/*
    * 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.lifecycle;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.logging.Logger;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * @since 3.0
   * @author Jason van Zyl
   * @author Kristian Rosenvold
   */
  // TODO The configuration for the lifecycle needs to be externalized so that I can use the annotations properly for the
  // wiring and reference and external source for the lifecycle configuration.
  @Component(role = DefaultLifecycles.class)
  public class DefaultLifecycles {
      public static final String[] STANDARD_LIFECYCLES = {"clean", "default", "site"};
  
      // @Configuration(source="org/apache/maven/lifecycle/lifecycles.xml")
  
      @Requirement(role = Lifecycle.class)
      private Map<String, Lifecycle> lifecycles;
  
      @Requirement
      private Logger logger;
  
      public DefaultLifecycles() {}
  
      public DefaultLifecycles(Map<String, Lifecycle> lifecycles, Logger logger) {
          this.lifecycles = new LinkedHashMap<>();
          this.logger = logger;
          this.lifecycles = lifecycles;
      }
  
      public Lifecycle get(String key) {
          return getPhaseToLifecycleMap().get(key);
      }
  
      /**
       * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
       * phase they want to execute and we can easily determine what lifecycle we need to run.
       *
       * @return A map of lifecycles, indexed on id
       */
      public Map<String, Lifecycle> getPhaseToLifecycleMap() {
          // If people are going to make their own lifecycles then we need to tell people how to namespace them correctly
          // so that they don't interfere with internally defined lifecycles.
  
          HashMap<String, Lifecycle> phaseToLifecycleMap = new HashMap<>();
  
          for (Lifecycle lifecycle : getLifeCycles()) {
              if (logger.isDebugEnabled()) {
                  logger.debug("Lifecycle " + lifecycle);
              }
  
              for (String phase : lifecycle.getPhases()) {
                  // The first definition wins.
                  if (!phaseToLifecycleMap.containsKey(phase)) {
                      phaseToLifecycleMap.put(phase, lifecycle);
                  } else {
                      Lifecycle original = phaseToLifecycleMap.get(phase);
                      logger.warn("Duplicated lifecycle phase " + phase + ". Defined in " + original.getId()
                              + " but also in " + lifecycle.getId());
                  }
              }
          }
  
          return phaseToLifecycleMap;
      }
  
      /**
       * Returns an ordered list of lifecycles
      */
     public List<Lifecycle> getLifeCycles() {
         // ensure canonical order of standard lifecycles
         Map<String, Lifecycle> lifecycles = new LinkedHashMap<>(this.lifecycles);
 
         LinkedHashSet<String> lifecycleNames = new LinkedHashSet<>(Arrays.asList(STANDARD_LIFECYCLES));
         lifecycleNames.addAll(lifecycles.keySet());
 
         ArrayList<Lifecycle> result = new ArrayList<>();
         for (String name : lifecycleNames) {
             Lifecycle lifecycle = lifecycles.get(name);
             if (lifecycle.getId() == null) {
                 throw new NullPointerException("A lifecycle must have an id.");
             }
             result.add(lifecycle);
         }
 
         return result;
     }
 
     public String getLifecyclePhaseList() {
         Set<String> phases = new LinkedHashSet<>();
 
         for (Lifecycle lifecycle : getLifeCycles()) {
             phases.addAll(lifecycle.getPhases());
         }
 
         return StringUtils.join(phases.iterator(), ", ");
     }
 }