/*
 * Smoothbox v20070814 by Boris Popoff (http://gueschla.com)
 *
 * Based on Cody Lindley's Thickbox, MIT License
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

// on page load call TB_init
window.addEvent('domready', TB_init);

// prevent javascript error before the content has loaded
TB_WIDTH = 0;
TB_HEIGHT = 0;
var TB_doneOnce = 0 ;

// add smoothbox to href elements that have a class of .smoothbox
function TB_init(){
   $$("a.smoothbox").each(function(el){el.onclick=TB_bind});
}

function TB_bind(event) {
   var event = new Event(event);
   // stop default behaviour
   event.preventDefault();
   // remove click border
   this.blur();
   // get caption: either title or name attribute
   var caption = this.title || this.name || "";
   // get rel attribute for image groups
   var group = this.rel || false;
   // display the box for the elements href
   TB_show(caption, this.href, group);
   this.onclick=TB_bind;
   return false;
}


// called when the user clicks on a smoothbox link
function TB_show(caption, url, rel) {

   // create iframe, overlay and box if non-existent

   if ( !$("TB_overlay") )
   {
      new Element('iframe').setProperty('id', 'TB_HideSelect').injectInside(document.body);
      $('TB_HideSelect').setOpacity(0);
      new Element('div').setProperty('id', 'TB_overlay').injectInside(document.body);
      $('TB_overlay').setOpacity(0);
      TB_overlaySize();
      new Element('div').setProperty('id', 'TB_load').injectInside(document.body);
      $('TB_load').innerHTML = "<img src='../images/loading.gif' />";
      TB_load_position();
      new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut}).start(0,0.6);
   }
   
   if ( !$("TB_load") )
   {
      new Element('div').setProperty('id', 'TB_load').injectInside(document.body);
      $('TB_load').innerHTML = "<img src='images/spacer.gif' />";
      TB_load_position();
   }
   
   if ( !$("TB_window") )
   {
      new Element('div').setProperty('id', 'TB_window').injectInside(document.body);
      $('TB_window').setOpacity(0);
   }
   
   $("TB_overlay").onclick=TB_remove;
   window.onscroll=TB_positionEffect;

   // check if a query string is involved
   var baseURL = url.match(/(.+)?/)[1] || url;

   // regex to check if a href refers to an image
   var imageURL = /\.(jpe?g|png|gif|bmp)/gi;

   // check for images
   if ( baseURL.match(imageURL) ) {
      var dummy = { caption: "", url: "", html: "" };
      
      var prev = dummy,
         next = dummy,
         imageCount = "";
         
      // if an image group is given
      if ( rel ) {
         function getInfo(image, id, label) {
            return {
               caption: image.title,
               url: image.href,
               html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"
            }
         }
      
         // find the anchors that point to the group
         var imageGroup = [] ;
         $$("a.smoothbox").each(function(el){
            if (el.rel==rel) {imageGroup[imageGroup.length] = el ;}
         })

         var foundSelf = false;
         
         // loop through the anchors, looking for ourself, saving information about previous and next image
         for (var i = 0; i < imageGroup.length; i++) {
            var image = imageGroup[i];
            var urlTypeTemp = image.href.match(imageURL);
            
            // look for ourself
            if ( image.href == url ) {
               foundSelf = true;
               imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);
            } else {
               // when we found ourself, the current is the next image
               if ( foundSelf ) {
                  next = getInfo(image, "next", "Next &gt;");
                  // stop searching
                  break;
               } else {
                  // didn't find ourself yet, so this may be the one before ourself
                  prev = getInfo(image, "prev", "&lt; Prev");
               }
            }
         }
      }
      
      imgPreloader = new Image();
      imgPreloader.onload = function() {
         imgPreloader.onload = null;

         // Resizing large images
         var x = window.getWidth() - 150;
         var y = window.getHeight() - 150;
         var imageWidth = imgPreloader.width;
         var imageHeight = imgPreloader.height;
         if (imageWidth > x) {
            imageHeight = imageHeight * (x / imageWidth); 
            imageWidth = x; 
            if (imageHeight > y) { 
               imageWidth = imageWidth * (y / imageHeight); 
               imageHeight = y; 
            }
         } else if (imageHeight > y) { 
            imageWidth = imageWidth * (y / imageHeight); 
            imageHeight = y; 
            if (imageWidth > x) { 
               imageHeight = imageHeight * (x / imageWidth); 
               imageWidth = x;
            }
         }
         // End Resizing
         
         // TODO don't use globals
         TB_WIDTH = imageWidth + 30;
         TB_HEIGHT = imageHeight + 60;
         
         // TODO empty window content instead
         $("TB_window").innerHTML += "<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>";
         
         $("TB_closeWindowButton").onclick = TB_remove;
         
         function buildClickHandler(image) {
            return function() {
               $("TB_window").remove();
               new Element('div').setProperty('id', 'TB_window').injectInside(document.body);
               
               TB_show(image.caption, image.url, rel);
               return false;
            };
         }
         var goPrev = buildClickHandler(prev);
         var goNext = buildClickHandler(next);
         if ( $('TB_prev') ) {
            $("TB_prev").onclick = goPrev;
         }
         
         if ( $('TB_next') ) {      
            $("TB_next").onclick = goNext;
         }
         
         document.onkeydown = function(event) {
            var event = new Event(event);
            switch(event.code) {
            case 27:
               TB_remove();
               break;
            case 190:
               if( $('TB_next') ) {
                  document.onkeydown = null;
                  goNext();
               }
               break;
            case 188:
               if( $('TB_prev') ) {
                  document.onkeydown = null;
                  goPrev();
               }
               break;
            }
         }
         
         // TODO don't remove loader etc., just hide and show later
         $("TB_ImageOff").onclick = TB_remove;
         TB_position();
         TB_showWindow();
      }
      imgPreloader.src = url;
      
   } else { //code to show html pages
      
      var queryString = url.match(/\?(.+)/)[1];
      var params = TB_parseQuery( queryString );
      
      TB_WIDTH = (params['width']*1) + 30;
      TB_HEIGHT = (params['height']*1) + 40;

      var ajaxContentW = TB_WIDTH - 30,
         ajaxContentH = TB_HEIGHT - 45;
      
      if(url.indexOf('TB_iframe') != -1){          
         urlNoQuery = url.split('TB_');      
         $("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' onload='TB_showWindow()'> </iframe>";
      } else {
         $("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>";
      }
            
      $("TB_closeWindowButton").onclick = TB_remove;
      
         if(url.indexOf('TB_inline') != -1){ 
            $("TB_ajaxContent").innerHTML = ($(params['inlineId']).innerHTML);
            TB_position();
            TB_showWindow();
         }else if(url.indexOf('TB_iframe') != -1){
            TB_position();
            if(frames['TB_iframeContent'] == undefined){//be nice to safari
               $(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });
               TB_showWindow();
            }
         }else{
            var handlerFunc = function(){
               TB_position();
               TB_showWindow();
            };
            var myRequest = new Ajax(url, {method: 'get',update: $("TB_ajaxContent"),onComplete: handlerFunc}).request();
         }
   }

   window.onresize=function(){ TB_position(); TB_load_position(); TB_overlaySize();}  
   
   document.onkeyup = function(event){    
      var event = new Event(event);
      if(event.code == 27){ // close
         TB_remove();
      }  
   }
      
}

//helper functions below

function TB_showWindow(){
   //$("TB_load").remove();
   //$("TB_window").setStyles({display:"block",opacity:'0'});
   
   if (TB_doneOnce==0) {
      TB_doneOnce = 1;
      var myFX = new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){if ($('TB_load')) { $('TB_load').remove();}} }).start(0,1);
   } else {
      $('TB_window').setStyle('opacity',1);
      if ($('TB_load')) { $('TB_load').remove();}
   }
}

function TB_remove() {
   $("TB_overlay").onclick=null;
   document.onkeyup=null;
   document.onkeydown=null;
   
   if ($('TB_imageOff')) $("TB_imageOff").onclick=null;
   if ($('TB_closeWindowButton')) $("TB_closeWindowButton").onclick=null;
   if ( $('TB_prev') ) { $("TB_prev").onclick = null; }
   if ( $('TB_next') ) { $("TB_next").onclick = null; }

   new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_window').remove();} }).start(1,0);
   new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_overlay').remove();} }).start(0.6,0);

   window.onscroll=null;
   window.onresize=null;   
   
   $('TB_HideSelect').remove();
   TB_init();
   TB_doneOnce = 0;
   return false;
}

function TB_position() {
   $("TB_window").setStyles({width: TB_WIDTH+'px', 
             left: (window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',
             top: (window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});
}

function TB_positionEffect() {
   new Fx.Styles('TB_window', {duration: 75, transition: Fx.Transitions.sineInOut}).start({
      'left':(window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',
      'top':(window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});
}

function TB_overlaySize(){
   // we have to set this to 0px before so we can reduce the size / width of the overflow onresize 
   $("TB_overlay").setStyles({"height": '0px', "width": '0px'});
   $("TB_HideSelect").setStyles({"height": '0px', "width": '0px'});
   $("TB_overlay").setStyles({"height": window.getScrollHeight()+'px', "width": window.getScrollWidth()+'px'});
   $("TB_HideSelect").setStyles({"height": window.getScrollHeight()+'px',"width": window.getScrollWidth()+'px'});
}

function TB_load_position() {
   if ($("TB_load")) { $("TB_load").setStyles({left: (window.getScrollLeft() + (window.getWidth() - 56)/2)+'px', top: (window.getScrollTop() + ((window.getHeight()-20)/2))+'px',display:"block"}); }
}

function TB_parseQuery ( query ) {
   // return empty object
   if( !query )
      return {};
   var params = {};
   
   // parse query
   var pairs = query.split(/[;&]/);
   for ( var i = 0; i < pairs.length; i++ ) {
      var pair = pairs[i].split('=');
      if ( !pair || pair.length != 2 )
         continue;
      // unescape both key and value, replace "+" with spaces in value
      params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');
   }
   return params;
}