const IORedis = require("ioredis");

function makeRedis() {
  const url = process.env.REDIS_URL || "";
  const opts = url ? url : {
    host: process.env.REDIS_HOST || "127.0.0.1",
    port: Number(process.env.REDIS_PORT || 6379),
  };
  const r = new IORedis(opts, {
    retryStrategy: times => Math.min(times * 200, 10_000),
    maxRetriesPerRequest: null,
    enableReadyCheck: true,
  });
  r.on("error", e => console.error("redis error", e.message));
  r.on("end", () => console.error("redis connection ended"));
  return r;
}

module.exports = { makeRedis };