/*******************************************************************************

 * Copyright (c) 2004, 2007 Mylyn project committers 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

 *******************************************************************************/

package org.eclipse.mylyn.internal.tasks.ui.dialogs;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.dialogs.IDialogConstants;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.mylyn.tasks.ui.TasksUiPlugin;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Text;

/**

 * @author Frank Becker

 * @author Steffen Pingel

 */

public class EditCredentialsDialog extends Dialog {

	private static final String TITLE = "Enter Password";

	private boolean savePassword;

	private Image keyLockImage;

	private String message;

	private String username = "";

	private String password = "";

	private String url;

	public EditCredentialsDialog(Shell parentShell) {

		super(parentShell);

		setShellStyle(getShellStyle() | SWT.RESIZE);

	}

	public String getUserName() {

		return username;

	}

	public void setUsername(String username) {

		if (username == null) {

			throw new IllegalArgumentException();

		}

		this.username = username;

	}

	public String getPassword() {

		return password;

	}

	public void setPassword(String password) {

		if (password == null) {

			throw new IllegalArgumentException();

		}

		this.password = password;

	}

	public String getMessage() {

		return message;

	}

	public void setMessage(String message) {

		this.message = message;

	}

	public void setUrl(String url) {

		this.url = url;

	}

	public String getUrl() {

		return url;

	}

	public boolean getSavePassword() {

		return savePassword;

	}

	public void setSavePassword(boolean savePassword) {

		this.savePassword = savePassword;

	}

	@Override

	protected Control createDialogArea(Composite parent) {

		getShell().setText(TITLE);

		Composite composite = new Composite(parent, SWT.NONE);

		composite.setLayout(new GridLayout(2, false));

		composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		Label label = new Label(composite, SWT.NONE);

		keyLockImage = TasksUiPlugin.imageDescriptorFromPlugin(TasksUiPlugin.ID_PLUGIN, "icons/wizban/keylock.gif")

				.createImage();

		label.setImage(keyLockImage);

		GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.BEGINNING).applyTo(label);

		createCenterArea(composite);

		Dialog.applyDialogFont(parent);

		return composite;

	}

	private void createCenterArea(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);

		composite.setLayout(new GridLayout(2, false));

		composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		if (message != null) {

			Label label = new Label(composite, SWT.WRAP);

			label.setText(message);

			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).hint(

					convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH), SWT.DEFAULT).grab(true,

					false).span(2, 1).applyTo(label);

			// spacer

			label = new Label(composite, SWT.NONE);

			GridDataFactory.fillDefaults().span(2, 1).applyTo(label);

		}

		if (url != null) {

			Label label = new Label(composite, SWT.WRAP);

			label.setText("Repository:");

			label = new Label(composite, SWT.NONE);

			label.setText(url);

			GridDataFactory.fillDefaults().applyTo(label);

		}

		new Label(composite, SWT.NONE).setText("&User name:");

		final Text usernameField = new Text(composite, SWT.BORDER);

		usernameField.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				username = usernameField.getText();

			}

		});

		usernameField.setText(username);

		if (username.length() == 0) {

			usernameField.setFocus();

		}

		GridDataFactory.fillDefaults()

				.align(SWT.FILL, SWT.CENTER)

				.hint(convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH), SWT.DEFAULT)

				.grab(true, false)

				.applyTo(usernameField);

		new Label(composite, SWT.NONE).setText("&Password:");

		final Text passwordField = new Text(composite, SWT.BORDER | SWT.PASSWORD);

		passwordField.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				password = passwordField.getText();

			}

		});

		passwordField.setText(password);

		if (username.length() > 0) {

			passwordField.setFocus();

		}

		GridDataFactory.fillDefaults()

				.align(SWT.FILL, SWT.CENTER)

				.hint(convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH), SWT.DEFAULT)

				.grab(true, false)

				.applyTo(passwordField);

		final Button savePasswordButton = new Button(composite, SWT.CHECK);

		savePasswordButton.setText("&Save password");

		savePasswordButton.setSelection(savePassword);

		savePasswordButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				savePassword = savePasswordButton.getSelection();

			}

		});

		GridDataFactory.fillDefaults().span(2, 1).applyTo(savePasswordButton);

		createWarningMessage(composite);

	}

	private void createWarningMessage(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);

		GridLayout layout = new GridLayout();

		layout.numColumns = 2;

		layout.marginHeight = 0;

		layout.marginHeight = 0;

		composite.setLayout(layout);

		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).span(2, 1).applyTo(composite);

		Label label = new Label(composite, SWT.NONE);

		label.setImage(getImage(DLG_IMG_MESSAGE_WARNING));

		label.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.HORIZONTAL_ALIGN_BEGINNING));

		label = new Label(composite, SWT.WRAP);

		label.setText("Saved passwords are stored on your computer in a file that is difficult, but not impossible, for an intruder to read.");

		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).hint(

				convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH), SWT.DEFAULT).grab(true,

				false).applyTo(label);

	}

	@Override

	public boolean close() {

		if (keyLockImage != null) {

			keyLockImage.dispose();

		}

		return super.close();

	}

}