/*    07/19/2010
                PikaChoose
        Jquery plugin for photo galleries
    Copyright (C) 2010 Jeremy Fry

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
(function($) {
    /**
     * Creates a slideshow for all matched elements.
     *
     * @example $("#pikame").PikaChoose();
     * @input needed <ul id="pikame"><li><img src="first.jpg"><span>Caption</span></li><li><img src="second.jpg"><span>Caption</span></li></ul>
     *
     * @method PikaChoose
     * @return $
     * @param o {Hash|String} A set of key/value pairs to set as configuration properties or a method name to call on a formerly created instance.
     */
        var defaults = {
                autoPlay: true,
                speed: 5000,
                text: { play: "", stop: "", previous: "Previous", next: "Next" },
                transition:[-1],
                IESafe: true
        };

    $.fn.PikaChoose = function(o) {
                return this.each(function() {
                        $(this).data('pikachoose', new $pc(this, o));
                });
        }

        /**
     * The PikaChoose object.
     *
     * @constructor
     * @class pikachoose
     * @param e {HTMLElement} The element to create the carousel for.
     * @param o {Object} A set of key/value pairs to set as configuration properties.
     * @cat Plugins/PikaChoose
     */
    $.PikaChoose = function(e, o) {
                this.options    = $.extend({}, defaults, o || {});
                this.list       = null;
                this.image      = null;
                this.anchor             = null;
                this.caption    = null;
                this.imgNav             = null;
                this.imgPlay    = null;
                this.imgPrev    = null;
                this.imgNext    = null;
                this.textNext   = null;
                this.textPrev   = null;
                this.previous  = null;
                this.next               = null;
                this.aniDiv             = null;
                this.thumbs             = null;
                this.transition= null;
                this.active             = null;
                this.animating  = false;
                if (e.nodeName == 'UL' || e.nodeName == 'OL') {
            this.list = $(e);
            this.build();
            this.bindEvents();
        }else{
                return;
        }

                var y = 0;
                var x = 0;
                for(var t = 0; t<25;t++)
                {
                        var a = '<div col="'+y+'" row="'+x+'"></div>';
                        this.aniDiv.append(a);
                        y++
                        if(y == 5)
                        {
                                x++;
                                y=0;
                        }
                }

    }//end PikaChoose function(e, o)

    var $pc = $.PikaChoose;
        $pc.fn = $pc.prototype = {
        pikachoose: '4.0.0'
    };

    $pc.fn.extend = $pc.extend = $.extend;

    $pc.fn.extend({
        /**
         * Builds the gallery structure.
         *
         * @method build
         * @return undefined
         */
        build: function() {
                this.step               = 0; //transition step count
        //create the structure for pikachoose
                        this.wrap               = $("<div class='pika-image'></div>").insertBefore(this.list);
                        this.image              = $("<img>").appendTo(this.wrap);
                        this.anchor             = this.image.wrap("<a>").parent();
                        this.imgNav     = $("<div class='pika-imgnav'></div>").insertAfter(this.anchor);
                        this.imgPlay    = $("<a></a>").appendTo(this.imgNav);
                        if(this.options.autoPlay){ this.imgPlay.addClass('pause'); }else{ this.imgPlay.addClass('play'); }
                        this.imgPrev    = $("<a class='previous'></a>").insertAfter(this.imgPlay);
                        this.imgNext    = $("<a class='next'></a>").insertAfter(this.imgPrev);
                        this.caption    = $("<div class='caption'></div>").insertAfter(this.imgNav);
                        this.aniDiv             = $("<div class='animation'></div>").insertAfter(this.caption);
                        this.textNav    = $("<div class='pika-textnav'></div>").insertAfter(this.aniDiv);
                        this.textPrev   = $("<a class='previous'>"+this.options.text.previous+"</a>").appendTo(this.textNav);
                        this.textNext   = $("<a class='next'>"+this.options.text.next+"</a>").appendTo(this.textNav);
                        this.list.addClass('pika-thumbs');
                this.list.children('li').wrapInner("<div class='clip' />");
                        this.thumbs = this.list.find('img');
                        this.active             = this.thumbs.eq(0);

                        //fill in info for first image
                        this.finishAnimating({'source':this.active.attr('ref') || this.active.attr('src'),'caption':this.active.parent().next('span').html(), 'clickThrough':this.active.parent().attr('href') || ""});

                        //process all the thumbnails
                        this.thumbs.each(this.createThumb);
        }, //end setup
        /**
         * proccesses thumbnails
         *
         * @method createThumb
         * @return undefined
         */
        createThumb: function() {
                var self = $(this);
                $(this).hide();
                //store all the data with the image
                $.data(this,'clickThrough',$(this).parent('a').attr('href') || null);
                if($(this).parent('a').length > 0){ $(this).unwrap(); }
                $.data(this,'caption',$(this).next('span').html() || "");
                $(this).next('span').remove();
                $.data(this,'source',$(this).attr('ref') || $(this).attr('src'));
                $.data(this,'order',$("ul li").index($(this).parents('li')));
                //pass data so it can enter the load scope
                var data = $.data(this);
                $('<img />').bind('load',{data:data},function(){
                        //in this scope self refers to the image
                                var img = $(this);
                                var w = img.width();
                                var h = img.height();
                                if(w===0){w = img.attr("width");}
                                if(h===0){h = img.attr("height");}
                                //grab a ratio for image to user defined settings
                                var rw = parseInt(self.parents('.clip').css('width').slice(0,-2))/w;
                                var rh = parseInt(self.parents('.clip').css('height').slice(0,-2))/h;
                                //determine which has the smallest ratio (thus needing
                                //to be the side we use to scale so our whole thumb is filled)
                                var ratio;
                                if(rw<rh){
                                        //we'll use ratio later to scale and not distort
                                        ratio = rh;
                                        var left = ((w*ratio- parseInt(self.parents('.clip').css('width').slice(0,-2)))/2)*-1;
                                        left = Math.round(left);
                                        self.css({left:left});
                                }else{
                                        ratio = rw;
                                        self.css({top:0});
                                }
                                //use those ratios to calculate scale
                                var width = Math.round(w*ratio);
                                var height = Math.round(h*ratio);
                                self.css("position","relative");
                                var imgcss={
                                        width: width+"px",
                                        height: height+"px"
                                };
                                self.css(imgcss);
                                self.hover(
                                        function(){$(this).stop(true,true).fadeTo(250,1);},
                                        function(){if(!$(this).hasClass("active")){$(this).stop(true,true).fadeTo(250,0.4);}}
                                );

                                if(data.order == 0)
                                {
                                        self.fadeTo(250,1);
                                        self.addClass('active');
                                }else{
                                        self.fadeTo(250,0.4);
                                }
                }).attr('src',$(this).attr('src'));
        },//end createThumb
        /**
         * proccesses thumbnails
         *
         * @method bindEvents
         * @return undefined
         */
        bindEvents: function() {
                this.thumbs.bind('click',{self:this},this.imgClick);
                this.imgNext.bind('click',{self:this},this.nextClick);
                this.textNext.bind('click',{self:this},this.nextClick);
                this.imgPrev.bind('click',{self:this},this.prevClick);
                this.textPrev.bind('click',{self:this},this.prevClick);
                this.imgPlay.bind('click',{self:this},this.playClick);
                this.wrap.bind('mouseenter',{self:this},function(e){
                        e.data.self.imgPlay.stop(true,true).fadeIn('fast');
                });
                this.wrap.bind('mouseleave',{self:this},function(e){
                        e.data.self.imgPlay.stop(true,true).fadeOut('fast');
                });
        },//end bind event
        /**
         * handles gallery after aclick occurs. and sets active classes
         *
         * @method imgClick
         * @return undefined
         */
             imgClick: function(e,x) {
                var self = e.data.self;
                if(self.animating){return;}
                        self.caption.fadeOut('slow');
                if(typeof(x) == 'undefined' || x.how != "auto")
                {
                        //arrive here if natural click
                        if(self.options.autoPlay)
                        {
                                self.imgPlay.trigger('click');
                        }
                        }
                self.animating = true;
                self.active.fadeTo(300,0.4).removeClass('active');
                self.active = $(this);
                self.active.addClass('active').fadeTo(200,1);
                var data = $.data(this);
                        $('<img />').bind('load', {self:self,data:data}, function()
                        {
                                //in this scope self referes to the PikaChoose object
                                self.aniDiv.css({height:self.image.height(),width:self.image.width()}).fadeIn('fast');
                                self.aniDiv.children('div').css({'width':'20%','height':'20%','float':'left'});

                                //decide our transition
                                var n = 0;
                                if(self.options.transition[0] == -1)
                                {       //random
                                        n = Math.floor(Math.random()*6);
                                }else{
                                        n = self.options.transition[self.step];
                                        self.step++;
                                        if(self.step >= self.options.transition.length){self.step=0;}
                                }
                                if(self.options.IESafe && $.browser.msie){ n = 0; }
                                self.doAnimation(n,data);

                        }).attr('src',$.data(this).source);//end image preload
             },//end bindEvents


             doAnimation: function(n,data)
             {

                        var self = this; //self in this scope refers to PikaChoose object. Needed for callbacks on animations
                                var aWidth = self.aniDiv.children('div').eq(0).width();
                                var aHeight = self.aniDiv.children('div').eq(0).height();
                                self.aniDiv.children().each(function()
                                {
                                        //position myself absolutely
                                        var div = $(this);
                                        var xOffset = Math.floor(div.parent().width()/5)*div.attr('col');
                                        var yOffset = Math.floor(div.parent().height()/5)*div.attr('row');
                                        div.css({
                                                'background':'url('+data.source+') -'+xOffset+'px -'+yOffset+'px',
                                                'width':'0px',
                                                'height':'0px',
                                                'position':'absolute',
                                                'top':yOffset+'px',
                                                'left':xOffset+'px',
                                                'float':'none'
                                        });
                                });//end ani_divs.children.each

                        switch(n)
                                {
                                        case 0:
                                                //full frame fade
                                                self.aniDiv.height(self.image.height()).hide().css({'background':'url('+data.source+') top left no-repeat'});
                                                self.aniDiv.children('div').hide();
                                                self.aniDiv.fadeIn('slow',function(){
                                                        self.finishAnimating(data);
                                                        self.aniDiv.css({'background':'transparent'});
                                                });

                                                break;
                                        case 1:
                                                self.aniDiv.children().hide().each(function(index)
                                                {
                                                        //animate out as blocks
                                                        var delay = index*30;
                                                        $(this).css({opacity: 0.1}).delay(delay).animate({opacity: 1,"width":aWidth,"height":aHeight},200,'linear',function()
                                                        {
                                                                if($(".animation div").index(this) == 24)
                                                                {
                                                                        self.finishAnimating(data);
                                                                }
                                                        });
                                                });
                                                break;
                                        case 2:
                                                self.aniDiv.children().hide().each(function(index)
                                                {
                                                        var delay = $(this).attr('row')*30;
                                                        $(this).css({opacity:0.1,"width":aWidth}).delay(delay).animate({opacity:1,"height":aHeight},500,'linear',function()
                                                        {
                                                                if($(".animation div").index(this) == 24)
                                                                {
                                                                        self.finishAnimating(data);
                                                                }
                                                        });
                                                });
                                                break;
                                        case 3:
                                                self.aniDiv.children().hide().each(function(index)
                                                {
                                                        var delay = $(this).attr('col')*10;
                                                        aHeight = self.gapper($(this), aHeight);
                                                        $(this).css({opacity:0.1,"height":aHeight}).delay(delay).animate({opacity:1,"width":aWidth},800,'linear',function()
                                                        {
                                                                if($(".animation div").index(this) == 24)
                                                                {
                                                                        self.finishAnimating(data);
                                                                }
                                                        });
                                                });
                                                break;
                                        case 4:
                                                self.aniDiv.children().show().each(function(index)
                                                {
                                                        var delay = index*Math.floor(Math.random()*5)*10;
                                                        aHeight = self.gapper($(this), aHeight);

                                                        if($(".animation div").index(this) == 24)
                                                        {
                                                                delay = 800;
                                                        }
                                                        $(this).css({"height":aHeight,"width":aWidth,"opacity":.01}).delay(delay).animate({"opacity":1},800,function()
                                                        {
                                                                if($(".animation div").index(this) == 24)
                                                                {
                                                                        self.finishAnimating(data);
                                                                }
                                                        });
                                                });
                                                break;
                                        case 5:
                                                //full frame slide
                                                self.aniDiv.height(self.image.height()).hide().css({'background':'url('+data.source+') top left no-repeat'});
                                                self.aniDiv.children('div').hide();
                                                self.aniDiv.css({width:0}).animate({width:self.image.width()},'slow',function(){
                                                        self.finishAnimating(data);
                                                        self.aniDiv.css({'background':'transparent'});
                                                });

                                                break;
                                        case 6:
                                                //fade out then in
                                                self.aniDiv.hide();
                                                self.image.fadeOut('slow',function(){
                                                        self.image.attr('src',data.source).fadeIn('slow',function()
                                                        {
                                                                self.finishAnimating(data);
                                                        });
                                                });

                                                break;
                                }

             },//end doAnimation
             finishAnimating: function(data)
             {
                this.animating = false;
                this.image.attr('src',data.source);
                this.aniDiv.hide();
                this.anchor.attr('href',data.clickThrough);
                this.caption.html(data.caption).fadeIn('slow');
                if(this.options.autoPlay == true)
                {
                        var self = this;
                        this.image.delay(this.options.speed).fadeIn(0,function(){ if(self.options.autoPlay){ self.nextClick(); } });
                }
             },//end finishedAnimating
                 gapper: function(ele, aHeight)
                 {
                        if(ele.attr('row') == 9 && ele.attr('col') == 0)
                        {
                                //last row, check the gap and fix it!
                                var gap = ani_divs.height()-(aHeight*9);
                                return gap;
                        }
                        return aHeight;
                 },
                 nextClick : function(e)
                 {
                        var how = "natural";
                        try{
                                var self = e.data.self;
                        }catch(err)
                        {
                                var self = this;
                                how = "auto";
                        }
                        var next = self.active.parents('li:first').next().find('img');
                        if(next.length == 0){next = self.list.find('img').eq(0);};
                        next.trigger('click',{how:how});
                 },
                 prevClick : function(e)
                 {
                        var self = e.data.self;
                        var prev = self.active.parents('li:first').prev().find('img');
                        if(prev.length == 0){prev = self.list.find('img:last');};
                        prev.trigger('click');
                 },
                 playClick: function(e)
                 {
                        var self = e.data.self;
                        self.options.autoPlay = !self.options.autoPlay;
                        self.imgPlay.toggleClass('play').toggleClass('pause');
                        if(self.options.autoPlay){ self.nextClick(); }
                 }
        }); //end extend

})($);