//page init
$(function(){
	initNavFix();
	initGallery();
});

// init gallery
function initGallery(){
	$('.gallery').scrollGallery({
		autoRotation:true,
		switchTime:8000,
		duration:650
	});
}


// init nav fix
function initNavFix() {
	new touchNav({
		navBlock: 'nav'
	});
}

// scrolling gallery plugin
jQuery.fn.scrollGallery = function(_options){
	var _options = jQuery.extend({
		sliderHolder: '>div',
		slider:'>ul',
		slides: '>li',
		pagerLinks:'div.pager a',
		btnPrev:'.left',
		btnNext:'.right',
		activeClass:'active',
		disabledClass:'disabled',
		generatePagination:'div.pg-holder',
		curNum:'em.scur-num',
		allNum:'em.sall-num',
		circleSlide:true,
		pauseClass:'gallery-paused',
		pauseButton:'none',
		pauseOnHover:true,
		autoRotation:false,
		stopAfterClick:false,
		switchTime:5000,
		duration:650,
		easing:'swing',
		event:'click',
		splitCount:false,
		afterInit:false,
		vertical:false,
		step:false
	},_options);

	return this.each(function(){
		// gallery options
		var _this = jQuery(this);
		var _sliderHolder = jQuery(_options.sliderHolder, _this);
		var _slider = jQuery(_options.slider, _sliderHolder);
		var _slides = jQuery(_options.slides, _slider);
		var _btnPrev = jQuery(_options.btnPrev, _this);
		var _btnNext = jQuery(_options.btnNext, _this);
		var _pagerLinks = jQuery(_options.pagerLinks, _this);
		var _generatePagination = jQuery(_options.generatePagination, _this);
		var _curNum = jQuery(_options.curNum, _this);
		var _allNum = jQuery(_options.allNum, _this);
		var _pauseButton = jQuery(_options.pauseButton, _this);
		var _pauseOnHover = _options.pauseOnHover;
		var _pauseClass = _options.pauseClass;
		var _autoRotation = _options.autoRotation;
		var _activeClass = _options.activeClass;
		var _disabledClass = _options.disabledClass;
		var _easing = _options.easing;
		var _duration = _options.duration;
		var _switchTime = _options.switchTime;
		var _controlEvent = _options.event;
		var _step = _options.step;
		var _vertical = _options.vertical;
		var _circleSlide = _options.circleSlide;
		var _stopAfterClick = _options.stopAfterClick;
		var _afterInit = _options.afterInit;
		var _splitCount = _options.splitCount;

		// gallery init
		if(!_slides.length) return;

		if(_splitCount) {
			var curStep = 0;
			var newSlide = $('<slide>').addClass('split-slide');
			_slides.each(function(){
				newSlide.append(this);
				curStep++;
				if(curStep > _splitCount-1) {
					curStep = 0;
					_slider.append(newSlide);
					newSlide = $('<slide>').addClass('split-slide');
				}
			});
			if(curStep) _slider.append(newSlide);
			_slides = _slider.children();
		}

		var _currentStep = 0;
		var _sumWidth = 0;
		var _sumHeight = 0;
		var _hover = false;
		var _stepWidth;
		var _stepHeight;
		var _stepCount;
		var _offset;
		var _timer;

		_slides.each(function(){
			_sumWidth+=$(this).outerWidth(true);
			_sumHeight+=$(this).outerHeight(true);
		});

		// calculate gallery offset
		function recalcOffsets() {
			if(_vertical) {
				if(_step) {
					_stepHeight = _slides.eq(_currentStep).outerHeight(true);
					_stepCount = Math.ceil((_sumHeight-_sliderHolder.height())/_stepHeight)+1;
					_offset = -_stepHeight*_currentStep;
				} else {
					_stepHeight = _sliderHolder.height();
					_stepCount = Math.ceil(_sumHeight/_stepHeight);
					_offset = -_stepHeight*_currentStep;
					if(_offset < _stepHeight-_sumHeight) _offset = _stepHeight-_sumHeight;
				}
			} else {
				if(_step) {
					_stepWidth = _slides.eq(_currentStep).outerWidth(true)*_step;
					_stepCount = Math.ceil((_sumWidth-_sliderHolder.width())/_stepWidth)+1;
					_offset = -_stepWidth*_currentStep;
					if(_offset < _sliderHolder.width()-_sumWidth) _offset = _sliderHolder.width()-_sumWidth;
				} else {
					_stepWidth = _sliderHolder.width();
					_stepCount = Math.ceil(_sumWidth/_stepWidth);
					_offset = -_stepWidth*_currentStep;
					if(_offset < _stepWidth-_sumWidth) _offset = _stepWidth-_sumWidth;
				}
			}
		}

		// gallery control
		if(_btnPrev.length) {
			_btnPrev.bind(_controlEvent,function(){
				if(_stopAfterClick) stopAutoSlide();
				prevSlide();
				return false;
			});
		}
		if(_btnNext.length) {
			_btnNext.bind(_controlEvent,function(){
				if(_stopAfterClick) stopAutoSlide();
				nextSlide();
				return false;
			});
		}
		if(_generatePagination.length) {
			_generatePagination.empty();
			recalcOffsets();
			var _list = $('<ul />');
			for(var i=0; i<_stepCount; i++) $('<li><a href="#">'+(i+1)+'</a></li>').appendTo(_list);
			_list.appendTo(_generatePagination);
			_pagerLinks = _list.children();
		}
		if(_pagerLinks.length) {
			_pagerLinks.each(function(_ind){
				jQuery(this).bind(_controlEvent,function(){
					if(_currentStep != _ind) {
						if(_stopAfterClick) stopAutoSlide();
						_currentStep = _ind;
						switchSlide();
					}
					return false;
				});
			});
		}

		// gallery animation
		function prevSlide() {
			recalcOffsets();
			if(_currentStep > 0) _currentStep--;
			else if(_circleSlide) _currentStep = _stepCount-1;
			switchSlide();
		}
		function nextSlide() {
			recalcOffsets();
			if(_currentStep < _stepCount-1) _currentStep++;
			else if(_circleSlide) _currentStep = 0;
			switchSlide();
		}
		function refreshStatus() {
			if(_pagerLinks.length) _pagerLinks.removeClass(_activeClass).eq(_currentStep).addClass(_activeClass);
			if(!_circleSlide) {
				_btnPrev.removeClass(_disabledClass);
				_btnNext.removeClass(_disabledClass);
				if(_currentStep == 0) _btnPrev.addClass(_disabledClass);
				if(_currentStep == _stepCount-1) _btnNext.addClass(_disabledClass);
			}
			if(_curNum.length) _curNum.text(_currentStep+1);
			if(_allNum.length) _allNum.text(_stepCount);
		}
		function switchSlide() {
			recalcOffsets();
			if(_vertical) _slider.animate({marginTop:_offset},{duration:_duration,queue:false,easing:_easing});
			else _slider.animate({marginLeft:_offset},{duration:_duration,queue:false,easing:_easing});
			refreshStatus();
			autoSlide();
		}

		// autoslide function
		function stopAutoSlide() {
			if(_timer) clearTimeout(_timer);
			_autoRotation = false;
		}
		function autoSlide() {
			if(!_autoRotation || _hover) return;
			if(_timer) clearTimeout(_timer);
			_timer = setTimeout(nextSlide,_switchTime+_duration);
		}
		if(_pauseOnHover) {
			_this.hover(function(){
				_hover = true;
				if(_timer) clearTimeout(_timer);
			},function(){
				_hover = false;
				autoSlide();
			});
		}
		recalcOffsets();
		refreshStatus();
		autoSlide();

		// pause buttton
		if(_pauseButton.length) {
			_pauseButton.click(function(){
				if(_this.hasClass(_pauseClass)) {
					_this.removeClass(_pauseClass);
					_autoRotation = true;
					autoSlide();
				} else {
					_this.addClass(_pauseClass);
					stopAutoSlide();
				}
				return false;
			});
		}

		if(_afterInit && typeof _afterInit === 'function') _afterInit(_this, _slides);
	});
}


// navigation accesibility module
function touchNav(options) {
	this.options = {
		mobileReg: /(ipad|iphone|ipod|android|blackberry|iemobile)/gi,
		hoverClass: 'hover',
		followLink: false,
		menuItems: 'li',
		menuOpener: 'a',
		menuDrop: 'div',
		navBlock: null
	}
	for(var p in options) {
		this.options[p] = options[p];
	}
	this.init();
}
touchNav.prototype = {
	init: function() {
		this.isMobile = (this.options.mobileReg).test(navigator.userAgent);
		if(typeof this.options.navBlock === 'string') {
			this.menu = document.getElementById(this.options.navBlock);
		} else if(typeof this.options.navBlock === 'object') {
			this.menu = this.options.navBlock;
		}
		if(this.menu) {
			this.getElements();
			this.addEvents();
		}
	},
	getElements: function() {
		this.menuItems = this.menu.getElementsByTagName(this.options.menuItems);
	},
	hideActiveDropdown: function() {
		if(this.activeParent) {
			for(var i = 0; i < this.menuItems.length; i++) {
				this.removeClass(this.menuItems[i], this.options.hoverClass);
			}
			this.activeParent = null;
		}
	},
	getOpener: function(obj) {
		for(var i = 0; i < obj.childNodes.length; i++) {
			if(obj.childNodes[i].tagName && obj.childNodes[i].tagName.toLowerCase() == this.options.menuOpener.toLowerCase()) {
				return obj.childNodes[i];
			}
		}
		return false;
	},
	getDrop: function(obj) {
		for(var i = 0; i < obj.childNodes.length; i++) {
			if(obj.childNodes[i].tagName && obj.childNodes[i].tagName.toLowerCase() == this.options.menuDrop.toLowerCase()) {
				return obj.childNodes[i];
			}
		}
		return false;
	},
	addEvents: function() {
		// mobile event handlers
		if(this.isMobile) {
			for(var i = 0; i < this.menuItems.length; i++) {
				this.menuItems[i].touchNav = this;
				if(this.getDrop(this.menuItems[i])) {
					this.addHandler(this.getOpener(this.menuItems[i]), 'click', this.bind(this.clickHandler,this.menuItems[i]));
				}
			}
			this.addHandler(document.body, 'click', this.bind(this.outsideHandler, this));
			this.addHandler(document.body, 'touchstart', this.bind(this.outsideHandler, this));
		}
		// desktop event handlers
		else {
			for(var i = 0; i < this.menuItems.length; i++) {
				this.menuItems[i].touchNav = this;
				this.addHandler(this.menuItems[i], 'mouseover', this.mouseoverHandler);
				this.addHandler(this.menuItems[i], 'mouseout', this.mouseoutHandler);
			}
		}
	},
	outsideHandler: function(e) {
		var childFlag = false;
		if(this.activeParent) {
			this.outsideTarget = e.target || e.currentTarget || e.srcElement;
			while (this.outsideTarget.parentNode) {
				if(this.activeParent == this.outsideTarget) {
					childFlag = true;
					break;
				}
				this.outsideTarget = this.outsideTarget.parentNode;
			}
			if(!childFlag) {
				this.hideActiveDropdown();
			}
		}
	},
	mouseoverHandler: function() {
		this.touchNav.addClass(this, this.touchNav.options.hoverClass);
	},
	mouseoutHandler: function() {
		this.touchNav.removeClass(this, this.touchNav.options.hoverClass);
	},
	clickHandler: function(e) {
		// get current dropdown
		var tNav = this.touchNav;
		tNav.currentElement = e.currentTarget || e.srcElement;
		tNav.currentParent = tNav.currentElement.parentNode;

		// hide previous drop (if exists)
		if(tNav.activeParent && !tNav.isParent(tNav.activeParent, tNav.currentParent) && tNav.currentParent != tNav.activeParent) {
			tNav.hideActiveDropdown();
		}

		// handle current drop
		if(tNav.hasClass(tNav.currentParent, tNav.options.hoverClass)) {
			tNav.removeClass(tNav.currentParent, tNav.options.hoverClass);
			if(tNav.options.followLink) {
				window.location.href = tNav.currentElement.href;
			}
		} else {
			tNav.addClass(tNav.currentParent, tNav.options.hoverClass);
			tNav.activeParent = tNav.currentParent;
			return tNav.preventEvent(e);
		}
	},
	preventEvent: function(e) {
		if(!e) e = window.event;
		if(e.preventDefault) e.preventDefault();
		if(e.stopPropagation) e.stopPropagation();
		e.cancelBubble = true;
		return false;
	},
	isParent: function(parent, child) {
		while(child.parentNode) {
			if(child.parentNode == parent) {
				return true;
			}
			child = child.parentNode;
		}
		return false;
	},
	addHandler: function(object, event, handler) {
		if (typeof object.addEventListener != 'undefined') object.addEventListener(event, this.bind(handler,object), false);
		else if (typeof object.attachEvent != 'undefined') object.attachEvent('on' + event, this.bind(handler,object));
	},
	removeHandler: function(object, event, handler) {
		if (typeof object.removeEventListener != 'undefined') object.removeEventListener(event, handler, false);
		else if (typeof object.detachEvent != 'undefined') object.detachEvent('on' + event, handler);
	},
	hasClass: function(obj,cname) {
		return (obj.className ? obj.className.match(new RegExp('(\\s|^)'+cname+'(\\s|$)')) : false);
	},
	addClass: function(obj,cname) {
		if (!this.hasClass(obj,cname)) obj.className += " "+cname;
	},
	removeClass: function(obj,cname) {
		if (this.hasClass(obj,cname)) obj.className=obj.className.replace(new RegExp('(\\s|^)'+cname+'(\\s|$)'),' ');
	},
	bind: function(func, scope){
		return function() {
			return func.apply(scope, arguments);
		}
	}
}