function HideFrm(id)
{
	var Item = document.getElementById(id);
	if (Item)
		Item.style.display = 'none';
}

function CloseFrm(id)
{
	var Item = document.getElementById(id);
	Item.remove();
}

function getJSON(url, callback) {
	var request = new XMLHttpRequest();
	request.open("GET", url);
	request.onload = function() {
		if(callback)
			callback(request);
	}
	request.responseType = 'json';
	request.send();
}

function postJSON(url, data, callback) {
	var request = new XMLHttpRequest();
	request.open("POST", url);
	//request.onreadystatechange = function() {
	request.onload = function() {
		if(request.readyState === 4 && callback)
			callback(request);
	}
	request.responseType = 'json';
	request.setRequestHeader("Content-Type", "application/json");
	request.send(JSON.stringify(data));
}
 function SendReq()
{
	var FrmBlock = document.getElementById("IDFrmReqBlock");
	var BtnSend = document.getElementById("IDBtnSend");
	BtnSend.disabled = true;
	//var dWait = document.createElement('div');
	//FrmBlock.appendChild(dWait);
	//dWait.className = 'WaitingBlock';
	var lbSpec = document.getElementById('id_spec');
	var lbEForm = document.getElementById('id_eform');
	lbSpec.options[lbSpec.options.selectedIndex].value = lbSpec.options[lbSpec.options.selectedIndex].text;
	lbEForm.options[lbEForm.options.selectedIndex].value = lbEForm.options[lbEForm.options.selectedIndex].text;
	var Frm = document.getElementById("IDFrmReq");
	var frmData = new FormData(Frm);
	var frmJSON = Object.fromEntries(frmData.entries());
	//var rJSON = JSON.stringify(frmJSON, null, 2);	
	//console.log(frmJSON);
	postJSON("send_req.php", frmJSON, function(req){	
		//var newID = req.response;
		//alert('Заявка отправлена. В ближайшее время мы с Вами свяжемся. Спасибо.');
		//console.log(req.response['res']);
		//console.log(req);//alert(req.response['res']);
		HideFrm("IDFrmReqBlock");
		var dMainBlock = document.getElementById('MainBlock');
		var dInfo = document.createElement('div');
		dMainBlock.appendChild(dInfo);
		dInfo.className = 'Message';
		dInfo.innerHTML = 'Ваша заявка отправлена. В ближайшее время мы с Вами свяжемся. Благодарим за обращение.';
	});
}

function LoadPAForm()
{
	var lbSpec = document.getElementById('id_spec');
	var lbEForm = document.getElementById('id_eform');
	var url = './get_data.php?type=spec';
	var request = new XMLHttpRequest();
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		var rowsJSON = request.response;
		var req = JSON.parse(rowsJSON);	
		//console.log(req);	id_spec, sname, scode	
		for(i = 0; i < req.rows.length; i++){
			var optn = new Option(req.rows[i].scode+"  "+req.rows[i].sname, req.rows[i].id_spec, false, false);
			//console.log(slink);			
			//lbSpec.options.appendChild(optn);
			lbSpec.options[lbSpec.options.length] = optn;
		}		
	};
	request.send();
	lbSpec.onchange = function() {
		LoadEForm(lbSpec.options[lbSpec.options.selectedIndex].value);
	}
}

function LoadEForm(idSpec)
{
	var lbEForm = document.getElementById('id_eform');
	lbEForm.options.length = 1;
	var url = './get_data.php?type=efs&val='+idSpec;
	var request = new XMLHttpRequest();
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		var rowsJSON = request.response;
		var req = JSON.parse(rowsJSON);	
		//console.log(req);	id_eform, id_spec, efname	
		for(i = 0; i < req.rows.length; i++){
			var optn = new Option(req.rows[i].efname, req.rows[i].id_eform, false, false);
			//console.log(slink);			
			//lbSpec.options.appendChild(optn);
			lbEForm.options[lbEForm.options.length] = optn;
		}		
	};
	request.send();
} function ShowElementID(id) {
	alert(id);
}
 window.addEventListener('scroll', function() {
  let tp = document.getElementById('ID_top-pos');
  let ml = document.getElementById('ID_EIOS_menu-list');
  let md = document.getElementById('ID_EIOS_menu-dummy');
  if (tp.getBoundingClientRect().top<0 && !ml.classList.contains('fixed-top-pos'))
  {    
    ml.classList.add('fixed-top-pos');
    md.style.display = 'block';
    md.style.height = ml.offsetHeight;
  } else
  if (tp.getBoundingClientRect().top>0) {
    ml.classList.remove('fixed-top-pos');
    md.style.display = 'none';
  };
});

function LoadGroupsList()
{
	var lbGrList = document.getElementById('id_group');
	var dSchedule = document.getElementById('id_schedule');
	var url = './get_data.php?type=grlist';
	var request = new XMLHttpRequest();
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		var rowsJSON = request.response;
		var req = JSON.parse(rowsJSON);			
		for(i = 0; i < req.rows.length; i++){
			var optn = new Option(req.rows[i].gname, req.rows[i].id, false, false);
			//console.log(slink);			
			//lbSpec.options.appendChild(optn);
			lbGrList.options[lbGrList.options.length] = optn;
		}		
	};
	request.send();
	lbGrList.onchange = function() {
		LoadSchedule(lbGrList.options[lbGrList.options.selectedIndex].value);
	}
}

function LoadSchedule(idGroup)
{
	var sb = document.getElementById('ID_schedule-block');	
	var url = './get_data.php?type=cursch&grp='+idGroup;
	var request = new XMLHttpRequest();
	sb.innerHTML = "";
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		let rowsJSON = request.response;
		let req = JSON.parse(rowsJSON);	
		//console.log(req);
		let cdate = "";
		if (req) {
			for(i = 0; i < req.rows.length; i++){
				if (cdate != req.rows[i].cdate) {
					var item_day = document.createElement("div");
					item_day.classList.add('schedule-item-day'); 
					if (req.rows[i].curd == true) {
						item_day.classList.add('shedule-current-day');
					}
					cdate = req.rows[i].cdate;
					let sidDate = document.createElement("div");
					sidDate.classList.add('sid-date');
					sidDate.innerHTML = req.rows[i].wday+', '+req.rows[i].cdate;
					let sidLine = document.createElement("div");
					sidLine.classList.add('sid-line');
					item_day.append(sidDate);
					item_day.append(sidLine);
				}
				let sidClass = document.createElement("div");
				sidClass.classList.add('sid-class'); //flex
				let sidcCTime, sidcDName, sidcTName, sidcANum;
				sidcCTime = document.createElement("div");
				sidcCTime.classList.add('sidc-ctime'); 
				sidcCTime.innerHTML = req.rows[i].ctime;
				sidcDName = document.createElement("div");
				sidcDName.classList.add('sidc-dname'); 
				sidcDName.innerHTML = req.rows[i].dname;
				sidcTName = document.createElement("div");
				sidcTName.classList.add('sidc-tname'); 
				sidcTName.innerHTML = req.rows[i].tname;
				sidcANum = document.createElement("div");
				sidcANum.classList.add('sidc-anum'); 
				sidcANum.innerHTML = req.rows[i].anum;
//req.rows[i].gnum
				sidClass.append(sidcCTime, sidcDName, sidcTName, sidcANum);
				//console.log(slink);			
				//lbSpec.options.appendChild(optn);		
				if (item_day) {
					item_day.append(sidClass);
					sb.append(item_day);
				}
			}
		} else {
			var item_day = document.createElement("div");
			item_day.classList.add('schedule-item-day'); 
			let sidDate = document.createElement("div");
			sidDate.classList.add('sid-date');
			sidDate.innerHTML = "На указанный период расписание отсутствует.";
			item_day.append(sidDate);
			sb.append(item_day);
		}
	};
	request.send(); 
}

window.onload=LoadGroupsList;