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

export const options = {
  scenarios: {
    // Ramp up from 10 to 50 virtual users pushing sustained load
    sustained_load: {
      executor: 'ramping-vus',
      startVUs: 10,
      stages: [
        { duration: '10s', target: 50 },  // Ramp up to 50 VUs
        { duration: '30s', target: 50 },  // Stay at 50 VUs (~1,000+ req/s)
        { duration: '5s', target: 0 },    // Ramp down
      ],
    },
  },
  thresholds: {
    http_req_duration: ['p(95)<50'], // 95% of API responses under 50ms
    http_req_failed: ['rate<0.01'],  // Less than 1% failure
  },
};

export default function () {
  const url = __ENV.API_URL || 'http://localhost:8000/api/v1/cdr/raw';
  const payload = JSON.stringify({
    raw_id: `load-${__VU}-${__ITER}-${Date.now()}`,
    src_ip: '10.240.1.1',
    device_id: '310410998877665',
    caller_num: '+19875551234',
    svc: '4G_DATA',
    up_bytes: 1048576,
    down_bytes: 4194304,
    rat: 6,
    lac: '4021',
    ci: '8812',
    epoch_start: 1726070000,
    epoch_end: 1726070300,
  });

  const params = {
    headers: { 'Content-Type': 'application/json' },
  };

  const res = http.post(url, payload, params);
  check(res, {
    'status is 202 or 429': (r) => r.status === 202 || r.status === 429,
  });
}