/*
 * Nils Levandovskis nl17015
 */
window.onload = function(){
    var lookup = {};
    var days = [null];

    for (var i in schedule) {
        var day = schedule[i].day;
        if (!(day in lookup)) {
            lookup[day] = 1;
            days.push(day);
        }
    }
    var select = document.getElementById("day-select");
    for(var i = 0; i < days.length; i++) {
        var opt = days[i];
        var el = document.createElement("option");
        el.textContent = opt;
        el.value = opt;
        select.appendChild(el);
    }

    var dropdown = document.createElement('select');
    dropdown.setAttribute("id", "lecturerSelect");
    document.getElementById('lecturer-search').parentNode.appendChild(dropdown);
    dropdown.setAttribute("style","-webkit-appearance: none;");
    dropdown.style.position = 'fixed';
    dropdown.style.overflow = 'hidden';
    dropdown.style.display = "none";

    document.addEventListener("keyup", lecturerSearch);
	for (var i in schedule) {
    var lecturer = schedule[i].lecturer;
    if(!(lecturer in lecturers)){
        lecturers[lecturer] = 1;
        lecturers.push(schedule[i].lecturer);
    }
}
}
var lecturers = new Array();
var daySelect;
var timeFrom;
var timeUntil;
var room;
var lecturer;
function inputs(){
	var ok = true;
	var format;
	var h;
	var m;
	daySelect = document.getElementById("day-select").selectedIndex;
	daySelect = document.getElementsByTagName("option")[daySelect].value;



	timeFrom = document.getElementById("time-from").value;
	if(timeFrom){

		if (timeFrom.length !== 5)ok = false;
		else{
			var check;
		for(var i = 0;i<5;i++){
			 check = String(timeFrom).charAt(i)
			 alert(check);
			if(i == 2){
				if(check!==":") ok = false;
			}
			else{
				if(isNaN(parseInt(check,10))) ok = false
			}
		}
		}
		timeFrom = timeFrom.replace(":","");
		h = String(timeFrom).charAt(0)+String(timeFrom).charAt(1);
		if(h>24 || h<0) ok = false;
		m = String(timeFrom).charAt(2)+String(timeFrom).charAt(3);
		if(m>59 || m<0)	ok = false;
		if(!ok)alert('"Laiks no" ir jāpieraksta hh:mm formātā');
		timeFrom = parseInt(timeFrom,10)
	}


	timeUntil = document.getElementById("time-until").value;
	if(timeUntil){

		if (timeUntil.length !== 5)ok = false;
		else{
			var check;
		for(var i = 0;i<5;i++){
			check = String(timeUntil).charAt(i);
			if(i == 2){
				if(check!==":") ok = false;
			}
			else{
				if(isNaN(parseInt(check,10))) ok = false;
			}
		}
		}

		var isTimeFromOk = ok;
		var isTimeUntilOk = true;
		timeUntil = timeUntil.replace(":","");
		timeUntil = parseInt(timeUntil,10)
		h = String(timeUntil).charAt(0)+String(timeUntil).charAt(1);
		if(h>23||h<0){
			ok = false;
			isTimeUntilOk = false;
		}
		m = String(timeUntil).charAt(2)+String(timeUntil).charAt(3);
		if(m>59||m<0){
			ok = false;
			isTimeUntilOk = false;
		}
		if(isTimeFromOk && timeFrom>=timeUntil){
			ok = false;
			isTimeUntilOk = false;
		}
		if(!isTimeUntilOk)alert('"Laiks līdz" ir jāpieraksta hh:mm formātā un tam ir jābūt lielākam par "Laiks no"');
	}

	room = document.getElementById("room").value;
	if(room){
		if(room === parseInt(room,10))room = parseInt(room,10);
		else{
			ok = false
			alert("Telpai ir jābūt veselam skaitlim")
		}
	}

    lecturer = document.getElementById("lecturer-search").value;
	 if(lecturer){
		 var okLecturer = false;
		for(var i = 0;i<lecturers.length;i++){
			if(lecturers[i].toUpperCase().includes(lecturer.toUpperCase())) okLecturer = true;
		}
		if(!okLecturer){
			ok = false;
			alert("Nepareizs pasniedzēja vārds");
		}

			}

	alert(daySelect+""+timeFrom+""+timeUntil+""+room);
	if(ok)schedSearch();
}
var hidden = false;
function schedSearch(){
	x = document.getElementById("resTable");
	if (x){
		var y = document.getElementById("resTable").rows.length;
		for(var i = 0; i<y; i++){
			document.getElementById("resTable").deleteRow(0);
		}
	}
	var Table = document.createElement("table");
    Table.setAttribute("id", "resTable");
    document.body.appendChild(Table);

    var hRow = document.createElement("tr");
    hRow.setAttribute("id", "headRow");
    document.getElementById("resTable").appendChild(hRow);

	for(var x = 0; x<5; x++){
    var head = document.createElement("th");
	if (x==0)var txt = document.createTextNode("Diena");
	if (x==1)var txt = document.createTextNode("Laiks");
	if (x==2)var txt = document.createTextNode("Kurss");
	if (x==3){
		var txt = document.createTextNode("Telpa");
		head.setAttribute("class","hide");
	}
	if (x==4){
		var txt = document.createTextNode("Pasniedzējs");
		head.setAttribute("class","hide");
	}
	head.appendChild(txt);
    document.getElementById("headRow").appendChild(head);
	}

	var search = {};
	var result = true;

	search.day = daySelect;
	search.time_from = timeFrom;
	search.time_until = timeUntil;
	search.room = room;
    search.lecturer = lecturer;

	for (var i in schedule) {
		if (search.day!=="null"){
			if (search.day!==schedule[i].day) result = false;
		}

		if (search.time_from){
			var schedFrom = schedule[i].time_from.replace(":","");
			schedFrom = parseInt(schedFrom,10);
			if (search.time_from>schedFrom) result = false;
		}

		if (search.time_until){
			var schedUntil = schedule[i].time_until.replace(":","");
			schedUntil = parseInt(schedUntil,10);
			if (search.time_until<schedUntil) result = false;
		}

		if (search.room){
			if (search.room!==schedule[i].room) result = false;
		}

		if(search.lecturer){
			if(search.lecturer!=schedule[i].lecturer) result = false;
		}

		if (result==true){
			var Row = document.createElement("tr");
			Row.setAttribute("id","resRow"+i);
			for(var x = 0; x<5; x++){
			var res = document.createElement("td");

			document.getElementById("resTable").appendChild(Row)
				res.setAttribute("id","res"+i+x)
				if (x==0)var txt = document.createTextNode(schedule[i].day);
				if (x==1)var txt = document.createTextNode(schedule[i].time_from+"-"+schedule[i].time_until);
				if (x==2)var txt = document.createTextNode(schedule[i].course);
				if (x==3){
					var txt = document.createTextNode(schedule[i].room);
					res.setAttribute("class","hide");
				}
				if (x==4){
					var txt = document.createTextNode(schedule[i].lecturer);
					res.setAttribute("class","hide");
				}
				res.appendChild(txt);
				document.getElementById("resRow"+i).appendChild(res);
			}
		}
		result = true;
	}
	if(hidden)hide();
}
function hide(){
	var button = document.getElementById("hide");
	button.setAttribute("onclick","reveal()");
	button.textContent = "Rādīt telpu un pasniedzēju info";
	hidden = true;
	 var elements = document.getElementsByClassName('hide');
     for(var i = 0, length = elements.length; i < length; i++) {
          elements[i].style.display = 'none';
     }
}
function reveal(){
	var button = document.getElementById("hide");
	button.setAttribute("onclick","hide()");
	button.textContent = "Paslēpt telpu un pasniedzēju info";
	hidden = false;
	var elements = document.getElementsByClassName('hide');
     for(var i = 0, length = elements.length; i < length; i++) {
          elements[i].style.display = 'table-cell';
     }
}

function lecturerSearch(){

    var x = document.getElementById("lecturerSelect");
    for(var i = 0; i < x.size ; i++){
        x.remove(0);
    }


    var input = document.getElementById("lecturer-search");
    var dropdown = document.getElementById("lecturerSelect");
    var lecturerList = new Array();


    for (var i = 0; i < schedule.length; i++) {
        var lecturer = schedule[i].lecturer;
        if (!(lecturer in lecturerList) && lecturer.toUpperCase().includes(input.value.toUpperCase()) == true) {
            lecturerList[lecturer] = 1;
            lecturerList.push(lecturer);
        }
    }

    dropdown.size = lecturerList.length;


    if(lecturerList.length === 1){
        dropdown.onclick = (function(j) {return function(){
            document.getElementById("lecturer-search").value = dropdown.childNodes[0].value;
            dropdown.style.display = "none";
            return;
        };})(j);
    }

    if(lecturerList.length < 1 || input.value.length < 2 || lecturerList.toString().includes(document.getElementById("lecturer-search").value)){
        dropdown.style.display = "none";
        return;
    }
    else
    {
        dropdown.style.display = "";
    }

    var temp = new Array();

    for(var j = 0; j < lecturerList.length; j++){
        var el = document.createElement("option");
        el.textContent = lecturerList[j];
        el.value = lecturerList[j];
        temp.push(lecturerList[j]);
        el.onclick = (function(el) {return function(){
            document.getElementById("lecturer-search").value = el.value;
            dropdown.style.display = "none";
            return;
        };})(el);
        dropdown.appendChild(el);
    }
}