/*
 * 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='/imdeo/js/loading.gif' alt='' />";
    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='/imdeo/js/loading.gif' alt='' />";
    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='Fermer la fen&ecirc;tre'><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='Fermer la fen&ecirc;tre'>Fermer la fen&ecirc;tre</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='Fermer la fen&ecirc;tre'>Fermer la fen&ecirc;tre</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'>Fermer la fen&ecirc;tre</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;
}