/*!
 * tools.scrollable @VERSION - Scroll your HTML with eye candy.
 * 
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/scrollable.html
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : March 2008
 * Date: @DATE
 * Revision: @REVISION 
 */
 var findItems = 0;
 var totalItems = 0;
 var currentItem;
(function($) {
		
		
		
	// static constructs
	$.tools = $.tools || {version: {}};
	
	$.tools.version.scrollable = '@VERSION';
				
	var current = null;		

	
	function find(query, ctx) {
		
		return query.indexOf("#") != -1 ? $(query).eq(0) : ctx.siblings(query).eq(0);	
	}		
	
	// constructor
	function Scrollable(root, conf) {   

		// current instance
		var self = this;  
		if (!current) { current = self; }		
		
		// generic binding function
		function bind(name, fn) {
			$(self).bind(name, function(e, args)  {
				if (fn && fn.call(this, args.index) === false && args) {
					args.proceed = false;	
				}	
			});	 
			return self;
		}
		
		// bind all callbacks from configuration
		$.each(conf, function(name, fn) {
			
			if ($.isFunction(fn)) { bind(name, fn); }
		});   
		
		
		
		// horizontal flag
		var horizontal = !conf.vertical;				
		
		// wrap (root elements for items)
		var wrap = $(conf.items, root);				
		
		// current index
		var index = 0;			

		
		// get handle to navigational elements
		var prev = find(conf.prev, root);
		var next = find(conf.next, root);
		var prevPage = find(conf.prevPage, root);
		var nextPage = find(conf.nextPage, root);
		
		
		
		totalItems = $('#listItems').children().size()
		//JOSH JOSH JOSH JOSH
		//josh josh josh Josh Josh
		//JUST DIVIDE totalItems by 2
		//totalItems = totalItems/2;
		//OR
		/*
		Create an input box on each page
		<input type="hidden" id="checkScript" value="0">
		for the page it doesn't run 
		and 
		
		<input type="hidden" id="checkScript" value="1">
		if the script does run
		then right here add
		/*
		
		/*
		
		runScript = $('#checkScript').val();
		if(runScript =='1')
		{
		totalItems = totalItems/2;
		}
		
		*/
		
		$('#count').html('1 of '+totalItems);
		
		// when single entry 
		var forward;
		
		// methods
		$.extend(self, {
			
			getIndex: function() {
				return index;	
			},
	
			getConf: function() {
			
				return conf;	
			},
			
			getSize: function() {
			
		
				return self.getItems().size();	
			},
	
			getPageAmount: function() {
				return Math.ceil(this.getSize() / conf.size); 	
			},
			
			getPageIndex: function() {
				return Math.ceil(index / conf.size);	
			},

			getNaviButtons: function() {
				return prev.add(next).add(prevPage).add(nextPage);	
			},
			
			getRoot: function() {
				return root;	
			},
			
			getItemWrap: function() {
				return wrap;	
			},
			
			getItems: function() {
				return wrap.children();	
			},
			
			getVisibleItems: function() {
				return self.getItems().slice(index, index + conf.size);	
			},
			
			/* all seeking functions depend on this */		
			seekTo: function(i, time, fn) {
			
		
					currentItem = 1+ i;
					
				
				// default speed
				if (time === undefined) { time = conf.speed; }
				
				// function given as second argument
				if ($.isFunction(time)) {
					fn = time;
					time = conf.speed;
				} 
				
				if (i < 0) { i = 0; }				
				if (i > self.getSize() - conf.size) { return self; } 				

				var item = self.getItems().eq(i);					
				if (!item.length) { return self; }				
				
				
				// onBeforeSeek
				var p = {index: i, proceed: true};
				$(self).trigger("onBeforeSeek", p);				
				if (!p.proceed) { return self; }
									
				
				if (horizontal) {
 					var left = -item.position().left;					
					wrap.animate({left: left}, time, conf.easing, fn ? function() { fn.call(self); } : null);
					
				} else {
					var top = -item.position().top;										
					wrap.animate({top: top}, time, conf.easing, fn ? function() { fn.call(self); } : null);							
				}					

				
				// prev buttons disabled flag
				if (i === 0) {
					prev.add(prevPage).addClass(conf.disabledClass);					
				} else {
					prev.add(prevPage).removeClass(conf.disabledClass);
				}
								
				// next buttons disabled flag
				if (i >= self.getSize() - conf.size) {
					next.add(nextPage).addClass(conf.disabledClass);
				} else {
					next.add(nextPage).removeClass(conf.disabledClass);
				}				
				
				current = self;
				index = i;				
				
				// onSeek after index being updated
				$(self).trigger("onSeek", {index: i});	
				
					//var sheet = document.createElement('style')
				//	sheet.innerHTML = "ul#next-prev li a.prev-pager-arrow {background-position:-13px -24px;}";
				//	document.body.appendChild(sheet);
					if(currentItem<=1){
					$('#prev2').attr('class','prev-pager-arrow-begin')
					$('#prev1').attr('class','prev-pager-arrow-1-begin')
					}else{
					
					$('#prev2').attr('class','prev-pager-arrow')
					$('#prev1').attr('class','prev-pager-arrow-1')
					}
					
					if(currentItem==totalItems){
					$('#next2').attr('class','next-pager-arrow-end')
					$('#next1').attr('class','next-pager-arrow-1-end')
					}else{
					
					$('#next2').attr('class','next-pager-arrow')
					$('#next1').attr('class','next-pager-arrow-1')
					}
					
					
					if(currentItem<1){
					$('#count').html('1 of '+totalItems);
					}else{
					$('#count').html(currentItem+' of '+totalItems);
						}
						
						
					
										
				return self; 
			
			
			
			},			
			
				
			move: function(offset, time, fn) {
			
			
				
				return this.seekTo(index + offset, time, fn);
			},
			
			next: function(time, fn) {
				return this.move(1, time, fn);	
			},
			
			prev: function(time, fn) {
				
				return this.move(-1, time, fn);	
			},
			
			movePage: function(offset, time, fn) {
			
				var steps = conf.size * offset;
				
				var i = index % conf.size;
				if (i > 0) {
				 	steps += (offset > 0 ? -i : conf.size - i);
				}
				
				return this.move(steps, time, fn);		
			},
			
			prevPage: function(time, fn) {
				return this.movePage(-1, time, fn);
			},  
	
			nextPage: function(time, fn) {
				
				return this.movePage(1, time, fn);
			},			
			
			setPage: function(page, time, fn) { 
				page -= this.getPageIndex();
				return this.movePage(page);
			},			
			
			begin: function(time, fn) {
				return this.seekTo(0, time, fn);	
			},
			
			end: function(time, fn) {
				
				return this.seekTo(this.getSize() - conf.size, time, fn);	
			},
			
			reload: function() {				
				return $(self).trigger("onReload", {});
			},

			// callback functions
			onBeforeSeek: function(fn) {
				return bind("onBeforeSeek", fn); 		
			},
			
			onSeek: function(fn) {
				return bind("onSeek", fn); 		
			},
			
			onReload: function(fn) {
				return bind("onReload", fn); 		
			},
			
			click: function(i) {
			
				var item = self.getItems().eq(i);
				var klass = conf.activeClass;			
				
				// check that i is sane
				if (i < 0 || i >= self.getSize()) { return self; }
				
				// size == 1							
				if (size == 1) {
					if (i == 0 || i == self.getSize() -1)  { 
						forward = (forward === undefined) ? true : !forward;	 
					}
					return forward ? self.next() : self.prev(); 
				} 
				
				// size == 2
				if (size == 2) {
					if (i == index) { i--; }
					self.getItems().removeClass(klass);
					item.addClass(klass);					
					return self.seekTo(i, time, fn);
				}				
		
				if (!item.hasClass(klass)) {				
					self.getItems().removeClass(klass);
					item.addClass(klass);
					var delta = Math.floor(size / 2);
					var to = i - delta;
		
					// next to last item must work
					if (to > self.getSize() - size) { 
						to = self.getSize() - size; 
					}
		
					if (to !== i) {
						return self.seekTo(to);		
					}
				}
				
				return self;
			}   
			
		});
			
		// prev button		
		prev.addClass(conf.disabledClass).click(function() { 
			self.prev(); 
		});
		

		// next button
		next.click(function() { 
			
			self.next(); 
			
		});
		
		// prev page button
		nextPage.click(function() { 
		
			self.nextPage(); 
		});
		

		// next page button
		prevPage.addClass(conf.disabledClass).click(function() { 
			self.prevPage(); 
		});		

		
		// keyboard
		if (conf.keyboard) {			

			// keyboard works on one instance at the time. thus we need to unbind first
			$(document).unbind("keydown.scrollable").bind("keydown.scrollable", function(evt) {
				
				var el = current;	
				if (!el || evt.altKey || evt.ctrlKey) { return; }
					
				if (horizontal && (evt.keyCode == 37 || evt.keyCode == 39)) {					
					el.move(evt.keyCode == 37 ? -1 : 1);
					return evt.preventDefault();
				}	
				
				if (!horizontal && (evt.keyCode == 38 || evt.keyCode == 40)) {
					el.move(evt.keyCode == 38 ? -1 : 1);
					return evt.preventDefault();
				}
				
				return true;
				
			});	 
		}
		
		// hover
		var hc = conf.hoverClass; 
		if (hc || conf.clickable) {
			
			self.onReload(function() { 

				// hovering
				if (hc) {
					self.getItems().hover(function()  {
						$(this).addClass(hc);		
					}, function() {
						$(this).removeClass(hc);	
					});						
				}
				
				// clickable
				if (conf.clickable) {
					self.getItems().each(function(i) {
						$(this).unbind("click.scrollable").bind("click.scrollable", function() {
							self.click(i);		
						});
					});
				}

			});
			
			self.reload();
		}
		
	} 

		
	// jQuery plugin implementation
	$.fn.scrollable = function(conf) { 
			
		// already constructed --> return API
		var el = this.eq(typeof conf == 'number' ? conf : 0).data("scrollable");
		if (el) { return el; }		
		
 
		var opts = {
			
			// basics
			size: 5,
			vertical:false,
			speed: 400,
			keyboard: true,			
			
			// other
			disabledClass: 'disabled',
			hoverClass: null,		
			clickable: true,
			activeClass: 'active', 
			easing: 'swing',
			
			// navigational elements
			items: '.items',
			prev: '.prev',
			next: '.next',
			prevPage: '.prevPage',
			nextPage: '.nextPage',
			api:false,

			
			// callbacks
			onBeforeSeek: null,
			onSeek: null 
		}; 
		
		
		$.extend(opts, conf);		
		
		this.each(function() {			
			el = new Scrollable($(this), opts);
			$(this).data("scrollable", el);	
		});
		
		return opts.api ? el: this; 
		
	};
			
	
})(jQuery);