/**
    * This file Copyright (c) 2020 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.contenttype.chooser;
  
  import static info.magnolia.ui.contenttype.AppWithContentType.CONTENT_TYPE_REFERENCE_PREFIX;
  
  import info.magnolia.config.registry.DefinitionProvider;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.ui.api.app.AppDescriptor;
  import info.magnolia.ui.api.app.registry.AppDescriptorRegistry;
  import info.magnolia.ui.chooser.definition.AppAwareWorkbenchChooserDefinition;
  import info.magnolia.ui.contenttype.ContentTypeAppDescriptor;
  
  import java.util.Optional;
  
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * Chooser definition that dynamically resolves appName for content-type based apps.
   *
   * @param <T> type of items to be chosen
   */
  public class ContentTypeAppAwareWorkbenchChooserDefinition<T> extends AppAwareWorkbenchChooserDefinition<T> {
  
      public static final String SELF_APP_REFERENCE = "self";
  
      private final AppDescriptorRegistry appRegistry;
  
      public ContentTypeAppAwareWorkbenchChooserDefinition() {
          this.appRegistry = Components.getComponent(AppDescriptorRegistry.class);
      }
  
      @Override
      public String getAppName() {
          String appName = super.getAppName();
          if (SELF_APP_REFERENCE.equalsIgnoreCase(appName)) {
              appName = resolveCurrentAppName().orElse(appName);
          } else if (StringUtils.startsWith(appName, CONTENT_TYPE_REFERENCE_PREFIX)) {
              appName = resolveContentTypeAppName(appName).orElse(appName);
          }
          return appName;
      }
  
      private Optional<String> resolveCurrentAppName() {
          return Optional.ofNullable(Components.getComponent(AppDescriptor.class).getName());
      }
  
      private Optional<String> resolveContentTypeAppName(String appName) {
          String contentType = StringUtils.removeStart(appName, CONTENT_TYPE_REFERENCE_PREFIX);
  
          return appRegistry.getAllProviders().stream()
                  .filter(DefinitionProvider::isValid)
                  .map(DefinitionProvider::get)
                  .filter(ContentTypeAppDescriptor.class::isInstance)
                  .map(ContentTypeAppDescriptor.class::cast)
                  .filter(appDescriptor -> StringUtils.equalsIgnoreCase(contentType, appDescriptor.getContentType()))
                  .findFirst()
                  .map(AppDescriptor::getName);
      }
  }