/**
 * The home controller
 * 
 * @param {$scope} $scope The $scope service from angular
 */
mainApp.controller('homeCtrl', ['$scope', 'Compute', '$rootScope', 'Loading', 'Identity', 'Image', function ($scope, Compute, $rootScope, Loading, Identity, Image)
    {

        // Function to call after pull all data about machines
        var callMeAfterPullData = function (data) {
            $scope.machines = Compute.getData().machines;
            Loading.stop();
        };

        // Function to call to try to retrieve data and update the view
        var tryToRetrieveData = function () {
            // If no data retrieve about machine and user is logged
            if (Compute.getData().machines == null && Identity.isAlreadyLogin()) {
                Loading.start(); // Show loading gif
                Compute.pullData(callMeAfterPullData); // Retrieve data and call the callback
            } else {
                // Else if user is logged and data is already retrieve
                // simply display data
                if (Identity.isAlreadyLogin()) {
                    callMeAfterPullData(); // Display data
                }
            }
        };


        // On user login
        $scope.$on('loginEvent', function () {
            tryToRetrieveData();
        });



        // Function to call from view to display the details of a machine
        $scope.raiseShowMachineDetailsEvent = function (id) {

            // Stop loading gif and display overlay
            var callback = function () {
                Loading.stop();
                var data = Compute.getData();
                $rootScope.$broadcast("showMachineDetailsEvent", data.machines[id], data.axioms);

            };
            Loading.start(); // Show loading gif
            Compute.pullMachines(callback); // Retrieve machine info and display overlay
        };
        
        // Try to retrieve data for the first time
        tryToRetrieveData();
    }]);