(function($) {

	$.fn.easySlider = function(options){
	  
		// default configuration properties
		var defaults = {			
			prevId: 		'prevBtn',
			prevText: 		'<img src="gestione_template/template/img/offerte_agriturismi_pitigliano_pulsante_sx.jpg" />',
			nextId: 		'nextBtn',	
			nextText: 		'<img src="gestione_template/template/img/offerte_agriturismi_pitigliano_pulsante_dx.jpg" />',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			lastShow:		false,				
			vertical:		false,
			speed: 			700,
			auto:			false,
			pause:			5000,
			continuous:		false, 
			numeric: 		false,
			numericId: 		'controls'
		}; 
		
		var options = $.extend(defaults, options);  
				
		this.each(function() {  
			var obj = $(this);            
			var s = $("li", obj).length;
            if(s >1) {
                var w = $("li", obj).width(); 
                var h = $("li", obj).height(); 
                var clickable = true;          
                obj.width(w); 
                obj.height(h); 
                obj.css("overflow","hidden");
                var ts = s-1;
                var t = 0;
                $("ul", obj).css('width',s*w);			
                
                if(options.continuous){
                    $("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left","-"+ w +"px"));
                    $("ul", obj).append($("ul li:nth-child(2)", obj).clone());
                    $("ul", obj).css('width',(s+1)*w);
                };				
                
                if(!options.vertical) $("li", obj).css('float','left');
                                    
                if(options.controlsShow){
                    var html = options.controlsBefore;				
                    if(options.numeric){
                        html += '<ol id="'+ options.numericId +'"></ol>';
                    } else {
                        if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
                        html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
                        html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
                        if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';				
                    };
                    
                    html += options.controlsAfter;						
                    $(obj).after(html);										
                };
                
                if(options.numeric){									
                    for(var i=0;i<s;i++){						
                        $(document.createElement("li"))
                            .attr('id',options.numericId + (i+1))
                            .html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')
                            .appendTo($("#"+ options.numericId))
                            .click(function(){							
                                animate($("a",$(this)).attr('rel'),true);
                            }); 												
                    };							
                } else {
                    $("a","#"+options.nextId).click(function(){		
                        animate("next",true);
                    });
                    $("a","#"+options.prevId).click(function(){		
                        animate("prev",true);				
                    });	
                    $("a","#"+options.firstId).click(function(){		
                        animate("first",true);
                    });				
                    $("a","#"+options.lastId).click(function(){		
                        animate("last",true);				
                    });				
                };
                
                function setCurrent(i){
                    i = parseInt(i)+1;
                    $("li", "#" + options.numericId).removeClass("current");
                    $("li#" + options.numericId + i).addClass("current");
                };
                
                function adjust(){
                    if(t>ts) t=0;		
                    if(t<0) t=ts;	
                    if(!options.vertical) {
                        $("ul",obj).css("margin-left",(t*w*-1));
                    } else {
                        $("ul",obj).css("margin-left",(t*h*-1));
                    }
                    clickable = true;
                    if(options.numeric) setCurrent(t);
                };
                
                function animate(dir,clicked){
                    if (clickable){
                        clickable = false;
                        var ot = t;
                        switch(dir){
                            case "next":
                                t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;						
                                break; 
                            case "prev":
                                t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;
                                break; 
                            case "first":
                                t = 0;
                                break; 
                            case "last":
                                t = ts;
                                break; 
                            default:
                                t = dir;
                                break; 
                        };	
                        var diff = Math.abs(ot-t);
                        var speed = diff*options.speed;						
                        if(!options.vertical) {
                            p = (t*w*-1);
                            $("ul",obj).animate(
                                { marginLeft: p }, 
                                { queue:false, duration:speed, complete:adjust }
                            );				
                        } else {
                            p = (t*h*-1);
                            $("ul",obj).animate(
                                { marginTop: p }, 
                                { queue:false, duration:speed, complete:adjust }
                            );					
                        };
                        
                        if(!options.continuous && options.controlsFade){					
                            if(t==ts){
                                $("a","#"+options.nextId).hide();
                                $("a","#"+options.lastId).hide();
                            } else {
                                $("a","#"+options.nextId).show();
                                $("a","#"+options.lastId).show();					
                            };
                            if(t==0){
                                $("a","#"+options.prevId).hide();
                                $("a","#"+options.firstId).hide();
                            } else {
                                $("a","#"+options.prevId).show();
                                $("a","#"+options.firstId).show();
                            };					
                        };				
                        
                        if(clicked) clearTimeout(timeout);
                        if(options.auto && dir=="next" && !clicked){;
                            timeout = setTimeout(function(){
                                animate("next",false);
                            },diff*options.speed+options.pause);
                        };
                
                    };
                    
                };
                // init
                var timeout;
                if(options.auto){;
                    timeout = setTimeout(function(){
                        animate("next",false);
                    },options.pause);
                };		
                
                if(options.numeric) setCurrent(0);
            
                if(!options.continuous && options.controlsFade){					
                    $("a","#"+options.prevId).hide();
                    $("a","#"+options.firstId).hide();				
                };
            }
		});	  
	};
})(jQuery);