angular.module(['application.services'])
 // define the request notification channel for the pub/sub service
 .factory('requestNotificationChannel', ['$rootScope', function ($rootScope) {
  // private notification messages
  var _EDIT_DATA_ = '_EDIT_DATA_';
  var _DATA_UPDATED_ = '_DATA_UPDATED_';
 
  // publish edit data notification
  var editData = function (item) {
   $rootScope.$broadcast(_EDIT_DATA_, {item: item});
  };
  //subscribe to edit data notification
  var onEditData = function($scope, handler) {
   $scope.$on(_EDIT_DATA_, function(event, args) {
    handler(args.item);
   });
  };
  // publish data changed notification
  var dataUpdated = function () {
   $rootScope.$broadcast(_DATA_UPDATED_);
  };
  // subscribe to data changed notification
  var onDataUpdated = function ($scope, handler) {
   $scope.$on(_DATA_UPDATED_, function (event) {
    handler();
   });
  };
  // return the publicly accessible methods
  return {
   editData: editData,
   onEditData: onEditData,
   dataUpdated: dataUpdated,
   onDataUpdated: onDataUpdated
  };
 }])

 // define the data service that manages the data
 .factory('dataService', ['requestNotificationChannel', function (requestNotificationChannel) {
  // private data
  var hops = [
   { "_id": { "$oid": "50ae677361d118e3646d7d6c"}, "Name": "Admiral", "Origin": "United Kingdom", "Alpha": 14.75, "Amount": 0.0, "Use": "Boil", "Time": 0.0, "Notes": "Bittering hops derived from Wye Challenger. Good high-alpha bittering hops. Use for: Ales Aroma: Primarily for bittering Substitutions: Target, Northdown, Challenger", "Type": "Bittering", "Form": "Pellet", "Beta": 5.6, "HSI": 15.0, "Humulene": 0.0, "Caryophyllene": 0.0, "Cohumulone": 0.0, "Myrcene": 0.0, "Substitutes": ""} ,
   { "_id": { "$oid": "50ae677361d118e3646d7d6d"}, "Name": "Ahtanum", "Origin": "U.S.", "Alpha": 6.0, "Amount": 0.0, "Use": "Boil", "Time": 0.0, "Notes": "Distinctive aromatic hops with moderate bittering power from Washington. Use for: Distinctive aroma Substitutes: N/A", "Type": "Aroma", "Form": "Pellet", "Beta": 5.25, "HSI": 30.0, "Humulene": 0.0, "Caryophyllene": 0.0, "Cohumulone": 0.0, "Myrcene": 0.0, "Substitutes": ""} ,
   { "_id": { "$oid": "50ae677361d118e3646d7d6e"}, "Name": "Amarillo Gold", "Origin": "U.S.", "Alpha": 8.5, "Amount": 0.0, "Use": "Boil", "Time": 0.0, "Notes": "Unknown origin, but character similar to Cascade. Use for: IPAs, Ales Aroma: Citrus, Flowery Substitutions: Cascade, Centennial", "Type": "Aroma", "Form": "Pellet", "Beta": 6.0, "HSI": 25.0, "Humulene": 0.0, "Caryophyllene": 0.0, "Cohumulone": 0.0, "Myrcene": 0.0, "Substitutes": ""} ,
   { "_id": { "$oid": "50ae677361d118e3646d7d6f"}, "Name": "Aquila", "Origin": "U.S.", "Alpha": 6.5, "Amount": 0.0, "Use": "Boil", "Time": 0.0, "Notes": "Aroma hops developed in 1988. Limited use due to high cohumolone.Used for: Aroma hops Substitutes: ClusterNo longer commercially grown.", "Type": "Aroma", "Form": "Pellet", "Beta": 3.0, "HSI": 35.0, "Humulene": 0.0, "Caryophyllene": 0.0, "Cohumulone": 0.0, "Myrcene": 0.0, "Substitutes": ""} ,
   { "_id": { "$oid": "50ae677361d118e3646d7d70"}, "Name": "Auscha (Saaz)", "Origin": "Czech Republic", "Alpha": 3.3, "Amount": 0.0, "Use": "Boil", "Time": 0.0, "Notes": " Use for: Pilsners and Bohemian style lagers Aroma: Delicate, mild, clean, somewhat floral -- Noble hops Substitute: Tettnanger, LublinExamples: Pulsner Urquell", "Type": "Aroma", "Form": "Pellet", "Beta": 3.5, "HSI": 42.0, "Humulene": 0.0, "Caryophyllene": 0.0, "Cohumulone": 0.0, "Myrcene": 0.0, "Substitutes": ""} ,
  ];
  // sends notification that data has been updated
  var saveHop = function(hop) {
   requestNotificationChannel.dataUpdated();
  };
  // removes the item from the array and sends a notification that data has been updated
  var deleteHop = function(hop) {
   for(var i = 0; i < hops.length; i++) {
    if(hops[i]._id.$oid === hop._id.$oid) {
     hops.splice(i, 1);
     requestNotificationChannel.dataUpdated();
     return;
    }
   };
  };
  // internal function to generate a random number guid generation
  var S4 = function() {
   return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
  };
  // generates a guid for adding items to array
  var guid = function () {
   return (S4() + S4() + "-" + S4() + "-4" + S4().substr(0,3) + "-" + S4() + "-" + S4() + S4() + S4()).toLowerCase();
  };
  // function to add a hop to the array and sends a notification that data has been updated
  var addHop = function(hop) {
   hops.id.$oid = guid();
   hops.push(hop);
   requestNotificationChannel.dataUpdated();
  };
  // returns the array of hops
  var getHops = function() {
   return hops;
  };
  // returns a specific hop with the given id
  var getHop = function(id) {
   for(var i = 0; i < hops.length; i++) {
    if(hops[i]._id.$oid === id) {
     return hops[i];
    }
   };
  };
  // return the publicly accessible methods
  return {
   getHops: getHops,
   getHop: getHop,
   saveHop: saveHop,
   deleteHop: deleteHop,
   addHop: addHop
  }
 }]);

 //define the controller for view1
 .controller('view1-controller', ['$scope', 'dataService', 'requestNotificationChannel', function($scope, dataService, requestNotificationChannel) {
  $scope.hops = dataService.getHops();
 
  var onDataUpdatedHandler = function() {
   $scope.hops = dataService.getHops();
  }
 
  requestNotificationChannel.onDataUpdated($scope, onDataUpdatedHandler);
 
  $scope.onEdit = function(hop) {
   requestNotificationChannel.editData(hop);
  }
 
  $scope.onDelete = function(hop) {
   dataService.deleteHop(hop);
  }
 }]);

 //define the controller for view1
 .controller('view2-controller', ['$scope', 'dataService', 'requestNotificationChannel', function($scope, dataService, requestNotificationChannel) {
  $scope.hop = null;
 
  var onEditDataHandler = function(item) {
   $scope.hop = item;
  };
 
  requestNotificationChannel.onEditData($scope, onEditDataHandler);
 
  $scope.onSave = function() {
   dataService.saveHop($scope.hop);
   $scope.hop = null;
  }
 
  $scope.onCancel = function() {
   $scope.hop = null;
  }
 }]);