/**
 * 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.
 */
import { DatasourceMeta } from '../types';

/**
 * Convert Datasource columns to column choices
 */
export default function columnChoices(datasource?: DatasourceMeta | null): [string, string][] {
  return (
    datasource?.columns
      .map((col): [string, string] => [col.column_name, col.verbose_name || col.column_name])
      .sort((opt1, opt2) => (opt1[1].toLowerCase() > opt2[1].toLowerCase() ? 1 : -1)) || []
  );
}