/*
 * jQuery Star Rating plugin
 * Version 1.0.0 (10/02/2009)
 * @requires jQuery v1.2.1 or later
 *
 * Copyright (c) 2009 Aleksandar Pavic
 * http://acosonic.com/projects/jquery_star_rating/

USAGE:
	$(  ).starRatingImages(); 	//uses images
		or
	$(  ).starRatingBg(); 		//uses 1 background image
*/
(function($) {

$.fn.starRating = function(options) {

var opts = $.extend({}, $.fn.starRating.defaults, options);

return this.each(function() {
	$this = $(this);
	var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
	var ratingID = $(this).attr('id');			//grab id of element star rating is used on
	if(o.clickable == false) {					//read settings (enabled/disabled) from configuration or starRating object if it's already used
		$.fn.starRating.clickable[ratingID]=false;
	} else if($.fn.starRating.clickable[ratingID] != false) $.fn.starRating.clickable[ratingID] = true;
	if(o.hoverable == false) {					//read settings (enabled/disabled) from configuration or starRating object if it's already used
		$.fn.starRating.hoverable[ratingID]=false;
	} else if($.fn.starRating.hoverable[ratingID] != false) $.fn.starRating.hoverable[ratingID] = true;
	$.fn.starRating.opts[ratingID]=o;			//remember the settings for rate function
	o.rating = Math.round(o.rating);
	$.fn.starRating.drawStars(o.rating,ratingID);
 });
 };
 
// rating function, performs ajax rating
$.fn.starRating.rate = function(val,ratingID) {
	var o = $.fn.starRating.opts[ratingID];
	var paramId = o.paramId;
	var paramValue = o.paramVaue;
	$.get(o.ratingUrl, { 
		paramId : ratingID, 
		paramValue : val
	}, function(data) {
		if(data!='0'){
			$.fn.starRating.clickable[ratingID] = false;
			$.fn.starRating.hoverable[ratingID] = false;
			$("#"+ratingID+"no").html(o.rating);
			$.fn.starRating.updateStars(data,ratingID);
			if(typeof(o.sucess)=='function') o.sucess(ratingID);
		} else if(typeof(o.failure)=='function') o.failure();
		});	
};

$.fn.starRating.drawStars = function(rate,ratingID) {
	var o = $.fn.starRating.opts[ratingID];
	if($.fn.starRating.clickable[ratingID] == true) {
		$this.html("");
	}
	for(var i=0;i<o.ratingStars;i++) {			//create stars for voting
		var j = i+1;
		var star				= document.createElement('img');
		if(j<=rate) star.src 	= o.ratedImage;
		else star.src			= o.basicImage;
		star.id					= ratingID + "StarRating" + j;
		star.alt				= j;
		star.title				= j;
		var $star				= $(star);
		this.star				= $star;
		$this.append($star);
		//add onclick voting functionality if click functionality is enabled
		if($.fn.starRating.clickable[ratingID] == true) {
			$('#'+star.id).click(function() {
						if($.fn.starRating.clickable[ratingID] == true)
							$.fn.starRating.rate($(this).attr('title'),ratingID);	
			});
		}
		//add hover functionality if click functionality is enabled
		if($.fn.starRating.hoverable[ratingID] == true) {
		$('#'+star.id).hover(function() {
		 if($.fn.starRating.hoverable[ratingID] == true) {
			 $("#"+ratingID+"no").html($(this).attr('alt'));
			if($(this).attr("src") == o.basicImage || $(this).attr("src") == o.ratedImage) {
				$(this).attr("src",o.hoverImage);
				$(this).prevAll().attr("src",o.hoverImage);
			} else {
				if($(this).attr('alt')<=rate) { //if you are hovering a rated star
					$(this).attr("src",o.ratedImage);
					$(this).nextAll(function(){
						if($(this).attr('alt')<=rate)$(this).attr("src",o.ratedImage);
						else $(this).attr("src",o.basicImage);
					});
				} else {
					if($(this).attr('alt')>=rate) { //if you are hovering unrated star
					$(this).nextAll().attr("src",o.basicImage);
					}

				}
			}
		 }
		},function() {
				if($.fn.starRating.hoverable[ratingID] == true) {
					if($(this).attr('alt')<=rate) $(this).attr("src",o.ratedImage);
					else $(this).attr("src",o.basicImage);
					}
		});
		}
		
	}
	if(o.showNumber) { //show value as number after the stars ***** 4
		var numb				= document.createElement('p');
		numb.id					= ratingID + "no";
		$this.append(numb);
		$("#"+ratingID+"no").html(o.rating);
	}
}

$.fn.starRating.updateStars = function(rate,ratingID) {
	var o = $.fn.starRating.opts[ratingID];
	$("#"+ratingID+"no").html(rate);
	for(var i=0;i<o.ratingStars;i++) {			
		var j = i+1;
		if(j<=rate) $("#"+ratingID+"StarRating" + j).attr('src',o.ratedImage);
		else $("#"+ratingID+"StarRating" + j).attr('src',o.basicImage);
		}
}
  
  $.fn.starRating.clickable = [];
  $.fn.starRating.hoverable = [];
  $.fn.starRating.opts = {};
  
  $.fn.starRating.defaults = {
	basicImage	: 'star.gif',	
	ratedImage	: 'star_hover.gif',	
	hoverImage	: 'star_blue.gif',
	ratingStars : 5,				//how much stars to draw
	ratingUrl	: 'rate.php',		//url for ajax request which will manage  ratings
	paramValue	: 'rate',			//parameter holding the value of rating ?rate=4
	paramId		: 'id',				//parameter holding the id of rate ?rate=4&id=photo442
	clickable	: true,				//click enabled or disabled
	hoverable	: true,				//hover effect enabled or disabled
	sucess		: null,				//callback on sucessful rating
	failure		: null,				//callback on failure rating
	rating		: 0,				//current rating
	showNumber	: false				//show number after stars
  };

})(jQuery);