import http from 'k6/http';
import { check, sleep } from 'k6';

const BASE_URL = __ENV.BASE_URL || 'http://app:3000';
const seed = JSON.parse(open('./seed-data.json'));

export const options = {
  stages: [
    { duration: '15s', target: 1 },
    { duration: '20s', target: 3 },
    { duration: '20s', target: 5 },
    { duration: '10s', target: 0 },
  ],
  thresholds: {
    http_req_failed: ['rate<0.01'],
    http_req_duration: ['p(95)<500'],
    checks: ['rate>0.99'],
  },
};

export default function () {
  const user = seed.users[(__VU + __ITER) % seed.users.length];
  const session =
    seed.sessions[(__VU + __ITER) % seed.sessions.length];

  const requests = [
    ['users', `${BASE_URL}/users/`],
    ['teachers', `${BASE_URL}/teachers/`],
    [
      'available sessions',
      `${BASE_URL}/sessions/available?dateTimestamp=${encodeURIComponent(session.dateTimestamp)}`,
    ],
    [
      'user session history',
      `${BASE_URL}/sessions/${user.id}/sessions`,
    ],
  ];

  for (const [name, url] of requests) {
    const response = http.get(url);

    check(response, {
      [`${name}: HTTP 200`]: (r) => r.status === 200,
      [`${name}: JSON response`]: (r) =>
        r.headers['Content-Type']?.includes('application/json'),
    });
  }

  sleep(1);
}