/**
 * jQuery Ajax Rater Plugin
 *
 * This rater is based on the code Ritesh Agrawal did. Unfortunatly his CSS and the hover technique breaks in some browsers.
 * So i thought, why not use the best CSS star-rater known to man kind and throw it in the mix.
 * I have used the CSS and technique from Komodo Media since it is stable and tested on many, many browsers.
 *
 * This rater compared, has no cancel button. But i think we can live with that :)
 * To avoid conflicts i have changed the function name.
 * 
 * Licensed under The MIT License
 * 
 * @version     1.0
 * @since       03.01.2007
 * @author      Kjell Bublitz <m3nt0r.de@gmail.com
 * @link        http://www.m3nt0r.de/devel/raterDemo/ Demonstration and Documentation
 * @link        http://php.scripts.psu.edu/rja171/widgets/rating.php Based on Ritesh Agrawal Star Rating System
 * @link        http://komodomedia.com/blog/index.php/2007/01/20/css-star-rating-redux/ The Komodo Media CSS Rater Blogpost
 * @license     http://www.opensource.org/licenses/mit-license.php MIT 
 * @package     jQuery Plugins
 * @subpackage  Rater
 */ 

/**
 * Usage: $('#rating').rater('your_servlet', {style:'basic', maxvalue:5, curvalue:0});
 *  
 * @param url The address you want to post the result to. 
 * @param options The style and value attributes
 *
 * Valid options:
 * ---------------------------------------
 *       style:       'basic', 'inline' OR 'small'
 *       maxvalue:    the maximum value / number of stars
 *       curvalue:    the initial value / selected stars
 *       extraparams: extra params to post, like extraparams: { comment_id: 4, user_id: 2 } 
 */

/**
 * This script is not as the original script. It has been modified to work with the Playground framework. 
 */
jQuery.fn.rater = function(url, options)
{
  if(url == null) return;
  var settings = {
    url       : url, // post changes to 
    maxvalue  : 5,   // max number of stars
    curvalue  : 0,    // number of selected stars
    extraparams: null
  };
  
  if(options) { jQuery.extend(settings, options); };
  jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
  
  var container = jQuery(this);
  jQuery.extend(container, { averageRating: settings.curvalue, url: settings.url });

  if(!settings.style || settings.style == null || settings.style == 'basic') {
    var raterwidth = settings.maxvalue * 25;
    var ratingparent = '<ul class="star-rating" style="width:'+raterwidth+'px">';
  }
  if(settings.style == 'small') {
    var raterwidth = settings.maxvalue * 10;
    var ratingparent = '<ul class="star-rating small-star" style="width:'+raterwidth+'px">';
  }
  if(settings.style == 'inline') {
    var raterwidth = settings.maxvalue * 25;
    var ratingparent = '<span class="inline-rating"><ul class="star-rating small-star" style="width:'+raterwidth+'px">';
  }
  container.append(ratingparent);
  
  // create rater
  var starWidth, starIndex, listitems = '';
  var curvalueWidth = Math.floor(100 / settings.maxvalue * settings.curvalue);
  for(var i = 0; i <= settings.maxvalue ; i++) {
    if (i == 0) {
      listitems+='<li class="current-rating" style="width:'+curvalueWidth+'%;">'+settings.curvalue+'/'+settings.maxvalue+'</li>';
    } else {
      starWidth = Math.floor(100 / settings.maxvalue * i);
      starIndex = (settings.maxvalue - i) + 2;
      listitems+='<li class="star"><a href="#'+i+'" title="'+i+'/'+settings.maxvalue +'" style="width:'+starWidth+'%;z-index:'+starIndex+'">'+i+'</a></li>';
    }
  }
  container.find('.star-rating').append(listitems); // i am using find here, because the span wrapped in the small style would break children()
  
  /*if(settings.curvalue > 0) {
    container.find('span.inline-rating').addClass('star-rating-rated');
  } else {*/
    container.find('span.inline-rating').addClass('star-rating-unrated');
    var stars = jQuery(container).find('.star-rating').children('.star');
    stars.click(function()
    {
      if(settings.maxvalue == 1) // on / off
      {
        settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
        jQuery(container).find('.star-rating').children('.current-rating').css({width:(settings.curvalue*100)+'%'});
        $.postJSON(container.url, {rating: settings.curvalue, extraparams: JSON.stringify(settings.extraparams)});
        return false;
      }
      else
      {
        settings.curvalue = stars.index(this) + 1;
        var raterValue = jQuery(this).children('a')[0].href.split('#')[1];
        var params = { "rating": raterValue };
        $.postJSON(container.url, {rating: raterValue, extraparams: JSON.stringify(settings.extraparams)}, {
          success: function(response) {
            if(response.result != 'undefined') {
              container.children('.star-rating-result').html(response.result);
            }
            // quick fix
            container.html('');
            container.rater(url, {
              maxvalue: settings.maxvalue,
              curvalue: raterValue,
              style: 'inline',
              extraparams: settings.extraparams
            });
          }
        });
        return false;
      }
      return true;
    });
  //}

  if(settings.maxvalue > 1) // add a container for the ajax result
  {
    container.append('<span class="star-rating-result"></span>'); 
  }

  return this; // strict warning: anonymous function does not always return a value. fix?
}