// page init
$(function(){
	initInputs();
	initGallery();
	initNavigation();
});

// gallery init
function initGallery() {
	$('div.gallery-holder').randomGallery({
		slidesHolder: '> ul',
		slides: '> li',
		autoSlide: true,
		switchTime: 5000,
		animSpeed: 500
	})
}

// main navigation init
function initNavigation() {
	initAutoScalingNav({
		menuId: "nav",
		minPaddings: 10
	});
}

// clear inputs on focus
function initInputs() {
	clearFormFields({
		clearInputs: true,
		clearTextareas: true,
		passwordFieldText: true,
		addClassFocus: "focus",
		filterClass: "default"
	});
}

// random gallery module
$.fn.randomGallery = function(opt) {
	opt = $.extend({
		slides: '.slideset li',
		pagerLinks: '.switcher li',
		waitAnimation: false,
		switchTime: 5000,
		animSpeed: 650,
		autoSlide: false,
		easing: 'swing',
		activeClass: 'active'
	},opt)
	
	return this.each(function(){
		// gallery options
		var gallery = $(this);
		var pagerLinks = gallery.find(opt.pagerLinks);
		var slidesHolder = gallery.find(opt.slidesHolder);
		var slides = slidesHolder.find(opt.slides);
		var slidesCount = slides.length;
		var slideWidth = slides.eq(0).outerWidth(true);
		var slideHeight = slides.eq(0).outerHeight(true);
		var currentIndex = 0;
		var oldIndex = currentIndex;
		var animating = false;
		var direction;
		var timer;

		// slider height
		gallery.css({position:'relative'});
		slidesHolder.css({overflow:'hidden',height:slides.eq(0).outerHeight(true)});
		slides.show().css({position:'absolute',top:0,left:slideWidth});
		slides.eq(currentIndex).css({left:0});

		// gallery control
		pagerLinks.each(function(_ind){
			$(this).click(function(){
				if(animating) return;
				if(_ind != currentIndex) {
					oldIndex = currentIndex;
					currentIndex = _ind;
					direction = (oldIndex < currentIndex);
					switchSlide();
				}
				return false;
			});
		});
		function prevSlide() {
			if(animating) return;
			oldIndex = currentIndex;
			if(currentIndex > 0) currentIndex--;
			else currentIndex = slidesCount-1;
			direction = false;
			switchSlide();
		}
		function nextSlide() {
			if(animating) return;
			oldIndex = currentIndex;
			if(currentIndex < slidesCount-1) currentIndex++;
			else currentIndex = 0;
			direction = true;
			switchSlide();
		}
		
		var effectsCount = 4;
		var effectIndex = 0;
		function prepareEffect(obj, effectIndex) {
			switch(effectIndex) {
				case 0: // top to bottom
					obj.css({top:-slideHeight,left:0});
					return {top:0}
				case 1: // right to left
					obj.css({top:0,left:slideWidth});
					return {left:0}
				case 2: // bottom to top
					obj.css({top:slideHeight,left:0});
					return {top:0}
				case 3: // left to right
					obj.css({top:0,left:-slideWidth});
					return {left:0}
			}
		}

		// gallery animation
		function refreshStatus() {
			pagerLinks.removeClass(opt.activeClass).eq(currentIndex).addClass(opt.activeClass);
		}
		function switchSlide() {
			if(opt.waitAnimation) animating = true;
			var animProporties = prepareEffect(slides.eq(currentIndex), effectIndex);
			
			slides.removeClass(opt.activeClass).eq(currentIndex).addClass(opt.activeClass).animate(animProporties,{duration:opt.animSpeed, queue:false, easing:opt.easing, complete:function(){
				if(effectIndex < effectsCount-1) effectIndex++;
				else effectIndex = 0;
				slides.eq(oldIndex).css({left:slideWidth});
				animating = false;
			}});
			refreshStatus();
			autoSlide();
		}
		function autoSlide() {
			if(!opt.autoSlide) return;
			if(timer) clearTimeout(timer);
			timer = setTimeout(nextSlide,opt.switchTime);
		}
		refreshStatus();
		autoSlide();
	});
}

// clear inputs module
function clearFormFields(o) {
	if (o.clearInputs == null) o.clearInputs = true;
	if (o.clearTextareas == null) o.clearTextareas = true;
	if (o.passwordFieldText == null) o.passwordFieldText = false;
	if (o.addClassFocus == null) o.addClassFocus = false;
	if (!o.filterClass) o.filterClass = "default";
	if(o.clearInputs) {
		var inputs = document.getElementsByTagName("input");
		for (var i = 0; i < inputs.length; i++ ) {
			if((inputs[i].type == "text" || inputs[i].type == "password") && inputs[i].className.indexOf(o.filterClass) == -1) {
				inputs[i].valueHtml = inputs[i].value;
				inputs[i].onfocus = function ()	{
					if(this.valueHtml == this.value) this.value = "";
					if(this.fake) {
						inputsSwap(this, this.previousSibling);
						this.previousSibling.focus();
					}
					if(o.addClassFocus && !this.fake) {
						this.className += " " + o.addClassFocus;
						this.parentNode.className += " parent-" + o.addClassFocus;
					}
				}
				inputs[i].onblur = function () {
					if(this.value == "") {
						this.value = this.valueHtml;
						if(o.passwordFieldText && this.type == "password") inputsSwap(this, this.nextSibling);
					}
					if(o.addClassFocus) {
						this.className = this.className.replace(o.addClassFocus, "");
						this.parentNode.className = this.parentNode.className.replace("parent-"+o.addClassFocus, "");
					}
				}
				if(o.passwordFieldText && inputs[i].type == "password") {
					var fakeInput = document.createElement("input");
					fakeInput.type = "text";
					fakeInput.value = inputs[i].value;
					fakeInput.className = inputs[i].className;
					fakeInput.fake = true;
					inputs[i].parentNode.insertBefore(fakeInput, inputs[i].nextSibling);
					inputsSwap(inputs[i], null);
				}
			}
		}
	}
	if(o.clearTextareas) {
		var textareas = document.getElementsByTagName("textarea");
		for(var i=0; i<textareas.length; i++) {
			if(textareas[i].className.indexOf(o.filterClass) == -1) {
				textareas[i].valueHtml = textareas[i].value;
				textareas[i].onfocus = function() {
					if(this.value == this.valueHtml) this.value = "";
					if(o.addClassFocus) {
						this.className += " " + o.addClassFocus;
						this.parentNode.className += " parent-" + o.addClassFocus;
					}
				}
				textareas[i].onblur = function() {
					if(this.value == "") this.value = this.valueHtml;
					if(o.addClassFocus) {
						this.className = this.className.replace(o.addClassFocus, "");
						this.parentNode.className = this.parentNode.className.replace("parent-"+o.addClassFocus, "");
					}
				}
			}
		}
	}
	function inputsSwap(el, el2) {
		if(el) el.style.display = "none";
		if(el2) el2.style.display = "inline";
	}
}

// autoscaling module
function initAutoScalingNav(o) {
	if (!o.menuId) o.menuId = "nav";
	if (!o.tag) o.tag = "a";
	if (!o.spacing) o.spacing = 0;
	if (!o.constant) o.constant = 0;
	if (!o.minPaddings) o.minPaddings = 0;
	if (!o.liHovering) o.liHovering = false;
	if (!o.sideClasses) o.sideClasses = false;
	if (!o.equalLinks) o.equalLinks = false;
	if (!o.flexible) o.flexible = false;
	var nav = document.getElementById(o.menuId);
	if(nav) {
		nav.className += " scaling-active";
		var lis = nav.getElementsByTagName("li");
		var asFl = [];
		var lisFl = [];
		var width = 0;
		for (var i=0, j=0; i<lis.length; i++) {
			if(lis[i].parentNode == nav) {
				var t = lis[i].getElementsByTagName(o.tag).item(0);
				asFl.push(t);
				asFl[j++].width = t.offsetWidth;
				lisFl.push(lis[i]);
				if(width < t.offsetWidth) width = t.offsetWidth;
			}
			if(o.liHovering) {
				lis[i].onmouseover = function() {
					this.className += " hover";
				}
				lis[i].onmouseout = function() {
					this.className = this.className.replace("hover", "");
				}
			}
		}
		var menuWidth = nav.clientWidth - asFl.length*o.spacing - o.constant;
		if(o.equalLinks && width * asFl.length < menuWidth) {
			for (var i=0; i<asFl.length; i++) {
				asFl[i].width = width;
			}
		}
		width = getItemsWidth(asFl);
		if(width < menuWidth) {
			var version = navigator.userAgent.toLowerCase();
			for (var i=0; getItemsWidth(asFl) < menuWidth; i++) {
				asFl[i].width++;
				if(!o.flexible) {
					asFl[i].style.width = asFl[i].width + "px";
				}
				if(i >= asFl.length-1) i=-1;
			}
			if(o.flexible) {
				for (var i=0; i<asFl.length; i++) {
					width = (asFl[i].width - o.spacing - o.constant/asFl.length)/menuWidth*100;
					if(i != asFl.length-1) {
						lisFl[i].style.width = width + "%";
					}
					else {
						if(navigator.appName.indexOf("Microsoft Internet Explorer") == -1 || version.indexOf("msie 8") != -1 || version.indexOf("msie 9") != -1)
							lisFl[i].style.width = width + "%";
					}
				}
			}
		}
		else if(o.minPaddings > 0) {
			for (var i=0; i<asFl.length; i++) {
				asFl[i].style.paddingLeft = o.minPaddings + "px";
				asFl[i].style.paddingRight = o.minPaddings + "px";
			}
		}
		if(o.sideClasses) {
			lisFl[0].className += " first-child";
			lisFl[0].getElementsByTagName(o.tag).item(0).className += " first-child-a";
			lisFl[lisFl.length-1].className += " last-child";
			lisFl[lisFl.length-1].getElementsByTagName(o.tag).item(0).className += " last-child-a";
		}
		nav.className += " scaling-ready";
	}
	function getItemsWidth(a) {
		var w = 0;
		for(var q=0; q<a.length; q++) {
			w += a[q].width;
		}
		return w;
	}
}