Why can not I use $ scope angularjs?

I have this code, and I am sending an alert, but what is inside $ scope does not work. Why will it be?

angular.module('myApp', []).controller('Ctrl', WineCtrl,  ['$scope', function($scope){

alert()


}]);



function WineCtrl() {

  var self = this;

  // Variables - Public
  self.filter = {};
  self.wines = [
    {name: 'Apartamentos 1', category: 'Apartamento'},
    {name: 'Apartamentos 2', category: 'Casa'},
    {name: 'Apartamentos 3', category: 'Casa Apartamento'},
    {name: 'Apartamentos 4', category: 'Apartamento'},
    {name: 'Apartamentos 5', category: 'Hotel'},
    {name: 'Apartamentos 6', category: 'Apartamento'},
    {name: 'Apartamentos 7', category: 'Casa Apartamento'},
    {name: 'Apartamentos 8', category: 'Hotel'}    
  ];

  // Functions - Public
  self.filterByCategory = filterByCategory;
  self.getCategories = getCategories;

  // Functions - Definitions
  function filterByCategory(wine) {
    return self.filter[wine.category] || noFilter(self.filter);
  }

  function getCategories() {
    return (self.wines || []).
      map(function (wine) { return wine.category; }).
      filter(function (cat, idx, arr) { return arr.indexOf(cat) === idx; });
  }

  function noFilter(filterObj) {
    return Object.
      keys(filterObj).
      every(function (key) { return !filterObj[key]; });
  }
}