/*
	jQuery Coda-Slider v2.0 - http://www.ndoherty.biz/coda-slider
	Copyright (c) 2009 Niall Doherty
	This plugin available for use in all personal or commercial projects under both MIT and GPL licenses.
*/

jQuery(function(){
	// Remove the coda-slider-no-js class from the body
	jQuery(".coda-slider-no-js").removeClass("coda-slider-no-js");
	// Preloader
	jQuery(".coda-slider").children('.panel').hide().end().prepend('<p class="loading">Loading...</p>');
});

var sliderCount = 1;

jQuery.fn.codaSlider = function(settings) {

	settings = jQuery.extend({
		autoHeight: true,
		autoHeightEaseDuration: 1000,
		autoHeightEaseFunction: "easeInOutExpo",
		autoSlide: false,
		autoSlideInterval: 7000,
		autoSlideStopWhenClicked: true,
		crossLinking: true,
		dynamicArrows: true,
		dynamicArrowLeftText: "&#171; left",
		dynamicArrowRightText: "right &#187;",
		dynamicTabs: true,
		dynamicTabsAlign: "center",
		dynamicTabsPosition: "top",
		externalTriggerSelector: "a.xtrig",
		firstPanelToLoad: 1,
		panelTitleSelector: "h2.title",
		slideEaseDuration: 1000,
		slideEaseFunction: "easeInOutExpo",
                cyclePanels: true,
                direction: "horizontal"
	}, settings);
	
	return this.each(function(){
		
		// Uncomment the line below to test your preloader
		// alert("Testing preloader");
		
		var slider = jQuery(this);
		
		// If we need arrows
		if (settings.dynamicArrows) {
			slider.parent().addClass("arrows");
			slider.before('<div class="coda-nav-left" id="coda-nav-left-' + sliderCount + '"><a href="#">' + settings.dynamicArrowLeftText + '</a></div>');
			slider.after('<div class="coda-nav-right" id="coda-nav-right-' + sliderCount + '"><a href="#">' + settings.dynamicArrowRightText + '</a></div>');
		};

                var leftArrow  = jQuery("#coda-nav-left-"  + sliderCount + " a");
                var rightArrow = jQuery("#coda-nav-right-" + sliderCount + " a");
		
		var panelWidth  = slider.find(".panel").width();
		var panelHeight = slider.find(".panel").height();
		var panelCount  = slider.find(".panel").size();
		var panelContainerWidth     = panelWidth*panelCount;
		var panelContainerHeight    = panelHeight*panelCount;
		var navClicks   = 0; // Used if autoSlideStopWhenClicked = true
		
		// Surround the collection of panel divs with a container div (wide enough for all panels to be lined up end-to-end)
		jQuery('.panel', slider).wrapAll('<div class="panel-container"></div>');
		// Specify the width of the container div (wide enough for all panels to be lined up end-to-end)
                if ( settings.direction == 'vertical' ) {
		    jQuery(".panel-container", slider).css({ height: panelContainerHeight });
                } else {
		    jQuery(".panel-container", slider).css({ width: panelContainerWidth });
                }
		
		// Specify the current panel.
		// If the loaded URL has a hash (cross-linking), we're going to use that hash to give the slider a specific starting position...
		if (settings.crossLinking && location.hash && parseInt(location.hash.slice(1)) <= panelCount) {
			var currentPanel = parseInt(location.hash.slice(1));
                        var offset;
                        if ( settings.direction == 'vertical' ) {
			    offset = - (panelHeight*(currentPanel - 1));
			    jQuery('.panel-container', slider).css({ marginTop: offset });
                        } else {
			    offset = - (panelWidth*(currentPanel - 1));
			    jQuery('.panel-container', slider).css({ marginLeft: offset });
                        }
		// If that's not the case, check to see if we're supposed to load a panel other than Panel 1 initially...
		} else if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) { 
			var currentPanel = settings.firstPanelToLoad;
			var offset;
                        if ( settings.direction == 'vertical' ) {
			    offset = - (panelHeight*(currentPanel - 1));
			    jQuery('.panel-container', slider).css({ marginTop: offset });
                        } else {
			    offset = - (panelWidth*(currentPanel - 1));
			    jQuery('.panel-container', slider).css({ marginLeft: offset });
                        }
		// Otherwise, we'll just set the current panel to 1...
		} else { 
			var currentPanel = 1;
		};
			
		// Left arrow click
		leftArrow.click(function(){
			navClicks++;

                        if (currentPanel == 1 && settings.cyclePanels == false) {
                            return false;
                        }

			if (currentPanel == 1) {
                                if ( settings.direction == 'vertical' ) {
				    offset = - (panelHeight*(panelCount - 1));
                                } else {
				    offset = - (panelWidth*(panelCount - 1));
                                }
				alterPanelHeight(panelCount - 1);
				currentPanel = panelCount;
				slider.siblings('.coda-nav').find('a.current').removeClass('current').parents('ul').find('li:last a').addClass('current');
			} else {
				currentPanel -= 1;
				alterPanelHeight(currentPanel - 1);
                                if ( settings.direction == 'vertical' ) {
				    offset = - (panelHeight*(currentPanel - 1));
                                } else {
				    offset = - (panelWidth*(currentPanel - 1));
                                }
				slider.siblings('.coda-nav').find('a.current').removeClass('current').parent().prev().find('a').addClass('current');
			};
                        if ( settings.direction == 'vertical' ) {
                            jQuery('.panel-container', slider).animate({ marginTop: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                        } else {
                            jQuery('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                        }
                        
                        adjustArrowsActivation();
                        
			if (settings.crossLinking) { location.hash = currentPanel }; // Change the URL hash (cross-linking)
			return false;
		});
			
		// Right arrow click
		rightArrow.click(function(){
			navClicks++;

                        if (currentPanel == panelCount && settings.cyclePanels == false) {
                            return false;
                        }

			if (currentPanel == panelCount) {
				offset = 0;
				currentPanel = 1;
				alterPanelHeight(0);
				slider.siblings('.coda-nav').find('a.current').removeClass('current').parents('ul').find('a:eq(0)').addClass('current');
			} else {
                                if ( settings.direction == 'vertical' ) {
				    offset = - (panelHeight*currentPanel);
                                } else {
				    offset = - (panelWidth*currentPanel);
                                }
				alterPanelHeight(currentPanel);
				currentPanel += 1;
				slider.siblings('.coda-nav').find('a.current').removeClass('current').parent().next().find('a').addClass('current');
			};

                        adjustArrowsActivation();

                        if ( settings.direction == 'vertical' ) {
			    jQuery('.panel-container', slider).animate({ marginTop: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                        } else {
			    jQuery('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                        }
			if (settings.crossLinking) { location.hash = currentPanel }; // Change the URL hash (cross-linking)
			return false;
		});
		
		// If we need a dynamic menu
		if (settings.dynamicTabs) {
			var dynamicTabs = '<div class="coda-nav" id="coda-nav-' + sliderCount + '"><ul></ul></div>';
			switch (settings.dynamicTabsPosition) {
				case "bottom":
					slider.parent().append(dynamicTabs);
					break;
				default:
					slider.parent().prepend(dynamicTabs);
					break;
			};
			ul = jQuery('#coda-nav-' + sliderCount + ' ul');
			// Create the nav items
			jQuery('.panel', slider).each(function(n) {
				ul.append('<li class="tab' + (n+1) + '"><a href="#' + (n+1) + '">' + jQuery(this).find(settings.panelTitleSelector).text() + '</a></li>');
			});
			navContainerWidth = slider.width() + slider.siblings('.coda-nav-left').width() + slider.siblings('.coda-nav-right').width();
			ul.parent().css({ width: navContainerWidth });
			switch (settings.dynamicTabsAlign) {
				case "center":
					ul.css({ width: (jQuery("li", ul).width() + 2) * panelCount });
					break;
				case "right":
					ul.css({ float: 'right' });
					break;
			};
		};
			
		// If we need a tabbed nav
		jQuery('#coda-nav-' + sliderCount + ' a').each(function(z) {
			// What happens when a nav link is clicked
			jQuery(this).bind("click", function() {
				navClicks++;
				jQuery(this).addClass('current').parents('ul').find('a').not(jQuery(this)).removeClass('current');
				offset = - (panelWidth*z);
				alterPanelHeight(z);
				currentPanel = z + 1;
				jQuery('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
				if (!settings.crossLinking) { return false }; // Don't change the URL hash unless cross-linking is specified
			});
		});
		
		// External triggers (anywhere on the page)
		jQuery(settings.externalTriggerSelector).each(function() {
			// Make sure this only affects the targeted slider
			if (sliderCount == parseInt(jQuery(this).attr("rel").slice(12))) {
				jQuery(this).bind("click", function() {
					navClicks++;
					targetPanel = parseInt(jQuery(this).attr("href").slice(1));
					offset = - (panelWidth*(targetPanel - 1));
					alterPanelHeight(targetPanel - 1);
					currentPanel = targetPanel;
					// Switch the current tab:
					slider.siblings('.coda-nav').find('a').removeClass('current').parents('ul').find('li:eq(' + (targetPanel - 1) + ') a').addClass('current');
					// Slide
					jQuery('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
					if (!settings.crossLinking) { return false }; // Don't change the URL hash unless cross-linking is specified
				});
			};
		});
			
		// Specify which tab is initially set to "current". Depends on if the loaded URL had a hash or not (cross-linking).
		if (settings.crossLinking && location.hash && parseInt(location.hash.slice(1)) <= panelCount) {
			jQuery("#coda-nav-" + sliderCount + " a:eq(" + (location.hash.slice(1) - 1) + ")").addClass("current");
		// If there's no cross-linking, check to see if we're supposed to load a panel other than Panel 1 initially...
		} else if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) {
			jQuery("#coda-nav-" + sliderCount + " a:eq(" + (settings.firstPanelToLoad - 1) + ")").addClass("current");
		// Otherwise we must be loading Panel 1, so make the first tab the current one.
		} else {
			jQuery("#coda-nav-" + sliderCount + " a:eq(0)").addClass("current");
		};
		
                // Set height of coda slider
		if (settings.autoHeight) {
                        // Set the height of the first panel
			panelHeight = jQuery('.panel:eq(' + (currentPanel - 1) + ')', slider).height();
			slider.css({ height: panelHeight });

// IE7-Fix: IE7 berechnet aus irgendeinem Grund die Höhe der Panels der Gesamt-Slider-Höhe
// falsch. Der Slider ist ca. doppelt so hoch. Daher die Höhe hier per Javascript
// festlegen auf max(panelHeights), wenn autoHeight=false.
// Funktioniert, aber ist das sinnvoll? Wenn sich später der Inhalt
// eines Panels noch ändert, sollte doch die Slider-Größe noch dynamisch
// größer werden dürfen, oder? Hmm, wenn man das wollte, muss man
// die initiale Maximum-Height Berechnung abschaltbar machen,
// fals autoHeight false gesetzt ist.
		} else {
                    // Set coda slider height to the maximum panel height.
                    panelHeight = 0;
                    jQuery('.panel', slider).each(function(){
                        if ( jQuery(this).height() > panelHeight ) {
                            panelHeight = jQuery(this).height();
                        }
                    })

                    slider.css({ height: panelHeight });
//                    leftArrow.css({ height: panelHeight });
//                    rightArrow.css({ height: panelHeight });
//                    leftArrow.parent().css({ height: panelHeight });
//                    rightArrow.parent().css({ height: panelHeight });
//                    jQuery('.coda-nav-left', slider).css({ height: panelHeight });
//                    jQuery('.coda-nav-right', slider).css({ height: panelHeight });
                }

                adjustArrowsActivation();
		
		// Trigger autoSlide
		if (settings.autoSlide) {
			slider.ready(function() {
				setTimeout(autoSlide,settings.autoSlideInterval);
			});
		};
		
		function alterPanelHeight(x) {
			if (settings.autoHeight) {
				panelHeight = jQuery('.panel:eq(' + x + ')', slider).height()
				slider.animate({ height: panelHeight }, settings.autoHeightEaseDuration, settings.autoHeightEaseFunction);
			};
		};
		
		function autoSlide() {
			if (navClicks == 0 || !settings.autoSlideStopWhenClicked) {
				if (currentPanel == panelCount) {
					var offset = 0;
					currentPanel = 1;
				} else {
					var offset = - (panelWidth*currentPanel);
					currentPanel += 1;
				};
				alterPanelHeight(currentPanel - 1);
				// Switch the current tab:
				slider.siblings('.coda-nav').find('a').removeClass('current').parents('ul').find('li:eq(' + (currentPanel - 1) + ') a').addClass('current');
				// Slide:
				jQuery('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                                adjustArrowsActivation();
				setTimeout(autoSlide,settings.autoSlideInterval);
			};
		};

		function adjustArrowsActivation() {
			if (settings.cyclePanels == true) {
				return;
			};

                        leftArrow.removeClass('inactive');
                        rightArrow.removeClass('inactive');
                                
                        if ( currentPanel == 1 ) {
                            leftArrow.addClass('inactive');
                        } 
                        if ( currentPanel == panelCount ) {
                            rightArrow.addClass('inactive');
                        }
		};
		
		// Kill the preloader
		jQuery('.panel', slider).show().end().find("p.loading").remove();
		slider.removeClass("preload");
		
		sliderCount++;
		
	});
};