/*
 *
 * Copyright (c) 2006-2010 Joan Piedra (http://joanpiedra.com)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 * 
 */
(function($) {

/*
 * Converts image and link elements to thumbnails
 *
 * @name     $.fn.thumbs
 * @author   Joan Piedra (http://joanpiedra.com)
 * @example  $('.thumb').thumbs();
 *
 */
$.fn.thumbs = function(options) {
 var $thumbs = this;
 
 if (options == 'destroy') {
  return Thumbs.destroy($thumbs);
 }
 
 if( $thumbs.data('thumbs') ) {
  return $thumbs;
 }
 
 var center = {},
 defaults = {
  center: true,
  classNames: {
   center: 'thumb-center',
   container: 'thumb-container',
   icon: 'thumb-icon',
   img: 'thumb-img',
   inner: 'thumb-inner',
   strip: 'thumb-strip'
  },
  html: '<span class="%container%"><span class="%inner%"><span class="%img%"></span><span class="%strip%">%strip_content%</span><span class="%icon%"></span></span></span>',
  strip: false
 };
 
 options = $.extend(true, {}, defaults, options);
 
 return $thumbs.each(function(){
  var $thumb = $(this),
  c = options.classNames,
  clone = $thumb.clone(true),
  html = new String(options.html),
  centered = false,
  strip = '';
  
  for (className in c) {
   var newClassName = c[className];
   
   if ( options.center && !centered && className == 'container' ) {
    newClassName = c.container + ' ' + c.center;
    centered = true;
   }
   
   html = html.replace('%' + className + '%', newClassName);
  }
  
  if (options.strip) {
   strip = $thumb.is('img') ? $thumb.attr('alt') : $thumb.find('img').attr('alt');
   strip = strip != undefined ? strip : $thumb.attr('title');
   strip = strip != undefined ? strip : '';
  }
  
  html = html.replace('%strip_content%', strip);
  
  $thumb.wrap( html );
  
  if (options.center) {
   Thumbs.centerImg( $thumb );
  }
  
  var data = {
   'container': $thumb.parents('.' + c.container),
   'raw': clone
  };
  
  $thumb.data('thumbs', data);
 });
};


var Thumbs = {

 /*
  * Private: Absolute positions the image in the center of the thumbnail frame
  *
  * @name     thumbs.centerImg
  * @author   Joan Piedra (http://joanpiedra.com)
  * @example  Thumbs.centerImg($thumb);
  *
  */
 centerImg: function($thumb) {
  var $img = $thumb.is('img') ? $thumb : $thumb.find('img'),
  css = {
   leftaa: '-' + ( parseInt( $img.css('width') ) / 2 ) + 'px',
   topaa: '-' + ( parseInt( $img.css('height') ) / 2 ) + 'px'
  };
   
   var iw = $img.width();
   var ih = $img.height();
   var maxdim = 150;
   //console.log(iw + ' x ' + ih);
    
   var scale;
   var niw=iw;
   var nih=ih;
   
   if (maxdim < iw || maxdim < ih) {
     scale = maxdim / ih;
     if (iw > ih) {
       scale = maxdim / iw;
     }
     niw = scale * iw;
     nih = scale * ih;
     if (niw < 1) {
      niw = 1;
     }
     if (nih < 1) {
      nih = 1;
     }
   }
   
   $img.width(niw);
   $img.height(nih);
   $img.css = {
   	width: niw + 'px',
   	height: nih + 'px'
   };
   
  /*css = {
   width: parseInt($img.css('width')) + 'px',
   height: parseInt($img.css('height')) + 'px'
  };
 
  $img.css( css );
*/
 
  return $thumb;
 },

 /*
  * Private: Removes all the added thumbnail html
  *
  * @name     thumbs.destroy
  * @author   Joan Piedra (http://joanpiedra.com)
  * @example  Thumbs.destroy($thumbs);
  *
  */
 destroy: function($thumbs) {
  $thumbs.each(function(index) {
   var $thumb = $(this),
   data = $thumb.data('thumbs');
   
   if (!data) {
    return;
   }
   
   data.container.after(data.raw).remove();
  });
 }

}

})(jQuery);