/**
 * 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
 */
jQuery.fn.rater = function(url, id, options)
{
        if(url == null) return;
        var settings = {
                url       : url, // post changes to
                maxvalue  : 5,   // max number of stars
                curvalue  : 0,
                id : id
        };

        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 * 10;
                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);
//        alert(curvalueWidth);
        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.maxvalue > 1) // add a container for the ajax result
        {
                container.append('<span class="star-rating-result"></span>');
        }

       if (url){

        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)+'%'});
                        jQuery.post(container.url, { "rating": settings.curvalue, "id": settings.id });
                        return false;
                }
                else
                {

                        settings.curvalue = stars.index(this) + 1;
                        raterValue = jQuery(this).children('a')[0].href.split('#')[1];
                        var raterValue;
                        jQuery.post(container.url, { "rating": raterValue, "id": settings.id }, function(response){
                                container.find('.star-rating').children('.current-rating').css({width:(Math.floor(100 / settings.maxvalue * raterValue))+'%'});
//                                alert(Math.floor(100 / settings.maxvalue * raterValue));
                                container.children('.star-rating-result').html(response)
                        });
                        return false;
                }
                return true;
        });
      }

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