/*!
 * jQuery UI Stars v3.0.1
 * http://plugins.jquery.com/project/Star_Rating_widget
 *
 * Copyright (c) 2010 Marek "Orkan" Zajac (orkans@gmail.com)
 * Dual licensed under the MIT and GPL licenses.
 * http://docs.jquery.com/License
 *
 * $Rev: 164 $
 * $Date:: 2010-05-01 #$
 * $Build: 35 (2010-05-01)
 *
 * Depends:
 *	jquery.ui.core.js
 *	jquery.ui.widget.js
 *
 */
(function($) {

    $.widget('ui.stars', {
        options: {
            inputType: 'radio', // [radio|select]
            split: 0, // decrease number of stars by splitting each star into pieces [2|3|4|...]
            disabled: false, // set to [true] to make the stars initially disabled
            cancelTitle: 'Cancel Rating',
            cancelValue: 0, // default value of Cancel btn.
            cancelShow: true,
            disableValue: true, // set to [false] to not disable the hidden input when Cancel btn is clicked, so the value will present in POST data.
            oneVoteOnly: false,
            showTitles: false,
            captionEl: null, // jQuery object - target for text captions 
            callback: null, // function(ui, type, value, event)

            /*
		 * CSS classes
		 */
            starWidth: 16, // width of the star image
            cancelClass: 'ui-stars-cancel',
            starClass: 'ui-stars-star',
            starOnClass: 'ui-stars-star-on',
            starHoverClass: 'ui-stars-star-hover',
            starDisabledClass: 'ui-stars-star-disabled',
            cancelHoverClass: 'ui-stars-cancel-hover',
            cancelDisabledClass: 'ui-stars-cancel-disabled'
        },
	
        _create: function() {
            var self = this, o = this.options, starId = 0;
            this.element.data('former.stars', this.element.html());

            o.isSelect = o.inputType == 'select';
            this.$form = $(this.element).closest('form');
            this.$selec = o.isSelect ? $('select', this.element)  : null;
            this.$rboxs = o.isSelect ? $('option', this.$selec)   : $(':radio', this.element);

            /*
		 * Map all inputs from $rboxs array to Stars elements
		 */
            this.$stars = this.$rboxs.map(function(i)
            {
                var el = {
                    value:      this.value,
                    title:      (o.isSelect ? this.text : this.title) || this.value,
                    isDefault:  (o.isSelect && this.defaultSelected) || this.defaultChecked
                };

                if(i==0) {
                    o.split = typeof o.split != 'number' ? 0 : o.split;
                    o.val2id = [];
                    o.id2val = [];
                    o.id2title = [];
                    o.name = o.isSelect ? self.$selec.get(0).name : this.name;
                    o.disabled = o.disabled || (o.isSelect ? $(self.$selec).attr('disabled') : $(this).attr('disabled'));
                }

                /*
			 * Consider it as a Cancel button?
			 */
                if(el.value == o.cancelValue) {
                    o.cancelTitle = el.title;
                    return null;
                }

                o.val2id[el.value] = starId;
                o.id2val[starId] = el.value;
                o.id2title[starId] = el.title;

                if(el.isDefault) {
                    o.checked = starId;
                    o.value = o.defaultValue = el.value;
                    o.title = el.title;
                }

                var $s = $('<div/>').addClass(o.starClass);
                var $a = $('<a/>').attr('title', o.showTitles ? el.title : '').text(el.value);

                /*
			 * Prepare division settings
			 */
                if(o.split) {
                    var oddeven = (starId % o.split);
                    var stwidth = Math.floor(o.starWidth / o.split);
                    $s.width(stwidth);
                    $a.css('margin-left', '-' + (oddeven * stwidth) + 'px');
                }

                starId++;
                return $s.append($a).get(0);
            });

            /*
		 * How many Stars?
		 */
            o.items = starId;

            /*
		 * Remove old content
		 */
            o.isSelect ? this.$selec.remove() : this.$rboxs.remove();

            /*
		 * Append Stars interface
		 */
            this.$cancel = $('<div/>').addClass(o.cancelClass).append( $('<a/>').attr('title', o.showTitles ? o.cancelTitle : '').text(o.cancelValue) );
            o.cancelShow &= !o.disabled && !o.oneVoteOnly;
            o.cancelShow && this.element.append(this.$cancel);
            this.element.append(this.$stars);

            /*
		 * Initial selection
		 */
            if(o.checked === undefined) {
                o.checked = -1;
                o.value = o.defaultValue = o.cancelValue;
                o.title = '';
            }
		
            /*
		 * The only FORM element, that has been linked to the stars control. The value field is updated on each Star click event
		 */
            this.$value = $("<input type='hidden' name='"+o.name+"' value='"+o.value+"' />");
            this.element.append(this.$value);


            /*
		 * Attach stars event handler
		 */
            this.$stars.bind('click.stars', function(e) {
                if(!o.forceSelect && o.disabled) return false;

                var i = self.$stars.index(this);
                o.checked = i;
                o.value = o.id2val[i];
                o.title = o.id2title[i];
                self.$value.attr({
                    disabled: o.disabled ? 'disabled' : '', 
                    value: o.value
                    });

                fillTo(i, false);
                self._disableCancel();

                !o.forceSelect && self.callback(e, 'star');
            })
            .bind('mouseover.stars', function() {
                if(o.disabled) return false;
                var i = self.$stars.index(this);
                fillTo(i, true);
            })
            .bind('mouseout.stars', function() {
                if(o.disabled) return false;
                fillTo(self.options.checked, false);
            });


            /*
		 * Attach cancel event handler
		 */
            this.$cancel.bind('click.stars', function(e) {
                if(!o.forceSelect && (o.disabled || o.value == o.cancelValue)) return false;

                o.checked = -1;
                o.value = o.cancelValue;
                o.title = '';
			
                self.$value.val(o.value);
                o.disableValue && self.$value.attr({
                    disabled: 'disabled'
                });

                fillNone();
                self._disableCancel();

                !o.forceSelect && self.callback(e, 'cancel');
            })
            .bind('mouseover.stars', function() {
                if(self._disableCancel()) return false;
                self.$cancel.addClass(o.cancelHoverClass);
                fillNone();
                self._showCap(o.cancelTitle);
            })
            .bind('mouseout.stars', function() {
                if(self._disableCancel()) return false;
                self.$cancel.removeClass(o.cancelHoverClass);
                self.$stars.triggerHandler('mouseout.stars');
            });


            /*
		 * Attach onReset event handler to the parent FORM
		 */
            this.$form.bind('reset.stars', function(){
                !o.disabled && self.select(o.defaultValue);
            });


            /*
		 * Clean up to avoid memory leaks in certain versions of IE 6
		 */
            $(window).unload(function(){
                self.$cancel.unbind('.stars');
                self.$stars.unbind('.stars');
                self.$form.unbind('.stars');
                self.$selec = self.$rboxs = self.$stars = self.$value = self.$cancel = self.$form = null;
            });


            /*
		 * Star selection helpers
		 */
            function fillTo(index, hover) {
                if(index != -1) {
                    var addClass = hover ? o.starHoverClass : o.starOnClass;
                    var remClass = hover ? o.starOnClass    : o.starHoverClass;
                    self.$stars.eq(index).prevAll('.' + o.starClass).andSelf().removeClass(remClass).addClass(addClass);
                    self.$stars.eq(index).nextAll('.' + o.starClass).removeClass(o.starHoverClass + ' ' + o.starOnClass);
                    self._showCap(o.id2title[index]);
                }
                else fillNone();
            };
            function fillNone() {
                self.$stars.removeClass(o.starOnClass + ' ' + o.starHoverClass);
                self._showCap('');
            };


            /*
		 * Finally, set up the Stars
		 */
            this.select(o.value);
            o.disabled && this.disable();

        },

        /*
	 * Private functions
	 */
        _disableCancel: function() {
            var o = this.options, disabled = o.disabled || o.oneVoteOnly || (o.value == o.cancelValue);
            if(disabled)  this.$cancel.removeClass(o.cancelHoverClass).addClass(o.cancelDisabledClass);
            else          this.$cancel.removeClass(o.cancelDisabledClass);
            this.$cancel.css('opacity', disabled ? 0.5 : 1);
            return disabled;
        },
        _disableAll: function() {
            var o = this.options;
            this._disableCancel();
            if(o.disabled)  this.$stars.filter('div').addClass(o.starDisabledClass);
            else            this.$stars.filter('div').removeClass(o.starDisabledClass);
        },
        _showCap: function(s) {
            var o = this.options;
            if(o.captionEl) o.captionEl.text(s);
        },

        /*
	 * Public functions
	 */
        value: function() {
            return this.options.value;
        },
        select: function(val) {
            var o = this.options, e = (val == o.cancelValue) ? this.$cancel : this.$stars.eq(o.val2id[val]);
            o.forceSelect = true;
            e.triggerHandler('click.stars');
            o.forceSelect = false;
        },
        selectID: function(id) {
            var o = this.options, e = (id == -1) ? this.$cancel : this.$stars.eq(id);
            o.forceSelect = true;
            e.triggerHandler('click.stars');
            o.forceSelect = false;
        },
        enable: function() {
            this.options.disabled = false;
            this._disableAll();
        },
        disable: function() {
            this.options.disabled = true;
            this._disableAll();
        },
        destroy: function() {
            this.$form.unbind('.stars');
            this.$cancel.unbind('.stars').remove();
            this.$stars.unbind('.stars').remove();
            this.$value.remove();
            this.element.unbind('.stars').html(this.element.data('former.stars')).removeData('stars');
            return this;
        },
        callback: function(e, type) {
            var o = this.options;
            var id = this.element.context.firstElementChild.value;
            o.callback && o.callback(this, type, o.value, id, e);
            o.oneVoteOnly && !o.disabled && this.disable();
        }
    });

    $.extend($.ui.stars, {
        version: '3.0.1'
    });

})(jQuery);