(function() {
  'use strict';

  function QueryViewCtrl($scope, Events, $route, $location, notifications, growl, Query, DataSource) {
    var DEFAULT_TAB = 'table';

    $scope.query = $route.current.locals.query;
    Events.record(currentUser, 'view', 'query', $scope.query.id);
    $scope.queryResult = $scope.query.getQueryResult();
    $scope.queryExecuting = false;

    $scope.isQueryOwner = currentUser.id === $scope.query.user.id;
    $scope.canViewSource = currentUser.hasPermission('view_source');

    $scope.dataSources = DataSource.get(function(dataSources) {
      $scope.query.data_source_id = $scope.query.data_source_id || dataSources[0].id;
    });

    // in view mode, latest dataset is always visible
    // source mode changes this behavior
    $scope.showDataset = true;

    $scope.lockButton = function(lock) {
      $scope.queryExecuting = lock;
    };

    $scope.saveQuery = function(options, data) {
      if (data) {
        data.id = $scope.query.id;
      } else {
        data = _.clone($scope.query);
      }

      options = _.extend({}, {
        successMessage: 'Query saved',
        errorMessage: 'Query could not be saved'
      }, options);

      delete data.latest_query_data;
      delete data.queryResult;

      return Query.save(data, function() {
        growl.addSuccessMessage(options.successMessage);
      }, function(httpResponse) {
        growl.addErrorMessage(options.errorMessage);
      }).$promise;
    }

    $scope.saveDescription = function() {
      Events.record(currentUser, 'edit_description', 'query', $scope.query.id);
      $scope.saveQuery(undefined, {'description': $scope.query.description});
    };

    $scope.saveName = function() {
      Events.record(currentUser, 'edit_name', 'query', $scope.query.id);
      $scope.saveQuery(undefined, {'name': $scope.query.name});
    };

    $scope.executeQuery = function() {
      $scope.queryResult = $scope.query.getQueryResult(0);
      $scope.lockButton(true);
      $scope.cancelling = false;
      Events.record(currentUser, 'execute', 'query', $scope.query.id);
    };

    $scope.cancelExecution = function() {
      $scope.cancelling = true;
      $scope.queryResult.cancelExecution();
      Events.record(currentUser, 'cancel_execute', 'query', $scope.query.id);
    };

    $scope.updateDataSource = function() {
      Events.record(currentUser, 'update_data_source', 'query', $scope.query.id);

      $scope.query.latest_query_data = null;
      $scope.query.latest_query_data_id = null;

      if ($scope.query.id) {
        Query.save({
          'id': $scope.query.id,
          'data_source_id': $scope.query.data_source_id,
          'latest_query_data_id': null
        });
      }

      $scope.executeQuery();
    };

    $scope.setVisualizationTab = function (visualization) {
      $scope.selectedTab = visualization.id;
      $location.hash(visualization.id);
    };

    $scope.$watch('query.name', function() {
      $scope.$parent.pageTitle = $scope.query.name;
    });

    $scope.$watch('queryResult && queryResult.getData()', function(data, oldData) {
      if (!data) {
        return;
      }

      $scope.filters = $scope.queryResult.getFilters();
    });

    $scope.$watch("queryResult && queryResult.getStatus()", function(status) {
      if (!status) {
        return;
      }

      if (status == 'done') {
        if ($scope.query.id &&
          $scope.query.latest_query_data_id != $scope.queryResult.getId() &&
          $scope.query.query_hash == $scope.queryResult.query_result.query_hash) {
          Query.save({
            'id': $scope.query.id,
            'latest_query_data_id': $scope.queryResult.getId()
          })
        }
        $scope.query.latest_query_data_id = $scope.queryResult.getId();
        $scope.query.queryResult = $scope.queryResult;

        notifications.showNotification("re:dash", $scope.query.name + " updated.");
      }

      if (status === 'done' || status === 'failed') {
        $scope.lockButton(false);
      }
    });

    $scope.$watch(function() {
      return $location.hash()
    }, function(hash) {
      if (hash == 'pivot') {
        Events.record(currentUser, 'pivot', 'query', $scope.query && $scope.query.id);
      }
      $scope.selectedTab = hash || DEFAULT_TAB;
    });
  };

  angular.module('redash.controllers')
    .controller('QueryViewCtrl',
      ['$scope', 'Events', '$route', '$location', 'notifications', 'growl', 'Query', 'DataSource', QueryViewCtrl]);
})();