import 'server-only';

import { Redis } from '@upstash/redis';

let cachedRedis: Redis | null | undefined;

export function getRedisClient(): Redis | null {
  if (cachedRedis !== undefined) {
    return cachedRedis;
  }

  if (!process.env.UPSTASH_REDIS_REST_URL || !process.env.UPSTASH_REDIS_REST_TOKEN) {
    cachedRedis = null;
    return cachedRedis;
  }

  cachedRedis = Redis.fromEnv();
  return cachedRedis;
}