/*
 * Copyright (C) 2005 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the
 * License.
 */
package org.alfresco.web.bean;

import java.text.MessageFormat;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import javax.transaction.UserTransaction;

import org.alfresco.model.ContentModel;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.TemplateImageResolver;
import org.alfresco.service.cmr.repository.TemplateNode;
import org.alfresco.service.cmr.security.OwnableService;
import org.alfresco.service.cmr.security.PermissionService;
import org.alfresco.web.app.AlfrescoNavigationHandler;
import org.alfresco.web.app.Application;
import org.alfresco.web.bean.repository.Node;
import org.alfresco.web.bean.repository.Repository;
import org.alfresco.web.ui.common.Utils;
import org.alfresco.web.ui.common.Utils.URLMode;
import org.alfresco.web.ui.common.component.UIActionLink;
import org.alfresco.web.ui.common.component.UIPanel.ExpandedEvent;

/**
 * Backing bean provided access to the details of a Space
 * 
 * @author Kevin Roast
 */
public class SpaceDetailsBean extends BaseDetailsBean
{
   private static final String OUTCOME_RETURN = "showSpaceDetails";

   /** PermissionService bean reference */
   protected PermissionService permissionService;
   
   
   // ------------------------------------------------------------------------------
   // Construction
   
   /**
    * Default constructor
    */
   public SpaceDetailsBean()
   {
      // initial state of some panels that don't use the default
      panels.put("rules-panel", false);
   }
   
   
   // ------------------------------------------------------------------------------
   // Bean property getters and setters 
   
   /**
    * @param permissionService      The PermissionService to set.
    */
   public void setPermissionService(PermissionService permissionService)
   {
      this.permissionService = permissionService;
   }
   
   /**
    * Returns the Node this bean is currently representing
    * 
    * @return The Node
    */
   public Node getNode()
   {
      return this.browseBean.getActionSpace();
   }
   
   /**
    * Returns the Space this bean is currently representing
    * 
    * @return The Space Node
    */
   public Node getSpace()
   {
      return getNode();
   }
   
   /**
    * Resolve the actual document Node from any Link object that may be proxying it
    * 
    * @return current document Node or document Node resolved from any Link object
    */
   protected Node getLinkResolvedNode()
   {
      Node space = getSpace();
      if (ContentModel.TYPE_FOLDERLINK.equals(space.getType()))
      {
         NodeRef destRef = (NodeRef)space.getProperties().get(ContentModel.PROP_LINK_DESTINATION);
         space = new Node(destRef);
      }
      return space;
   }
   
   /**
    * Returns a model for use by a template on the Space Details page.
    * 
    * @return model containing current current space info.
    */
   @SuppressWarnings("unchecked")
   public Map getTemplateModel()
   {
      HashMap model = new HashMap(1, 1.0f);
      
      FacesContext fc = FacesContext.getCurrentInstance();
      TemplateNode spaceNode = new TemplateNode(getSpace().getNodeRef(),
              Repository.getServiceRegistry(fc), imageResolver);
      model.put("space", spaceNode);
      
      return model;
   }
   
   /**
    * @see org.alfresco.web.bean.BaseDetailsBean#getPropertiesPanelId()
    */
   protected String getPropertiesPanelId()
   {
      return "space-props";
   }

   /**
    * @see org.alfresco.web.bean.BaseDetailsBean#getReturnOutcome()
    */
   protected String getReturnOutcome()
   {
      return OUTCOME_RETURN;
   }
   
   
   // ------------------------------------------------------------------------------
   // Action event handlers
   
   /**
    * Navigates to next item in the list of Spaces
    */
   public void nextItem(ActionEvent event)
   {
      UIActionLink link = (UIActionLink)event.getComponent();
      Map<String, String> params = link.getParameterMap();
      String id = params.get("id");
      if (id != null && id.length() != 0)
      {
         List<Node> nodes = this.browseBean.getNodes();
         if (nodes.size() > 1)
         {
            // perform a linear search - this is slow but stateless
            // otherwise we would have to manage state of last selected node
            // this gets very tricky as this bean is instantiated once and never
            // reset - it does not know when the document has changed etc.
            for (int i=0; i<nodes.size(); i++)
            {
               if (id.equals(nodes.get(i).getId()) == true)
               {
                  Node next;
                  // found our item - navigate to next
                  if (i != nodes.size() - 1)
                  {
                     next = nodes.get(i + 1);
                  }
                  else
                  {
                     // handle wrapping case
                     next = nodes.get(0);
                  }
                  
                  // prepare for showing details for this node
                  this.browseBean.setupSpaceAction(next.getId(), false);
               }
            }
        }
      }
   }
   
   /**
    * Navigates to the previous item in the list Spaces
    */
   public void previousItem(ActionEvent event)
   {
      UIActionLink link = (UIActionLink)event.getComponent();
      Map<String, String> params = link.getParameterMap();
      String id = params.get("id");
      if (id != null && id.length() != 0)
      {
         List<Node> nodes = this.browseBean.getNodes();
         if (nodes.size() > 1)
         {
            // see above
            for (int i=0; i<nodes.size(); i++)
            {
               if (id.equals(nodes.get(i).getId()) == true)
               {
                  Node previous;
                  // found our item - navigate to previous
                  if (i != 0)
                  {
                     previous = nodes.get(i - 1);
                  }
                  else
                  {
                     // handle wrapping case
                     previous = nodes.get(nodes.size() - 1);
                  }
                  
                  // show details for this node
                  this.browseBean.setupSpaceAction(previous.getId(), false);
               }
            }
         }
      }
   }
   
   /**
    * Action handler to clear the current Space properties before returning to the browse screen,
    * as the user may have modified the properties! 
    */
   public String closeDialog()
   {
      this.navigator.resetCurrentNodeProperties();
      return AlfrescoNavigationHandler.CLOSE_DIALOG_OUTCOME;
   }
}