/*******************************************************************************
 * Copyright (c) 2005-2008 Polarion Software.
 * 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
 *
 * Contributors:
 *    Sergiy Logvin - Initial API and implementation
 *******************************************************************************/

package org.eclipse.team.svn.ui.composite;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
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.Event;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.eclipse.team.svn.core.resource.SSLSettings;
import org.eclipse.team.svn.ui.SVNUIMessages;
import org.eclipse.team.svn.ui.dialog.DefaultDialog;
import org.eclipse.team.svn.ui.verifier.AbstractVerifierProxy;
import org.eclipse.team.svn.ui.verifier.ExistingResourceVerifier;
import org.eclipse.team.svn.ui.verifier.IValidationManager;

/**
 * SSL Host properties editor panel
 *
 * @author Sergiy Logvin
 */
public class SSLComposite extends Composite implements IPropertiesPanel {
	protected boolean callback;
	
	protected Button enableAuthenticationCheckBox;
	protected Text certificateFileText;
	protected Button browseButton;
	protected Text certificatePassphraseText;
	protected Button savePassphraseCheckBox;
	
	protected IValidationManager validationManager;
	
	protected SSLSettings credentialsInput;

	public SSLComposite(Composite parent, int style, IValidationManager validationManager) {
		this(parent, style, validationManager, false);
	}
	
	public SSLComposite(Composite parent, int style, IValidationManager validationManager, boolean callback) {
		super(parent, style);
		this.validationManager = validationManager;
		this.callback = callback;
		this.credentialsInput = new SSLSettings();
	}

	public SSLSettings getSSLSettingsDirect() {
		SSLSettings settings = new SSLSettings();
		this.getSSLSettingsDirectImpl(settings);
		return settings;
	}
	
	public void setSSLSettingsDirect(SSLSettings settings) {
		this.savePassphraseCheckBox.setSelection(settings.isPassPhraseSaved());
		this.enableAuthenticationCheckBox.setSelection(settings.isAuthenticationEnabled());
		String text = settings.getPassPhrase();
		this.certificatePassphraseText.setText(text == null ? "" : text); //$NON-NLS-1$
		text = settings.getCertificatePath();
		this.certificateFileText.setText(text == null ? "" : text); //$NON-NLS-1$
		
		if (this.callback) {
			if (text != null && text.length() > 0) {
				this.certificatePassphraseText.setFocus();
				this.certificatePassphraseText.selectAll();
			}
			else {
				this.certificateFileText.setFocus();
			}
		}
		
		this.refreshControlsEnablement();
	}
	
	public void initialize() {
		GridLayout layout = null;
		GridData data = null;
		
		layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 7;
		layout.verticalSpacing = 3;
		data = new GridData(GridData.FILL_BOTH);
		this.setLayout(layout);
		this.setLayoutData(data);
		
		this.enableAuthenticationCheckBox = new Button(this, SWT.CHECK);
		data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		data.horizontalSpan = 2;
		this.enableAuthenticationCheckBox.setLayoutData(data);
		this.enableAuthenticationCheckBox.setText(SVNUIMessages.SSLComposite_EnableAuthentication);
		this.enableAuthenticationCheckBox.addSelectionListener(new SelectionListener() {			
			public void widgetSelected(SelectionEvent e) {
				SSLComposite.this.refreshControlsEnablement();
			}
			public void widgetDefaultSelected(SelectionEvent e) {			
			}			
		});
		
		Group group = new Group(this, SWT.NONE);
		group.setText(SVNUIMessages.SSLComposite_ClientCertificate);
		layout = new GridLayout();
		layout.verticalSpacing = 12;
		group.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.horizontalSpan = 2;
		group.setLayoutData(data);
		
		Composite fileAndPassphrase = new Composite(group, SWT.NONE);
		layout = new GridLayout();
		layout.marginHeight = layout.marginWidth = 0;
		layout.numColumns = 2;
		fileAndPassphrase.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL);
		fileAndPassphrase.setLayoutData(data);
		
		Label description = new Label(fileAndPassphrase, SWT.NULL);
		data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		description.setLayoutData(data);
		description.setText(SVNUIMessages.SSLComposite_File);
		
		Composite inner = new Composite(fileAndPassphrase, SWT.FILL);
		layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = layout.marginWidth = 0;
		inner.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL);
		inner.setLayoutData(data);
		
		this.certificateFileText = new Text(inner, SWT.BORDER);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
		this.certificateFileText.setLayoutData(data);
		this.validationManager.attachTo(this.certificateFileText, new AbstractVerifierProxy(new ExistingResourceVerifier(SVNUIMessages.SSLComposite_File_Verifier, true)) {
			protected boolean isVerificationEnabled(Control input) {
				return SSLComposite.this.enableAuthenticationCheckBox.getSelection();
			}
		});
		
		this.browseButton = new Button (inner, SWT.PUSH);
		this.browseButton.setText(SVNUIMessages.Button_Browse);
		data = new GridData(GridData.HORIZONTAL_ALIGN_END);	
		data.widthHint = DefaultDialog.computeButtonWidth(this.browseButton);
		this.browseButton.setLayoutData(data);
		this.browseButton.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event event) {
				FileDialog fileDialog = new FileDialog(SSLComposite.this.getShell(), SWT.OPEN);
				String res = fileDialog.open();
				if (res != null) {
					SSLComposite.this.certificateFileText.setText(res);
					SSLComposite.this.validationManager.validateContent();
				}
			}
		});
				
		description = new Label(fileAndPassphrase, SWT.NULL);
		data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		description.setLayoutData(data);
		description.setText(SVNUIMessages.SSLComposite_Passphrase);
		
		this.certificatePassphraseText = new Text(fileAndPassphrase, SWT.BORDER | SWT.PASSWORD);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
		this.certificatePassphraseText.setLayoutData(data);
		
		inner = new Composite(group, SWT.FILL);
		layout = new GridLayout();
		layout.marginHeight = layout.marginWidth = 0;
		inner.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.horizontalSpan = 2;
		inner.setLayoutData(data);
		
		this.savePassphraseCheckBox = new Button(inner, SWT.CHECK);
		this.savePassphraseCheckBox.setText(SVNUIMessages.SSLComposite_SavePassphrase);
		
		new SecurityWarningComposite(inner);
	}
	
	public void setCredentialsInput(SSLSettings input) {
		this.credentialsInput = input;
	}

	public void saveChanges() {
		this.getSSLSettingsDirectImpl(this.credentialsInput);
	}

	public void resetChanges() {
		this.setSSLSettingsDirect(this.credentialsInput);
	}

	public void cancelChanges() {
		
	}

	protected void getSSLSettingsDirectImpl(SSLSettings settings) {
		settings.setAuthenticationEnabled(this.enableAuthenticationCheckBox.getSelection());
		settings.setCertificatePath(this.certificateFileText.getText());
		settings.setPassPhrase(this.certificatePassphraseText.getText());
		settings.setPassPhraseSaved(this.savePassphraseCheckBox.getSelection());
	}
	
	protected void refreshControlsEnablement() {
		boolean enabled = this.enableAuthenticationCheckBox.getSelection();
		this.certificateFileText.setEnabled(enabled);
		this.browseButton.setEnabled(enabled);
		this.certificatePassphraseText.setEnabled(enabled);
		this.savePassphraseCheckBox.setEnabled(enabled);
		
		this.validationManager.validateContent();
	}

}