/*
	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.
*/

$.fn.codaSlider = function(settings) {

	settings = $.extend({
		autoHeight: true,
		autoHeightEaseDuration: 1000,
		autoHeightEaseFunction: "easeInOutExpo",
		autoSlide: false,
		autoSlideInterval: 7000,
		autoSlideStopWhenClicked: true,
		crossLinking: true,
		dynamicArrows: true,
		dynamicArrowLeftText: "« left",
		dynamicArrowRightText: "right »",
		dynamicTabs: true,
		dynamicTabsAlign: "center",
		dynamicTabsPosition: "top",
		externalTriggerSelector: "a.xtrig",
		firstPanelToLoad: 1,
		panelTitleSelector: "h2.title",
		slideEaseDuration: 1000,
		slideEaseFunction: "easeInOutExpo",
		onSlide: false,
		continuous: true
	}, settings);
	
	return this.each(function(){
		var slider = $(this);
		var currentSlider = slider.attr('id').substring(12);
		
		// If we need arrows
		if (settings.dynamicArrows) {
			slider.parent().addClass("arrows");
			slider.before('<div class="coda-nav-left" id="coda-nav-left-' + currentSlider + '"><a href="#">' + settings.dynamicArrowLeftText + '</a></div>');
			slider.after('<div class="coda-nav-right" id="coda-nav-right-' + currentSlider + '"><a href="#">' + settings.dynamicArrowRightText + '</a></div>');
		};
		
		var panelWidth = slider.find(".panel").width();
		var panelCount = slider.find(".panel").size();
		var panelContainerWidth = panelWidth*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)
		$('.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)
		$(".panel-container", slider).css({width: panelContainerWidth});
		
		if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) { 
			var currentPanel = settings.firstPanelToLoad;
			var offset = - (panelWidth*(currentPanel - 1));
			$('.panel-container', slider).css({marginLeft: offset});
		// Otherwise, we'll just set the current panel to 1...
		} else { 
			var currentPanel = 1;
		}
			
		// Left arrow click
		$("#coda-nav-left-" + currentSlider + " a").click(function(){
			navClicks++;
			if (currentPanel == 1) {
				if (settings.continuous) {
					offset = - (panelWidth*(panelCount - 1));
					alterPanelHeight(panelCount - 1);
					currentPanel = panelCount;
					$('#coda-nav-' + currentSlider).find('a.current').removeClass('current').parents('ul').find('li:last a').addClass('current');
				}
			} else {
				currentPanel -= 1;
				alterPanelHeight(currentPanel - 1);
				offset = - (panelWidth*(currentPanel - 1));
				$('#coda-nav-' + currentSlider).find('a.current').removeClass('current').parent().prev().find('a').addClass('current');
			}
			$('.panel-container', slider).animate({marginLeft: offset}, settings.slideEaseDuration, settings.slideEaseFunction);
			if (settings.crossLinking) {location.hash = currentPanel}

			if (settings.onSlide) {
				settings.onSlide(currentPanel);
			}

			return false;
		});
			
		// Right arrow click
		$('#coda-nav-right-' + currentSlider + ' a').click(function(){
			navClicks++;
			if (currentPanel == panelCount) {
				if (settings.continuous) {
					offset = 0;
					currentPanel = 1;
					alterPanelHeight(0);
					$('#coda-nav-' + currentSlider).find('a.current').removeClass('current').parents('ul').find('a:eq(0)').addClass('current');
				}
			} else {
				offset = - (panelWidth*currentPanel);
				alterPanelHeight(currentPanel);
				currentPanel += 1;
				$('#coda-nav-' + currentSlider).find('a.current').removeClass('current').parent().next().find('a').addClass('current');
			}
			$('.panel-container', slider).animate({marginLeft: offset}, settings.slideEaseDuration, settings.slideEaseFunction);
			if (settings.crossLinking) {location.hash = currentPanel} // Change the URL hash (cross-linking)

			if (settings.onSlide) {
				settings.onSlide(currentPanel);
			}

			return false;
		});
		
		// If we need a dynamic menu
		if (settings.dynamicTabs) {
			var dynamicTabs = '<div class="coda-nav" id="coda-nav-' + currentSlider + '"><ul></ul></div>';
			switch (settings.dynamicTabsPosition) {
				case "bottom":
					slider.parent().append(dynamicTabs);
					break;
				default:
					slider.parent().prepend(dynamicTabs);
					break;
			}
			ul = $('#coda-nav-' + currentSlider + ' ul');
			// Create the nav items
			$('.panel', slider).each(function(n) {
				ul.append('<li class="tab' + (n+1) + '"><a href="#' + (n+1) + '">' + $(this).find(settings.panelTitleSelector).text() + '</a></li>');												
			});
			navContainerWidth = slider.width() + slider.siblings('.coda-nav-left').width() + slider.siblings('.coda-nav-right').width();
			ul.parent().css({width: navContainerWidth});
			switch (settings.dynamicTabsAlign) {
				case "center":
					ul.css({width: ($("li", ul).width() + 2) * panelCount});
					break;
				case "right":
					ul.css({float: 'right'});
					break;
			}
		}
			
		// If we need a tabbed nav
		$('#coda-nav-' + currentSlider + ' a').each(function(z) {
			// What happens when a nav link is clicked
			$(this).bind("click", function() {
				navClicks++;
				$(this).addClass('current').parents('ul').find('a').not($(this)).removeClass('current');
				offset = - (panelWidth*z);
				alterPanelHeight(z);
				currentPanel = z + 1;
				$('.panel-container', slider).animate({marginLeft: offset}, settings.slideEaseDuration, settings.slideEaseFunction);

				if (settings.onSlide) {
					settings.onSlide(currentPanel);
				}

				if (!settings.crossLinking) {return false}
			});
		});
		
		// External triggers (anywhere on the page)
		$(settings.externalTriggerSelector).each(function() {
			// Make sure this only affects the targeted slider
			if (currentSlider == parseInt($(this).attr("rel").slice(12))) {
				$(this).bind("click", function() {
					navClicks++;
					var hrArr = $(this).attr("href").split('#');
					targetPanel = parseInt(hrArr[hrArr.length - 1]);
					offset = - (panelWidth*(targetPanel - 1));
					alterPanelHeight(targetPanel - 1);
					currentPanel = targetPanel;
					// Switch the current tab:
					$('#coda-nav-' + currentSlider).find('a').removeClass('current').parents('ul').find('li:eq(' + (targetPanel - 1) + ') a').addClass('current');
					// Slide
					$('.panel-container', slider).animate({marginLeft: offset}, settings.slideEaseDuration, settings.slideEaseFunction);

					if (settings.onSlide) {
						settings.onSlide(currentPanel);
					}

					if (!settings.crossLinking) {return false}
				});
			}
		});
			
		if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) {
			$("#coda-nav-" + currentSlider + " a:eq(" + (settings.firstPanelToLoad - 1) + ")").addClass("current");
		} else {
			$("#coda-nav-" + currentSlider + " a:eq(0)").addClass("current");
		}
		
		// Set the height of the first panel
		if (settings.autoHeight) {
			panelHeight = $('.panel:eq(' + (currentPanel - 1) + ')', slider).height();
			slider.css({height: panelHeight});
		}
		
		// Trigger autoSlide
		if (settings.autoSlide) {
			slider.ready(function() {
				setTimeout(autoSlide,settings.autoSlideInterval);
			});
		}
		
		function alterPanelHeight(x) {
			if (settings.autoHeight) {
				panelHeight = $('.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:
				$('.panel-container', slider).animate({marginLeft: offset}, settings.slideEaseDuration, settings.slideEaseFunction);
				setTimeout(autoSlide,settings.autoSlideInterval);
			}
		}
		
		// Kill the preloader
		$('.panel', slider).show().end().find("p.loading").remove();
		slider.removeClass("preload");
	});
};