/**
 * Load test: GET tracks, search, track detail
 * Usage: k6 run loadtests/backend/tracks.js
 * Option: AUTH_TOKEN for authenticated requests
 */
import http from 'k6/http';
import { check, sleep } from 'k6';
import { Rate } from 'k6/metrics';

const errorRate = new Rate('errors');
const BASE_URL = __ENV.BASE_URL || __ENV.API_ORIGIN || 'http://localhost:8080';
const AUTH_TOKEN = __ENV.AUTH_TOKEN || '';

export const options = {
  stages: [
    { duration: '30s', target: 10 },
    { duration: '1m', target: 15 },
    { duration: '30s', target: 0 },
  ],
  thresholds: {
    http_req_duration: ['p(95)<500', 'p(99)<1000'],
    errors: ['rate<0.05'],
  },
};

export default function () {
  const headers = AUTH_TOKEN ? { Authorization: `Bearer ${AUTH_TOKEN}` } : {};

  const tracksRes = http.get(`${BASE_URL}/api/v1/tracks`, { headers });
  const tracksOk = check(tracksRes, {
    'tracks returns 200 or 401': (r) => r.status === 200 || r.status === 401,
  });
  errorRate.add(!tracksOk && tracksRes.status >= 500);
  sleep(0.5);

  const searchRes = http.get(
    `${BASE_URL}/api/v1/tracks/search?q=test&limit=10`,
    { headers }
  );
  check(searchRes, {
    'search returns 200 or 401': (r) => r.status === 200 || r.status === 401,
  });
  errorRate.add(searchRes.status >= 500);
  sleep(0.5);

  if (tracksRes.status === 200) {
    try {
      const body = JSON.parse(tracksRes.body);
      const tracks = body.data?.tracks || body.data || body.tracks || [];
      if (Array.isArray(tracks) && tracks.length > 0) {
        const trackId = tracks[0].id || tracks[0].ID;
        if (trackId) {
          const detailRes = http.get(
            `${BASE_URL}/api/v1/tracks/${trackId}`,
            { headers }
          );
          check(detailRes, {
            'track detail returns 200 or 404': (r) =>
              r.status === 200 || r.status === 404,
          });
        }
      }
    } catch (e) {}
  }
  sleep(1);
}