/*
    * 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.plugins.site.deploy;
  
  import java.io.File;
  import java.util.List;
  
  import org.apache.maven.model.Site;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Deploys the generated site to a local staging or mock directory based on the site URL
   * specified in the <code>&lt;distributionManagement&gt;</code> section of the
   * POM.
   * <p>It can be used to test that links between module sites in a multi-module
   * build work.
   * </p>
   * <p>This goal requires the site to already have been generated using the site goal,
   * such as by calling <code>mvn site</code>.</p>
   *
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   *
   * @since 2.0
   */
  @Mojo(name = "stage", requiresDependencyResolution = ResolutionScope.TEST)
  public class SiteStageMojo extends AbstractStagingMojo {
      /**
       * Staging directory location. This needs to be an absolute path, like
       * <code>C:\stagingArea\myProject\</code> on Windows or
       * <code>/stagingArea/myProject/</code> on Unix.
       * If this is not specified, the site will be staged in ${project.build.directory}/staging.
       *
       * @since 2.3
       */
      @Parameter(property = "stagingDirectory")
      private File stagingDirectory;
  
      @Override
      public void execute() throws MojoExecutionException {
          if (skip) {
              getLog().info("maven.site.skip = true: Skipping site staging");
              return;
          }
  
          super.execute();
      }
  
      @Override
      protected boolean isDeploy() {
          return false;
      }
  
      @Override
      protected Site determineDeploySite() throws MojoExecutionException {
          Site staging = new Site();
          staging.setId("stagingLocal");
  
          final File outputDirectory = determineStagingDirectory();
          getLog().info("Using this base directory for staging: " + outputDirectory);
  
          // Safety
          if (!outputDirectory.exists()) {
              outputDirectory.mkdirs();
          }
  
          staging.setUrl("file://" + outputDirectory.getAbsolutePath());
  
          return staging;
      }
  
      /**
       * Find the directory where staging will take place.
       *
       * @return the directory for staging
       */
      private File determineStagingDirectory() {
          if (stagingDirectory != null) {
              // the user has specified a stagingDirectory - use it
              getLog().debug("stagingDirectory specified by the user: " + stagingDirectory);
             return stagingDirectory;
         }
 
         // The user didn't specify a URL: calculate default in the execution root target dir
         File defaultStagingDirectory = new File(getExecutionRootBuildDirectory(), DEFAULT_STAGING_DIRECTORY);
         getLog().debug("stagingDirectory NOT specified, using the execution root project: " + defaultStagingDirectory);
         return defaultStagingDirectory;
     }
 
     /**
      * Find the build directory of the execution root project in the reactor.
      * If no execution root project is found, the build directory of the current project is returned.
      *
      * @return the build directory of the execution root project.
      */
     protected File getExecutionRootBuildDirectory() {
         // Find the top level project in the reactor
         final MavenProject executionRootProject = getExecutionRootProject(reactorProjects);
 
         // Use the top level project's build directory if there is one, otherwise use this project's build directory
         final File buildDirectory;
 
         if (executionRootProject == null) {
             getLog().debug("No execution root project found in the reactor, using the current project.");
 
             buildDirectory = new File(project.getBuild().getDirectory());
         } else {
             getLog().debug("Using the execution root project found in the reactor: "
                     + executionRootProject.getArtifactId());
 
             buildDirectory = new File(executionRootProject.getBuild().getDirectory());
         }
 
         return buildDirectory;
     }
 
     /**
      * Find the execution root in the reactor.
      *
      * @param reactorProjects The projects in the reactor. May be <code>null</code> in which case <code>null</code> is
      *            returned.
      * @return The execution root project in the reactor, or <code>null</code> if none can be found
      */
     private static MavenProject getExecutionRootProject(List<MavenProject> reactorProjects) {
         if (reactorProjects == null) {
             return null;
         }
 
         // todo Lambda Java 1.8
         for (MavenProject reactorProject : reactorProjects) {
             if (reactorProject.isExecutionRoot()) {
                 return reactorProject;
             }
         }
         return null;
     }
 }