/**
    * 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.task.app.actions;
  
  import info.magnolia.cms.security.SecuritySupport;
  import info.magnolia.cms.security.User;
  import info.magnolia.cms.security.UserManager;
  import info.magnolia.context.Context;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.task.Task;
  import info.magnolia.task.TasksManager;
  import info.magnolia.ui.api.action.AbstractAction;
  import info.magnolia.ui.api.message.Message;
  import info.magnolia.ui.api.message.MessageType;
  import info.magnolia.ui.ValueContext;
  import info.magnolia.ui.framework.message.MessagesManager;
  
  import java.util.HashSet;
  import java.util.Map;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.vaadin.ui.Notification;
  
  /**
   * {@link ClaimTasksAction} allows the current {@link User user} for claiming
   * a set of tasks for himself via {@link TasksManager}. Should the operation be executed successfully for
   * all the tasks - a corresponding notification message is displayed.
   *
   * @see TasksManager
   */
  public class ClaimTasksAction extends AbstractAction<ClaimTasksActionDefinition> {
  
      private final Context context;
      private final TasksManager tasksManager;
      private final MessagesManager messagesManager;
      private final SimpleTranslator i18n;
      private final SecuritySupport securitySupport;
      private final ValueContext<Task> valueContext;
  
      @Inject
      public ClaimTasksAction(final ClaimTasksActionDefinition definition, final TasksManager taskManager, Context context, MessagesManager messagesManager, SimpleTranslator i18n, SecuritySupport securitySupport, ValueContext<Task> valueContext) {
          super(definition);
          this.tasksManager = taskManager;
          this.context = context;
          this.messagesManager = messagesManager;
          this.i18n = i18n;
          this.securitySupport = securitySupport;
          this.valueContext = valueContext;
      }
  
      @Override
      public void execute() {
          final String userId = context.getUser().getName();
          valueContext.current().update(tasks -> {
              tasks.forEach(task -> {
                  switch (task.getStatus()) {
                  case Created:
                      tasksManager.claim(task.getId(), userId);
                      Notification.show(getDefinition().getSuccessMessage(), Notification.Type.HUMANIZED_MESSAGE);
                      break;
  
                  case InProgress:
                      tasksManager.claim(task.getId(), userId);
                      Notification.show(getDefinition().getSuccessMessage(), Notification.Type.HUMANIZED_MESSAGE);
  
                     if (getDefinition().isNotifyPreviousAssignee()) {
                         notifyPreviousAssignee(task, userId);
                     }
                     break;
 
                 default:
                     break;
 
                 }
             });
             return new HashSet<>();
         });
     }
 
     private void notifyPreviousAssignee(Task task, String userId) {
         if (task.getContent() != null) {
             Map<String, Object> taskContent = task.getContent();
             String repository = taskContent.containsKey("repository") ? taskContent.get("repository").toString() : "";
             String path = taskContent.containsKey("path") ? taskContent.get("path").toString() : "";
             Message message = new Message(MessageType.INFO, i18n.translate("tasks.reclaim.subject"), i18n.translate("tasks.reclaim.message", getTaskName(task), repository, path, getUsername(userId)));
             messagesManager.sendMessage(task.getActorId(), message);
         }
     }
 
     private String getUsername(String userId) {
         UserManager userManager = securitySupport.getUserManager();
         User user = userManager.getUser(userId);
         return StringUtils.isNotEmpty(user.getProperty("title")) ? user.getProperty("title") : userId;
     }
 
     private String getTaskName(Task task) {
         String taskNameKey = "tasks.reclaim." + task.getName();
         String taskName = i18n.translate(taskNameKey);
         return taskNameKey.equals(taskName) ? String.format("'%s'", task.getName()) : taskName;
     }
 }