/**
 * RabidRatings - Simple and Pretty Ratings for Everyone
 * JavaScript functionality requires MooTools version 1.2 <http://www.mootools.net>.
 *
 * Full package available at <http://widgets.rabidlabs.net/ratings>.
 * django version at http://code.google.com/p/djang-rabid-ratings/
 *
 * NOTE: The included JavaScript WILL ONLY WORK WITH MOOTOOLS.  It will not work if any other JavaScript
 * framework is present on the page.
 *
 * Current MooTools version: 1.2
 *
 * @author Michelle Steigerwalt <http://www.msteigerwalt.com>
 * @copyright 2007, 2008 Michelle Steigerwalt, 2008 Darrel Herbst
 * @license LGPL 2.1 <http://creativecommons.org/licenses/LGPL/2.1/>
 */

var RabidRatings = new Class({

    Implements: Options,

    options: {
        url: '/rate/',
        leftMargin: 0,  /* The width in pixels of the margin before the stars. */
        starWidth: 18,  /* The width in pixels of each star. */
        starMargin: 4,  /* The width in pixels between each star. */
        scale: 5,       /* It's a five-star scale. */
        isVotable: true,
        snap: 1         /* Will snap to the nearest star (can be made a decimal, too). */
    },

    initialize: function(options) {

        this.setOptions(options);
        var activeColor = this.options.activeColor;
        var votedColor  = this.options.votedColor;
        var fillColor   = this.options.fillColor;

        // Capire se attivare o meno il voto
        //il campo è inserito nei templates in cui c'è solo visualizzazione
        //tipo infomotori/video_home.html db template
        if ($('v')) {
            this.options.isVotable = false;
        };

        $$('.rabidRating').each(function(el) {
        //Does this if the browser is NOT IE6. IE6 users don't deserve fancy ratings. >:(
        if (!Browser.Engine.trident4) {
            el.id = el.getAttribute('id');
            el.wrapper = el.getElement('.wrapper');
            el.textEl = el.getElement('.ratingText');
            el.offset = el.getPosition().x;
            el.fill = el.getElement('.ratingFill');
            el.starPercent = this.getStarPercent(el.id);
            el.ratableId   = this.getRatableId(el.id);

            this.fillVote(el.starPercent, el);
            el.currentFill = this.getFillPercent(el.starPercent);
            el.morphFx = new Fx.Morph(el.fill, {'link':'chain'});
            el.widthFx = new Fx.Tween(el.fill, {link: 'chain'});
            el.mouseCrap = function(e) {
                var fill = e.client.x - el.offset;
                var fillPercent = this.getVotePercent(fill);
                var step = (100 / this.options.scale) * this.options.snap;
                var nextStep = Math.floor(fillPercent / step) + 1;
                this.fillVote(nextStep * step, el);
            }.bind(this);

            if (this.options.isVotable) {

                el.wrapper.addEvent('mouseenter', function(e){
                    el.morphFx.start('.rabidRating .ratingActive');
                    el.wrapper.addEvent('mousemove', el.mouseCrap);
                });

                el.wrapper.addEvent('mouseleave', function(e){
                    el.removeEvent(el.mouseCrap);
                    el.morphFx.start('.rabidRating .ratingFill');
                    el.widthFx.start('width', el.currentFill);
                });

                el.wrapper.addEvent('click', function(e){
                    el.currentFill = el.newFill;
                    el.morphFx.start('.rabidRating .ratingVoted');
                    el.wrapper.removeEvents();
                    el.addClass('ratingVoted');
                    el.textEl.addClass('loading');
                    var votePercent = this.getVotePercent(el.newFill);
                    final_url = this.options.url + el.ratableId + "/"
                    if (this.options.url != null) {
                        var req = new Request({
                            url: final_url,
                            onComplete: el.updateText
                        }).post({
                            vote: votePercent,
                            id: el.ratableId
                        });
                    }
                }
                .bind(this));

            };

            el.updateText = function(text) {
                error = text.split('ERROR:')[1];
                el.textEl.removeClass('loading');
                if (error) { el.showError(error); return false; }
                el.textEl.set('text', text);
            };

            el.showError = function(error) {
                el.textEl.addClass('ratingError');
                oldTxt = el.textEl.get('text');
                el.textEl.set('text', error);
                (function() {
                    el.textEl.set('text', oldTxt);
                    el.textEl.removeClass('ratingError');
                }).delay(1000);
            };
        } else {
            //Replaces all the fancy with a text description of the votes for IE6.
            //If you want IE6 users to have something fancier to look at, add it here.
            var plain = el.getElement('.ratingText').inject(el, 'before');
            el.remove();
        }
        }.bind(this));
    },

    fillVote: function(percent, el) {
        el.newFill = this.getFillPercent(percent);
        if (this.getVotePercent(el.newFill) > 100) { el.newFill = this.getFillPercent(100); }
        el.fill.setStyle('width', el.newFill);
    },

    getStarPercent: function(id) {
        /* Format = anyStringHere-<id>-<float(currentStars)>_(scale);
         * Example: rabidRatings-5-3_5 //Primary key id = 5, 3/5 stars. */
        var stars = id.match(/(\d*)-(\d*\.?\d+)_(\d*\.?\d+)$/);
        var ratableId = stars[1].toFloat();
        var score = stars[2].toFloat();
        var scale = stars[3].toFloat();
        var percent =  (score / scale) * 100;
        return percent;
    },

    getFillPercent: function (starPercent) {
        return (starPercent/100)*((this.options.starWidth+this.options.starMargin)*this.options.scale) + this.options.leftMargin;
    },

    getVotePercent: function(divPosition) {
        var starsWidth = (this.options.starWidth+this.options.starMargin)*this.options.scale;
        var offset = this.options.leftMargin;
        var starPosition = divPosition - this.options.leftMargin;
        var percent = (starPosition / starsWidth * 100).round(2);
        return percent;
    },

    getRatableId: function(id) {
        var stars = id.match(/(\d*)-(\d*\.?\d+)_(\d*\.?\d+)$/);
        return stars[1];
    }

});

window.addEvent('domready', function(e) {
    var rating = new RabidRatings();
});