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

    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 * 16;
        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);
    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 {
            if (!readonly) {
                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>');
    }

    var stars = jQuery(container).find('.star-rating').children('.star');
    stars.click(function() {

    //if (urlitem != null) {
    //    document.getElementById("confirmacaoVoto" + urlitem).innerHTML = "Voto realizado com sucesso.";
    //    }
        
        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 });
            return false;
        }
        else {

            settings.curvalue = stars.index(this) + 1;
            raterValue = jQuery(this).children('a')[0].href.split('#')[1];
            jQuery.post(container.url, { "rating": raterValue }, function(response) {
                container.children('.star-rating-result').html(response)
            });
            return false;
        }
        return true;
    });


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