/*
    * 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.internal.impl;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.Collection;
  
  import org.apache.maven.api.Event;
  import org.apache.maven.api.EventType;
  import org.apache.maven.api.Listener;
  import org.apache.maven.eventspy.EventSpy;
  import org.apache.maven.execution.ExecutionEvent;
  
  /**
   * Bridges between Maven3 events and Maven4 events.
   */
  @Named
  @Singleton
  public class EventSpyImpl implements EventSpy {
      @Override
      public void init(Context context) throws Exception {}
  
      @Override
      public void onEvent(Object arg) throws Exception {
          if (arg instanceof ExecutionEvent ee) {
              InternalMavenSession session =
                      InternalMavenSession.from(ee.getSession().getSession());
              EventType eventType = convert(ee.getType());
              Collection<Listener> listeners = session.getListeners();
              if (!listeners.isEmpty()) {
                  Event event = new DefaultEvent(session, ee, eventType);
                  for (Listener listener : listeners) {
                      listener.onEvent(event);
                  }
              }
          }
      }
  
      /**
       * Simple "conversion" from Maven3 event type enum to Maven4 enum.
       */
      protected EventType convert(ExecutionEvent.Type type) {
          return EventType.values()[type.ordinal()];
      }
  
      @Override
      public void close() throws Exception {}
  }