/*
 * AuthDialog.java
 *
 *
 *
 ====================================================
 Professional Data Security (PDS)

 http://crypto.brettlee.com
 ====================================================

 Copyright (c) 2009-2011, Brett Lee
 All rights reserved.

 Portions Copyright (C) 1995-2008, Sun Microsystems, Inc.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:

   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
   * Neither the name of the ORGANIZATION nor the names of its contributors
     may be used to endorse or promote products derived from this software
     without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.

 =============================================================================
*/


package com.brettlee.crypto;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.border.TitledBorder;

/**
 * AuthDialog - Get the appropriate authorization 
 *		(KeyStore pass, key pass, or both)
 * 
 */
///////////////////////////////////////////////////////////////////////

class AuthDialog extends JDialog {

	/**
	 * 
	 */
	CryptoFile cryptoFile;
	final JPasswordField ksPassField = new JPasswordField(15);
	final JPasswordField keyPassField = new JPasswordField(15);
	final JRadioButton yesButton  = new JRadioButton("Yes" , true);

	public AuthDialog( JFrame frame, boolean modal, int whatsRequired, CryptoFile cryptoFileAuth ) {

		super(frame, modal);
		cryptoFile = cryptoFileAuth;
		initComponents(whatsRequired);
		pack();
		setLocationRelativeTo(frame);
		setTitle("Professional Data Security (PDS) - Authorization");
		setVisible(true);
	}


	//
	// Popup a dialog prompting for the desired authentication
	// whatIsRequired (2 = KeyStore, 3 = Key, 6 = KeyStore+Key)
	//
	void initComponents ( final int whatsRequired ) {

		JRadioButton noButton = new JRadioButton("No" , false);
		ButtonGroup sharePassButton = new ButtonGroup();


		ksPassField.addActionListener( new ActionListener() {

			public void actionPerformed(ActionEvent evt) {
				process( whatsRequired );
			}
		} );


		keyPassField.addActionListener( new ActionListener() {

			public void actionPerformed(ActionEvent evt) {
				process( whatsRequired );
			}
		} );



		/////////////////////////////////////////////////////////////
		// Build the Dialog

		JPanel contentPane = new JPanel();

		GroupLayout layout = new GroupLayout(contentPane);
		contentPane.setLayout(layout);
		layout.setAutoCreateGaps(true);
		layout.setAutoCreateContainerGaps(true);

		add(contentPane);

		FlowLayout flowLayoutLeft = new FlowLayout();
		flowLayoutLeft.setAlignment(FlowLayout.LEFT);

		JPanel p1 = new JPanel();
		JPanel p2 = new JPanel( flowLayoutLeft );
		JPanel p3 = new JPanel( flowLayoutLeft );
		JPanel p4 = new JPanel();

		layout.setHorizontalGroup(
			layout.createSequentialGroup()
			.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
				.addComponent(p1)
				.addComponent(p2)
				.addComponent(p3)
				.addComponent(p4)
			)
		);
		layout.setVerticalGroup(
			layout.createSequentialGroup()
			.addComponent(p1)
			.addComponent(p2)
			.addComponent(p3)
			.addComponent(p4)
		);



		/////////////////////////////////////////////////////////////
		// p1 - Title
		JLabel jlabel = new JLabel("Authentication Required");
		p1.add(jlabel);



		if ( (whatsRequired % 2) == 0 ) {

			// p2 - KeyStore Passphrase
			JPanel p2SubPanel = new JPanel(new FlowLayout());
			p2.add(p2SubPanel);
			p2.setBorder(new TitledBorder("KeyStore"));

			JLabel p2Label = new JLabel("Enter the KeyStore Passphrase: ");
			p2SubPanel.add(p2Label);
			ksPassField.addActionListener( new ActionListener() {
				public void actionPerformed(ActionEvent evt) {
					if ( ksPassField.getPassword().length > 0 ) {
						process( whatsRequired);
					}
				}
			} );
			p2SubPanel.add(ksPassField);
		}


		if ( (whatsRequired % 3) == 0 ) {

			// p3 - Key Passphrase
			p3.setBorder(new TitledBorder("Key"));
			JPanel p3SubPanel = new JPanel(new GridLayout(0,1));
			p3.add(p3SubPanel);
			keyPassField.addActionListener( new ActionListener() {
				public void actionPerformed(ActionEvent evt) {
					if ( keyPassField.getPassword().length > 0 ) {
						process( whatsRequired);
					}
				}
			} );
			keyPassField.setEnabled(true);



			if ( (whatsRequired % 2) == 0 ) {

				JPanel p3SubPanela = new JPanel( flowLayoutLeft );
				p3SubPanel.add(p3SubPanela);

				JLabel p3Label = new JLabel("KeyStore / Key share the same passphrase: ");
				p3SubPanela.add( p3Label, BorderLayout.WEST );
				p3SubPanela.add( yesButton, BorderLayout.WEST);
				p3SubPanela.add( noButton, BorderLayout.WEST );

				sharePassButton.add(yesButton);
				sharePassButton.add(noButton);

				noButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent evt) {
						keyPassField.setEnabled(true);
					}
				});
				yesButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent evt) {
						keyPassField.setEnabled(false);
					}
				});

				keyPassField.setEnabled(false);
			}

			JPanel p3SubPanelb = new JPanel( flowLayoutLeft );
			p3SubPanel.add(p3SubPanelb);

			JLabel p3Label2 = new JLabel("Enter the Key Passphrase: ");
			p3SubPanelb.add(p3Label2, BorderLayout.WEST);
			keyPassField.addActionListener( new ActionListener() {
				public void actionPerformed(ActionEvent evt) {
					if ( keyPassField.getPassword().length > 0 ) {
						process( whatsRequired);
					}
				}
			} );
			p3SubPanelb.add(keyPassField, BorderLayout.WEST);
		}



		// p4 - Accept & Cancel Buttons
		JButton jButtonAccept = new JButton("Accept");
		jButtonAccept.setMnemonic(KeyEvent.VK_A);
		Gui.enterPressesWhenFocused(jButtonAccept);
		jButtonAccept.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent evt) {
				process( whatsRequired);
			} 
		});
		p4.add(jButtonAccept);

		JButton jButtonCancel = new JButton("Cancel");
		jButtonCancel.setMnemonic(KeyEvent.VK_C);
		Gui.enterPressesWhenFocused(jButtonCancel);
		jButtonCancel.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
//				System.out.println("Canceling...");

				// Clear KeyStore Pass
				char[] nullPass = null;
				cryptoFile.setKsPass(nullPass);

				// Set marker to indicate Cancel
				StateObject.setFileChooserCancel(true);	

				setVisible(false);
				dispose();
			} 
		});
		p4.add(jButtonCancel);

	}


	void process (int whatsRequired) {

		if ( (whatsRequired % 2) == 0 ) {

			// Get KeyStore Passphrase
			cryptoFile.setKsPass(ksPassField.getPassword());

//			System.out.print("**** KeyStore Passphrase: ");
//			for ( int i = 0; i < cryptoFile.getKsPass().length; i++ ) {
//				System.out.print( cryptoFile.getKsPass()[i] );
//			}
//			System.out.println();
		}


		if ( (whatsRequired % 3) == 0 ) {

			// Get Key Passphrase
			cryptoFile.setKeyPass(keyPassField.getPassword());

			if (( yesButton.isSelected() ) && (whatsRequired != 3)) {
				// Set Key Passphrase to KeySTORE Passphrase
//				System.out.println("*** Setting KeyPass to KsPass ***");
				cryptoFile.setKeyPass(cryptoFile.getKsPass());
			}
//			System.out.print("**** Key Passphrase: ");
//			for ( int i=0; i < cryptoFile.getKeyPass().length; i++ ) {
//				System.out.print( cryptoFile.getKeyPass()[i] );
//			}
//			System.out.println();
		}

		boolean pass = true;
		if ( (whatsRequired % 2) == 0 ) {
			if (ksPassField.getPassword().length == 0) {
				pass = false;
				JOptionPane.showMessageDialog(
					new JFrame(),
					"KeyStore passphrase cannot be empty.",
					"KeyStore Passphrase",
					JOptionPane.WARNING_MESSAGE);
			}

		} else if ( (whatsRequired % 3) == 0 ) {
			if (keyPassField.getPassword().length == 0) {
				pass = false;
				JOptionPane.showMessageDialog(
					new JFrame(),
					"Key passphrase cannot be empty.",
					"Key Passphrase",
					JOptionPane.WARNING_MESSAGE);
			}
		}

		if ( pass ) {
			setVisible(false);
			dispose();
		}
	}
}