package org.argeo.connect.ui.widgets;
   
   import java.util.ArrayList;
   import java.util.List;
   import java.util.Map;
   import java.util.Set;
   import java.util.TreeMap;
   import java.util.TreeSet;
   
  import org.argeo.connect.UserAdminService;
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.eclipse.swt.widgets.Text;
  import org.osgi.service.useradmin.User;
  
  /** Drop down that displays the list of existing groups */
  public class GroupDropDown extends ConnectAbstractDropDown {
  	private final UserAdminService userService;
  	private final String groupDn;
  
  	private Map<String, User> userMap = new TreeMap<String, User>();
  
  	/**
  	 * @param text
  	 * @param userAdminService
  	 * @param groupDn
  	 */
  	public GroupDropDown(Text text, UserAdminService userAdminService, String groupDn) {
  		super(text);
  		this.userService = userAdminService;
  		this.groupDn = groupDn;
  		init();
  	}
  
  	public void resetDN(String dn) {
  		if (EclipseUiUtils.notEmpty(dn))
  			reset(userService.getUserDisplayName(dn));
  		else
  			reset("");
  	}
  
  	@Override
  	public String getText() {
  		String groupId = null;
  		String dname = super.getText();
  		if (EclipseUiUtils.notEmpty(dname))
  			groupId = userMap.get(dname).getName();
  		return groupId;
  	}
  
  	@Override
  	protected List<String> getFilteredValues(String filter) {
  		Set<User> users = userService.listUsersInGroup(groupDn, filter);
  		userMap.clear();
  		Set<String> res = new TreeSet<String>();
  
  		for (User user : users) {
  			String dn = user.getName();
  			String userDName = userService.getUserDisplayName(dn);
  			userMap.put(userDName, user);
  			res.add(userDName);
  		}
  		// TODO make order configurable
  		return new ArrayList<>(res);
  	}
  }