/*
    * 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.internal;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.HashSet;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.NoSuchElementException;
  import java.util.Set;
  
  import org.apache.maven.api.xml.XmlNode;
  import org.apache.maven.lifecycle.DefaultLifecycles;
  import org.apache.maven.lifecycle.LifeCyclePluginAnalyzer;
  import org.apache.maven.lifecycle.Lifecycle;
  import org.apache.maven.lifecycle.mapping.LifecycleMapping;
  import org.apache.maven.lifecycle.mapping.LifecycleMojo;
  import org.apache.maven.lifecycle.mapping.LifecyclePhase;
  import org.apache.maven.model.InputLocation;
  import org.apache.maven.model.InputSource;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.PluginExecution;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
   *
   * @since 3.0
   */
  @Singleton
  @Named
  public class DefaultLifecyclePluginAnalyzer implements LifeCyclePluginAnalyzer {
      public static final String DEFAULTLIFECYCLEBINDINGS_MODELID = "org.apache.maven:maven-core:"
              + DefaultLifecyclePluginAnalyzer.class.getPackage().getImplementationVersion()
              + ":default-lifecycle-bindings";
  
      private final Logger logger = LoggerFactory.getLogger(getClass());
  
      private final PlexusContainer plexusContainer;
  
      private final DefaultLifecycles defaultLifeCycles;
  
      @Inject
      public DefaultLifecyclePluginAnalyzer(
              final PlexusContainer plexusContainer, final DefaultLifecycles defaultLifeCycles) {
          this.plexusContainer = requireNonNull(plexusContainer);
          this.defaultLifeCycles = requireNonNull(defaultLifeCycles);
      }
  
      // These methods deal with construction intact Plugin object that look like they come from a standard
      // <plugin/> block in a Maven POM. We have to do some wiggling to pull the sources of information
      // together and this really shows the problem of constructing a sensible default configuration but
      // it's all encapsulated here so it appears normalized to the POM builder.
  
      // We are going to take the project packaging and find all plugins in the default lifecycle and create
      // fully populated Plugin objects, including executions with goals and default configuration taken
      // from the plugin.xml inside a plugin.
      //
  
      @Override
      public Set<Plugin> getPluginsBoundByDefaultToAllLifecycles(String packaging) {
          if (logger.isDebugEnabled()) {
              logger.debug("Looking up lifecycle mappings for packaging " + packaging + " from "
                      + Thread.currentThread().getContextClassLoader());
          }
  
          LifecycleMapping lifecycleMappingForPackaging = lookupLifecycleMapping(packaging);
  
          if (lifecycleMappingForPackaging == null) {
              return null;
          }
  
          Map<Plugin, Plugin> plugins = new LinkedHashMap<>();
 
         for (Lifecycle lifecycle : defaultLifeCycles.getLifeCycles()) {
             org.apache.maven.lifecycle.mapping.Lifecycle lifecycleConfiguration =
                     lifecycleMappingForPackaging.getLifecycles().get(lifecycle.getId());
 
             Map<String, LifecyclePhase> phaseToGoalMapping = null;
 
             if (lifecycleConfiguration != null) {
                 phaseToGoalMapping = lifecycleConfiguration.getLifecyclePhases();
             } else if (lifecycle.getDefaultLifecyclePhases() != null) {
                 phaseToGoalMapping = lifecycle.getDefaultLifecyclePhases();
             }
 
             if (phaseToGoalMapping != null) {
                 for (Map.Entry<String, LifecyclePhase> goalsForLifecyclePhase : phaseToGoalMapping.entrySet()) {
                     String phase = goalsForLifecyclePhase.getKey();
                     LifecyclePhase goals = goalsForLifecyclePhase.getValue();
                     if (goals != null) {
                         parseLifecyclePhaseDefinitions(plugins, phase, goals);
                     }
                 }
             }
         }
 
         return plugins.keySet();
     }
 
     /**
      * Performs a lookup using Plexus API to make sure we can look up only "visible" (see Maven classloading) components
      * from current module and for example not extensions coming from other modules.
      */
     private LifecycleMapping lookupLifecycleMapping(final String packaging) {
         try {
             return plexusContainer.lookup(LifecycleMapping.class, packaging);
         } catch (ComponentLookupException e) {
             if (e.getCause() instanceof NoSuchElementException) {
                 return null;
             }
             throw new RuntimeException(e);
         }
     }
 
     private void parseLifecyclePhaseDefinitions(Map<Plugin, Plugin> plugins, String phase, LifecyclePhase goals) {
         InputSource inputSource = new InputSource();
         inputSource.setModelId(DEFAULTLIFECYCLEBINDINGS_MODELID);
         InputLocation location = new InputLocation(-1, -1, inputSource);
         location.setLocation(0, location);
 
         List<LifecycleMojo> mojos = goals.getMojos();
         if (mojos != null) {
 
             for (int i = 0; i < mojos.size(); i++) {
                 LifecycleMojo mojo = mojos.get(i);
 
                 GoalSpec gs = parseGoalSpec(mojo.getGoal());
 
                 if (gs == null) {
                     logger.warn(
                             "Ignored invalid goal specification '{}' from lifecycle mapping for phase {}",
                             mojo.getGoal(),
                             phase);
                     continue;
                 }
 
                 Plugin plugin = new Plugin();
                 plugin.setGroupId(gs.groupId);
                 plugin.setArtifactId(gs.artifactId);
                 plugin.setVersion(gs.version);
 
                 plugin.setLocation("", location);
                 plugin.setLocation("groupId", location);
                 plugin.setLocation("artifactId", location);
                 plugin.setLocation("version", location);
 
                 Plugin existing = plugins.get(plugin);
                 if (existing != null) {
                     if (existing.getVersion() == null) {
                         existing.setVersion(plugin.getVersion());
                         existing.setLocation("version", location);
                     }
                     plugin = existing;
                 } else {
                     plugins.put(plugin, plugin);
                 }
 
                 PluginExecution execution = new PluginExecution();
                 execution.setId(getExecutionId(plugin, gs.goal));
                 execution.setPhase(phase);
                 execution.setPriority(i - mojos.size());
                 execution.getGoals().add(gs.goal);
 
                 execution.setLocation("", location);
                 execution.setLocation("id", location);
                 execution.setLocation("phase", location);
                 execution.setLocation("goals", location);
 
                 XmlNode lifecycleConfiguration = mojo.getConfiguration();
                 if (lifecycleConfiguration != null) {
                     execution.setConfiguration(new Xpp3Dom(lifecycleConfiguration));
                 }
 
                 if (mojo.getDependencies() != null) {
                     plugin.setDependencies(mojo.getDependencies());
                 }
                 plugin.getExecutions().add(execution);
             }
         }
     }
 
     private GoalSpec parseGoalSpec(String goalSpec) {
         GoalSpec gs = new GoalSpec();
 
         String[] p = goalSpec.trim().split(":");
 
         if (p.length == 3) {
             // <groupId>:<artifactId>:<goal>
             gs.groupId = p[0];
             gs.artifactId = p[1];
             gs.goal = p[2];
         } else if (p.length == 4) {
             // <groupId>:<artifactId>:<version>:<goal>
             gs.groupId = p[0];
             gs.artifactId = p[1];
             gs.version = p[2];
             gs.goal = p[3];
         } else {
             // invalid
             gs = null;
         }
 
         return gs;
     }
 
     private String getExecutionId(Plugin plugin, String goal) {
         Set<String> existingIds = new HashSet<>();
         for (PluginExecution execution : plugin.getExecutions()) {
             existingIds.add(execution.getId());
         }
 
         String base = "default-" + goal;
         String id = base;
 
         for (int index = 1; existingIds.contains(id); index++) {
             id = base + '-' + index;
         }
 
         return id;
     }
 
     static class GoalSpec {
 
         String groupId;
 
         String artifactId;
 
         String version;
 
         String goal;
     }
 }