import Redis from 'ioredis'

let _client: Redis | null = null

export function useRedis(): Redis {
    if (_client) return _client

    const url = useRuntimeConfig().redisUrl
    if (!url) {
        throw createError({
            statusCode: 500,
            statusMessage: 'REDIS_URL não configurada (definir NUXT_REDIS_URL).',
        })
    }

    _client = new Redis(url, {
        lazyConnect: false,
        maxRetriesPerRequest: 3,
        enableReadyCheck: true,
    })

    _client.on('error', (err) => {
        console.error('[redis] error:', err.message)
    })

    return _client
}