package org.ximtec.igesture.tool.view.devicemanager.action;
   
   import java.awt.GridBagConstraints;
   import java.awt.GridBagLayout;
   import java.awt.event.ActionEvent;
   import java.awt.event.ActionListener;
   import java.util.HashMap;
   import java.util.Map;
   import java.util.Set;
  
  import javax.swing.JButton;
  import javax.swing.JComponent;
  import javax.swing.JDialog;
  import javax.swing.JLabel;
  import javax.swing.JList;
  import javax.swing.JOptionPane;
  import javax.swing.event.ListSelectionEvent;
  import javax.swing.event.ListSelectionListener;
  
  import org.sigtec.graphix.widget.BasicAction;
  import org.ximtec.igesture.io.DeviceUserAssociation;
  import org.ximtec.igesture.io.IUser;
  import org.ximtec.igesture.tool.GestureConstants;
  import org.ximtec.igesture.tool.service.GuiBundleService;
  import org.ximtec.igesture.tool.view.devicemanager.DeviceManagerController;
  import org.ximtec.igesture.tool.view.devicemanager.DeviceManagerView;
  
  /**
   * Action to associate a user with a device. It extends {@link org.sigtec.graphix.widget.BasicAction} and implements the {@link javax.swing.event.ListSelectionListener} interface.
   * @author Bjorn Puype, bpuype@gmail.com
   *
   */
  public class AssociateUserAction extends BasicAction implements ListSelectionListener{
  
  	private static final long serialVersionUID = 1L;
  	private DeviceManagerController controller;
  	private DeviceManagerView view;
  	
  	
  	public AssociateUserAction(DeviceManagerController controller, DeviceManagerView view)
  	{
  		this(controller,view,false);
  	}
  	
  	public AssociateUserAction(DeviceManagerController controller, DeviceManagerView view, boolean enabled)
  	{
  		super(GestureConstants.ASSOCIATE_USER, controller.getLocator().getService(
  	            GuiBundleService.IDENTIFIER, GuiBundleService.class));
  		this.controller = controller;
  		this.view = view;
  		setEnabled(enabled);
  	}
  	
  	@Override
  	public void actionPerformed(ActionEvent e) {
  		//creat a dialog
  		final JDialog dlg = new JDialog();
  		dlg.setTitle("Associate User");
  		dlg.setLayout(new GridBagLayout());
  
  		// label
  		add(new JLabel("Select a user:"),dlg,0,0,1);
  		
  		// user list
  		Set<IUser> users = controller.getUsers();
  		final Map<String, IUser> map = new HashMap<String, IUser>();
  		for(IUser user : users)
  		{
  			map.put(user.toString(), user);
  		}
  		
  		//add users to the list.
  		final JList list = new JList(map.keySet().toArray());
  		list.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
  		add(list, dlg, 0, 1, 2);
  		
  		// buttons
  		JButton btnOK = new JButton("OK");
  		final DeviceUserAssociation device = view.getSelectedDevice();
  		btnOK.addActionListener(new ActionListener(){
  
  			@Override
  			public void actionPerformed(ActionEvent e) {
  					if(list.getSelectionModel().isSelectionEmpty())
  						JOptionPane.showMessageDialog(dlg, "Please select a user.", "Warning", JOptionPane.WARNING_MESSAGE);
  					else
  					{
  						IUser user = map.get(list.getSelectedValues()[0]);
  						controller.associateUser(device.getDeviceItem(),user);
  						dlg.setVisible(false);
  						dlg.dispose();
  					}
  			}
  			
  		});
  		add(btnOK,dlg,0,2,1);
  		
  		JButton btnCancel = new JButton("Cancel");
  		btnCancel.addActionListener(new ActionListener(){
 
 			@Override
 			public void actionPerformed(ActionEvent e) {
 				dlg.setVisible(false);
 				dlg.dispose();				
 			}
 			
 		});
 		add(btnCancel,dlg,1,2,1);
 		
 		dlg.pack();
 		dlg.setVisible(true);		
 		
 	}
 	
 	/**
 	 * Add a component to a dialog with a GridBagLayout.
 	 * @param component	The component to add.
 	 * @param dlg		The dialog.
 	 * @param gridx		The x position.
 	 * @param gridy		The y position.
 	 * @param gridwidth	The width of the component expressed in number of columns.
 	 */
 	private void add(JComponent component, JDialog dlg, int gridx, int gridy, int gridwidth)
 	{
 		GridBagConstraints c = new GridBagConstraints();
 		c.fill = GridBagConstraints.HORIZONTAL;
 		c.gridx = gridx;
 		c.gridy = gridy;
 		c.gridwidth = gridwidth;
 		
 		dlg.add(component,c);
 	}
 
 	@Override
 	public void valueChanged(ListSelectionEvent e) {
 		setEnabled(true);
 		//enable the action when something was selected.
 	}
 
 }