/**
 * @author Fedor Pudeyan
 * @title Flexitabs 1.1
 */
(function($){
	var Flexitabs = function(options){
		this.defaults = {
			//CSS-selectors of target elements in DOM for unobtrusive attaching
			containerSelector: '.flexitabs',
			tabSelector: '.tab_head a',
			contentSelector: '.tab_content',
			//CSS classes for indicate active and inactive tabs and contents of tabs
			activeLinkClass: 'active', //also class for marking initial active tab in your HTML
			inactiveLinkClass: 'inactive'
		}
		this.initialize = function(){
			var flexitabs_object = this;
			$(this.containerSelector).each(function(){
				var storage = {};
				storage.object = this;
				//finding tabs and it's contents in DOM
				storage.tabs = $.grep($(this).find(flexitabs_object.tabSelector), function(tab){
					if ($(tab).parents(flexitabs_object.containerSelector)[0] == storage.object) 
						return true;
				});
				storage.contents = $.grep($(this).find(flexitabs_object.contentSelector), function(tab){
					if ($(tab).parents(flexitabs_object.containerSelector)[0] == storage.object) 
						return true;
				});
				if (storage.tabs.length <= storage.contents.length) {//avoiding nonfunctional tabs
					var active = 0;
					var container = $(this);
					$(storage.tabs).each(function(i){
						//initializing storage for tabs and contents
						var tab_storage = {};
						var content_storage = {};
						tab_storage.object = content_storage.object = container;
						tab_storage.index = content_storage.index = i;
						//bind click handler to tabs
						$(this).click(function(){
							flexitabs_object.activate(this);
							return false;
						});
						//preselecting active tab from DOM
						if ($(this).hasClass(flexitabs_object.activeLinkClass)) 
							active = i;
						//storing data in jQuery data-storages, assigned to DOM-elements
						$(storage.tabs[i]).data('Flexitabs', tab_storage);
						$(storage.contents[i]).data('Flexitabs', content_storage);
					});
					storage.active = active;
					container.data('Flexitabs', storage); //storing whole tabulator data in container storage
					flexitabs_object.activate(storage.tabs[active]); //initial tab activation
				}
			});
		}
		this.activate = function(tab){
			var index = $(tab).data('Flexitabs').index;
			var storage = $(tab).data('Flexitabs').object;
			var tabs_storage = $(storage).data('Flexitabs').tabs;
			var contents_storage = $(storage).data('Flexitabs').contents;
			
			//deactivation of all tabs and contents
			$(tabs_storage)
				.removeClass(this.activeLinkClass)
				.addClass(this.inactiveLinkClass)
			
			$(contents_storage)
				.eq(index)
					.removeClass(this.inactiveLinkClass)
					.addClass(this.activeLinkClass)				
					.end()
				.not(':eq(' + index + ')')
					.removeClass(this.activeLinkClass)
					.addClass(this.inactiveLinkClass)

			//activation of current clicked tab
			$(tab)
				.removeClass(this.inactiveLinkClass)
				.addClass(this.activeLinkClass)
			
			storage.active = index
		}
		$.extend(this, this.defaults, options);
		this.initialize();
	};
	$(function(){
		new Flexitabs();
	})
})(jQuery);