/**
    * This file Copyright (c) 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.ui.framework.setup;
  
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  
  import java.io.InputStream;
  import java.util.Map;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  import org.apache.commons.lang3.StringUtils;
  import org.yaml.snakeyaml.Yaml;
  
  /**
   * Task that removes specified JCR field type definitions from a module.
   */
  public class RemoveFieldTypeDefinitionsFromJcrTask extends AbstractRepositoryTask {
  
      private static final String FIELD_TYPES_NODE = "fieldTypes";
      private static final String DEFINITION_CLASS_PROPERTY = "definitionClass";
      private static final String FACTORY_CLASS_PROPERTY = "factoryClass";
  
      private static final Yaml YAML = new Yaml();
  
      private final String modulePath;
  
      private final Map<String, String> jcrFieldTypes;
  
      public RemoveFieldTypeDefinitionsFromJcrTask(String modulePath, Map<String, String> jcrFieldTypes) {
          super("Remove field type definitions from JCR", String.format("Remove JCR field type definitions from %s module as they are now being moved to YAML", StringUtils.substringAfterLast(modulePath, "/")));
          this.modulePath = modulePath;
          this.jcrFieldTypes = jcrFieldTypes;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public void execute(InstallContext ctx) throws TaskExecutionException {
          super.execute(ctx);
      }
  
      @Override
      protected void doExecute(InstallContext ctx) throws RepositoryException {
          Session session = ctx.getConfigJCRSession();
          if (session.nodeExists(modulePath)) {
              Node moduleNode = session.getNode(modulePath);
              if (moduleNode.hasNode(FIELD_TYPES_NODE)) {
                  Node fieldTypesNode = moduleNode.getNode(FIELD_TYPES_NODE);
                  for (Map.Entry<String, String> entry : jcrFieldTypes.entrySet()) {
                      if (fieldTypesNode.hasNode(entry.getKey())) {
                          Node oldFieldType = fieldTypesNode.getNode(entry.getKey());
                          InputStream stream = getClass().getResourceAsStream(String.format("/%s/fieldTypes/%s.yaml", StringUtils.substringAfterLast(modulePath, "/"), entry.getValue()));
                          if (stream != null) {
                              Map<String, String> newDefinition = YAML.load(stream);
  
                              if (oldFieldType.hasProperty(DEFINITION_CLASS_PROPERTY) && !oldFieldType.getProperty(DEFINITION_CLASS_PROPERTY).getString().equals(newDefinition.get(DEFINITION_CLASS_PROPERTY))) {
                                  ctx.warn(String.format("Field type definition class is different from default one. Expected: [%s], got: [%s] in [%s].", newDefinition.get(DEFINITION_CLASS_PROPERTY), oldFieldType.getProperty(DEFINITION_CLASS_PROPERTY).getString(), entry.getKey()));
                              }
  
                              if (oldFieldType.hasProperty(FACTORY_CLASS_PROPERTY) && !oldFieldType.getProperty(FACTORY_CLASS_PROPERTY).getString().equals(newDefinition.get(FACTORY_CLASS_PROPERTY))) {
                                  ctx.warn(String.format("Field type factory class is different from default one. Expected: [%s], got: [%s] in [%s].", newDefinition.get(FACTORY_CLASS_PROPERTY), oldFieldType.getProperty(FACTORY_CLASS_PROPERTY).getString(), entry.getKey()));
                              }
                          }
                          oldFieldType.remove();
                     }
                 }
 
                 if (!fieldTypesNode.hasNodes()) {
                     fieldTypesNode.remove();
                 }
             }
         }
     }
 }