export const SESSION_COOKIE_NAME = "session"

const SESSION_KEY_PREFIX = "label:session:"

const normalizeClientIp = (ip: string) => ip.replace(/^::ffff:/, "")

export const createSessionRedisKey = () =>
  `${SESSION_KEY_PREFIX}${crypto.randomUUID()}`

export const getSessionRedisKeyFromCookieValue = (
  sessionCookieValue?: string | null
) => {
  if (!sessionCookieValue) {
    return ""
  }

  try {
    const parsedValue = JSON.parse(sessionCookieValue)
    return typeof parsedValue === "string" ? parsedValue : ""
  } catch {
    return sessionCookieValue
  }
}

export const getClientIpFromRequest = (req: any) => {
  const forwardedFor =
    req?.headers?.get?.("x-forwarded-for") ||
    req?.headers?.["x-forwarded-for"] ||
    ""
  const clientIP =
    forwardedFor?.split(",")[0]?.trim() || req?.socket?.remoteAddress || ""

  return normalizeClientIp(clientIP)
}