var Redlock = require('redlock');
var RedisService = module.exports;

export class RedlockService {
    _redisClient: any;
    ttl: number;
    redlock: any;
    constructor(redisClient) {
        this._redisClient = redisClient;
        this._redisClient.on("error", function (err) { 
            console.error("Redis:Error:" + err); 
        }); 
        this.ttl = 1000;
        this.redlock = new Redlock(
            [this._redisClient],
            {
                // the expected clock drift; for more details
                // see http://redis.io/topics/distlock
                driftFactor: 0.01, // time in ms
        
                // the max number of times Redlock will attempt
                // to lock a resource before erroring
                retryCount:  10,
        
                // the time in ms between attempts
                retryDelay:  200, // time in ms
        
                // the max time in ms randomly added to retries
                // to improve performance under high contention
                // see https://www.awsarchitectureblog.com/2015/03/backoff.html
                retryJitter:  200 // time in ms
            }
        );
    
        this.redlock.on('clientError', function(err) {
            console.error('A redis error has occurred:', err);
        });
    }

    getWithModify() {
        
    }
}