/**
    * This file Copyright (c) 2017-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.cache.ehcache3.setup;
  
  import info.magnolia.cms.core.FileSystemHelper;
  import info.magnolia.init.MagnoliaConfigurationProperties;
  import info.magnolia.init.MagnoliaInitPaths;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractTask;
  import info.magnolia.module.delta.TaskExecutionException;
  import info.magnolia.objectfactory.Components;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.FileSystems;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * Moves disk store to correct location.
   */
  public class MoveDiskStoreDirectoryTask extends AbstractTask {
  
      //javax.management.ObjectName invalid characters
      private static final String CACHE_MANAGER_ID_INVALID_CHARS = "*?=:,\n\"";
      private static final String MAGNOLIA_PROPERTY_CACHE_MANAGER_ID = "magnolia.cache.manager.id";
  
      public MoveDiskStoreDirectoryTask() {
          super("Move disk store to correct location", String.format("Move {%s} to {%s}", getOldDirectory(), getNewDirectory()));
      }
  
      @Override
      public void execute(InstallContext installContext) throws TaskExecutionException {
          final File oldDirectory = getOldDirectory();
          if (oldDirectory.exists()) {
              final File newDirectory = getNewDirectory();
              try {
                  File oldParent = new File(oldDirectory.getParent());
                  FileUtils.moveDirectory(oldDirectory, newDirectory);
  
                  while (oldParent != newDirectory.getParentFile()) {
                      if (oldParent.listFiles().length == 0) {
                          FileUtils.deleteDirectory(oldParent);
                          oldParent = oldParent.getParentFile();
                      } else {
                          break;
                      }
                  }
              } catch (IOException e) {
                  installContext.error(String.format("Can't move cache store {%s} to correct location {%s} due to {%s}. Please stop the webapp and move the directory manually.", oldDirectory, newDirectory, e.getMessage()), e);
              }
          }
      }
  
      static File getOldDirectory() {
          return new File(getCacheDirectoryPath() + getCacheManagerIdentifier());
      }
  
      static File getNewDirectory() {
          return new File(getCacheDirectoryPath() + Components.getComponent(MagnoliaInitPaths.class).getContextPath());
      }
  
      private static String getCacheDirectoryPath() {
          String path = Components.getComponent(MagnoliaConfigurationProperties.class).getProperty(MagnoliaConfigurationProperties.MAGNOLIA_CACHE_STARTDIR);
          File dir = FileSystems.getDefault().getPath(path).isAbsolute() ? new File(path) : new File(Components.getComponent(FileSystemHelper.class).getAppRootDir(), path);
          dir.mkdirs();
          return dir.getAbsolutePath();
     }
 
     private static String getCacheManagerIdentifier() {
         final MagnoliaConfigurationProperties magnoliaConfigurationProperties = Components.getComponent(MagnoliaConfigurationProperties.class);
         if (magnoliaConfigurationProperties.hasProperty(MAGNOLIA_PROPERTY_CACHE_MANAGER_ID)) {
             return magnoliaConfigurationProperties.getProperty(MAGNOLIA_PROPERTY_CACHE_MANAGER_ID);
         } else {
             return StringUtils.replaceChars(Components.getComponent(MagnoliaInitPaths.class).getRootPath(), CACHE_MANAGER_ID_INVALID_CHARS, "-");
         }
     }
 }