import { createClient } from 'redis'

// Only create Redis client if REDIS_URL is provided
let client: ReturnType<typeof createClient> | null = null

if (process.env.REDIS_URL) {
  client = createClient({
    url: process.env.REDIS_URL,
  })

  client.on('error', (err) => {
    console.error('Redis Client Error:', err)
  })

  client.on('connect', () => {
    console.log('Connected to Redis')
  })

  client.on('ready', () => {
    console.log('Redis Client Ready')
  })

  client.on('end', () => {
    console.log('Redis Client Disconnected')
  })
} else {
  console.warn('Redis disabled - REDIS_URL not provided')
}

// Connect to Redis
const connectRedis = async () => {
  if (!client) {
    console.warn('Redis client not initialized - sessions will use memory store')
    return null
  }

  if (!client.isOpen) {
    try {
      await client.connect()
    } catch (error) {
      console.error('Failed to connect to Redis:', error)
      // Don't throw error - let app continue without Redis
      return null
    }
  }
  return client
}

export { client as redisClient, connectRedis }