// page init
$(function(){
	initInputs();
	initScrollGallery();
});

// init scroll gallery
function initScrollGallery(){
	$('.gallery').scrollGallery({
		sliderHolder: '.frame',
		btnPrev:'a.prev',
		btnNext:'a.next',
		generatePagination:'.switcher'
	});
	$('.carousel').scrollGallery({
		sliderHolder: '.frame',
		btnPrev:'a.prev',
		btnNext:'a.next',
		generatePagination:'.switcher'
	});
}

// scrolling gallery plugin
jQuery.fn.scrollGallery = function(_options){
	var _options = jQuery.extend({
		sliderHolder: '>div',
		slider:'>ul',
		slides: '>li',
		pagerLinks:'div.pager a',
		btnPrev:'a.link-prev',
		btnNext:'a.link-next',
		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;
			});
		}
		jQuery(window).focus(function(){
			autoSlide();
		}).blur(function(){
			clearTimeout(_timer);
		});

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

// clear inputs on focus
function initInputs() {
	// replace options
	var opt = {
		clearInputs: true,
		clearTextareas: true,
		clearPasswords: true
	}
	// collect all items
	var inputs = [].concat(
		PlaceholderInput.convertToArray(document.getElementsByTagName('input')),
		PlaceholderInput.convertToArray(document.getElementsByTagName('textarea'))
	);
	// apply placeholder class on inputs
	for(var i = 0; i < inputs.length; i++) {
		if(inputs[i].className.indexOf('default') < 0) {
			var inputType = PlaceholderInput.getInputType(inputs[i]);
			if((opt.clearInputs && inputType === 'text') ||
				(opt.clearTextareas && inputType === 'textarea') || 
				(opt.clearPasswords && inputType === 'password')
			) {
				new PlaceholderInput({
					element:inputs[i],
					wrapWithElement:false,
					showUntilTyping:false,
					getParentByClass:false,
					placeholderAttr:'value'
				});
			}
		}
	}
}

// input type placeholder class
;(function(){
	PlaceholderInput = function() {
		this.options = {
			element:null,
			showUntilTyping:false,
			wrapWithElement:false,
			getParentByClass:false,
			placeholderAttr:'value',
			inputFocusClass:'focus',
			inputActiveClass:'text-active',
			parentFocusClass:'parent-focus',
			parentActiveClass:'parent-active',
			labelFocusClass:'label-focus',
			labelActiveClass:'label-active',
			fakeElementClass:'input-placeholder-text'
		}
		this.init.apply(this,arguments);
	}
	PlaceholderInput.convertToArray = function(collection) {
		var arr = [];
		for (var i = 0, ref = arr.length = collection.length; i < ref; i++) {
		 arr[i] = collection[i];
		}
		return arr;
	}
	PlaceholderInput.getInputType = function(input) {
		return (input.type ? input.type : input.tagName).toLowerCase();
	}
	PlaceholderInput.prototype = {
		init: function(opt) {
			this.setOptions(opt);
			if(this.element && this.element.PlaceholderInst) {
				this.element.PlaceholderInst.refreshClasses();
			} else {
				this.element.PlaceholderInst = this;
				if(this.elementType == 'text' || this.elementType == 'password' || this.elementType == 'textarea') {
					this.initElements();
					this.attachEvents();
					this.refreshClasses();
				}
			}
		},
		setOptions: function(opt) {
			for(var p in opt) {
				if(opt.hasOwnProperty(p)) {
					this.options[p] = opt[p];
				}
			}
			if(this.options.element) {
				this.element = this.options.element;
				this.elementType = PlaceholderInput.getInputType(this.element);
				this.wrapWithElement = (this.elementType === 'password' || this.options.showUntilTyping ? true : this.options.wrapWithElement);
				this.setOrigValue( this.options.placeholderAttr == 'value' ? this.element.defaultValue : this.element.getAttribute(this.options.placeholderAttr) );
			}
		},
		setOrigValue: function(value) {
			this.origValue = value;
		},
		initElements: function() {
			// create fake element if needed
			if(this.wrapWithElement) {
				this.element.value = '';
				this.element.removeAttribute(this.options.placeholderAttr);
				this.fakeElement = document.createElement('span');
				this.fakeElement.className = this.options.fakeElementClass;
				this.fakeElement.innerHTML += this.origValue;
				this.fakeElement.style.color = getStyle(this.element, 'color');
				this.fakeElement.style.position = 'absolute';
				this.element.parentNode.insertBefore(this.fakeElement, this.element);
			}
			// get input label
			if(this.element.id) {
				this.labels = document.getElementsByTagName('label');
				for(var i = 0; i < this.labels.length; i++) {
					if(this.labels[i].htmlFor === this.element.id) {
						this.labelFor = this.labels[i];
						break;
					}
				}
			}
			// get parent node (or parentNode by className)
			this.elementParent = this.element.parentNode;
			if(typeof this.options.parentByClass === 'string') {
				var el = this.element;
				while(el.parentNode) {
					if(hasClass(el.parentNode, this.options.parentByClass)) {
						this.elementParent = el.parentNode;
						break;
					} else {
						el = el.parentNode;
					}
				}
			}
		},
		attachEvents: function() {
			this.element.onfocus = bindScope(this.focusHandler, this);
			this.element.onblur = bindScope(this.blurHandler, this);
			if(this.options.showUntilTyping) {
				this.element.onkeydown = bindScope(this.typingHandler, this);
				this.element.onpaste = bindScope(this.typingHandler, this);
			}
			if(this.wrapWithElement) this.fakeElement.onclick = bindScope(this.focusSetter, this);
		},
		togglePlaceholderText: function(state) {
			if(this.wrapWithElement) {
				this.fakeElement.style.display = state ? '' : 'none';
			} else {
				this.element.value = state ? this.origValue : '';
			}
		},
		focusSetter: function() {
			this.element.focus();
		},
		focusHandler: function() {
			this.focused = true;
			if(!this.element.value.length || this.element.value === this.origValue) {
				if(!this.options.showUntilTyping) {
					this.togglePlaceholderText(false);
				}
			}
			this.refreshClasses();
		},
		blurHandler: function() {
			this.focused = false;
			if(!this.element.value.length || this.element.value === this.origValue) {
				this.togglePlaceholderText(true);
			}
			this.refreshClasses();
		},
		typingHandler: function() {
			setTimeout(bindScope(function(){
				if(this.element.value.length) {
					this.togglePlaceholderText(false);
					this.refreshClasses();
				}
			},this), 10);
		},
		refreshClasses: function() {
			this.textActive = this.focused || (this.element.value.length && this.element.value !== this.origValue);
			this.setStateClass(this.element, this.options.inputFocusClass,this.focused);
			this.setStateClass(this.elementParent, this.options.parentFocusClass,this.focused);
			this.setStateClass(this.labelFor, this.options.labelFocusClass,this.focused);
			this.setStateClass(this.element, this.options.inputActiveClass, this.textActive);
			this.setStateClass(this.elementParent, this.options.parentActiveClass, this.textActive);
			this.setStateClass(this.labelFor, this.options.labelActiveClass, this.textActive);
		},
		setStateClass: function(el,cls,state) {
			if(!el) return; else if(state) addClass(el,cls); else removeClass(el,cls);
		}
	}
	
	// utility functions
	function hasClass(el,cls) {
		return el.className ? el.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)')) : false;
	}
	function addClass(el,cls) {
		if (!hasClass(el,cls)) el.className += " "+cls;
	}
	function removeClass(el,cls) {
		if (hasClass(el,cls)) {el.className=el.className.replace(new RegExp('(\\s|^)'+cls+'(\\s|$)'),' ');}
	}
	function bindScope(f, scope) {
		return function() {return f.apply(scope, arguments)}
	}
	function getStyle(el, prop) {
		if (document.defaultView && document.defaultView.getComputedStyle) {
			return document.defaultView.getComputedStyle(el, null)[prop];
		} else if (el.currentStyle) {
			return el.currentStyle[prop];
		} else {
			return el.style[prop];
		}
	}
}());