/*
* LoginDialog.java - FTP login dialog
* :tabSize=8:indentSize=8:noTabs=false:
* :folding=explicit:collapseFolds=1:
*
* Copyright (C) 2000 Slava Pestov
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package ftp;

import java.awt.Component;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.EmptyBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import org.gjt.sp.jedit.GUIUtilities;
import org.gjt.sp.jedit.jEdit;
import org.gjt.sp.jedit.gui.EnhancedDialog;
import org.gjt.sp.jedit.gui.HistoryTextField;
import org.gjt.sp.jedit.gui.VariableGridLayout;

public class LoginDialog extends EnhancedDialog implements ActionListener
{
	//{{{ LoginDialog constructor
	public LoginDialog(Component comp, boolean _secure, String host, String user, String password)
	{
		super(JOptionPane.getFrameForComponent(comp),
			jEdit.getProperty(_secure ? "login.title-sftp" : "login.title-ftp"), true);
		this.secure = _secure;
		
		JPanel content = new JPanel(new VariableGridLayout(VariableGridLayout.FIXED_NUM_COLUMNS,1,6,6));
		content.setBorder(new EmptyBorder(12,12,12,12));
		setContentPane(content);
		
		content.add(createFieldPanel(secure,host,user,password));

		useProxy = new JCheckBox(
				jEdit.getProperty(secure ? "login.useProxy" : "login.useProxyHttp"), 
				jEdit.getBooleanProperty("vfs.ftp.useProxy", false)
		);
		
		if(!secure) {
			passive = new JCheckBox(jEdit.getProperty("login.passive"),
				jEdit.getBooleanProperty("vfs.ftp.passive"));
			
			passive.addItemListener(new ItemListener() {
				public void itemStateChanged(ItemEvent e) {
					useProxy.setEnabled(passive.isSelected());
				}
			});

			useProxy.setEnabled(passive.isSelected());
			content.add(passive);
		}
		
		
		content.add(useProxy);
			

		storePassword = new JCheckBox(jEdit.getProperty("login.storePassword"),
			jEdit.getBooleanProperty("vfs.ftp.storePassword"));
		content.add(storePassword);
		
		
		Box buttons = new Box(BoxLayout.X_AXIS);
		buttons.add(Box.createGlue());
		ok = new JButton(jEdit.getProperty("common.ok"));
		ok.addActionListener(this);
		getRootPane().setDefaultButton(ok);
		buttons.add(ok);
		buttons.add(Box.createHorizontalStrut(6));
		cancel = new JButton(jEdit.getProperty("common.cancel"));
		cancel.addActionListener(this);
		buttons.add(cancel);
		buttons.add(Box.createGlue());
		
		content.add(buttons);
		
		JTextField focus;
		if(host == null)
			focus = hostField;
		else if(user == null)
			focus = userField;
		else
			focus = passwordField;
		GUIUtilities.requestFocus(this,focus);
		
		pack();
		setLocationRelativeTo(comp);
		setModal(true);
		
	} //}}}
	
	//{{{ ok() method
	public void ok()
	{
		hostField.addCurrentToHistory();
		userField.addCurrentToHistory();
		if (privateKeyField!=null) {
			privateKeyField.addCurrentToHistory();
		}
		
		if(passive != null)
			jEdit.setBooleanProperty("vfs.ftp.passive",passive.isSelected());
		if(storePassword != null)
			jEdit.setBooleanProperty("vfs.ftp.storePassword",storePassword.isSelected());
		if (useProxy != null)
			jEdit.setBooleanProperty("vfs.ftp.useProxy",useProxy.isSelected());
		
		if(hostField.hasFocus() && userField.getText().length() == 0)
			userField.requestFocus();
		else if(userField.hasFocus() && passwordField.getPassword().length == 0)
			passwordField.requestFocus();
		// Allow empty passwords (Bug #1802173)
		//else if (privateKeyField == null && passwordField.getPassword().length == 0)
		//	return;
		else if (passwordField.getPassword().length == 0 && privateKeyField != null && privateKeyField.getText().length() == 0)
			return;
		else
		{
			host = hostField.getText();
			user = userField.getText();
			if (privateKeyField!=null && privateKeyField.getText().length() > 0) {
				//try{
					//SshPrivateKeyFile file = SshPrivateKeyFile.parse(new File(privateKeyField.getText()));
					//if (file.isPassphraseProtected()) {
					//	Log.log(Log.DEBUG, this, "Key File is password protected.");
					//	PassphraseDialog ppd = new PassphraseDialog(jEdit.getActiveView());
					//	Point p  = this.getLocation();
					//	Dimension s = this.getSize();
					//	Dimension ppds = ppd.getSize();
					//	ppd.setLocation((int)(p.x + s.width/2 - ppds.width/2), (int)(p.y + s.height/2 - ppds.height/2));
					//	ppd.setMessage(jEdit.getProperty("login.privatekeypassword"));
					//	ppd.setVisible(true);
					//	if (ppd.isCancelled())
					//		return;
					//	privateKey = file.toPrivateKey(new String(ppd.getPassphrase()));
					//} else {
					//	privateKey = file.toPrivateKey(null);
					//}
					privateKeyFilename = privateKeyField.getText();
					
				//} catch (InvalidSshKeyException iske) {
				//	GUIUtilities.error(this,"vfs.sftp.invalid-privatekey",new Object[] {iske.getMessage()});
				//	return;
				//} catch (IOException ioe) {
				//	GUIUtilities.error(this,"vfs.sftp.invalid-privatekey",new Object[] {ioe.getMessage()});
				//	return;
				//}
				
			}
			if(host.length() == 0 || user.length() == 0)
			{
				getToolkit().beep();
				return;
			}
			password = new String(passwordField.getPassword());
			isOK = true;
			dispose();
		}
	} //}}}
	
	//{{{ cancel() method
	public void cancel()
	{
		dispose();
	} //}}}
	
	//{{{ isOK() method
	public boolean isOK()
	{
		return isOK;
	} //}}}
	
	//{{{ getHost() method
	public String getHost()
	{
		return host;
	} //}}}
	
	//{{{ getUser() method
	public String getUser()
	{
		return user;
	} //}}}
	
	//{{{ getPassword() method
	public String getPassword()
	{
		return password;
	} //}}}
	
	//{{{ getPrivateKeyFilename() method
	public String getPrivateKeyFilename()
	{
		return privateKeyFilename;
	} //}}}
	
	//{{{ actionPerformed() method
	public void actionPerformed(ActionEvent evt)
	{
		Object source = evt.getSource();
		if(source == ok)
			ok();
		else if(source == cancel)
			cancel();
		else if(source == hostField)
			userField.requestFocus();
		else if(source == userField)
			passwordField.requestFocus();
		else if(source == passwordField)
			ok();
		else if(source == privateKeyField)
			ok();
	} //}}}
	
	//{{{ Private members
	private HistoryTextField hostField;
	private HistoryTextField userField;
	private JPasswordField passwordField;
	private HistoryTextField privateKeyField;
	private JButton privateKeySelect;
	private JCheckBox passive;
	private JCheckBox storePassword;
	private JCheckBox useProxy;
	private String host;
	private String user;
	private String password;
	private String privateKeyFilename;
	private boolean isOK;
	private boolean secure;
	private JButton ok;
	private JButton cancel;
	
	//{{{ createFieldPanel() method
	private JPanel createFieldPanel(boolean secure, String host, String user, String password)
	{
		JPanel panel = new JPanel(new VariableGridLayout(
		VariableGridLayout.FIXED_NUM_COLUMNS,2,6,6));
		
		JLabel label = new JLabel(jEdit.getProperty("login.host"),
		SwingConstants.RIGHT);
		panel.add(label);
		
		hostField = new HistoryTextField(secure ? "sftp.host" : "ftp.host");
		hostField.setText(host);
		hostField.setColumns(20);
		if(host != null)
			hostField.setEnabled(false);
		hostField.getDocument().addDocumentListener(new FieldCompletionListener());
		hostField.addActionListener(this);
		panel.add(hostField);
		
		label = new JLabel(jEdit.getProperty("login.user"),
		SwingConstants.RIGHT);
		panel.add(label);
		
		userField = new HistoryTextField("ftp.user");
		userField.setText(user);
		userField.setColumns(20);
		userField.getDocument().addDocumentListener(new FieldCompletionListener());
		userField.addActionListener(this);
		panel.add(userField);
		
		label = new JLabel(jEdit.getProperty("login.password"),
		SwingConstants.RIGHT);
		panel.add(label);
		
		passwordField = new JPasswordField(password,20);
		passwordField.addActionListener(this);
		
		panel.add(passwordField);
		if (secure)
		{
			Box privateKeyBox = Box.createHorizontalBox();
			privateKeyField = new HistoryTextField("sftp.privateKey");
			//privateKeyField.setText("");
			privateKeyField.addActionListener(this);
			label = new JLabel(jEdit.getProperty("login.privateKey"), SwingConstants.RIGHT);
			panel.add(label);
			privateKeyBox.add(privateKeyField);
			privateKeySelect = new JButton("...");
			privateKeySelect.setMargin(new Insets(0,0,0,0));
			privateKeySelect.addActionListener(new PrivateKeySelectActionListener(this));
			privateKeyBox.add(privateKeySelect);
			panel.add(privateKeyBox);
		}
		checkKey();
		
		return panel;
	} //}}}
	
	//{{{ checkKey() method
	public void checkKey()
	{
		String host = hostField.getText();
		String user = userField.getText();
		if(host.indexOf(":") == -1)
				host = host + ":" + FtpVFS.getDefaultPort(secure);
		String key = secure ? ConnectionManager.getStoredFtpKey(host, user) : null;
		String pass = ConnectionManager.getPassword(host+"."+user);
		if (secure)
		{
			if (key != null)
				privateKeyField.setText(key);
			else
				privateKeyField.setText("");
		}
		
		if (pass != null)
			passwordField.setText(pass);

	}
	//}}}
	
	//}}}
	
	//{{{ class PrivateKeySelectActionListener
	class PrivateKeySelectActionListener implements ActionListener
	{
		private Component parent;
		public PrivateKeySelectActionListener(Component c) {
			super();
			parent = c;
		}
		
		public void actionPerformed(ActionEvent e) {
			JFileChooser chooser = new JFileChooser();
			chooser.setDialogTitle(jEdit.getProperty("login.selectprivatekey"));
			chooser.setFileHidingEnabled(false);
			int returnVal = chooser.showOpenDialog(parent);
			if(returnVal == JFileChooser.APPROVE_OPTION) {
				try{
					privateKeyField.setText(chooser.getSelectedFile().getCanonicalPath());
				} catch(java.io.IOException err) {
					// Might be nice to pop this up
				}
			}
		}
	} //}}}

	//{{{ class FieldCompletionListener
	class FieldCompletionListener implements DocumentListener
	{
		public void changedUpdate(DocumentEvent e) { checkKey(); }
		public void insertUpdate(DocumentEvent e) { checkKey(); }
		public void removeUpdate(DocumentEvent e) { checkKey(); }
	} //}}}
}