import { randomBytes } from 'node:crypto'

const TOKEN_TTL_MS = 60 * 1000
const tokens = new Map()

function purgeExpired() {
  const now = Date.now()
  for (const [key, entry] of tokens) {
    if (entry.expiresAt <= now) tokens.delete(key)
  }
}

export function createStaffPreviewToken(payload) {
  purgeExpired()
  const token = randomBytes(32).toString('hex')
  tokens.set(token, {
    ...payload,
    expiresAt: Date.now() + TOKEN_TTL_MS,
  })
  return token
}

export function consumeStaffPreviewToken(token) {
  purgeExpired()
  const entry = tokens.get(token)
  if (!entry) return null
  tokens.delete(token)
  if (entry.expiresAt <= Date.now()) return null
  return entry
}