/**
 * Phase-0-Baseline: parallele GET /api/health (kein Auth).
 * BASE_URL optional, z. B. https://dev.kairo.jinkendo.de
 *
 * K6_CI=1: leichtere Last für Self-hosted Runner (Raspberry Pi).
 */
import http from 'k6/http'
import { check } from 'k6'

const isCi = __ENV.K6_CI === '1' || __ENV.K6_CI === 'true'
const vus = parseInt(__ENV.K6_VUS || (isCi ? '5' : '10'), 10)
const duration = __ENV.K6_DURATION || (isCi ? '15s' : '30s')
const p95Ms = parseInt(__ENV.K6_P95_MS || (isCi ? '5000' : '3000'), 10)

export const options = {
  scenarios: {
    health: {
      executor: 'constant-vus',
      vus,
      duration,
      gracefulStop: '5s',
      tags: { scenario: 'health' },
      exec: 'health',
    },
  },
  thresholds: {
    http_req_failed: ['rate<0.05'],
    'http_req_duration{scenario:health}': [`p(95)<${p95Ms}`],
  },
  summaryTrendStats: ['avg', 'min', 'med', 'max', 'p(90)', 'p(95)'],
}

const BASE = (__ENV.BASE_URL || 'https://dev.kairo.jinkendo.de').replace(/\/$/, '')

export function health() {
  const res = http.get(`${BASE}/api/health`, { tags: { scenario: 'health' } })
  check(res, {
    'health 2xx': (r) => r.status >= 200 && r.status < 300,
  })
}

export function handleSummary(data) {
  const failed = data.metrics.http_req_failed?.values?.rate ?? 0
  const p95 = data.metrics.http_req_duration?.values?.['p(95)'] ?? 0
  const lines = [
    `k6 summary: BASE=${BASE} vus=${vus} duration=${duration}`,
    `  http_req_failed=${(failed * 100).toFixed(2)}%  p(95)=${p95.toFixed(1)}ms (limit ${p95Ms}ms)`,
  ]
  return { stdout: lines.join('\n') + '\n' }
}