var ShConfig = ShConfig||{};
ShConfig.Slider = {};

ShConfig.Slider.uiInit = function($, min, max, step, watcher, value){
  $(".slider").slider({
    range: "min",
    min: min,
    max: max,
    step: step,
    value: value,
    create: function(){
        $('#slider-value').appendTo($('.slider a').get(0));
        $('#slider-price').appendTo($('.slider a').get(0));
    },
    slide: function(event, ui){
      watcher.trigger('SLIDE', ui.value);
    },
    stop: function(){
      watcher.trigger('STOP');
    },
  });
};

ShConfig.Slider.watcher = function(){
  var watches = {};

  return {
    watch: function(callbacks) {
      var id = Math.random().toString();
      watches[id] = callbacks;

      // Return a function that removes the listener
      return function() {
        watches[id] = null;
        delete watches[id];
      };
    },
    trigger: function(type, value) {
      for (var k in watches) {
       if(type == 'SLIDE'){
        watches[k].slide(value);
       }
       if(type == 'STOP'){
        watches[k].stop();
       }
      }
    }
  };
};

ShConfig.Slider.ModelController = function(itemList, max, predefined){
  return function($scope){
    $scope.label = predefined.label;
    $scope.price = predefined.price;
    $scope.max = max;
    var unbind = consumptionWatcher.watch({
      slide: function(newVal){
        for(var i in itemList){
          if(itemList[i].value == newVal){
            $scope.label = itemList[i].label;
            $scope.price = itemList[i].price;
            $scope.$apply();
          }
        }
      },
      stop: function(){
        //nothing to do
      }
    });
    $scope.$on('$destroy', unbind);
  };
};

ShConfig.Slider.buildPredefinedSelection = function(
  predefinedSelectionLabel, itemList
){
  var sliderSelectionFromConsumptionList = function(i){
    return {
      label: itemList[i].label,
      price: itemList[i].price,
      value: itemList[i].value,
    };
  };
  for(var i in itemList){
    if(itemList[i].label == predefinedSelectionLabel){
      return sliderSelectionFromConsumptionList(i);
    }
  }
  return sliderSelectionFromConsumptionList(0);
};