default function (data) {
  const { users } = data;
  const baseURL = `${API_ORIGIN}/api/v1/marketplace`;

  const productsRes = http.get(`${baseURL}/products`);
  const productsOk = check(productsRes, {
    'products returns 200': (r) => r.status === 200,
  });
  errorRate.add(!productsOk);
  sleep(0.5);

  if (users.length > 0 && Math.random() < 0.5) {
    const user = users[Math.floor(Math.random() * users.length)];
    const ordersRes = http.get(`${baseURL}/orders`, {
      headers: { Authorization: `Bearer ${user.token}` },
    });
    check(ordersRes, {
      'orders returns 200 or 401': (r) => r.status === 200 || r.status === 401,
    });
  }
  sleep(1);
}