const redis = require("redis");
// require("../config/env.config");

const { REDIS_HOST, REDIS_PORT, REDIS_DBNAME, REDIS_USER, REDIS_PASSWD } =
	process.env; // REDIS_USER 和 REDIS_PASSWD，需要服务器配置ACL用户名密码
const URL = `redis://${REDIS_USER}:${REDIS_PASSWD}@${REDIS_HOST}:${REDIS_PORT}/${REDIS_DBNAME}`;

// https://github.com/redis/node-redis/tree/master/docs
// module.exports = redis.createClient({URL});
const client = redis.createClient({
	// url: URL,
	socket: { host: REDIS_HOST, port: REDIS_PORT },
	password: REDIS_PASSWD,
	// database: REDIS_DBNAME,
	// legacyMode: true, // 语法向后(v3)部分兼容
});

client.on("error", (err) => console.log(`redis client ~ Error ${err}`));
client.on("connect", () => console.log("redis client ~ connect"));
client.on("reconnecting", () => console.log("redis client ~ reconnecting"));
client.on("ready", () => console.log("redis client ~ ready"));
client.on("end", () => console.log("redis client ~ end"));

client.connect();
client.ping();
// try {
// } catch (error) {
// 	console.log(error);
// }

module.exports = client;

//* 方式二：redis 连接池
//! 报错，不可用
/* var redisPool = require("redis-connection-pool")("myRedisPool", {
	host: REDIS_HOST, // default
	port: REDIS_PORT, //default
	max_clients: 30, // defalut
	perform_checks: false, // checks for needed push/pop functionality
	database: 0, // database number to use
	options: {
		auth_pass: REDIS_PASSWD,
	}, //options for createClient of node-redis, optional
});
redisPool.set("test-key", "foobar", function (err) {
	redisPool.get("test-key", function (err, reply) {
		console.log(reply); // 'foobar'
	});
}); */