Everlive.Events.beforeRead(function(request, context, done) {
  
	done();
});

Everlive.Events.afterRead(function(request, response, context, done) {

	done();
});

Everlive.Events.beforeCreate(function(request, context, done) {
	
	done();
});

Everlive.Events.afterCreate(function(request, response, context, done) {
  	calculateRating(request.data.MenuItem, done);
});

Everlive.Events.beforeUpdate(function(request, context, done) {

	done();
});

Everlive.Events.afterUpdate(function(request, response, context, done) {
    if (request && request.data && request.data.$set && request.data.$set.MenuItem) {
      calculateRating(request.data.$set.MenuItem, done);
    }
    else {
      done();
    }
});

Everlive.Events.beforeDelete(function(request, context, done) {

	done();
});

Everlive.Events.afterDelete(function(request, response, context, done) {

	done();
});

var calculateRating = function(menuItem, done) {
  var filter = { "MenuItem" : menuItem, "State": 0 };
	var options = {
        headers:{
            "Authorization" : "Masterkey <key>",
          	"X-Everlive-Filter" : JSON.stringify(filter)
        }
    };
    Everlive.Http.get('https://api.everlive.com/v1/<key>/MenuItemRatings/', options,
        function(error, ratings) {
            if(error){
                console.error(error);
              	done();
            } else {             	
              	var totalRating = 0;
              	for (var i = 0; i < ratings.data.Count; i++) {
              		var itemRating = ratings.data.Result[i];
                  	totalRating += (itemRating.Rating === null) ? 0 : parseInt(itemRating.Rating);
                    console.log("rating - " + itemRating.Rating);
                  	console.log("total rating - " + totalRating);
              	}
              	var average = (totalRating * 5) / (5 * ratings.data.Count);   
                console.log("average - " + average);
                var object = { "Rating" : average, "RatingsCount" : ratings.data.Count };
                options = {
                    headers:{
                        "Authorization" : "Masterkey <key>"
                    },
                  	contentType: "application/json",
                  	body: JSON.stringify(object)
                };
              	Everlive.Http.put('https://api.everlive.com/v1/<key>/MenuItems/' + menuItem, options,
                    function(error) {
                        if(error){
                            console.error(JSON.stringify(error));
                        }                
                        done();
                    }
                );
            }        
        }
    );
};