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// npm install graphql-redis-subscriptions ioredis

import { RedisPubSub } from 'graphql-redis-subscriptions';
import Redis from 'ioredis';

const options = {
  host: process.env.REDIS_HOST || '127.0.0.1',
  port: Number(process.env.REDIS_PORT) || 6379,
  password: process.env.REDIS_PASSWORD,
  retryStrategy: (times) => Math.min(times * 50, 2000),
};

// Two Redis connections: one pub, one sub
const pubsub = new RedisPubSub({
  publisher:  new Redis(options),
  subscriber: new Redis(options),
});

// Use exactly the same API as the in-memory PubSub
const EVENTS = {
  ORDER_UPDATED: 'ORDER_UPDATED',
  STOCK_CHANGED: 'STOCK_CHANGED',
};