/**
 * Load test: Stream server health, healthz, readyz
 * Usage: k6 run loadtests/stream/http.js
 * Requires: Stream server running (default localhost:8082)
 */
import http from 'k6/http';
import { check, sleep } from 'k6';
import { Rate, Trend } from 'k6/metrics';

const errorRate = new Rate('stream_errors');
const healthDuration = new Trend('stream_health_duration');

const STREAM_ORIGIN = __ENV.STREAM_ORIGIN || 'http://localhost:8082';

export const options = {
  scenarios: {
    stream_health: {
      executor: 'constant-arrival-rate',
      rate: 10,
      timeUnit: '1s',
      duration: '2m',
      preAllocatedVUs: 20,
      maxVUs: 50,
    },
  },
  thresholds: {
    http_req_duration: ['p(95)<500', 'p(99)<1000'],
    stream_errors: ['rate<0.05'],
    stream_health_duration: ['p(95)<200', 'p(99)<500'],
  },
};

export default function () {
  const start = Date.now();
  const healthRes = http.get(`${STREAM_ORIGIN}/health`);
  healthDuration.add(Date.now() - start);

  const ok = check(healthRes, {
    'stream health returns 200': (r) => r.status === 200,
  });
  errorRate.add(!ok);
  sleep(0.5);

  const healthzRes = http.get(`${STREAM_ORIGIN}/healthz`);
  check(healthzRes, { 'stream healthz returns 200': (r) => r.status === 200 });
  errorRate.add(healthzRes.status !== 200);
  sleep(0.5);

  const readyzRes = http.get(`${STREAM_ORIGIN}/readyz`);
  check(readyzRes, { 'stream readyz returns 200': (r) => r.status === 200 });
  sleep(1);
}