$(function(){
	initNav({
		menuId: "main-nav",
		cleverMode: true,
		hoverClass: "hover",
		flexibility: true,
		sideClasses: true,
		menuPaddings: 30,
		minWidth: 100
	});
	clearFormFields({
		clearInputs: true,
		clearTextareas: true,
		passwordFieldText: true,
		addClassFocus: "focus",
		filterClass: "default"
	});
	$('div.gallery').slideshow();
})

//create jQuery plugin
$.fn.slideshow = function(options){return new slideshow(this, options);}

//constructor
function slideshow(obj, options){this.init(obj,options)}

//prototype
slideshow.prototype = {
	init:function(obj, options) {
		this.options = $.extend({
			slides:'div.gallery-holder > ul >li',
			nextBtn:'a.next',
			prevBtn:'a.prev',
			pagingHolder:'ul.switcher',
			pagingTag:'li',
			createPaging:true,
			autoPlay:true,
			dynamicLoad:false,
			imgAttr:'alt',
			effect:'slideX',//fade, slideX, slideY,
			startSlide:false,
			switchTime:5000,
			animSpeed:700
		},options);
		
		this.mainHolder = $(obj);
		this.slides = $(this.options.slides,this.mainHolder);		
		this.nextBtn = $(this.options.nextBtn,this.mainHolder);
		this.prevBtn = $(this.options.prevBtn,this.mainHolder);
		this.dynamicLoad = this.options.dynamicLoad;
		this.imgAttr = this.options.imgAttr;
		this.animSpeed = this.options.animSpeed;
		this.switchTime = this.options.switchTime;
		this.effect = this.options.effect;
		this.autoPlay = this.options.autoPlay;
		this.previous = -1;
		this.loadingFrame = 1;
		this.busy = false;
		this.direction = 1;
		this.timer;
		this.pagingArray = new Array;
		this.loadArray = new Array;
		this.preloader = new Array;
		this.slidesParent = this.slides.eq(0).parent();
		this.slideW = this.slidesParent.width();
		this.slideH = this.slidesParent.height();
		
		(function(){
			if (this.options.startSlide) this.current = this.options.startSlide
			else {
				var active = -1;
				for(var i = 0; i< this.slides.length-1; i++) {
					if (this.slides.eq(i).hasClass('active')) {
						active = i;
						break;						
					}
				}
				if (active != -1) this.current = active;
				else this.current = 0;
			}
		}).apply(this);
		
		this.initPaging();
		this.setStyles();
		this.bindEvents();
		this.showSlide();
	},
	
	initPaging:function(){
		var obj = this;
		this.pagingHolder = $(this.options.pagingHolder,this.mainHolder);
		
		if (this.options.createPaging) {
			this.pagingHolder.each(function(i){
				var _this = $(this);
				_this.empty();
				var list = $('<ul>');
				for (var i = 0; i < obj.slides.length; i++) $('<li><a href="#">' + (i + 1) + '</a></li>').appendTo(list);
				_this.append(list);
			});
		}
		
		this.paging = $(this.options.pagingTag, this.pagingHolder);
		var ratio = Math.ceil(this.paging.length / this.slides.length);
		for (var i = 0; i < ratio; i++) {
			this.pagingArray.push(this.paging.slice(i*this.slides.length, (i*this.slides.length)+this.slides.length));
		}
	},
	
	setStyles:function(){
		//loader
		if (this.dynamicLoad) {
			this.loader = $('<div class="loader">');
			this.loaderDiv = $('<div>').appendTo(this.loader)
			this.loader.append(this.loaderDiv).appendTo(this.slidesParent);
		}
		
		//slides
		if (this.effect == 'fade') {
			this.slides.css({display:'none'});
			this.slides.eq(this.current).css({display:'block'});
		} else if (this.effect == 'slideX'){
			this.slides.css({display: 'none',left:-this.slideW});
			this.slides.eq(this.current).css({display:'block',left:0});
		} else if (this.effect == 'slideY'){
			this.slides.css({display:'none',top:-this.slideH});
			this.slides.eq(this.current).css({display:'block',top:0});
		}
	},
	
	bindEvents:function(){
		var obj = this;
		this.nextBtn.bind('click',function(){
			if (!obj.busy) obj.nextSlide();
			return false;
		});
		
		this.prevBtn.bind('click',function(){
			if (!obj.busy) obj.prevSlide();
			return false;
		});
		
		for (var i = 0; i < this.pagingArray.length; i++) {
			this.pagingArray[i].each(function(i){
				$(this).bind('click',function(){
					if (i != obj.current && !obj.busy) {
						obj.previous = obj.current;
						obj.current = i;
						if (obj.previous > i) obj.direction = -1
						else obj.direction = 1;
						obj.showSlide();
					}
					return false;
				});
			});
		}
		
		if (this.dynamicLoad) this.loader.bind('click',function(){
			obj.abortLoading();
		});
	},
	
	nextSlide:function(){
		this.previous = this.current;
		if (this.current < this.slides.length-1) this.current++
		else this.current = 0;
		this.direction = 1;
		this.showSlide();
	},
	
	prevSlide:function(){
		this.previous = this.current;
		if (this.current > 0) this.current--
		else this.current = this.slides.length-1;
		this.direction = -1;
		this.showSlide();
	},
	
	showSlide:function(){
		var obj = this;
		
		if (this.previous == this.current) return; 
		
		var _current = this.current;
		this.busy = true;
		clearTimeout(this.timer);
		
		if (typeof this.loadArray[_current] != 'undefined' || !this.dynamicLoad) {
			//slide already loaded
			this.switchSlide();
		
		} else {
			//slide not loaded
			this.showLoading();
			var images = $(this.dynamicLoad,this.slides.eq(this.current));
			if (images.length) {
				var counter = 0;
				images.each(function(){
					var preloader = new Image;
					obj.preloader.push(preloader);
					var img = $(this);
					preloader.onload = function(){
						counter++;
						checkImages();
					}
					preloader.onerror = function(){
						//ignore errors
						counter++;
						checkImages();
					}
					preloader.src = img.attr(obj.imgAttr);
				});
				
				function checkImages(){
					if (counter == images.length) {
						images.each(function(){
							var img = $(this);
							img.attr('src',img.attr(obj.imgAttr));
						});
						successLoad();
					}
				}
				
			} else successLoad();
		}
		
		function successLoad(){
			obj.loadArray[_current] = 1;
			obj.hideLoading();
			obj.switchSlide();
		}
	},
	
	switchSlide:function(){
		var obj = this;
		
		if (this.previous != -1) {
			var nextSlide = this.slides.eq(this.current);
			var prevSlide = this.slides.eq(this.previous);
			
			if (this.effect == 'fade') {
				nextSlide.css({display:'block',opacity:0}).animate({opacity:1},this.animSpeed,function(){
					$(this).css({opacity:'auto'});
				});
				prevSlide.animate({opacity:0},this.animSpeed,callback);
			} else if (this.effect == 'slideX'){
				nextSlide.css({display:'block',left:this.slideW*this.direction}).animate({left:0},this.animSpeed);
				prevSlide.animate({left:-this.slideW*this.direction},this.animSpeed+10,callback);
			} else if (this.effect == 'slideY'){
				nextSlide.css({display:'block',top:this.slideH*this.direction}).animate({top:0},this.animSpeed);
				prevSlide.animate({top:-this.slideH*this.direction},this.animSpeed+10,callback);
			}
		} else {
			if (this.autoPlay) this.startAutoPlay();
			this.busy = false;
		}
		
		this.refreshStatus();
		
		function callback(){
			prevSlide.css({display:'none'});
			if (obj.autoPlay) obj.startAutoPlay();
			obj.busy = false;
		}
	},
	
	refreshStatus:function(){
		for (var i = 0; i < this.pagingArray.length;i++) {
			this.pagingArray[i].eq(this.previous).removeClass('active');
			this.pagingArray[i].eq(this.current).addClass('active');
		}
		this.slides.eq(this.previous).removeClass('active');
		this.slides.eq(this.current).addClass('active');
	},
	
	showLoading:function(){
		var obj = this;
		this.loader.show();
		clearInterval(this.loadingTimer);
		obj.loadingTimer = setInterval(animateLoading, 66);
		
		function animateLoading(){
			obj.loaderDiv.css('top', obj.loadingFrame * -40);
			obj.loadingFrame = (obj.loadingFrame + 1) % 12;
		}
	},
	
	hideLoading:function(){
		this.loader.hide();
		clearInterval(this.loadingTimer);
	},
	
	abortLoading:function(){
		this.busy = false;
		this.hideLoading();
		this.current = this.previous;
		for (var i = 0; i < this.preloader.length; i++) {
			this.preloader[i].onload = null;
			this.preloader[i].onerror = null;
		}
		if (this.autoPlay) this.startAutoPlay();
	},
	
	startAutoPlay:function(){
		var obj = this;
		clearTimeout(obj.timer);
		obj.timer = setTimeout(function(){
			obj.nextSlide();
		},obj.switchTime);
	}
}

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";
	}
}
	
function initNav(o)
{
	if (!o.menuId) o.menuId = "main-nav";
	if (!o.cleverMode) o.cleverMode = false;
	if (!o.flexibility) o.flexibility = false;
	if (!o.dropExistenceClass) o.dropExistenceClass = false;
	if (!o.hoverClass) o.hoverClass = "hover";
	if (!o.menuHardCodeClass) o.menuHardCodeClass = "menu-hard-code";
	if (!o.sideClasses) o.sideClasses = false;
	if (!o.center) o.center = false;
	if (!o.menuPaddings) o.menuPaddings = 0;
	if (!o.minWidth) o.minWidth = 0;
	if (!o.coeff) o.coeff = 1.7;
	var n = document.getElementById(o.menuId);
	if(n)
	{
		n.className = n.className.replace(o.menuHardCodeClass, "");
		var lfl = [];
		var li = n.getElementsByTagName("li");
		for (var i=0; i<li.length; i++)
		{
			li[i].className += (" " + o.hoverClass);
			var d = li[i].getElementsByTagName("div").item(0);
			if(d)
			{
				if(o.flexibility)
				{
					var a = d.getElementsByTagName("a");
					for (var j=0; j<a.length; j++)
					{
						var w = a[j].parentNode.parentNode.offsetWidth;
						if(w > 0)
						{
							if(typeof(o.minWidth) == "number" && w < o.minWidth)
								w = o.minWidth;
							else if(typeof(o.minWidth) == "string" && li[i].parentNode == n && w < li[i].offsetWidth)
								w = li[i].offsetWidth - 3;
							a[j].style.width = w - o.menuPaddings + "px";
						}
					}
					d.style.width = li[i].getElementsByTagName("div").item(1).clientWidth + "px";
				}
				var t = document.documentElement.clientWidth/o.coeff;
				if(li[i].parentNode != n && (!o.cleverMode || fPX(li[i]) < t))
				{
					d.style.right = "auto";
					d.style.left = li[i].parentNode.offsetWidth + "px";
					d.parentNode.className += " left-side";
				}	
				else if(li[i].parentNode != n && (o.cleverMode || fPX(li[i]) >= t))
				{
					d.style.left = "auto";
					d.style.right = li[i].parentNode.offsetWidth + "px";
					d.parentNode.className += " right-side";
				}
				else if(li[i].parentNode == n && o.cleverMode && fPX(li[i]) >= t)
				{
					li[i].className += " right-side";
				}
				if(li[i].parentNode == n && o.center)
					d.style.left = -li[i].getElementsByTagName("div").item(1).clientWidth/2 + li[i].clientWidth/2 + "px";
			}
			if(o.dropExistenceClass && li[i].getElementsByTagName("ul").length > 0)
			{
				li[i].className += (" " + o.dropExistenceClass);
				li[i].getElementsByTagName("a").item(0).className += (" " + o.dropExistenceClass + "-link");
				li[i].innerHTML += "<em class='pointer'></em>";
			}
			if(li[i].parentNode == n) lfl.push(li[i]);
		}
		if(o.sideClasses)
		{
			lfl[0].className += " first-child";
			lfl[0].getElementsByTagName("a").item(0).className += " first-child-link";
			lfl[lfl.length-1].className += " last-child";
			lfl[lfl.length-1].getElementsByTagName("a").item(0).className += " last-child-link";
		}
		for (var i=0; i<li.length; i++)
		{
			li[i].className = li[i].className.replace(o.hoverClass, "");
			li[i].onmouseover = function()
			{
				this.className += (" " + o.hoverClass);
			}
			li[i].onmouseout = function()
			{
				this.className = this.className.replace(o.hoverClass, "");
			}
		}
	}
	function fPX(a)
	{
		var b = 0;
		while (a.offsetParent) {b += a.offsetLeft; a = a.offsetParent;}
		return b;
	}
}
	
// browser detect script
browserDetect = {
	matchGroups: [
		[
			{uaString:'win', className:'win'},
			{uaString:'mac', className:'mac'},
			{uaString:['linux','x11'], className:'linux'}
		],
		[
			{uaString:'msie', className:'trident'},
			{uaString:'applewebkit', className:'webkit'},
			{uaString:'gecko', className:'gecko'},
			{uaString:'opera', className:'presto'}
		],
		[
			{uaString:'msie 9.0', className:'ie9'},
			{uaString:'msie 8.0', className:'ie8'},
			{uaString:'msie 7.0', className:'ie7'},
			{uaString:'msie 6.0', className:'ie6'},
			{uaString:'firefox/2', className:'ff2'},
			{uaString:'firefox/3', className:'ff3'},
			{uaString:'firefox/4', className:'ff4'},
			{uaString:['opera','version/11'], className:'opera11'},
			{uaString:['opera','version/10'], className:'opera10'},
			{uaString:'opera/9', className:'opera9'},
			{uaString:['safari','version/3'], className:'safari3'},
			{uaString:['safari','version/4'], className:'safari4'},
			{uaString:['safari','version/5'], className:'safari5'},
			{uaString:'chrome', className:'chrome'},
			{uaString:'safari', className:'safari2'},
			{uaString:'unknown', className:'unknown'}
		]
	],
	init: function() {
		this.detect();
		return this;
	},
	addClass: function(className) {
		this.pageHolder = document.documentElement;
		document.documentElement.className += ' '+className;
	},
	detect: function() {
		for(var i = 0, curGroup; i < this.matchGroups.length; i++) {
			curGroup = this.matchGroups[i];
			for(var j = 0, curItem; j < curGroup.length; j++) {
				curItem = curGroup[j];
				if(typeof curItem.uaString === 'string') {
					if(this.uaMatch(curItem.uaString)) {
						this.addClass(curItem.className);
						break;
					}
				} else {
					for(var k = 0, allMatch = true; k < curItem.uaString.length; k++) {
						if(!this.uaMatch(curItem.uaString[k])) {
							allMatch = false;
							break;
						}
					}
					if(allMatch) {
						this.addClass(curItem.className);
						break;
					}
				}
			}
		}
	},
	uaMatch: function(s) {
		if(!this.ua) {
			this.ua = navigator.userAgent.toLowerCase();
		}
		return this.ua.indexOf(s) != -1;
	}
}.init();