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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *    http: *www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

'use strict';

/**
 * @ngdoc function
 * @name ocwUiApp.controller:RcmedSelectionCtrl
 * @description
 * # RcmedSelectionCtrl
 * Controller of the ocwUiApp
 */
angular.module('ocwUiApp')
  .controller('RcmedSelectionCtrl', ['$rootScope', '$scope', '$http', '$timeout', 'selectedDatasetInformation',
    function($rootScope, $scope, $http, $timeout, selectedDatasetInformation) {
      // Grab a copy of the datasets so we can display a count to the user!
      $scope.datasetCount = selectedDatasetInformation.getDatasets();
      $scope.fileAdded = false;

      $scope.getObservations = function() {
        $http.jsonp($rootScope.baseURL + '/rcmed/datasets/?callback=JSON_CALLBACK').
          success(function(data) {
            $scope.availableObs = data;
            $scope.availableObs.splice(0, 0, {longname: 'Please select an option'});
            $scope.datasetSelection = $scope.availableObs[0];
          }).
          error(function(data) {
            $scope.availableObs = ["Unable to query RCMED"]
          });
      };

      $scope.getObservationBounds = function() {
        $scope.observationBounds = {};

        $http.get($rootScope.baseURL + '/rcmed/parameters/bounds/')
          .success(function(data) {
              $scope.observationBounds = data;
              $scope.observationBounds['default'] = {
                  'start': '1900-01-01 00:00:00',
                  'end': '2050-01-01 00:00:00',
                  'latMin': -90,
                  'latMax': 89,
                  'lonMin': -180,
                  'lonMax': 179,
              };
          })
          .error(function(data) {
              $scope.observationBounds['default'] = {
                  'start': '1900-01-01 00:00:00',
                  'end': '2050-01-01 00:00:00',
                  'latMin': -90,
                  'latMax': 89,
                  'lonMin': -180,
                  'lonMax': 179,
              };
          });
      };

      $scope.getBoundsByParameterId = function(parameterId) {
        if (parameterId in $scope.observationBounds) {
          return $scope.observationBounds[parameterId];
        } else {
          return $scope.observationBounds['default'];
        }
      };

      $scope.dataSelectUpdated = function() {
        var urlString = $rootScope.baseURL + '/rcmed/parameters/?dataset=' +
                        $scope.datasetSelection["shortname"] +
                        "&callback=JSON_CALLBACK";
        $http.jsonp(urlString)
          .success(function(data) {
            $scope.retrievedObsParams = data;
            if ($scope.retrievedObsParams.length > 1)
              $scope.retrievedObsParams.splice(0, 0, {shortname: 'Please select a parameter'});
            $scope.parameterSelection = $scope.retrievedObsParams[0];
          });
      };

      $scope.addObservation = function() {
        var newDataset = {};

        newDataset['isObs'] = 1;
        // Save the dataset id (the important part) and name (for display purposes)
        newDataset['datasetId'] = $scope.datasetSelection['dataset_id'];
        newDataset['name'] = $scope.datasetSelection['longname'];
        // Save the parameter id (the important part) and name (for display purposes)
        newDataset['id']    = $scope.parameterSelection['parameter_id'];
        newDataset['param'] = $scope.parameterSelection['parameter_id'];
        newDataset['paramName'] = $scope.parameterSelection['longname'];

        var bounds = $scope.getBoundsByParameterId(newDataset['id']);
        newDataset['latlonVals'] = {
          'latMin': bounds['lat_min'],
          'latMax': bounds['lat_max'],
          'lonMin': bounds['lon_min'],
          'lonMax': bounds['lon_max'],
        };
        newDataset['timeVals'] = {
          'start': bounds['start_date'],
          'end': bounds['end_date'],
        };

        // Set some defaults for lat/lon/time variable names. This just helps
        // us display stuff later.
        newDataset['lat'] = "N/A";
        newDataset['lon'] = "N/A";
        newDataset['time'] = "N/A";

        selectedDatasetInformation.addDataset(newDataset);

        // Clear the user selections by requery-ing RCMED. This is really hacky, but it works for now...
        $scope.availableObs = [];
        $scope.retrievedObsParams = [];
        $scope.getObservations();

        // Display a confirmation message for a little bit
        $scope.fileAdded = true;
        $timeout(function() {
          $scope.fileAdded = false;
        }, 2000);
      };

      // Grab the available observations from RCMED
      $scope.getObservations();
      $scope.getObservationBounds();
    }
  ]);
