/*
    * Copyright (C) 2003-2009 eXo Platform SAS.
    *
    * This program is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Affero General Public License
    * as published by the Free Software Foundation; either version 3
    * of the License, or (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see<http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.social.webui.space;
  
  import java.util.Iterator;
  import java.util.ResourceBundle;
  
  import org.exoplatform.services.organization.Group;
  import org.exoplatform.services.security.ConversationState;
  import org.exoplatform.services.security.MembershipEntry;
  import org.exoplatform.social.core.space.SpaceUtils;
  import org.exoplatform.social.webui.UISocialGroupSelector;
  import org.exoplatform.webui.application.WebuiRequestContext;
  import org.exoplatform.webui.config.annotation.ComponentConfig;
  import org.exoplatform.webui.config.annotation.ComponentConfigs;
  import org.exoplatform.webui.config.annotation.EventConfig;
  import org.exoplatform.webui.core.UIContainer;
  import org.exoplatform.webui.core.UIPopupWindow;
  import org.exoplatform.webui.event.Event;
  import org.exoplatform.webui.event.Event.Phase;
  import org.exoplatform.webui.event.EventListener;
  import org.exoplatform.webui.form.UIFormInputInfo;
  import org.exoplatform.webui.form.input.UICheckBoxInput;
  
  @ComponentConfigs({
    @ComponentConfig(
      template = "war:/groovy/social/webui/space/UISpaceGroupBound.gtmpl",
      events = {@EventConfig(listeners = UISpaceGroupBound.SelectGroupActionListener.class, phase=Phase.DECODE) }
    ),
    @ComponentConfig(
      type = UIPopupWindow.class,
      id = "SelectGroup",
      template =  "system:/groovy/webui/core/UIPopupWindow.gtmpl",
      events = @EventConfig(listeners = UISpaceGroupBound.ClosePopupActionListener.class, name = "ClosePopup")
   )
  })
  
  public class UISpaceGroupBound extends UIContainer {
    private final String USE_EXISTING_GROUP = "UseExistingGroupCheckBox";
    private final String POPUP_GROUP_BOUND = "UIPopupGroupBound";
    private final String SELECTED_GROUP = "groupId";
    private final String ANY_MEMBERSHIP_TYPE = "*";
  
    /** Html attribute title. */
    private static final String HTML_ATTRIBUTE_TITLE   = "title";
    
    /**
     * constructor
     * @throws Exception
     */
    public UISpaceGroupBound() throws Exception {
      WebuiRequestContext requestContext = WebuiRequestContext.getCurrentInstance();
      ResourceBundle resourceBundle = requestContext.getApplicationResourceBundle();
      UICheckBoxInput uiUseExisting = new UICheckBoxInput(USE_EXISTING_GROUP, null, false);
      uiUseExisting.setHTMLAttribute(HTML_ATTRIBUTE_TITLE, resourceBundle.getString("UISpaceGroupBound.label.useExistingGroup"));
      uiUseExisting.setId(USE_EXISTING_GROUP);
      uiUseExisting.setOnChange("ToggleUseGroup");
      addChild(uiUseExisting);
      
      UIFormInputInfo uiFormInputInfo = new UIFormInputInfo(SELECTED_GROUP, null, null);
      uiFormInputInfo.setId(SELECTED_GROUP);
      addChild(uiFormInputInfo);
      UIPopupWindow uiPopup = createUIComponent(UIPopupWindow.class, "SelectGroup", POPUP_GROUP_BOUND);
      uiPopup.setWindowSize(550, 0);
      addChild(uiPopup);
    }
  
    /**
     * gets selected group from group bound
     * @return selected group
     */
    @SuppressWarnings("unchecked")
    public String getSelectedGroup() {
      UICheckBoxInput uiCheckBox = getChild(UICheckBoxInput.class);
      if(uiCheckBox.isChecked()) {
        UIFormInputInfo uiInfo = getChild(UIFormInputInfo.class);
        return uiInfo.getValue();
      }
      return null;
    }
  
    /**
     * Check current user is manager of group or not.
     * 
     * @return True if current user has one group that he is manager of that group.
    * @throws Exception
    */
   protected boolean hasGroupWithManagerRole() throws Exception {
     String adminMSType = SpaceUtils.getUserACL().getAdminMSType();
 
     Iterator<MembershipEntry> iter = ConversationState.getCurrent().getIdentity().getMemberships().iterator();
     while (iter.hasNext()) {
       String msType = iter.next().getMembershipType();
       // has any or super membership type
       if (ANY_MEMBERSHIP_TYPE.equals(msType) || adminMSType.equals(msType)) {
         return true;
       }
     }
 
     return false;
   }
 
   /**
    * triggers this action when user clicks on select group on UIGroupSelector
    */
   static public class SelectGroupActionListener extends EventListener<UISocialGroupSelector> {
     public void execute(Event<UISocialGroupSelector> event) throws Exception {
       WebuiRequestContext context = event.getRequestContext();
       String groupId = context.getRequestParameter(OBJECTID);
       UISocialGroupSelector uiGroupSelector = event.getSource();
       UISpaceGroupBound uiGroupBound = uiGroupSelector.getAncestorOfType(UISpaceGroupBound.class);
       UIFormInputInfo uiFormInputInfo = uiGroupBound.getChild(UIFormInputInfo.class);
       uiFormInputInfo.setValue(groupId);
       event.getRequestContext().addUIComponentToUpdateByAjax(uiGroupBound);
     }
   }
 
   /**
    * Check if user selected a group or  not when closing the popup,
    * if not un-check the checked check box
    */
   static public class ClosePopupActionListener extends EventListener<UIPopupWindow> {
     @SuppressWarnings("unchecked")
     @Override
     public void execute(Event<UIPopupWindow> event) throws Exception {
       UIPopupWindow uiPopup = event.getSource();
       UISpaceGroupBound uiGroupBound = uiPopup.getAncestorOfType(UISpaceGroupBound.class);
       UISocialGroupSelector uiGroupSelector = (UISocialGroupSelector)uiPopup.getUIComponent();
       Group group = uiGroupSelector.getCurrentGroup();
       if (group == null) {
         UICheckBoxInput uiUseExisting = uiGroupBound.getChild(UICheckBoxInput.class);
         uiUseExisting.setChecked(false);
       } else {
         UIFormInputInfo uiSelected = uiGroupBound.getChild(UIFormInputInfo.class);
         uiSelected.setValue(group.getId());
       }
       uiPopup.setShow(false);
     }
   }
 }