/*******************************************************************************
 * Copyright (c) 2004, 2005 Jean-Michel Lemieux, Jeff McAffer and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Hyperbola is an RCP application developed for the book 
 *     Eclipse Rich Client Platform - 
 *         Designing, Coding, and Packaging Java Applications 
 * Addison-Wesley, Summer 2005
 *
 * Contributors:
 *     Jean-Michel Lemieux and Jeff McAffer - initial implementation
 *     Nick Edgar and Pascal Rapicault - additional work for EclipseCon 2005 tutorial
 *         http://www.eclipsecon.org/presentations/EclipseCon2005_Tutorial26.pdf
 *******************************************************************************/
package org.eclipsercp.hyperbola;

import org.eclipse.jface.dialogs.*;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipsercp.hyperbola.model.ConnectionDetails;

/**
 * Login dialog, which prompts for the user's account info, and has Login and Cancel buttons.
 */
public class LoginDialog extends Dialog {

	private Text userIdText;
	private Text serverText;
	private Text passwordText;
	private ConnectionDetails connectionDetails;

	public LoginDialog(Shell parentShell) {
		super(parentShell);
	}

	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);
		String productName = HyperbolaPlugin.getProductName();
		newShell.setText(productName + " Login");
	}

	protected Control createDialogArea(Composite parent) {
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout(2, false);
		composite.setLayout(layout);

		Label accountLabel = new Label(composite, SWT.NONE);
		accountLabel.setText("Account details:");
		accountLabel.setLayoutData(new GridData(GridData.BEGINNING, GridData.CENTER, false, false, 2, 1));

		Label userIdLabel = new Label(composite, SWT.NONE);
		userIdLabel.setText("&User ID:");
		userIdLabel.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));

		userIdText = new Text(composite, SWT.BORDER);
		GridData gridData = new GridData(GridData.FILL, GridData.FILL, true, false);
		gridData.widthHint = convertHeightInCharsToPixels(20);
		userIdText.setLayoutData(gridData);

		Label serverLabel = new Label(composite, SWT.NONE);
		serverLabel.setText("&Server:");
		serverLabel.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));

		serverText = new Text(composite, SWT.BORDER);
		serverText.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, false));

		Label passwordLabel = new Label(composite, SWT.NONE);
		passwordLabel.setText("&Password:");
		passwordLabel.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));

		passwordText = new Text(composite, SWT.BORDER | SWT.PASSWORD);
		passwordText.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, false));

		restoreSettings();

		return composite;
	}

	protected void createButtonsForButtonBar(Composite parent) {
		createButton(parent, IDialogConstants.OK_ID, "Login", true);
		createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	}

	protected void okPressed() {
		String userId = userIdText.getText();
		String server = serverText.getText();
		String password = passwordText.getText();
		if (userId.equals("")) {
			MessageDialog.openError(getShell(), "Invalid User ID", "User ID field must not be blank.");
			return;
		}
		if (server.equals("")) {
			MessageDialog.openError(getShell(), "Invalid Server", "Server field must not be blank.");
			return;
		}
		connectionDetails = new ConnectionDetails(userId, server, password);
		saveSettings();
		super.okPressed();
	}

	/**
	 * Returns the connection details entered by the user, or <code>null
	 * if the dialog was canceled.
	 */
	public ConnectionDetails getConnectionDetails() {
		return connectionDetails;
	}

	private void saveSettings() {
		IDialogSettings settings = HyperbolaPlugin.getDefault().getDialogSettings();
		settings.put("userId", connectionDetails.getUserId());
		settings.put("server", connectionDetails.getServer());
		// should encrypt this or something
		settings.put("password", connectionDetails.getPassword());
	}

	private void restoreSettings() {
		IDialogSettings settings = HyperbolaPlugin.getDefault().getDialogSettings();
		String userId = settings.get("userId");
		String server = settings.get("server");
		String password = settings.get("password");
		if (userId != null)
			userIdText.setText(userId);
		if (server != null)
			serverText.setText(server);
		if (password != null)
			passwordText.setText(password);
	}
}