import { createHash } from 'node:crypto'

export {
  ANALYTICS_ACTIVE_SESSION_TTL_SECONDS,
  ANALYTICS_CHART_MAX_DAYS,
  ANALYTICS_ENGAGED_MIN_SECONDS,
  ANALYTICS_MAX_DURATION_SECONDS,
  ANALYTICS_RETENTION_PURGE_INTERVAL_MS,
  ANALYTICS_SCROLL_THRESHOLDS,
  ANALYTICS_VISITOR_HASH_RETENTION_DAYS,
  clampAnalyticsDurationSeconds,
  clampAnalyticsScrollRatio,
  getAnalyticsDayBefore,
  getAnalyticsDayKey,
  getNewScrollBucketColumns,
  isBotUserAgent,
  isTrackableAnalyticsPath,
  normalizePageSlugForAnalytics,
  normalizePostSlugForAnalytics
} from './analytics-shared.js'

/**
 * 일 단위 익명 방문자 해시를 생성한다. 원문 IP·UA는 저장하지 않는다.
 * @param {{ day: string, ip: string, userAgent: string, secret: string }} input - 해시 입력
 * @returns {string} visitor hash
 */
export const createDailyVisitorHash = ({ day, ip, userAgent, secret }) => {
  const payload = `${day}|${ip}|${userAgent}|${secret}`
  return createHash('sha256').update(payload).digest('hex')
}

/**
 * 실시간 세션 해시를 생성한다.
 * @param {{ clientSessionId: string, visitorHash: string, secret: string }} input - 해시 입력
 * @returns {string} session hash
 */
export const createRealtimeSessionHash = ({ clientSessionId, visitorHash, secret }) => {
  const payload = `${clientSessionId}|${visitorHash}|${secret}`
  return createHash('sha256').update(payload).digest('hex')
}