// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Second Version: 17 May, 2007
Author: Ritesh Agrawal (http://php.scripts.psu.edu/rja171/widgets/rating.php)
        email: ragrawal [at] gmail (dot) com
Inspiration: Will Stuckey's star rating system (http://sandbox.wilstuckey.com/jquery-ratings/)
Half-Star Addition: Karl Swedberg
Demonstration: http://examples.learningjquery.com/rating/
Usage: $('#rating').rating('url-to-post.php', {maxvalue:5, curvalue:0});

arguments
url : required -- post changes to 
options
  increment : 1, // value to increment by
	maxvalue: number of stars
	curvalue: number of selected stars
	

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

jQuery.fn.rating = function(videoid, options) {
	
	if(videoid == null) return;
	
	var settings = {
 	   	url : '/user/_video_rate', // post changes to 
 	   	videoid: videoid,
  	  	increment : .5,
  	  	maxvalue  : 5,   // max number of stars
		confirmM  : '#confRatings',   // Id of the element for confirm message
  		numRatings : '#numRatings',
		disable : false
  };
	
  if(options) {
    jQuery.extend(settings, options);
  };
   
   
  var container = jQuery(this);
	
	jQuery.extend(container, {
    averageRating: settings.curvalue,
    url: settings.url
  });
  settings.increment = (settings.increment < .75) ? .5 : 1;
  var s = 0;
	for(var i= 0; i <= settings.maxvalue ; i++){
    if (i == 0) {
	    if(settings.cancel == true){
        var div = '<div class="cancel"><a href="#0" title="Cancel Rating">Cancel Rating</a></div>';
        container.empty().append(div);
      }
    } else {
      var $div = $('<div class="diam"></div>')
        .append('<a href="#'+i+'" title="Rate it '+i+'/'+settings.maxvalue+'">'+i+'</a>')
        .appendTo(container);
      if (settings.increment == .5) {
        if (s%2) {
          $div.addClass('diam-left');
        } else {
          $div.addClass('diam-right');
        }
      }
    }
    i=i-1+settings.increment; 
    s++;
  }
	
  var stars  = jQuery(container).children('.diam');
  var links  = jQuery(container).children('.diam').children('a');
  var cancel = jQuery(container).children('.cancel');
	
  if(!settings.disable) {	
	  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 = (settings.curvalue == 0) ? 1 : 0;
				$(this).toggleClass('on');			
				jQuery.post(container.url, {
				"rating": jQuery(this).children('a')[0].href.split('#')[1] 
				});
				
				return false;
			}
			else {
				settings.curvalue = (stars.index(this) * settings.increment) + settings.increment;        		    		
				jQuery.post(container.url, {
					"videoid": settings.videoid,
				"rating": jQuery(this).children('a')[0].href.split('#')[1] 
			  });    
				
				// Update the rating count
				// Added by Jim DiStefano
				var video_rating = xajax.call('getVideoRating', { mode: 'synchronous', parameters: [ settings.videoid ] });
				$(settings.numRatings).html(video_rating);
	
				// Display thank message
				// Added by Vincent Perlerin 
				$(settings.confirmM).html('Thanks for rating!');
				stars.unbind("click").unbind("mouseout").unbind("mouseover").unbind("focus").unbind("blur");
				links.removeAttr('href').css('pointer','default');
				$('div.rating div a:hover').hover(function(){$(this).css('background-position','0 0')}); // -> Doesn't work
				return false;
			}
			return true;
				
	  });
  }

  // cancel button events
	if(cancel){
		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.
			var index = stars.index(el) + 1;
			stars
				.children('a').css('width', '100%').end()
				.slice(0,index).addClass('hover').end();
		},
		drain: function() { // drain all the stars.
			stars
				.filter('.on').removeClass('on').end()
				.filter('.hover').removeClass('hover').end();
		},
		reset: function(){ // Reset the stars to the default index.
			stars.slice(0,settings.curvalue / settings.increment).addClass('on').end();
		}
	};    
	event.reset();
	
	return(this);	

};