define([
  'angular',
  'app',
  'lodash'
],
function (angular, app, _) {
  'use strict';

  var module = angular.module('grafana.controllers');

  module.controller('SubmenuCtrl', function($scope, $q, $rootScope, datasourceSrv) {
    var _d = {
      enable: true
    };

    _.defaults($scope.pulldown,_d);

    $scope.init = function() {
      $scope.panel = $scope.pulldown;
      $scope.row = $scope.pulldown;
    };

    $scope.filterOptionSelected = function(templateParameter, option, recursive) {
      templateParameter.current = option;

      $scope.filter.updateTemplateData();

      return $scope.applyFilterToOtherFilters(templateParameter)
        .then(function() {
          // only refresh in the outermost call
          if (!recursive) {
            $scope.dashboard.emit_refresh();
          }
        });
    };

    $scope.applyFilterToOtherFilters = function(updatedTemplatedParam) {
      var promises = _.map($scope.filter.templateParameters, function(templateParam) {
        if (templateParam === updatedTemplatedParam) {
          return;
        }
        if (templateParam.query.indexOf('[[' + updatedTemplatedParam.name + ']]') !== -1) {
          return $scope.applyFilter(templateParam);
        }
      });

      return $q.all(promises);
    };

    $scope.applyFilter = function(templateParam) {
      return datasourceSrv.default.metricFindQuery($scope.filter, templateParam.query)
        .then(function (results) {
          templateParam.editing = undefined;
          templateParam.options = _.map(results, function(node) {
            return { text: node.text, value: node.text };
          });

          if (templateParam.includeAll) {
            var allExpr = '{';
            _.each(templateParam.options, function(option) {
              allExpr += option.text + ',';
            });
            allExpr = allExpr.substring(0, allExpr.length - 1) + '}';
            templateParam.options.unshift({text: 'All', value: allExpr});
          }

          // if parameter has current value
          // if it exists in options array keep value
          if (templateParam.current) {
            var currentExists = _.findWhere(templateParam.options, { value: templateParam.current.value });
            if (currentExists) {
              return $scope.filterOptionSelected(templateParam, templateParam.current, true);
            }
          }

          return $scope.filterOptionSelected(templateParam, templateParam.options[0], true);
        });
    };

    $scope.disableAnnotation = function (annotation) {
      annotation.enable = !annotation.enable;
      $rootScope.$broadcast('refresh');
    };

    $scope.init();

  });

});