/*
Calendar JS
*/

var dateNow = new Date();
var currDay = dateNow.getDate(); 
var currMon = dateNow.getMonth();
var currYear = dateNow.getFullYear();
var cellDay = document.getElementsByTagName('td');
var listMon = document.getElementById("select-months");
var listYear = document.getElementById("select-years");
drawCalender(currYear, currMon);
showlistYear();
selectDay();

// Draw Calendar 
function drawCalender(year, month) {
	parseInt(year);
	parseInt(month);
	var firstDay = new Date(year, month, 1).getDay();
	var lastDate = new Date(year, month + 1, 0).getDate();
	var i, day;
	day = 13 + firstDay;

	for (i = 13; i < 55; i++) {
		cellDay[i].innerHTML = "";
		cellDay[i].style.backgroundColor = "#fff";
	}

	for (i = 1; i <= lastDate; i++) {
		cellDay[day].innerHTML = i;
		day++;
	}

	if (year === dateNow.getFullYear()) {
		if (month === dateNow.getMonth()) {
			var showCurdate = 12 + firstDay + dateNow.getDate();
			cellDay[showCurdate].style.backgroundColor = "#00f3ff";
		}
	}
	 showTimeBox();
}

//show list Year in combobox
function showlistYear() {
	for (var i = 1954; i < 2100; i++) {
		listYear.innerHTML += "<option value='" + i + "'>" + i + "</option>";
	}
	drawCalender(currYear, currMon);
}

function showTimeBox() {
	listMon.value = currMon;
	listYear.value = currYear;
}

function chooseMonth(month) {
	currMon += month;
	if (currMon < 0) {
		currMon = 11;
		currYear -= 1;
	}
	if (currMon > 11) {
		currMon = 0;
		currYear += 1;
	}
	checkTime();
	drawCalender(currYear, currMon);
}
// Check the year is between 1954 and 2100
function checkTime() {
	if (currYear < 1954) {
		currYear = 1954;
	}
	if (currYear >= 2100) {
		currYear = 2099;
	}
}

function chooseYear(year) {
	currYear = parseInt(currYear) + parseInt(year);
	checkTime();
	drawCalender(currYear, currMon);
}

function selectMonth() {
	currMon = parseInt(listMon.value);
	drawCalender(currYear, currMon);
}

function selectYear() {
	currYear = parseInt(listYear.value);
	drawCalender(currYear, currMon);
}

function selectDay() {
	var dayAnyNow = document.getElementById("day-now");
	dayAnyNow.value = currDay + "/" + (currMon + 1) + "/" + currYear;

	for (var i = 13; i < 55; i++) {
		cellDay[i].addEventListener("click", function () {
			var dayCheck = this.innerHTML;

			for (var j = 13; j < 55; j++) {
				cellDay[j].style.border = "";
			}
			if (dayCheck != "") {
				dayAnyNow.value = dayCheck + "/" + (currMon + 1) + "/" + currYear;
				this.style.border = "1px solid ";
			}
		});
	}
}