// Month object
function month() {
    this.year = null;
    this.month = null;
}


var MonthController = function($scope, $http, $rootScope) {
    // Month store and selection
    $scope.months = null;
    $scope.month = null;
    $scope.account = null;

    $scope.monthClass = function(month) {
        if(month == $scope.month) {
            return "active";
        }
    };

    // Function to load months
    $scope.loadMonths = function(account) {
        if(account) {
            $scope.account = account;
        }

        if($scope.account) {
            $http.get("api/accounts/" + $scope.account.id + "/months").success($scope.loadMonths_success);
        } else {
            $scope.$emit("monthsLoadedEvent", {account: null, month: null});
        }
    };

    $scope.loadMonths_success = function (data) {
        // Update months
        $scope.months = angular.fromJson(data);
        
        var monthToSelect = null;

        var today = new Date();
        var currentYear = today.getFullYear().toString();
        var currentMonth = (today.getMonth() + 1 < 10 ? "0" : "") + (today.getMonth() + 1);

        // Find the new instance of the previously selected month.
        angular.forEach($scope.months, function(month) {
            // Reset selected month to the new instance corresponding to the old one
            if($scope.month) {
                if(month == $scope.month) {
                    monthToSelect = month;
                }
            } else {
                if(month.year === currentYear && month.month === currentMonth) {
                    monthToSelect = month;
                }
            }
        });

        // Set selected month to the last one if not yet selected.
        if(!monthToSelect && $scope.months.length > 0) {
            monthToSelect = $scope.months[$scope.months.length - 1];
        }

        // Reset to month to select
        $scope.month = monthToSelect;

        $scope.$emit("monthsLoadedEvent", {account: $scope.account, month: $scope.month});
    };

    // Callback function to select a new month.
    $scope.selectMonth = function(month) {
        if(month) {
            $scope.month = month;
            $scope.$emit("monthsLoadedEvent", {account: $scope.account, month: month});
        }
    };

    $rootScope.$on("accountsLoadedEvent", function(event, args) {
        $scope.loadMonths(args.account);
    });
};