/* jQuery Carousel 0.9.2
Copyright 2008-2009 Thomas Lanciaux and Pierre Bertet.
This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
*/
;
(function($) {
	$.fn.carousel = function(params) {
		var params = $.extend({
			direction: "horizontal",
			loop: true,
			dispItems: 1,
			pagination: false,
			paginationPosition: "inside",
			// nextBtn: '<a role="button">Next</a>',
			// prevBtn: '<a role="button">Previous</a>',
			// btnsPosition: "inside",
			// nextBtnInsert: "appendTo",
			// prevBtnInsert: "prependTo",
			// nextBtnInsertFn: false,
			// prevBtnInsertFn: false,
			autoSlide: true,
			autoSlideInterval: 3000,
			delayAutoSlide: false,
			combinedClasses: false,
			effect: "fade",
			slideEasing: "swing",
			animSpeed: "normal",
			// equalWidths: "true",
			// verticalMargin: 0,
			callback: function() {},
			useAddress: false,
			adressIdentifier: "carousel",
			tabLabel: function(tabNum) {
				return tabNum;
			}
		},
		params);
		if (params.btnsPosition == "outside") {
			params.prevBtnInsert = "insertBefore";
			params.nextBtnInsert = "insertAfter";
		}
		params.delayAutoSlide = params.delayAutoSlide || params.autoSlideInterval;
		return this.each(function() {
			var env = {
				$elts: {},
				params: params,
				launchOnLoad: []
			};
			env.$elts.carousel = $(this).addClass("js");
			env.$elts.content = $(this).children().css({
				position: "absolute",
				"top": 0
			});
			env.$elts.wrap = env.$elts.content.wrap('<div class="carousel-wrap"></div>').parent().css({
				overflow: "hidden",
				position: "relative"
			});
			env.steps = {
				first: 0,
				count: env.$elts.content.children().length
			};
			env.steps.last = env.steps.count - 1;
			if ($.isFunction(env.params.prevBtnInsertFn)) {
				env.$elts.prevBtn = env.params.prevBtnInsertFn(env.$elts);
			} else {
				env.$elts.prevBtn = $(params.prevBtn)[params.prevBtnInsert](env.$elts.carousel);
			}
			if ($.isFunction(env.params.nextBtnInsertFn)) {
				env.$elts.nextBtn = env.params.nextBtnInsertFn(env.$elts);
			} else {
				env.$elts.nextBtn = $(params.nextBtn)[params.nextBtnInsert](env.$elts.carousel);
			}
			env.$elts.nextBtn.addClass("carousel-control next carousel-next");
			env.$elts.prevBtn.addClass("carousel-control previous carousel-previous");
			initButtonsEvents(env);
			if (env.params.pagination) {
				initPagination(env);
			}
			initAddress(env);
			$(function() {
				var $items = env.$elts.content.children();
				var $maxHeight = 0;
				$items.each(function() {
					$item = $(this);
					$itemHeight = $item.outerHeight();
					if ($itemHeight > $maxHeight) {
						$maxHeight = $itemHeight;
					}
				});
				if (env.params.verticalMargin > 0) {
					$maxHeight = $maxHeight + env.params.verticalMargin;
				}
				$items.height($maxHeight);
				var $firstItem = env.$elts.content.children(":first");
				env.itemWidth = $firstItem.outerWidth();
				if (params.direction == "vertical") {
					env.contentWidth = env.itemWidth;
				} else {
					if (params.equalWidths) {
						env.contentWidth = env.itemWidth * env.steps.count;
					} else {
						env.contentWidth = (function() {
							var totalWidth = 0;
							env.$elts.content.children().each(function() {
								totalWidth += $(this).outerWidth();
							});
							return totalWidth;
						})();
					}
				}
				env.$elts.content.width(env.contentWidth);
				env.itemHeight = $maxHeight;
				if (params.direction == "vertical") {
					env.$elts.content.css({
						height: env.itemHeight * env.steps.count + "px"
					});
					env.$elts.content.parent().css({
						height: env.itemHeight * env.params.dispItems + "px"
					});
				} else {
					env.$elts.content.parent().css({
						height: env.itemHeight + "px"
					});
				}
				updateButtonsState(env);
				$.each(env.launchOnLoad, function(i, fn) {
					fn();
				});
				if (env.params.autoSlide) {
					window.setTimeout(function() {
						env.autoSlideInterval = window.setInterval(function() {
							goToStep(env, getRelativeStep(env, "next"));
						},
						env.params.autoSlideInterval);
					},
					env.params.delayAutoSlide);
				}
			});
		});
	};

	function initButtonsEvents(env) {
		env.$elts.nextBtn.add(env.$elts.prevBtn).bind("enable", function() {
			var $this = $(this).unbind("click").bind("click", function() {
				goToStep(env, getRelativeStep(env, ($this.is(".next") ? "next" : "prev")));
				stopAutoSlide(env);
			}).removeClass("disabled");
			if (env.params.combinedClasses) {
				$this.removeClass("next-disabled previous-disabled");
			}
		}).bind("disable", function() {
			var $this = $(this).unbind("click").addClass("disabled");
			if (env.params.combinedClasses) {
				if ($this.is(".next")) {
					$this.addClass("next-disabled");
				} else if ($this.is(".previous")) {
					$this.addClass("previous-disabled");
				}
			}
		}).hover(function() {
			$(this).toggleClass("hover");
		});
	};

	function initPagination(env) {
		env.$elts.pagination = $('<div class="center-wrap"><div class="carousel-pagination"><p></p></div></div>')[((env.params.paginationPosition == "outside") ? "insertAfter" : "appendTo")](env.$elts.carousel).find("p");
		env.$elts.paginationBtns = $([]);
		env.$elts.content.find("li").each(function(i) {
			if (i % env.params.dispItems == 0) {
				env.$elts.paginationBtns = env.$elts.paginationBtns.add($('<a role="button"><span>' + env.params.tabLabel(env.$elts.paginationBtns.length + 1) + '</span></a>').data("firstStep", i));
			}
		});
		env.$elts.paginationBtns.each(function() {
			$(this).appendTo(env.$elts.pagination);
		});
		env.$elts.paginationBtns.slice(0, 1).addClass("active");
		env.launchOnLoad.push(function() {
			env.$elts.paginationBtns.click(function(e) {
				goToStep(env, $(this).data("firstStep"));
				stopAutoSlide(env);
			});
		});
	};

	function initAddress(env) {
		if (env.params.useAddress && $.isFunction($.fn.address)) {
			$.address.init(function(e) {
				var pathNames = $.address.pathNames();
				if (pathNames[0] === env.params.adressIdentifier && !!pathNames[1]) {
					goToStep(env, pathNames[1] - 1);
				} else {
					$.address.value('/' + env.params.adressIdentifier + '/1');
				}
			}).change(function(e) {
				var pathNames = $.address.pathNames();
				if (pathNames[0] === env.params.adressIdentifier && !!pathNames[1]) {
					goToStep(env, pathNames[1] - 1);
				}
			});
		} else {
			env.params.useAddress = false;
		}
	};

	function goToStep(env, step) {
		env.params.callback(step);
		transition(env, step);
		env.steps.first = step;
		updateButtonsState(env);
		if (env.params.useAddress) {
			$.address.value('/' + env.params.adressIdentifier + '/' + (step + 1));
		}
	};

	function getRelativeStep(env, position) {
		if (position == "prev") {
			if ((env.steps.first - env.params.dispItems) >= 0) {
				return env.steps.first - env.params.dispItems;
			} else {
				return ((env.params.loop) ? (env.steps.count - env.params.dispItems) : false);
			}
		} else if (position == "next") {
			if ((env.steps.first + env.params.dispItems) < env.steps.count) {
				return env.steps.first + env.params.dispItems;
			} else {
				return ((env.params.loop) ? 0 : false);
			}
		}
	};

	function transition(env, step) {
		switch (env.params.effect) {
		case "no":
			if (env.params.direction == "vertical") {
				env.$elts.content.css("top", -(env.itemHeight * step) + "px");
			} else {
				env.$elts.content.css("left", -(env.itemWidth * step) + "px");
			}
			break;
		case "fade":
			if (env.params.direction == "vertical") {
				env.$elts.content.hide().css("top", -(env.itemHeight * step) + "px").fadeIn(env.params.animSpeed);
			} else {
				env.$elts.content.hide().css("left", -(env.itemWidth * step) + "px").fadeIn(env.params.animSpeed);
			}
			break;
		default:
			if (env.params.direction == "vertical") {
				env.$elts.content.stop().animate({
					top: -(env.itemHeight * step) + "px"
				},
				env.params.animSpeed, env.params.slideEasing);
			} else {
				env.$elts.content.stop().animate({
					left: -(env.itemWidth * step) + "px"
				},
				env.params.animSpeed, env.params.slideEasing);
			}
			break;
		}
	};

	function updateButtonsState(env) {
		if (getRelativeStep(env, "prev") !== false) {
			env.$elts.prevBtn.trigger("enable");
		} else {
			env.$elts.prevBtn.trigger("disable");
		}
		if (getRelativeStep(env, "next") !== false) {
			env.$elts.nextBtn.trigger("enable");
		} else {
			env.$elts.nextBtn.trigger("disable");
		}
		if (env.params.pagination) {
			env.$elts.paginationBtns.removeClass("active").filter(function() {
				return ($(this).data("firstStep") == env.steps.first)
			}).addClass("active");
		}
	};

	function stopAutoSlide(env) {
		if ( !! env.autoSlideInterval) {
			window.clearInterval(env.autoSlideInterval);
		}
	};
})(jQuery);