/**
    * This file Copyright (c) 2015-2016 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.admincentral.shellapp.pulse.task.data;
  
  import info.magnolia.registry.RegistrationException;
  import info.magnolia.task.Task;
  import info.magnolia.task.TasksManager;
  import info.magnolia.task.definition.TaskDefinition;
  import info.magnolia.task.definition.registry.TaskDefinitionRegistry;
  import info.magnolia.ui.admincentral.shellapp.pulse.data.LazyPulseQuery;
  import info.magnolia.ui.admincentral.shellapp.pulse.data.PulseConstants;
  
  import java.util.Date;
  import java.util.List;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.Item;
  import com.vaadin.data.util.ObjectProperty;
  
  /**
   * {@link LazyPulseQuery} implementation which serves {@link Task} objects via {@link TasksManager}.
   */
  public class TaskQuery extends LazyPulseQuery<Task.Status, Task> {
  
      private static final Logger log = LoggerFactory.getLogger(TaskQuery.class);
  
      private TaskDefinitionRegistry taskDefinitionRegistry;
  
      private TasksManager tasksManager;
  
      @Inject
      public TaskQuery(TasksManager tasksManager, TaskDefinitionRegistry taskDefinitionRegistry, TaskQueryDefinition queryDefinition) {
          super(queryDefinition);
          this.tasksManager = tasksManager;
          this.taskDefinitionRegistry = taskDefinitionRegistry;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      protected void mapObjectToItem(Task task, Item item) {
          item.addItemProperty(TaskConstants.ID, new ObjectProperty(task.getId()));
          item.addItemProperty(TaskConstants.STATUS_PROPERTY_ID, new ObjectProperty(task.getStatus()));
          item.addItemProperty(TaskConstants.NEW_PROPERTY_ID, new ObjectProperty(task.getStatus() == Task.Status.Created, Boolean.class));
          item.addItemProperty(TaskConstants.TASK_PROPERTY_ID, new ObjectProperty(getTaskTitle(task), String.class));
          item.addItemProperty(TaskConstants.SENDER_PROPERTY_ID, new ObjectProperty(task.getRequestor(), String.class));
          item.addItemProperty(TaskConstants.LAST_CHANGE_PROPERTY_ID, new ObjectProperty(task.getModificationDate(), Date.class));
  
          item.addItemProperty(TaskConstants.ASSIGNED_TO_PROPERTY_ID, new ObjectProperty(StringUtils.defaultString(task.getActorId()), String.class));
  
          String sentTo = "";
          if (task.getGroupIds() != null && task.getGroupIds().size() > 0) {
              sentTo += StringUtils.join(task.getGroupIds(), ",");
          }
          if (task.getActorIds() != null && task.getActorIds().size() > 0) {
              sentTo += StringUtils.join(task.getActorIds(), ",");
          }
  
          item.addItemProperty(TaskConstants.SENT_TO_PROPERTY_ID, new ObjectProperty(sentTo, String.class));
      }
  
      @Override
      protected long getEntriesAmount(List<Task.Status> types) {
          return tasksManager.getTasksAmountByUserAndStatus(getQueryDefinition().userName(), types);
     }
 
     @Override
     protected List<Task> getEntries(List<Task.Status> types, int limit, int offset) {
         long timeMs = System.currentTimeMillis();
         List<Task> tasksCollection = tasksManager.findTasksByUserAndStatus(getQueryDefinition().userName(), types, getSortCriteria(), limit, offset);
         log.debug("Fetched {} object list from {} in {}ms", limit, offset, System.currentTimeMillis() - timeMs);
         return tasksCollection;
     }
 
     @Override
     protected Task createGroupingEntry(Task.Status type) {
         Task groupingTask = new Task();
         groupingTask.setId(PulseConstants.GROUP_PLACEHOLDER_ITEMID + type.name());
         groupingTask.setStatus(type);
         return groupingTask;
     }
 
     protected String getTaskTitle(Task task) {
         String title = task.getName();
         if (title == null) {
             return null;
         }
 
         try {
             TaskDefinition definition = taskDefinitionRegistry.get(task.getName());
             if (definition != null) {
                 title = definition.getTitle();
             }
         } catch (RegistrationException e) {
             log.error("Could not get task definition for {}.", task.getName(), e);
         }
         String comment = (StringUtils.isNotEmpty(task.getComment())) ? "|" + task.getComment() : "";
         return title + comment;
     }
 }