(function($){
	$.fn.jdiaporama = function(options) {
	
		var defaults = {
			auto: true,
			delay: 3,
			animationspeed: "normal",
			controls: true,
			keyboard: true,
			infos: true,
			currentimage: true,
			paused: false,
			boucles: 0,
			sens: "right",
			onrollover: true
		};
				
		var options = $.extend(defaults, options);
		
		this.each(function(){
			
			// si le diaporama comporte plus qu'une image
			if($("li", diapo).length > 1){
			
				var diapo = $(this);
				var mouseover = false;
				var sens = options.sens;
				var pause = false;
				var width = 0;
				var height = 0;
				var current_slide = 0;
				
				diapo.wrap("<div class='jdiaporama'></div>");
				
				// detection et actions des mouseover
				diapo.parent().mouseenter(function(){
					mouseover = true;
					if(options.onrollover)
						displayinfos($("li.active", diapo), "show");
					
					if(options.controls)
						diapo.siblings(".jdiaporama_controls").fadein();
						
				}).mouseleave(function(){
					mouseover = false;
					if(options.onrollover)
						displayinfos($("li.active", diapo), "hide");
					
					if(options.controls)
						 diapo.siblings(".jdiaporama_controls").hide();
				});
				
				function init()
				{
					// ajustement de la taille du container
					width = $("li:first-child img", diapo).width();
					height = $("li:first-child img", diapo).height();
					
					diapo.width(width);
					diapo.height(height);
					diapo.parent().width(width);
					diapo.parent().height(height);
					
					if(options.controls)
						diapo.siblings(".jdiaporama_status").show();
						
					if(options.auto && options.paused)
						$(".pause", diapo.siblings()).trigger("click");
						
					if(!options.onrollover)
						displayinfos($("li", diapo), "show");
					
					$("#jdiaporama_bullet_"+(parseint($("li", diapo).index($("li:first-child", diapo)))+1), diapo.siblings()).addclass("active");
				}
			
				var inter = "";
				
				if(options.auto && !options.paused)
					inter = setinterval(function(){displaydiaporama(options)}, (options.delay*1000));
				
				$("li", diapo).hide();
				$("li:first-child", diapo).addclass("active").fadein(options.animationspeed, init);
				
				// pour chaque �l�ment
				$("li", diapo).each(function(){
					elt = $(this);
					
					i = parseint($("li", diapo).index($(this))+1);
					$(this).attr("id", "jdiaporama_image_"+i);

					// affichage de la description si renseign� et activ�
					if(options.infos)
					{
						var is_desc = ($("img", elt).attr("title") != "");
						var is_title = ($("img", elt).attr("alt") != "");
												
						if(is_desc)
							elt.append("<p class='desc'>"+$("img", elt).attr("title")+"</p>");
							
						if(is_title)
							elt.append("<p class='title'>"+$("img", elt).attr("alt")+"</p>");
						
						if(options.currentimage)
							elt.append("<p class='count'>"+parseint($("li", diapo).index(elt)+1)+"/"+diapo.children().length+"</p>");
					}
				})
				
				// navigation au clavier
				if(options.keyboard)
					$(document).keydown(function(event) {
						switch(event.keycode){
							case 37 : // fl�che gauche
								prev();
							break;
							
							case 39 : // fl�che droite
								next();
							break;
						}
					});
								
				// controls
				if(options.controls)
				{
					// etat du diaporama
					diapo.after("<div class='jdiaporama_status'></div>");
					$("li", diapo).each(function(){
						i = parseint($("li", diapo).index($(this))+1);
						$(".jdiaporama_status", diapo.parent()).append("<a id='jdiaporama_bullet_"+i+"' href='#'>image "+i+"</a>");
					})
					
					$(".jdiaporama_status", diapo.parent()).css("margin-left", -($(".jdiaporama_status", diapo.parent()).width()/2));
					
					$(".jdiaporama_status a", diapo.parent()).click(function(){
						nextimage(options, $(this));
						return false;
					})
					
					diapo.after("<div class='jdiaporama_controls'><a href='#' class='prev'>prec.</a> " + ((options.auto)?"<a href='#' class='pause'>pause</a>":"") + " <a href='#' class='next'>suiv.</a></div>");
					
					$(".prev", diapo.siblings()).click(function(){
						prev();
						return false;
					});
					
					$(".next", diapo.siblings()).click(function(){
						next();
						return false;
					});
													
					$(".pause", diapo.siblings()).click(function(){
						if($(this).hasclass("pause"))
						{
							$(this).removeclass("pause").addclass("play");
							clearinterval(inter);
							pause = true;
						}
						else
						{
							$(this).removeclass("play").addclass("pause");
							inter = setinterval(function(){displaydiaporama(options)}, (options.delay*1000));
							pause = false;
						}
						
						return false;
					});
				}
				
				function next()
				{
					if(!$("li.active", diapo).is(":last-child"))
						elt =  $("li.active", diapo).next();
					else
						elt =  $("li:first-child", diapo);
						
					nextimage(options, elt);
					sens = "right";
				}
				
				function prev()
				{
					if(!$("li.active", diapo).is(":first-child"))
						elt =  $("li.active", diapo).prev();
					else
						elt =  $("li:last-child", diapo);
						
					nextimage(options, elt);
					sens = "left";
				}
				
				// affichage des infos sur l'image courante
				function displayinfos(elt, display)
				{
					var is_desc = ($("img", elt).attr("title") != "");
					var is_title = ($("img", elt).attr("alt") != "");
				
					if(is_desc)
						if(display == "show")
							$(".desc", elt).slidedown("fast");
						else
							$(".desc", elt).slideup("fast");
					if(is_title)
						if(display == "show")
							$(".title", elt).slidedown("fast");
						else
							$(".title", elt).slideup("fast");
					if(options.currentimage)
						if(display == "show")
							$(".count", elt).slidedown("fast");
						else
							$(".count", elt).slideup("fast");
				}
				
				// affiche l'�l�ment suivant
				function nextimage(options, elt)
				{
					clearinterval(inter);
					
					$("li.active", diapo).fadeout(options.animationspeed).removeclass("active");
					$(".jdiaporama_status a", diapo.parent()).removeclass("active");
					
					id = elt.attr("id").split("_")[2];
					$("li#jdiaporama_image_"+id, diapo).addclass("active").fadein(options.animationspeed);
					$("#jdiaporama_bullet_"+id, diapo.siblings()).addclass("active");

					if(options.infos && mouseover && options.onrollover)
						displayinfos($("li.active", diapo), "show");
					else if(!mouseover && options.onrollover)
						displayinfos($("li.active", diapo), "hide");
						
					if(!pause && options.auto)
					{
						if(options.boucles == 0 || (options.boucles > 0 && (diapo.data("current_slide")/diapo.children().length) < options.boucles ))
							inter = setinterval(function(){displaydiaporama(options)}, (options.delay*1000));
						else
							$(".pause", diapo.siblings()).remove();
					}
				}
				
				function displaydiaporama(options)
				{
					current_slide++;
					diapo.data("current_slide", current_slide);
					
					if(sens == "right")
						next();
					else
						prev();
				}
				
			}
		});
		
		return this;
	};
})(jquery);