/*
    * 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.help;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Displays a list of the profiles which are currently active for this build.
   *
   * @since 2.0
   */
  @Mojo(name = "active-profiles", aggregator = true)
  public class ActiveProfilesMojo extends AbstractHelpMojo {
      // ----------------------------------------------------------------------
      // Mojo parameters
      // ----------------------------------------------------------------------
  
      /**
       * This is the list of projects currently slated to be built by Maven.
       */
      @Parameter(defaultValue = "${reactorProjects}", required = true, readonly = true)
      private List<MavenProject> projects;
  
      // ----------------------------------------------------------------------
      // Public methods
      // ----------------------------------------------------------------------
  
      /** {@inheritDoc} */
      public void execute() throws MojoExecutionException {
          StringBuilder message = new StringBuilder();
  
          for (MavenProject project : projects) {
              getActiveProfileStatement(project, message);
  
              message.append(LS).append(LS);
          }
  
          if (output != null) {
              StringBuilder sb = new StringBuilder();
              sb.append("Generated by Maven Help Plugin").append(LS);
              sb.append("See: https://maven.apache.org/plugins/maven-help-plugin/")
                      .append(LS)
                      .append(LS);
              sb.append(message.toString());
  
              try {
                  writeFile(output, sb);
              } catch (IOException e) {
                  throw new MojoExecutionException("Cannot write active profiles to output: " + output, e);
              }
  
              getLog().info("Active profile report written to: " + output);
          } else {
              getLog().info(message);
          }
      }
  
      // ----------------------------------------------------------------------
      // Private methods
      // ----------------------------------------------------------------------
  
      /**
       * Method to get the active profiles for the project
       *
       * @param project   the current project
       * @param message   the object where the information will be appended to
       */
      private void getActiveProfileStatement(MavenProject project, StringBuilder message) {
          Map<String, List<String>> activeProfileIds = project.getInjectedProfileIds();
  
          message.append(LS);
          message.append("Active Profiles for Project '").append(project.getId()).append("':");
          message.append(LS).append(LS);
  
          if (activeProfileIds.isEmpty()) {
              message.append("There are no active profiles.");
         } else {
             message.append("The following profiles are active:").append(LS);
 
             for (Map.Entry<String, List<String>> entry : activeProfileIds.entrySet()) {
                 for (String profileId : entry.getValue()) {
                     message.append(LS).append(" - ").append(profileId);
                     message.append(" (source: ").append(entry.getKey()).append(")");
                 }
             }
         }
 
         message.append(LS);
     }
 }