/**
 * 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.
 */
/* eslint camelcase: 0 */

export function formatSelectOptions(options) {
  return options.map(opt => [opt, opt.toString()]);
}

export function getDatasourceParameter(datasourceId, datasourceType) {
  return `${datasourceId}__${datasourceType}`;
}

export function getParam(name) {
  /* eslint no-useless-escape: 0 */
  const formattedName = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
  const regex = new RegExp(`[\\?&]${formattedName}=([^&#]*)`);
  const results = regex.exec(window.location.search);
  return results === null
    ? ''
    : decodeURIComponent(results[1].replace(/\+/g, ' '));
}

export function mainMetric(savedMetrics) {
  // Using 'count' as default metric if it exists, otherwise using whatever one shows up first
  let metric;
  if (savedMetrics && savedMetrics.length > 0) {
    savedMetrics.forEach(m => {
      if (m.metric_name === 'count') {
        metric = 'count';
      }
    });
    if (!metric) {
      metric = savedMetrics[0].metric_name;
    }
  }
  return metric;
}