import fp from 'fastify-plugin'
import Redis from 'ioredis'

declare module 'fastify' {
  interface FastifyInstance {
    redis: Redis
  }
}

export const redisPlugin = fp(async (app) => {
  const redisUrl = process.env.REDIS_URL ?? 'redis://localhost:6379'
  const keyPrefix = process.env.REDIS_KEY_PREFIX ? `${process.env.REDIS_KEY_PREFIX}:` : ''
  const redis = new Redis(redisUrl, { keyPrefix })

  app.decorate('redis', redis)

  app.addHook('onClose', async () => {
    await redis.quit()
  })
})