var redis = require("redis");
var util = require('util');
var EventEmitter = require('events').EventEmitter;
var http = require("http");

var redisprefix = "flukso:";

var Flukso = function(hostname, pathname) {
    var self = this;

    var redisClient = redis.createClient();
    var regexp = /([0-9]+)\]\]$/; // /\(([0-9]+) hosts* up\)/;


    redisClient.on("connect", function () {
        console.log("connected to redis");
        self.emit('ready');
    });

    this.pollPower = function() {

        http.request({ host: hostname, path: pathname }, function(response) {
            var str = '';

            response.on('data', function(chunk) {
                str += chunk;
            });

            response.on('end', function () {
//                console.log("http received: " + str);

                var matches = regexp.exec(str);
                if(matches != null && matches.length == 2) {
                    var time = Date.now();

                    redisClient.zremrangebyscore(redisprefix + 'power', "-inf", time - 7*24*60*1000);

                    var num = matches[1];

                    redisClient.zadd(redisprefix + 'power', time, time + "|" + num, function() {
                        self.emit('done', parseInt(num));
                    });
                }
            });
        }).end();
    };

//    this.getHistory = function(start, end, callback) {
//
//        redisClient.zrangebyscore(redisprefix + 'power', start, end, function(err, replies) {
//            var data = [];
//
//            replies.forEach(function (reply, i) {
//                var line = reply.split('|');
//                data.push( { at: moment(parseInt(line[0])).format(), value: line[1] });
//            });
//
//            callback(data);
//        });
//    };
};

util.inherits(Flukso, EventEmitter);

module.exports = Flukso;