/*=============================    
jquery.barousel.js 
v.0.1
Julien Decaudin - 03/2010
www.juliendecaudin.com
=============================*/

(function ($) {
	$.fn.barousel = function (callerSettings) {
		var settings = $.extend({
			imageWrapper: '.barousel_image',
			contentWrapper: '.barousel_content',
			contentLinksWrapper: null,
			navWrapper: '.barousel_nav',
			slideDuration: 5000, //duration of each slide in milliseconds
			navType: 1, //1: boxes navigation; 2: prev/next navigation; 3: custom navigation
			fadeIn: 1, //fade between slides; activated by default
			fadeInSpeed: 600, //fade duration in milliseconds 
			manualCarousel: 0, //manual carousel if set to 1
			contentResize: 1, //resize content container
			contentResizeSpeed: 300, //content resize speed in milliseconds
			debug: 0
		}, callerSettings || {});

		settings.imageWrapper = $(this).find(settings.imageWrapper);
		settings.contentWrapper = $(this).find(settings.contentWrapper);
		settings.contentLinksWrapper = $(settings.contentLinksWrapper);
		settings.navWrapper = $(this).find(settings.navWrapper);
		settings.imageList = settings.imageWrapper.find('img').not('[class*=intro]'); //list of the items' background image (intro image is ignored)
		settings.contentList = settings.contentWrapper.find('div').not('[class*=intro]'); //list of the items' content (intro content is ignored)
		settings.contentLinksList = settings.contentLinksWrapper.find('a'); //list of the items' content links (optional)
		settings.imageIntro = settings.imageWrapper.find('img[class*=intro]');
		settings.contentIntro = settings.contentWrapper.find('div[class*=intro]');
		settings.currentIndex = 0; //index of the current displayed item
		settings.totalItem = settings.imageList.length; //total number of items
		settings.stopCarousel = 0; //flag to stop the carousel
		settings.timerCarousel; //timer for the carousel
		settings.navFreeze = 0; //flag to avoid clicking too fast on the nav
		settings.introActive = 0; //flag to know if there is an intro state and if it's active

		if (settings.imageWrapper.find('img[class*=intro]').length > 0) {
			settings.introActive = 1;
		}

		if (settings.totalItem == 1) {
			//$(settings.navWrapper).hide();            
		} else {
			//set the index of each image  
			settings.imageList.each(function (n) { this.index = n; });

			//set the index of each content  
			settings.contentList.each(function (n) { this.index = n; });

			//set the index of each content link (optional) 
			settings.contentLinksList.each(function (n) { this.index = n; });

			//return error if different number of images and contents
			if (settings.imageList.length != settings.contentList.length) {
				/* DEBUG */
				if (settings.debug == 1) console.log('[Barousel error] images and contents must be the same number');
				return this;
			}

			//init the default content height
			if (settings.contentResize == 1 && settings.introActive == 0) {
				$(settings.contentWrapper).height($(settings.contentList[settings.currentIndex]).height() + 10);
			}

			//init the content link default state (optional)
			if (settings.contentLinksWrapper != null) {
				$(settings.contentLinksList[settings.currentIndex]).addClass('current');
			}

			//build the navigation
			if (settings.navType == 1) {
				//items navigation type
				var strNavList = "<ul>";
				settings.imageList.each(function (n) {
					var currentClass = "";
					if (n == 0) currentClass = "current";
					strNavList += "<li><a href='#' title='" + $(settings.contentList[n]).find('p.header').text() + "' class='" + currentClass + "'>&nbsp;</a></li>";
				});
				strNavList += "</ul>";
				settings.navWrapper.append(strNavList);
				settings.navList = settings.navWrapper.find('a'); //list of the items' nav link

				//set the index of each nav link
				settings.navList.each(function (n) { this.index = n; });

			} else if (settings.navType == 2) {
				//prev/next navigation type
				var strNavList = "<ul>";
				strNavList += "<li class='prev'><a href='#' title='previous'>&nbsp;</a></li>";
				strNavList += "<li class='next'><a href='#' title='next'>&nbsp;</a></li>";
				strNavList += "</ul><div class='counter'><span class='counter_current'>1</span>/<span class='counter_total'>" + settings.totalItem + "</span></div>";
				settings.navWrapper.append(strNavList);
				settings.navList = settings.navWrapper.find('a'); //list of the items' nav link
			} else if (settings.navType == 3) {
				//custom navigation [static build]
				settings.navList = settings.navWrapper.find('a'); //list of the items' nav link
				//set the index of each nav link
				settings.navList.each(function (n) { this.index = n; });
			}

			//init the navigation click event
			if (settings.navType == 1 || settings.navType == 3) {
				//items navigation type
				settings.navList.each(function (n) {
					$(this).click(function () {
						if (settings.navFreeze == 0) {
							window.clearTimeout(settings.timerCarousel);
							settings.stopCarousel = 1;
							if (settings.currentIndex != n || settings.introActive == 1) {
								loadItem(settings, n);
								settings.currentIndex = n;
							}
						}
						settings.introActive = 0;
						return false;
					});
				});
			} else if (settings.navType == 2) {
				//prev/next navigation type
				settings.navList.each(function () {
					$(this).click(function () {
						if (settings.navFreeze == 0) {
							window.clearTimeout(settings.timerCarousel);
							settings.stopCarousel = 1;

							if ($(this).parent().hasClass('prev')) {
								var previousIndex;

								if (parseInt(settings.currentIndex) == 0) {
									previousIndex = parseInt(settings.totalItem) - 1;
								} else {
									previousIndex = parseInt(settings.currentIndex) - 1;
								}
								loadItem(settings, previousIndex);
								settings.currentIndex = previousIndex;

							} else if ($(this).parent().hasClass('next')) {
								var nextIndex;

								if (parseInt(settings.currentIndex) == (parseInt(settings.totalItem) - 1)) {
									nextIndex = 0;
								} else {
									nextIndex = parseInt(settings.currentIndex) + 1;
								}
								loadItem(settings, nextIndex);
								settings.currentIndex = nextIndex;
							}
						}
						settings.introActive = 0;
						return false;
					});
				});
			}

			//start the carousel
			if (settings.manualCarousel == 0) {
				var loadItemCall = function () { loadItem(settings, 1); };
				settings.timerCarousel = window.setTimeout(loadItemCall, settings.slideDuration);
			}
		}

		return this;
	};

	var loadItem = function (settings, index) {
		//reset the nav link current state
		if (settings.navType != 2) {
			settings.navList.each(function (n) { $(this).removeClass('current'); });
			$(settings.navList[index]).addClass('current');
		}

		//Change the background image then display the new content
		var currentImage;
		if (settings.introActive == 1) {
			currentImage = $(settings.imageIntro);
		} else {
			currentImage = $(settings.imageList[settings.currentIndex]);
		}
		var nextImage = $(settings.imageList[index]);

		/* DEBUG */
		if (settings.debug == 1) {
			console.log('[Barousel loadItem] currentImage:' + currentImage.attr('src'));
			console.log('[Barousel loadItem] nextImage:' + nextImage.attr('src'));
		}

		if (!currentImage.hasClass('default')) { currentImage.attr('class', 'previous'); }
		nextImage.attr('class', 'current');

		//fade-in effect
		if (settings.fadeIn == 0) {
			nextImage.show();
			currentImage.hide();
			loadModuleContent(settings, index);
		} else {
			settings.navFreeze = 1;
			$(settings.contentList).hide();
			nextImage.fadeIn(settings.fadeInSpeed, function () {
				currentImage.hide();
				currentImage.removeClass('previous');
				settings.navFreeze = 0;
			});
			loadModuleContent(settings, index);
		}

		//carousel functionnality (deactivated when the user click on an item)
		if (settings.stopCarousel == 0) {
			settings.currentIndex = index;
			var nextIndex;

			if (settings.currentIndex == settings.totalItem - 1) {
				nextIndex = 0;
			} else {
				nextIndex = parseInt(settings.currentIndex) + 1;
			}
			var loadItemCall = function () { loadItem(settings, nextIndex); };
			settings.timerCarousel = window.setTimeout(loadItemCall, settings.slideDuration);
		}
	};

	var loadModuleContent = function (settings, index) {
		if (settings.introActive == 1) {
			$(settings.contentIntro).hide();
			$(settings.contentWrapper).attr('class', '');
		}

		//Resize content        
		if (settings.contentResize == 1 && parseInt($(settings.contentWrapper).height()) != parseInt($(settings.contentList[index]).height() + 10)) {
			$(settings.contentWrapper).animate({
				height: $(settings.contentList[index]).height() + 10
			}, settings.contentResizeSpeed, function () {
				loadModuleContentAction(settings, index);
			});
		} else {
			loadModuleContentAction(settings, index);
		}

		//update counter for previous/next nav
		if (settings.navType == 2) {
			$(settings.navWrapper).find('.counter_current').text(index + 1);
		}
	};

	var loadModuleContentAction = function (settings, index) {
		//display the loaded content                
		$(settings.contentList).hide();
		$(settings.contentList[index]).show();

		if (settings.contentLinksWrapper != null) {
			$(settings.contentLinksList).removeClass('current');
			$(settings.contentLinksList[index]).addClass('current');
		}
	};

})(jQuery);