/*
 * Copyright (C) The Apache Software Foundation. All rights reserved.
 *
 * This software is published under the terms of the Apache Software License
 * version 1.1, a copy of which has been included with this distribution in
 * the LICENSE file.
 */
package server.ftp.gui;

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.Iterator;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

import gui.GuiUtils;
import server.ftp.FtpConfig;
import server.ftp.FtpUser;
import server.ftp.usermanager.User;

/**
 * Ftp server user admin panel.
 * 
 * @author <a href="mailto:rana_b@yahoo.com">Rana Bhattacharyya</a>
 */
public 
class FtpUserPanel extends PluginPanel 
                   implements ActionListener {                    
    
    private final static Random PASS_GEN = new Random(System.currentTimeMillis()); 
    
    private final static Object[] BYTE_RATES = {
        "No limit",
        new Integer(1200),
        new Integer(2400),
        new Integer(4800),
        new Integer(9600),
        new Integer(14400),
        new Integer(28800),    
        new Integer(57600),
        new Integer(115200)    
    };                   
    
    private final static Object[] IDLE_SECONDS = {
        "No limit",
        new Integer(60),
        new Integer(300),
        new Integer(900),
        new Integer(1800),
        new Integer(3600)    
    };
    
    private FtpConfig mConfig;                   
                       
    private JComboBox mjUserLst;
    private JTextField mjNameTxt;
    
    private JPasswordField mjPasswordTxt;
    private JPasswordField mjRetypePasswordTxt;
    private JCheckBox mjPasswordChkBox;
    
    private JTextField mjDirectoryTxt;
    private JCheckBox mjEnabledChkBox;
    private JCheckBox mjWriteChkBox;
    private JComboBox mjIdleLst;
    private JComboBox mjUploadLst;
    private JComboBox mjDownloadLst;
    
    /** 
     * Creates new panel. 
     */
    public FtpUserPanel(FtpTree tree) {
        super(tree);
        initComponents();
    }

    /** 
     * This method is called from within the constructor to
     * initialize the form.
     */
    private void initComponents() {
        GridBagConstraints gc;
        setLayout(new GridBagLayout());
        int yindex = -1;        

        // user list
        mjUserLst = new JComboBox();
        mjUserLst.addActionListener(this);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 3;
        gc.insets = new Insets(3, 0, 0, 3);
        add(mjUserLst, gc);
        
        // user name
        JLabel jNameLab = new JLabel("Name");
        jNameLab.setHorizontalAlignment(JLabel.RIGHT);
        jNameLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jNameLab, gc);
         
        mjNameTxt = new JTextField();
        mjNameTxt.setColumns(12);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjNameTxt, gc);
        
        // password
        JLabel jPasswordLab = new JLabel("Password");
        jPasswordLab.setHorizontalAlignment(JLabel.RIGHT);
        jPasswordLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jPasswordLab, gc);        
        
        mjPasswordTxt = new JPasswordField();
        mjPasswordTxt.setColumns(12);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjPasswordTxt, gc);

        JButton jGeneratePassBtn = new JButton("Generate");
        jGeneratePassBtn.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent evt) {
               generatePassword();
           }
        });
        gc = new GridBagConstraints();
        gc.gridx = 2;
        gc.gridy = yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(jGeneratePassBtn, gc);
        
        // retype password
        JLabel jRetypePasswordLab = new JLabel("Retype Password");
        jRetypePasswordLab.setHorizontalAlignment(JLabel.RIGHT);
        jRetypePasswordLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jRetypePasswordLab, gc);
        
        mjRetypePasswordTxt = new JPasswordField();
        mjRetypePasswordTxt.setColumns(12);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjRetypePasswordTxt, gc);
        
        // set password
        JLabel jSetPasswordLab = new JLabel("Set Password");
        jSetPasswordLab.setHorizontalAlignment(JLabel.RIGHT);
        jSetPasswordLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jSetPasswordLab, gc);
        
        mjPasswordChkBox = new JCheckBox();
        mjPasswordChkBox.setHorizontalTextPosition(SwingConstants.LEFT);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjPasswordChkBox, gc);

        // root directory
        JLabel jDirectoryLab = new JLabel("Root Directory");
        jDirectoryLab.setHorizontalAlignment(JLabel.RIGHT);
        jDirectoryLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.anchor = GridBagConstraints.EAST;
        gc.insets = new Insets(3, 0, 0, 3);
        add(jDirectoryLab, gc);
        
        mjDirectoryTxt = new JTextField();
        mjDirectoryTxt.setColumns(12);      
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 1;
        gc.anchor = GridBagConstraints.WEST;
        gc.insets = new Insets(3, 0, 0, 3);
        add(mjDirectoryTxt, gc); 
        
        JButton jDirectoryBtn = new JButton("Browse");
        jDirectoryBtn.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent evt) {
               browse(evt);
           }
        });
        gc = new GridBagConstraints();
        gc.gridx = 2;
        gc.gridy = yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(jDirectoryBtn, gc);
        
        // enable/disable
        JLabel jEnabledLab = new JLabel("Enabled");
        jEnabledLab.setHorizontalAlignment(JLabel.RIGHT);
        jEnabledLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jEnabledLab, gc);

        mjEnabledChkBox = new JCheckBox();
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjEnabledChkBox, gc);
        
        // write permission
        JLabel jWritePermLab = new JLabel("Write Permission");
        jWritePermLab.setHorizontalAlignment(JLabel.RIGHT);
        jWritePermLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jWritePermLab, gc);
        
        mjWriteChkBox = new JCheckBox();
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjWriteChkBox, gc);
              
        // idle time
        JLabel jIdleLab = new JLabel("Max. Idle Time (seconds)");
        jIdleLab.setHorizontalAlignment(JLabel.RIGHT);
        jIdleLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jIdleLab, gc);
        
        mjIdleLst = new JComboBox(IDLE_SECONDS);
        mjIdleLst.setEditable(true);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;
        add(mjIdleLst, gc);
        
        // user upload limit
        JLabel jUploadLab = new JLabel("Max. Upload (bytes/sec)");
        jUploadLab.setHorizontalAlignment(JLabel.RIGHT);
        jUploadLab.setForeground(Color.black);
        gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = ++yindex;
        gc.gridwidth = 1;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.EAST;
        add(jUploadLab, gc);
        
        mjUploadLst = new JComboBox(BYTE_RATES);
        mjUploadLst.setEditable(true);
        gc = new GridBagConstraints();
        gc.gridx = 1;
        gc.gridy = yindex;
        gc.gridwidth = 2;
        gc.insets = new Insets(3, 0, 0, 3);
        gc.anchor = GridBagConstraints.WEST;