/*
 * 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
 *
 *   https://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 org.apache.accumulo.core.cli;

import java.util.function.Consumer;

import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.ParameterException;

public class Help {
  @Parameter(names = {"-h", "-?", "--help", "-help"}, help = true)
  public boolean help = false;

  public void parseArgs(Consumer<JCommander> jcConsumer, String programName, String[] args,
      Object... others) {
    JCommander commander = new JCommander();
    jcConsumer.accept(commander);
    commander.addObject(this);
    for (Object other : others) {
      commander.addObject(other);
    }
    commander.setProgramName(programName);
    try {
      commander.parse(args);
    } catch (ParameterException ex) {
      commander.usage();
      exitWithError(ex.getMessage(), 1);
    }
    if (help) {
      commander.usage();
      exit(0);
    }
  }

  public void parseArgs(String programName, String[] args, Object... others) {
    parseArgs(jCommander -> {}, programName, args, others);
  }

  public void exit(int status) {
    System.exit(status);
  }

  public void exitWithError(String message, int status) {
    System.err.println(message);
    exit(status);
  }
}
