/*
    * 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 javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.Arrays;
  import java.util.Comparator;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @since 3.0
   */
  // 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.
  @Named
  @Singleton
  public class DefaultLifecycles {
      public static final String[] STANDARD_LIFECYCLES = {"clean", "default", "site", "wrapper"};
  
      private final Logger logger = LoggerFactory.getLogger(getClass());
  
      // @Configuration(source="org/apache/maven/lifecycle/lifecycles.xml")
  
      private final PlexusContainer plexusContainer;
  
      private Map<String, Lifecycle> customLifecycles;
  
      public DefaultLifecycles() {
          this.plexusContainer = null;
      }
  
      /**
       * @deprecated Rely on {@link #DefaultLifecycles(PlexusContainer)} instead
       */
      @Deprecated
      public DefaultLifecycles(Map<String, Lifecycle> lifecycles, org.codehaus.plexus.logging.Logger logger) {
          this.customLifecycles = lifecycles;
          this.plexusContainer = null;
      }
  
      @Inject
      public DefaultLifecycles(PlexusContainer plexusContainer) {
          this.plexusContainer = plexusContainer;
      }
  
      /**
       * Get lifecycle based on phase
       *
       * @param phase
       * @return
       */
      public Lifecycle get(String phase) {
          return getPhaseToLifecycleMap().get(phase);
      }
  
      /**
       * 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.
  
          Map<String, Lifecycle> phaseToLifecycleMap = new HashMap<>();
  
          for (Lifecycle lifecycle : getLifeCycles()) {
              logger.debug("Lifecycle {}", lifecycle);
  
              for (String phase : lifecycle.getPhases()) {
                 // The first definition wins.
                 if (!phaseToLifecycleMap.containsKey(phase)) {
                     phaseToLifecycleMap.put(phase, lifecycle);
                 } else if (logger.isWarnEnabled()) {
                     Lifecycle original = phaseToLifecycleMap.get(phase);
                     logger.warn(
                             "Duplicated lifecycle phase {}. Defined in {} but also in {}",
                             phase,
                             original.getId(),
                             lifecycle.getId());
                 }
             }
         }
 
         return phaseToLifecycleMap;
     }
 
     /**
      * Returns an ordered list of lifecycles
      */
     public List<Lifecycle> getLifeCycles() {
         List<String> lifecycleIds = Arrays.asList(STANDARD_LIFECYCLES);
 
         Comparator<String> comparator = (l, r) -> {
             int lx = lifecycleIds.indexOf(l);
             int rx = lifecycleIds.indexOf(r);
 
             if (lx < 0 || rx < 0) {
                 return rx - lx;
             } else {
                 return lx - rx;
             }
         };
 
         Map<String, Lifecycle> lifecyclesMap = lookupLifecycles();
 
         // ensure canonical order of standard lifecycles
         return lifecyclesMap.values().stream()
                 .peek(l -> Objects.requireNonNull(l.getId(), "A lifecycle must have an id."))
                 .sorted(Comparator.comparing(Lifecycle::getId, comparator))
                 .collect(Collectors.toList());
     }
 
     private Map<String, Lifecycle> lookupLifecycles() {
         // TODO: Remove the following code when maven-compat is gone
         // This code is here to ensure maven-compat's EmptyLifecycleExecutor keeps on working.
         if (plexusContainer == null) {
             return customLifecycles != null ? customLifecycles : new HashMap<>();
         }
 
         // Lifecycles cannot be cached as extensions might add custom lifecycles later in the execution.
         try {
             return plexusContainer.lookupMap(Lifecycle.class);
         } catch (ComponentLookupException e) {
             throw new IllegalStateException("Unable to lookup lifecycles from the plexus container", e);
         }
     }
 
     public String getLifecyclePhaseList() {
         return getLifeCycles().stream().flatMap(l -> l.getPhases().stream()).collect(Collectors.joining(", "));
     }
 }