(function($){
  $.fn.jDiaporama = function(options) {
  
    var defaults = {
      auto: true,
      delay: 3,
      animationSpeed: "normal",
      controls: true,
      status_controls: true,
      keyboard: false,
      infos: true,
      currentimage: false,
      paused: false,
      boucles: 0,
      sens: "right",
      onrollover: false,
      random: false
    };
        
    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 = 440;
        var height = 253;
        var current_slide = 0;
        var nb_slides = $("li", diapo).length;
        
        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");
          
          if(options.controls && options.status_controls)
            $("#jDiaporama_bullet_"+(parseInt($("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)
        {
          if(options.status_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));
            
            $(".jDiaporama_status a", diapo.parent()).click(function(){
              if($("li.active", diapo).attr("id").split("_")[2] != $(this).attr("id").split("_")[2])
                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(options.random)
            randomImage();
          else
          {
            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(options.random)
            randomImage();
          else
          {
            if(!$("li.active", diapo).is(":first-child"))
              elt =  $("li.active", diapo).prev();
            else
              elt =  $("li:last-child", diapo);
              
            nextImage(options, elt);
            sens = "left";
          }
        }
        
        function randomImage()
        {
          rand = Math.floor(Math.random() * nb_slides)+1;
          id = $("li.active", diapo).attr("id").split("_")[2];
          
          while(rand == id)
          {
            rand = Math.floor(Math.random() * nb_slides)+1;
          }
          
          nextImage(options, $("li#jDiaporama_image_"+rand, diapo));
        }
        
        // 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);
          
          if(options.controls && options.status_controls)
            $("#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);