/*
 * jQuery Timetabs v1
 * http://www.tn34.de
 *
 * Copyright 2010, TN34.DE
 * Released under the GPL license.
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * Date: Tue Aug 17 12:19:511 2010
 */

(function(jQuery){
	
	jQuery.fn.timetabs = function(options) {
		
		var opt = jQuery.extend({}, jQuery.timetabs.defaults, options);

		// main function
		return this.each(function() {
			
			var gDLIndex = jQuery.timetabs.gDLI.length++;
			
			var delayedStartInterval = null;
			
			var continueFlag = false;
			
			// create object
			jQuery.timetabs.gDLI[gDLIndex] = {
				selfObj: jQuery(this),
				self: this,
				t: '',
				c: '',
				cIndex: 0,
				stTime: 0,
				timeOut: 0,
				timeLeft: 0
			}
			
			// children elements
			jQuery.timetabs.gDLI[gDLIndex].t = gDLI().selfObj.children('dt');
			jQuery.timetabs.gDLI[gDLIndex].c = gDLI().selfObj.children('dd');
			
			// check if dt.length and dd.length is equal
			if(gDLI().t.length !== gDLI().c.length) return;
			
			// validate defaultIndex
			jQuery.timetabs.gDLI[gDLIndex].cIndex = ((opt.defaultIndex+1) > gDLI().t.length || opt.defaultIndex < 0) ? 0 : opt.defaultIndex;
			
			if(opt.animated !== false) {
				gDLI().selfObj.find('dd:gt('+gDLI().cIndex+')').hide();
			}
			
			// activate defaultIndex
			_setActiveTab(gDLI().cIndex);
			
			jQuery(gDLI().t).click(function(e) {
				_setActiveTab(this, e);
				e.stopPropagation();
			});
			
			
			if((isNaN(opt.interval)) !== true || parseInt(opt.interval) > 0) {
				jQuery(gDLI().t).mouseover(_pause).mouseenter(_pause).mouseleave(_unpause);
				jQuery(gDLI().c).mouseover(_pause).mouseenter(_pause).mouseleave(_unpause);
			}
			
			function _startInterval() {
				clearTimeout(jQuery.timetabs.gDLI[gDLIndex].timeOut);
				if(delayedStartInterval) clearTimeout(delayedStartInterval);
				
				jQuery.timetabs.gDLI[gDLIndex].stTime = new Date().valueOf();
				jQuery.timetabs.gDLI[gDLIndex].timeOut = setTimeout(function() {
					_setActiveTab();
				}, opt.interval);
				
				jQuery.timetabs.gDLI[gDLIndex].timeLeft = opt.interval;
			}
			
			function _pause() {
				clearTimeout(jQuery.timetabs.gDLI[gDLIndex].timeOut);
				if(delayedStartInterval) clearTimeout(delayedStartInterval);
				continueFlag = true;
				var timeRan = new Date().valueOf() - gDLI().stTime;
				jQuery.timetabs.gDLI[gDLIndex].timeLeft -= timeRan;
			}
			
			function _unpause() {
				if(opt.continueOnMouseLeave === true) {
					delayedStartInterval = setTimeout(function() {
						jQuery.timetabs.gDLI[gDLIndex].timeout = setTimeout(function() {
							_setActiveTab();
						},  gDLI().timeLeft);
					}, 350);
				} else {
					jQuery(gDLI().t).unbind('mouseover', _pause).unbind('mouseenter', _pause).unbind('mouseleave', _unpause);
					jQuery(gDLI().c).unbind('mouseover', _pause).unbind('mouseenter', _pause).unbind('mouseleave', _unpause);
				}
			}
			
			function _setActiveTab(el, e) {
				
				clearTimeout(jQuery.timetabs.gDLI[gDLIndex].timeOut);
				if(delayedStartInterval) clearTimeout(delayedStartInterval);
				
				if(typeof el == 'number') {
					index = el;
				} else if(typeof el == 'undefined') {
					index = gDLI().cIndex + 1;
				} else if(typeof el == 'object') {
					index = gDLI().selfObj.children('dt').index(el);
				} else {
					index = 0;
				}
				
				if(index == gDLI().t.length) {
					index = 0;
				}
				
				if(typeof e !== 'undefined' && jQuery.timetabs.gDLI[gDLIndex].cIndex == index) {
					_startIntervalAftersetActiveTab(e);
					return;
				}
				
				opt.beforeChange(gDLI());

				switch(opt.animated) {
					
					case false:
						break;
					
					default:
					case 'slide':
					case 'curtain':
					case 'fade':
						gDLI().selfObj.children('dt.active').removeClass('active');
						jQuery(gDLI().t.get(index)).addClass('active');
						break;
				}

				switch(opt.animated) {
					
					case false:
						gDLI().selfObj.children('.active').removeClass('active');
						jQuery(gDLI().t.get(index)).addClass('active').next('dd').addClass('active');
						_startIntervalAftersetActiveTab(e);
						break;
					
					case 'slide':
						if(gDLI().selfObj.children('dd.active').length == 0) {
							jQuery(gDLI().c.get(index)).addClass('active');
							_startIntervalAftersetActiveTab(e);
						} else {
							gDLI().selfObj.children('dd.active').slideUp(opt.animationSpeed, function() {
								jQuery(gDLI().c.get(index)).slideDown(opt.animationSpeed, function() {
									_startIntervalAftersetActiveTab(e);
									jQuery(this).addClass('active');
								});
								jQuery(this).removeClass('active').hide();
							});
						}
						break;
						
					case 'curtain':
						jQuery(gDLI().c.get(index)).css('z-index', '10000').slideDown(opt.animationSpeed, function() {
							gDLI().selfObj.children('dd.active').removeClass('active').hide();
							_startIntervalAftersetActiveTab(e);
							jQuery(this).css('z-index', '1').addClass('active');
						});
						break;
						
					default:
					case 'fade':
						jQuery(gDLI().c.get(index)).css('z-index', '10000').fadeIn(opt.animationSpeed, function() {
							gDLI().selfObj.children('dd.active').removeClass('active').hide();
							_startIntervalAftersetActiveTab(e);
							jQuery(this).css('z-index', '1').addClass('active');
						});
						break;
				}
				
				jQuery.timetabs.gDLI[gDLIndex].cIndex = index;
				
				opt.afterChange(gDLI());
			}
			
			function _startIntervalAftersetActiveTab(e) {
				if(opt.continueOnMouseLeave === false && continueFlag === true) {
					return;
				}
				if(typeof e !== 'undefined' && ((isNaN(opt.interval)) !== true || parseInt(opt.interval) > 0)) {
					gDLI().selfObj.one('mouseleave', function() {
						_startInterval();
					});
				} else _startInterval();
			}
			
			function gDLI() {
				return jQuery.timetabs.gDLI[gDLIndex];	
			}
		});
	};

	jQuery.timetabs = {
		
		defaults: {
			defaultIndex: 0,
			interval: 2500,
			continueOnMouseLeave: true,
			animated: true,
			animationSpeed: 500,
			beforeChange: function(){},  // before load-function
			afterChange: function(){}	 // after load-function
		},
		
		gDLI: [] // global "dl" index
	}

})(jQuery);

$(document).ready(function(){
	jQuery('dl.tabs').addClass('enabled').timetabs({
		defaultIndex: 3,
		interval: 3500,
		continueOnMouseLeave: true,
		animated: 'fade',
		animationSpeed: 500
	});
});