function modAStatsUpdate(step) {
step = parseInt(step, 10);
if ((step < -1) || (step > 1)) { return; }

let chartok = true;
if (typeof astatsChart === 'undefined') {
chartok = false;
Chart.helpers.each(Chart.instances, function(instance) {
if (instance.chart.canvas.id == 'modastatsgraph') {
var astatsChart = instance;
chartok = true;
}
});
}
if (!chartok) { return; }

var boxObj = document.getElementById('modastats_box');
var dataObj = document.getElementById('modastats_data');
var descObj = document.getElementById('modastat_desc');

var statsData = {};
statsData.year = parseInt(boxObj.getAttribute('data-year'), 10);
statsData.month = parseInt(boxObj.getAttribute('data-month'), 10);

if (step == 0) {//switch
statsData.days = parseInt(boxObj.getAttribute('data-days'), 10);
if (boxObj.getAttribute('data-type') == 'clicks') {
statsData.type = 'visits';
statsData.data = dataObj.getAttribute('data-visits').split(',');
astatsChart.data.datasets[0].label = descObj.getAttribute('data-visitslng');
} else {
statsData.type = 'clicks';
statsData.data = dataObj.getAttribute('data-clicks').split(',');
astatsChart.data.datasets[0].label = descObj.getAttribute('data-clickslng');
}
boxObj.setAttribute('data-type', statsData.type);

let k = 0, v = 0;
for (k=0; k < statsData.days; k++) {
v = parseInt(statsData.data[k], 10);
astatsChart.data.datasets[0].data[k] = v;
}

astatsChart.update();
if (statsData.type == 'clicks') {
descObj.innerHTML = descObj.getAttribute('data-cdesc');
document.getElementById('modastats_btn').innerHTML = '<i class="fas fa-mouse-pointer"></i><span class="elx5_lmobhide"> '+descObj.getAttribute('data-clickslng')+'</span>';
} else {
descObj.innerHTML = descObj.getAttribute('data-vdesc');
document.getElementById('modastats_btn').innerHTML = '<i class="fas fa-user"></i><span class="elx5_lmobhide"> '+descObj.getAttribute('data-visitslng')+'</span>';
}
return;
}

statsData.month = statsData.month + step;
if (statsData.month == 0) {
statsData.month = 12;
statsData.year--;
} else if (statsData.month == 13) {
statsData.month = 1;
statsData.year++;
}

modAStatsLoad(statsData.year, statsData.month, boxObj, dataObj, astatsChart);
}


function modAStatsLoad(year, month, boxObj, dataObj, astatsChart) {
var edata = {};
edata.year = year;
edata.month = month;
edata.format = 'json';
edata.rnd = Math.floor((Math.random()*100)+1);
edata.f = 'modules/mod_adminstats/req.php';

var successfunc = function(xreply) {
elx5StopPageLoader();
try {
var jsonObj = JSON.parse(xreply);
} catch(e) {
alert(e.message);
return false;
}
if (parseInt(jsonObj.success, 10) < 1) {
if (jsonObj.message != '') {
alert(jsonObj.message);
} else {
alert('Action failed!');
}
} else {
boxObj.setAttribute('data-year', jsonObj.year);
boxObj.setAttribute('data-month', jsonObj.month);
boxObj.setAttribute('data-days', jsonObj.daysnum);
dataObj.setAttribute('data-clicks', jsonObj.clicks);
dataObj.setAttribute('data-visits', jsonObj.visits);
document.getElementById('modastat_desc').setAttribute('data-cdesc', jsonObj.clicksdesc);
document.getElementById('modastat_desc').setAttribute('data-vdesc', jsonObj.visitsdesc);

var statsData = {};
if (boxObj.getAttribute('data-type') == 'clicks') {
statsData.type = 'clicks';
statsData.data = dataObj.getAttribute('data-clicks').split(',');

document.getElementById('modastat_desc').innerHTML = jsonObj.clicksdesc;
} else {
statsData.type = 'visits';
statsData.data = dataObj.getAttribute('data-visits').split(',');
document.getElementById('modastat_desc').innerHTML = jsonObj.visitsdesc;
}
statsData.days = parseInt(jsonObj.daysnum, 10);

let newlabels = [], k = 0, v = 0;
for (k=0; k < statsData.days; k++) {
let w = k + 1;
v = parseInt(statsData.data[k], 10);
astatsChart.data.datasets[0].data[k] = v;
newlabels.push(w);
}
astatsChart.data.labels = newlabels;
astatsChart.update();
}
};

var errorfunc = function (XMLHttpRequest, textStatus, errorThrown) {
elx5StopPageLoader();
alert('Action failed! '+errorThrown);
};

var eurl = document.getElementById('modastats_box').getAttribute('data-inpage');
elx5StartPageLoader();
elxAjax('POST', eurl, edata, null, null, successfunc, errorfunc);
}