/*
 * 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.
 */

package org.apache.hadoop.hdds.scm.cli.datanode;

import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hdds.cli.ItemsFromStdin;
import picocli.CommandLine;

/** Parameter for specifying list of datanode addresses. */
@CommandLine.Command
public class DatanodeParameters extends ItemsFromStdin {

  @CommandLine.Spec
  private CommandLine.Model.CommandSpec spec;

  @CommandLine.Parameters(
      description = {
          "Datanode addresses: one or more on the command line, OR read from stdin with '-'.",
          "Stdin usage:",
          "  ozone admin datanode diskbalancer <subcommand> -",
          "  Then type one datanode per line and end input:",
          "    - Linux/macOS: Ctrl-D",
          "    - Windows:     Ctrl-Z, then Enter",
          "Examples:",
          "  # Piped (recommended for scripts)",
          "  echo -e \"DN-1\\nDN-2\" | ozone admin datanode diskbalancer status -",
          "  # From file having list of dns to balance",
          "  ozone admin datanode diskbalancer report - < datanode-lists.txt",
          "Port is optional and defaults to 19864 (CLIENT_RPC port).",
          "Address examples: 'DN-1', 'DN-1:19864', '192.168.1.10'."
      },
      arity = "0..*",
      paramLabel = "<datanode address>")

  public void setDatanodes(List<String> arguments) {
    setItems(arguments);
  }

  public List<String> getDatanodes() {
    return new ArrayList<>(getItems());
  }
}

