var imageAddr = 'https://cmo2.livingbusiness.it/app/images/engage_logo.png';
var downloadSize = 81538; //bytes
function ShowProgressMessage(msg) {
    if (console) {
        if (typeof msg == "string") {
            console.log(msg);
        } else {
            for (var i = 0; i < msg.length; i++) {
                console.log(msg[i]);
            }
        }
    }

    $('#internet_status').attr('title',msg);
}

function InitiateSpeedDetection() {
    //ShowProgressMessage("Loading the image, please wait...");
    window.setTimeout(MeasureConnectionSpeed, 1);
};

if (window.addEventListener) {
    window.addEventListener('load', InitiateSpeedDetection, false);
} else if (window.attachEvent) {
    window.attachEvent('onload', InitiateSpeedDetection);
}

function MeasureConnectionSpeed() {
    var startTime, endTime;
    var download = new Image();
    download.onload = function () {
        endTime = (new Date()).getTime();
        showResults();
    }

    download.onerror = function (err, msg) {
        ShowProgressMessage("Invalid image, or error downloading");
    }

    startTime = (new Date()).getTime();
    var cacheBuster = "?nnn=" + startTime;
    download.src = imageAddr + cacheBuster;

    function showResults() {
        var led_status = document.getElementById("internet_status");
        var duration = (endTime - startTime);
        var bitsLoaded = downloadSize * 8;
        var speedBps = (downloadSize*8*1000/duration).toFixed(2);
        var speedKbps = (speedBps/1024).toFixed(2);
        var speedMbps = (speedKbps*20/2500).toFixed(2);
        $('#internet_status').attr('title',duration+"ms "+(downloadSize/1024).toFixed(2)+"kb "+speedMbps+"Mbps");
        if (speedMbps>=7){
            $('#internet_status').removeClass('fa-battery-0');
            $('#internet_status').removeClass('fa-battery-1');
            $('#internet_status').removeClass('fa-battery-2');
            $('#internet_status').removeClass('fa-battery-3');
            $('#internet_status').addClass('fa-battery-4');
            $('#internet_status').css('color','#1CCC30');
        } else if (speedMbps<7 && speedMbps>=4){
            $('#internet_status').removeClass('fa-battery-0');
            $('#internet_status').removeClass('fa-battery-1');
            $('#internet_status').removeClass('fa-battery-2');
            $('#internet_status').removeClass('fa-battery-4');
            $('#internet_status').addClass('fa-battery-3');
            $('#internet_status').css('color','#A1F244');
        } else if (speedMbps<4 && speedMbps>=2){
            $('#internet_status').removeClass('fa-battery-0');
            $('#internet_status').removeClass('fa-battery-1');
            $('#internet_status').removeClass('fa-battery-3');
            $('#internet_status').removeClass('fa-battery-4');
            $('#internet_status').addClass('fa-battery-2');
            $('#internet_status').css('color','#F2DE5B');
        } else if (speedMbps<2 && speedMbps>=1){
            $('#internet_status').removeClass('fa-battery-0');
            $('#internet_status').removeClass('fa-battery-2');
            $('#internet_status').removeClass('fa-battery-3');
            $('#internet_status').removeClass('fa-battery-4');
            $('#internet_status').addClass('fa-battery-1');
            $('#internet_status').css('color','#F26C2E');
        } else {
            $('#internet_status').removeClass('fa-battery-1');
            $('#internet_status').removeClass('fa-battery-2');
            $('#internet_status').removeClass('fa-battery-3');
            $('#internet_status').removeClass('fa-battery-4');
            $('#internet_status').addClass('fa-battery-0');
            $('#internet_status').css('color','#F20707');
        }
        ShowProgressMessage([
            //"Your connection speed is:",
            //speedBps + " bps",
            //speedKbps + " kbps",
            //"<span style='font-size:20px;'>"+speedMbps + " Mbps</span>"
            duration+"ms "+(downloadSize/1024).toFixed(2)+"kb "+speedMbps+"Mbps"
        ]);
    }
}