/**
    * This file Copyright (c) 2015 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.cache.browser.app;
  
  import info.magnolia.cache.browser.rest.CacheServiceFactory;
  import info.magnolia.cache.browser.rest.client.CacheService;
  import info.magnolia.i18nsystem.I18nizer;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.ui.api.availability.AvailabilityChecker;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.dialog.actionarea.DialogActionExecutor;
  import info.magnolia.ui.dialog.formdialog.FormBuilder;
  import info.magnolia.ui.dialog.formdialog.FormDialogPresenterImpl;
  import info.magnolia.ui.dialog.formdialog.FormView;
  import info.magnolia.ui.dialog.registry.DialogDefinitionRegistry;
  import info.magnolia.ui.vaadin.integration.contentconnector.ContentConnector;
  import info.magnolia.ui.vaadin.overlay.MessageStyleTypeEnum;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import javax.inject.Inject;
  import javax.ws.rs.ClientErrorException;
  import javax.ws.rs.ProcessingException;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.Item;
  
  /**
   * Presenter with custom validation of reachability of subscribers.
   */
  public class CacheFormDialogPresenter extends FormDialogPresenterImpl {
  
      private static final Logger log = LoggerFactory.getLogger(CacheFormDialogPresenter.class);
  
      private final SimpleTranslator i18n;
      private final CacheServiceFactory cacheServiceFactory;
      private final UiContext uiContext;
  
      @Inject
      public CacheFormDialogPresenter(DialogDefinitionRegistry dialogDefinitionRegistry, FormBuilder formBuilder, ComponentProvider componentProvider, DialogActionExecutor executor, FormView view, I18nizer i18nizer, SimpleTranslator i18n, AvailabilityChecker checker, ContentConnector contentConnector, CacheServiceFactory cacheServiceFactory, UiContext uiContext) {
          super(dialogDefinitionRegistry, formBuilder, componentProvider, executor, view, i18nizer, i18n, checker, contentConnector);
          this.i18n = i18n;
          this.cacheServiceFactory = cacheServiceFactory;
          this.uiContext = uiContext;
      }
  
      @Override
      public boolean isValid() {
          boolean valid = super.isValid();
          showValidation(true);
          if (!valid) {
              return false;
          }
          Item item = getView().getItemDataSource();
          String username = (String) item.getItemProperty("username").getValue();
          String password = (String) item.getItemProperty("password").getValue();
          Map<String, CacheService> cacheServices = cacheServiceFactory.createCacheServices(new String[]{username, password});
          List<String> unreachableSubscribers = new ArrayList<>();
          for (Map.Entry<String, CacheService> entry : cacheServices.entrySet()) {
              String subscriberName = entry.getKey();
              CacheService cacheService = entry.getValue();
              try {
                 cacheService.ping();
             } catch (ClientErrorException | ProcessingException e) {
                 log.warn("Subscriber {} rest cache endpoint is not reachable: {}", subscriberName, e.getMessage());
                 log.debug(e.getMessage(), e);
                 unreachableSubscribers.add(subscriberName);
                 valid = false;
             }
         }
         if (!unreachableSubscribers.isEmpty()) {
             uiContext.openNotification(MessageStyleTypeEnum.ERROR, true, i18n.translate("cache-browser-app.restLogin.validation.error", StringUtils.join(unreachableSubscribers.iterator(), ", ")));
         }
         return valid;
     }
 }