/*
    * 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.maven.surefire.api.booter;
  
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  import static org.apache.maven.surefire.shared.utils.StringUtils.isBlank;
  
  /**
   * Encapsulates data and command sent from master to forked process.
   *
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.19
   */
  public final class Command {
      public static final Command TEST_SET_FINISHED = new Command(MasterProcessCommand.TEST_SET_FINISHED);
      public static final Command SKIP_SINCE_NEXT_TEST = new Command(MasterProcessCommand.SKIP_SINCE_NEXT_TEST);
      public static final Command NOOP = new Command(MasterProcessCommand.NOOP);
      public static final Command BYE_ACK = new Command(MasterProcessCommand.BYE_ACK);
  
      private final MasterProcessCommand command;
      private final String data;
  
      public Command(MasterProcessCommand command, String data) {
          this.command = requireNonNull(command);
          this.data = data;
      }
  
      public Command(MasterProcessCommand command) {
          this(command, null);
      }
  
      public static Command toShutdown(Shutdown shutdownType) {
          return new Command(MasterProcessCommand.SHUTDOWN, shutdownType.getParam());
      }
  
      public static Command toRunClass(String runClass) {
          return new Command(MasterProcessCommand.RUN_CLASS, runClass);
      }
  
      public MasterProcessCommand getCommandType() {
          return command;
      }
  
      public String getData() {
          return data;
      }
  
      /**
       * @return {@link Shutdown} or {@link Shutdown#DEFAULT} if {@link #getData()} is null or blank string
       */
      public Shutdown toShutdownData() {
          if (command != MasterProcessCommand.SHUTDOWN) {
              throw new IllegalStateException("expected MasterProcessCommand.SHUTDOWN");
          }
          return isBlank(data) ? Shutdown.DEFAULT : Shutdown.parameterOf(data);
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
  
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          Command arg = (Command) o;
  
          return command == arg.command && Objects.equals(data, arg.data);
      }
  
      @Override
      public int hashCode() {
          int result = command.hashCode();
          result = 31 * result + (data != null ? data.hashCode() : 0);
          return result;
      }
  }