// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Author: Ritesh Agrawal
Inspriation: Will Stuckey's star rating system (http://sandbox.wilstuckey.com/jquery-ratings/)
Demonstration: http://php.scripts.psu.edu/rja171/widgets/rating.php
Usage: $('#rating').rating('www.url.to.post.com', {maxvalue:5, curvalue:0});

arguments
url : required -- post changes to 
options
	maxvalue: number of stars
	curvalue: number of selected stars
	

************************************************/

var lastRatingSettings;
jQuery.fn.rating = function(url, options) {
	
	if(url == null) return;
	
	var settings = {
		url	   : url, // post changes to 
		maxvalue  : 5,   // max number of stars
		curvalue  : 2,	// number of selected stars
		disabled  : 0,
		cancel    : false,
		success   : null
	};
	
	if(options) {
	   jQuery.extend(settings, options);
	};
	//jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
   
   
  var container = jQuery(this);
  container.addClass('star-rating-processed');
  settings.element = container;
	
	jQuery.extend(container, {
			averageRating: settings.curvalue,
			url: settings.url
		});

	for(var i= 0; i <= settings.maxvalue ; i++){
		var size = i
		if (i == 0) {
			if(settings.cancel == true){
				 var div = '<div class="cancel"><a href="#0" title="Cancel Rating">Cancel Rating</a></div>';
				 container.append(div);
			}
		} 
		else {
			 var div = '<div class="star"><a href="#'+i+'" title="Give it '+i+'/'+size+'">'+i+'</a></div>';
			 container.append(div);
		}
	}
	
	var stars = jQuery(container).children('.star');
	var cancel = jQuery(container).children('.cancel');
	
	if(!settings.disabled)
	{
		stars
				.mouseover(function(){
					event.drain();
					event.fill(this);
				})
				.mouseout(function(){
					event.drain();
					event.reset();
				})
				.focus(function(){
					event.drain();
					event.fill(this)
				})
				.blur(function(){
					event.drain();
					event.reset();
				});
	
		stars.click(function(){
			if(settings.maxvalue > 1){
				settings.curvalue = stars.index(this) + 1;
				settings.disabled = true;
				lastRatingSettings = settings;
				jQuery.post(container.url, {
					"rating": jQuery(this).children('a')[0].href.split('#')[1] 
				},function(response){ 
					 // check callback function
					 if(lastRatingSettings.success){
					 	lastRatingSettings.success.apply(this, [lastRatingSettings.curvalue, response]);
					 }
				});
				return false;
			}
			else if(settings.maxvalue == 1){
				settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
				$(this).toggleClass('on');
				jQuery.post(container.url, {
					"rating": jQuery(this).children('a')[0].href.split('#')[1] 
				});
				return false;
			}
			return true;
		});
	}
	else
	{
		stars.click(function(e){
			e.preventDefault();
			return false;
		});
	}

	// cancel button events
	if(cancel.get(0)){
		cancel
			.mouseover(function(){
				event.drain();
				jQuery(this).addClass('on')
			})
			.mouseout(function(){
				event.reset();
				jQuery(this).removeClass('on')
			})
			.focus(function(){
				event.drain();
				jQuery(this).addClass('on')
			})
			.blur(function(){
				event.reset();
				jQuery(this).removeClass('on')
			});
		
		// click events.
		cancel.click(function(){
			event.drain();
			settings.curvalue = 0;
			jQuery.post(container.url, {
				"rating": jQuery(this).children('a')[0].href.split('#')[1] 
			});
			return false;
		});
	}
		
	var event = {
		fill: function(el){ // fill to the current mouse position.
			if(settings.disabled) return;
			var index = stars.index(el) + 1;
			stars.find('a').css('width', '100%');
			stars.each(function(i){ if(i < index ) $(this).addClass('hover').children('a').addClass('hover') });
		},
		drain: function() { // drain all the stars.
			stars.filter('.on').removeClass('on');
			stars.filter('.hover').removeClass('hover');
		},
		reset: function(){ // Reset the stars to the default index.
			stars.each(function(i){ if(i < settings.curvalue ) $(this).addClass('on').children('a').addClass('on') });
		}
	}		
	event.reset();
	
	return(this);	

}