package com.onaro.sanscreen.client.error;

import java.util.HashSet;
import java.util.ResourceBundle;
import java.util.Set;

import javax.ejb.EJBAccessException;
import javax.security.auth.login.FailedLoginException;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;

import com.onaro.commons.lang.OnaroExceptionUtils;
import com.onaro.sanscreen.client.FrameDirector;
import com.onaro.sanscreen.client.MainDirector;
import com.onaro.sanscreen.client.Messages;
import com.onaro.sanscreen.client.login.LoginHandler;

/**
 * Handles failure to access unauthorized services in the server. When such an It provide the user with the options to
 * login as another user, to ignore the error (and try again later) or to exit the application.
 */
public class UnauthorizedHandler extends MessageWindowHandler {
   
    //possible known exception causes
    static final Set<Class<? extends Throwable>> knownSecurityExceptions = new HashSet<Class<? extends Throwable>>();
    
    static {
        knownSecurityExceptions.add(SecurityException.class);
        knownSecurityExceptions.add(FailedLoginException.class);
        knownSecurityExceptions.add(EJBAccessException.class);
    }

	static final class LoginAction extends MessageWindowHandler.Action {
		private static final long serialVersionUID = 1L;

		public LoginAction() {
			putValue(Action.NAME, Messages.INSTANCE.getLoginActionText());
		}

		@Override
		public boolean doAction(String shortDescription, Throwable exception) {
			boolean loggedIn = LoginHandler.showDialog();
			if (!loggedIn) return true;

			//todo: move this functionality somewhere else
			final FrameDirector frameDirector = MainDirector.getFrameDirector();
			if (frameDirector != null) {
				SwingUtilities.invokeLater(new Runnable() {
					public void run() {
						frameDirector.showCurrentView();
					}
				});
			}
			
			return true;
		}

	}

	/**
	 * Gets the messages and titles from the resources. Set the options to "exit", "ignore" or "login".
	 * 
	 * @param bundle
	 *            locale dependent resources
	 */
	public UnauthorizedHandler(ResourceBundle bundle) {
		super(bundle.getString("unauthorized.relogin.title"), bundle.getString("unauthorized.relogin.message"), //$NON-NLS-1$ //$NON-NLS-2$
				JOptionPane.WARNING_MESSAGE);

		addActionIgnore();
		addAction(new LoginAction());
	}

	/**
	 * Handle the error if the exception is any kind of <code>SecurityException</code>. When checking for a match,
	 * the chain of causes is also searched.
	 * 
	 */
	@Override
	public boolean handle(String shortDescription, Throwable exception) {
		for (Class<? extends Throwable> knownSecurityException : knownSecurityExceptions) {
			if (OnaroExceptionUtils.isCause(exception, knownSecurityException)) {
				return super.handle(shortDescription, exception);
			}
		}

		return false;
	}
	
	@Override
	protected boolean isLogOnly() {
		return false;
	}
}