/* 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:false,
            dispItems:1,
            pagination:false,
            paginationPosition:"inside",
            nextBtn:'<a role="button">Próximo</a>',
            prevBtn:'<a role="button">Anterior</a>',
            btnsPosition:"inside",
            nextBtnInsert:"appendTo",
            prevBtnInsert:"prependTo",
            nextBtnInsertFn:false,
            prevBtnInsertFn:false,
            autoSlide:false,
            autoSlideInterval:3000,
            delayAutoSlide:false,
            combinedClasses:false,
            effect:"slide",
            slideEasing:"swing",
            animSpeed:"normal",
            equalWidths:"true",
            verticalMargin:0,
            callback:function(){},
            useAddress:false,
            adressIdentifier:"carousel",
            tabLabel:function(tabNum){return tabNum;},
            arrLabels:new Array()
        },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;

                var aux = 0;

                $items.each(function(){

                    $item = $(this);

                    env.params.arrLabels[aux] = $item.children().attr('alt');

                    $itemHeight=$item.outerHeight();

                    if($itemHeight>$maxHeight){

                        $maxHeight=$itemHeight;

                    }

                    aux++;

                });

                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:

            $('#imageDescription p').hide();

            $('#imageDescription p').html( env.params.arrLabels[step] );

            $('#imageDescription p').show('slow');

            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);