'use strict';

/**
 * @ngdoc function
 * @name docker-registry-frontend.controller:TagItemController
 * @description
 * # TagItemController
 * Every item in the tag list is associated with a TagItemController
 */
angular.module('tag-item-controller', ['registry-services'])
  .controller('TagItemController', ['$scope', 'Image', 'Ancestry',
  function($scope, Image, Ancestry){
    
    // Assign details to "tag" variable in the parent scope    
    
    $scope.tag.details = Image.query( {imageId: $scope.tag.imageId} );
    
    /**
     * Calculates the total download size for the image based on
     * it's ancestry.
     */
    $scope.totalImageSize = null;
    $scope.calculateTotalImageSize = function() {
      
      /* Fetch the image's ancestry and when complete, fetch the size of each image */      
      
      Ancestry.query( {imageId: $scope.tag.imageId} ).$promise.then(function (result) {
        
        $scope.totalImageSize = 0;
        
        angular.forEach(result, function (id, key) {
          
          /* We have to use the $promise object here to be sure the result is accessible */
          
          Image.get( {imageId: id} ).$promise.then(function (result) {
            if (!isNaN(result.Size-0)) {    
              $scope.totalImageSize += result.Size;
            }
          });
          
        });
        
        
      });
    };
    
  }]);