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/*-
 * -\-\-
 * DBeam Core
 * --
 * Copyright (C) 2016 - 2018 Spotify AB
 * --
 * Licensed 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.
 * -/-/-
 */

package com.spotify.dbeam.options;

import com.google.common.base.Strings;
import java.util.Arrays;
import java.util.concurrent.ThreadLocalRandom;
import java.util.stream.Collectors;
import org.apache.beam.sdk.options.ApplicationNameOptions;
import org.apache.beam.sdk.options.PipelineOptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JobNameConfiguration {

  private static Logger LOGGER = LoggerFactory.getLogger(JobNameConfiguration.class);

  private static String normalizeString(final String str) {
    return str.toLowerCase().replaceAll("[^a-z0-9]", "");
  }

  public static void configureJobName(final PipelineOptions options, final String... parts) {
    try {
      options.as(ApplicationNameOptions.class).setAppName("JdbcAvroJob");
    } catch (Exception e) {
      LOGGER.warn("Unable to configure ApplicationName", e);
    }
    if (options.getJobName() == null || "auto".equals(options.getJobName())) {
      final String randomPart = Integer.toHexString(ThreadLocalRandom.current().nextInt());
      final String jobName =
          String.format(
              "dbeam-%s-%s",
              Arrays.stream(parts)
                  .filter(p -> !Strings.isNullOrEmpty(p))
                  .map(JobNameConfiguration::normalizeString)
                  .collect(Collectors.joining("-")),
              randomPart);
      options.setJobName(jobName);
    }
  }
}