// Returns a connected Redis/Valkey client, or null when CACHE_DRIVER=memory.
// Consumers must check for null before using Redis-specific features.
// Use case: when project is going to have LiveView in future.

const useRedis = process.env.CACHE_DRIVER !== 'memory';

if (!useRedis) {
  console.log('ℹ️   Cache driver: memory (Redis skipped)');
  module.exports = null;
} else {
  const { createClient } = require('redis');

  const client = createClient({
    url: process.env.REDIS_URL || 'redis://127.0.0.1:6379',
  });

  client.on('error', (err) => console.error('[Redis] Connection error:', err));

  (async () => {
    await client.connect();
    console.log('✅  Redis connected.');
  })();

  module.exports = client;
}