/*
   Chapter 11: The UserMaint Class
   Programmer: Brad Shedd
   Date:    May 20, 2004
   Filename:   UserMaintFrame.java
   Purpose: Provides a user interface for a stock list to test the Password class
*/

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.sql.*;
import javax.swing.border.TitledBorder;

public class UserMaintFrame extends JFrame
         implements ActionListener, ItemListener, WindowListener, STAction
{
    // Define components for label panel
    JPanel labelPanel = new JPanel();

   JLabel lblUserID = new JLabel( "User ID:", SwingConstants.LEFT );
   JLabel lblFName = new JLabel( "First Name:", SwingConstants.LEFT );
  JLabel lblLName = new JLabel( "Last Name:", SwingConstants.LEFT );
   JLabel lblPswd = new JLabel( "Password:", SwingConstants.LEFT );
   JLabel lblPswd2a = new JLabel( "Re-enter", SwingConstants.LEFT );
   JLabel lblPswd2b = new JLabel( "Password:", SwingConstants.LEFT );
   JLabel lblAutoExp = new JLabel( "Auto Expires:", SwingConstants.LEFT );
   JLabel lblUses = new JLabel( "Uses Left: ", SwingConstants.LEFT );
      JLabel lblAdmin = new JLabel();

    // TextField panel
    JPanel textPanel = new JPanel();

    JTextField jtfUserID = new JTextField(20);
    JTextField jtfFirstName = new JTextField(20);
    JTextField jtfLastName = new JTextField(20);
    JPasswordField jpfPswd1 = new JPasswordField(20);
    JPasswordField jpfPswd2 = new JPasswordField(20);
    JTextField jtfExpires = new JTextField(5);

    JButton jbtAddUser = new JButton( "Add" );
    JButton jbtUpdUser = new JButton( "Update" );
    JButton jbtDelUser = new JButton( "Delete" );
    JButton jbtCancel = new JButton("Cancel");
    JButton jbtCloseUserList = new JButton( "Close" );

    JCheckBox jcbAdmin = new JCheckBox("Is Admin");

    JPanel expiresPanel = new JPanel();   // holds expires yes/no and # of times
   JRadioButton jrbExpiresYes = new JRadioButton("Yes");
   JRadioButton jrbExpiresNo = new JRadioButton("No");

   ButtonGroup bgExpires = new ButtonGroup();

    StockTrackerDB db;
    User user = null;
    Activator caller = null;
    boolean isAdmin = false;
    boolean autoExp = true;
    int uses = 0;
    int action;

    public UserMaintFrame(User userObj, int actionType, StockTrackerDB dbc,Activator callerObj)
         throws ClassNotFoundException,SQLException
    {
        super("Stock Tracker: User Maintenance"); // call super (JFrame) constructor

      int width = 330;
      int height = 260;

        caller = callerObj;      // save reference to caller object
        db = dbc;
        user = userObj;
        action = actionType;

        JPanel workPanel = new JPanel();
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout());
       labelPanel.setLayout( new GridLayout(8,1));
        textPanel.setLayout(new GridLayout(8,1));
        expiresPanel.setLayout(new GridLayout(1,4));

       switch(action)
       {
         case ADDUSER: // add user
                  workPanel = createAddPanel();
                  buttonPanel.add(jbtAddUser);
               buttonPanel.add(jbtCancel);
                  jbtAddUser.addActionListener(this);
               jbtCancel.addActionListener(this);
               jcbAdmin.addItemListener(this);
               jrbExpiresYes.addActionListener(this);
               jrbExpiresNo.addActionListener(this);
               break;
            case UPDUSER: // update user
                  workPanel = createUpdPanel();
                  buttonPanel.add(jbtUpdUser);
               buttonPanel.add(jbtCancel);
                  jbtUpdUser.addActionListener(this);
               jbtCancel.addActionListener(this);
               jcbAdmin.addItemListener(this);
               jrbExpiresYes.addActionListener(this);
               jrbExpiresNo.addActionListener(this);
                  break;
            case DELUSER: // delete user
                  workPanel = createDelPanel();
                  buttonPanel.add(jbtDelUser);
               buttonPanel.add(jbtCancel);
                  jbtDelUser.addActionListener(this);
               jbtCancel.addActionListener(this);
                  break;
            case LISTUSERS: // list users
                  workPanel = createListPanel();
                  buttonPanel.add(jbtCloseUserList);
                  jbtCloseUserList.addActionListener(this);
                  break;
      }

        JPanel p5 = new JPanel(new BorderLayout(10,10));
        p5.add(workPanel, BorderLayout.CENTER);
        p5.add(buttonPanel, BorderLayout.SOUTH);

        JPanel p6 = new JPanel(new BorderLayout(10,10));
        p6.add(p5, BorderLayout.CENTER);

        setContentPane(p6);
        p6.setPreferredSize(new Dimension(width, height));
        p6.setMinimumSize(new Dimension(330, 200));  // width, height

      // Register listeners
        addWindowListener(this);

      // Prepare for display
      pack();
      if( width < getWidth())          // prevent setting width too small
         width = getWidth();
      if(height < getHeight())         // prevent setting height too small
         height = getHeight();
      centerOnScreen(width, height);
   }


   private JPanel createAddPanel()
   {
       labelPanel.add(lblUserID);
       labelPanel.add(lblFName);
       labelPanel.add(lblLName);
      labelPanel.add(lblPswd);
      labelPanel.add(lblPswd2a);
      labelPanel.add(lblPswd2b);
      labelPanel.add(lblAutoExp);
      labelPanel.add(jcbAdmin);

        textPanel.add(jtfUserID);
        textPanel.add(jtfFirstName);
        textPanel.add(jtfLastName);
        textPanel.add(jpfPswd1);
        textPanel.add( new JLabel("") ); // for spacing
        textPanel.add(jpfPswd2);

      jrbExpiresYes.setSelected(true);
      jtfExpires.setEditable(true);
      bgExpires.add(jrbExpiresYes);
      bgExpires.add(jrbExpiresNo);
      expiresPanel.add(jrbExpiresYes);
      expiresPanel.add(jrbExpiresNo);
      expiresPanel.add(lblUses);
      expiresPanel.add(jtfExpires);
        textPanel.add(expiresPanel);

        JPanel contentPanel = new JPanel();
      contentPanel.setBorder(new TitledBorder("Add New User"));
        contentPanel.setLayout(new BorderLayout(10,10));
      contentPanel.add(labelPanel, BorderLayout.WEST);
      contentPanel.add(textPanel, BorderLayout.EAST);

      return contentPanel;
   }

   private JPanel createUpdPanel()
   {
       labelPanel.add(lblUserID);
       labelPanel.add(lblFName);
       labelPanel.add(lblLName);
      labelPanel.add(lblPswd);
      labelPanel.add(lblPswd2a);
      labelPanel.add(lblPswd2b);
      labelPanel.add(lblAutoExp);
      labelPanel.add(lblUses);

      jtfUserID.setText(user.getUserID());
      jtfUserID.setEditable(false);
       jtfFirstName.setText(user.getFirstName());
      jtfLastName.setText(user.getLastName());
      jtfExpires.setEditable(false);

     bgExpires.add(jrbExpiresYes);
      bgExpires.add(jrbExpiresNo);

      autoExp = user.pswdAutoExpires();
       if(autoExp)
       {
         jrbExpiresYes.setSelected(true);
         jtfExpires.setText(String.valueOf(user.getPswdUses()));
      }
      else
      {
         jrbExpiresNo.setSelected(true);
      }

      isAdmin = user.isAdmin();
       if(isAdmin)
         jcbAdmin.setSelected(true);
      else
         jcbAdmin.setSelected(false);

      labelPanel.add(jcbAdmin);

        textPanel.add(jtfUserID);
        textPanel.add(jtfFirstName);
        textPanel.add(jtfLastName);
        textPanel.add(jpfPswd1);
        textPanel.add( new JLabel("") ); // for spacing
        textPanel.add(jpfPswd2);

      expiresPanel.add(jrbExpiresYes);
      expiresPanel.add(jrbExpiresNo);
      expiresPanel.add(lblUses);
      expiresPanel.add(jtfExpires);
        textPanel.add(expiresPanel);

        JPanel contentPanel = new JPanel();
      contentPanel.setBorder(new TitledBorder("Update User"));
        contentPanel.setLayout(new BorderLayout(10,10));
      contentPanel.add(labelPanel, BorderLayout.WEST);
      contentPanel.add(textPanel, BorderLayout.EAST);

      return contentPanel;
   }

   private JPanel createDelPanel()
   {
       labelPanel.add(lblUserID);
       labelPanel.add(lblFName);
       labelPanel.add(lblLName);

      jtfUserID.setText(user.getUserID());
      jtfUserID.setEditable(false);
       jtfFirstName.setText(user.getFirstName());
      jtfLastName.setText(user.getLastName());

      isAdmin = user.isAdmin();
       if(isAdmin)
         lblAdmin.setText("Administrative user");
      else
         lblAdmin.setText("Non-administrative user");

        textPanel.add(jtfUserID);
        textPanel.add(jtfFirstName);
        textPanel.add(jtfLastName);
       textPanel.add(lblAdmin);

        JPanel contentPanel = new JPanel();
      contentPanel.setBorder(new TitledBorder("Delete User"));
        contentPanel.setLayout(new BorderLayout(10,10));
      contentPanel.add(labelPanel, BorderLayout.WEST);
      contentPanel.add(textPanel, BorderLayout.EAST);

      return contentPanel;
   }

   private JPanel createListPanel()
  {
        String heading = "User ID\tFirst Name\tLast Name\tAdministrator\n"
                        +"=======\t==========\t=========\t=============\n";

      ArrayList rs;
      StringBuffer[] a2 = new StringBuffer[4];

       //Create a text area.
        JTextArea textArea = new JTextArea(5,35); // rows, cols

        Insets margins = new Insets(5,5,2,2); // top,left,bottom,right margins
        textArea.setMargin(margins);
        textArea.setLineWrap(false);
        textArea.setEditable(false);
        JScrollPane areaScrollPane = new JScrollPane(textArea);

        textArea.append(heading);
      try {
            rs = db.listUsers();
            for(int i=0; i < rs.size(); ++i)
            {
            textArea.append(rs.get(i)+"\t");
            textArea.append(rs.get(++i)+"\t");
            textArea.append(rs.get(++i)+"\t");
            textArea.append(rs.get(++i)+"\n");
         }
      }
      catch(ClassNotFoundException ex) {}
      catch(IOException ex) {}
      catch(SQLException ex)
      {
         JOptionPane.showMessageDialog(null,
                  ex.getMessage(),
                  "SQL Exception Message",
                  JOptionPane.ERROR_MESSAGE);
      }

        JPanel contentPanel = new JPanel();
      contentPanel.setBorder(new TitledBorder("List Users"));
        contentPanel.setLayout(new BorderLayout());
      contentPanel.add(areaScrollPane, BorderLayout.CENTER);

      return contentPanel;
    }

   public void centerOnScreen(int width, int height)
   {
     int top, left, x, y;

     // Get the screen dimension
     Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

     // Determine the location for the top left corner of the frame
     x = (screenSize.width - width)/2;
     y = (screenSize.height - height)/2;
     left = (x < 0) ? 0 : x;
     top = (y < 0) ? 0 : y;

     this.setBounds(left, top, width, height);
   }

    public void itemStateChanged( ItemEvent e )
   {
      if(e.getStateChange() == ItemEvent.SELECTED)
         isAdmin = true;
      else
         isAdmin = false;
   }

    public void actionPerformed(ActionEvent e)
    {
      if(e.getSource() == jbtCancel)         // clicked Cancel button
        {
         closeUserMaint();
      }
      else if(e.getSource() == jbtAddUser)   // clicked Add button
        {
         try
         {
            if(addUser())
               closeUserMaint();
         }
         catch(PasswordException ex)
         {
            JOptionPane.showMessageDialog(null,
                  ex.getMessage(),
                    "Password Exception Message",
                    JOptionPane.ERROR_MESSAGE);
         }
      }
      else if(e.getSource() == jbtUpdUser)   // clicked Update button
        {
         try
         {
            updUser();
            closeUserMaint();
         }
         catch(PasswordException ex)
         {
            JOptionPane.showMessageDialog(null,
                  ex.getMessage(),
                    "Password Exception Message",
                    JOptionPane.ERROR_MESSAGE);
         }
      }
      else if(e.getSource() == jbtDelUser)      // clicked Delete button
        {
         delUser();
         closeUserMaint();
      }
      else if(e.getSource() == jbtCloseUserList)   // clicked Close button on list
        {
         closeUserMaint();
      }
         else if(e.getSource() == jrbExpiresYes)      // clicked Yes for Expires
        {
         if(action == ADDUSER) // doing add user
            jtfExpires.setEditable(true);

         if(action == UPDUSER) // doing update user
               jtfExpires.setText(String.valueOf(user.getPswdUses()));

         autoExp = true;
      }
         else if(e.getSource() == jrbExpiresNo)
        {
         jtfExpires.setEditable(false);
         jtfExpires.setText("");
        autoExp = false;
      }
         else
        {
            JOptionPane.showMessageDialog(this, "Please choose a valid action.");
      }
    }

    private void closeUserMaint()
    {
    this.setVisible(false);
     dispose();
     caller.activate(); // call activate method of caller object
   }

    public boolean addUser() throws PasswordException
    {
      boolean success = false;
      String pswd1, pswd2;

      pswd1 = new String(jpfPswd1.getPassword());
      pswd2 = new String(jpfPswd2.getPassword());

         if(jtfUserID.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a user id.",
                    "Missing User ID.",
                    JOptionPane.ERROR_MESSAGE);

         jtfUserID.requestFocus();
         }
         else
         if(jtfFirstName.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a first name.",
                    "Missing First Name.",
                    JOptionPane.ERROR_MESSAGE);
         jtfFirstName.requestFocus();
         }
         else
         if(jtfLastName.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a last name.",
                    "Missing Last Name.",
                    JOptionPane.ERROR_MESSAGE);
         jtfLastName.requestFocus();
         }
         else
         if(pswd1.equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a password.",
                    "Missing Password.",
                    JOptionPane.ERROR_MESSAGE);
         jpfPswd1.requestFocus();
         }
         else
         if(pswd2.equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please re-enter the password.",
                    "Missing Password Re-entry.",
                    JOptionPane.ERROR_MESSAGE);
         jpfPswd2.requestFocus();
         }
         else
         if(!pswd1.equals(pswd2))
         {
            JOptionPane.showMessageDialog(null,
                  "Password re-entry does not match password.",
                    "Invalid Password Re-entry.",
                    JOptionPane.ERROR_MESSAGE);
         jpfPswd2.requestFocus();
         }
         else
      if(autoExp && jtfExpires.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "An automatically expiring password requires valid number of uses.",
                    "Invalid Number of Uses.",
                    JOptionPane.ERROR_MESSAGE);
         jtfExpires.requestFocus();
         }
         else
         try {
         success = true;
         if(autoExp)
               uses = Integer.parseInt(jtfExpires.getText());
         else
             uses = 0;

          user = new User(jtfUserID.getText(),jtfFirstName.getText(),jtfLastName.getText(),
                     pswd1, autoExp, uses, isAdmin);
          user.expirePassword(); // cause new user to have to change password

              if(!db.addUser(user))
              {
            jtfUserID.setText( "" );
            jtfFirstName.setText( "" );
            jtfLastName.setText( "" );
            jpfPswd1.setText( "" );
            jpfPswd2.setText( "" );
            jtfExpires.setText( "" );
            JOptionPane.showMessageDialog(null,
                  "User not added.",
                    "Invalid Add.",
                    JOptionPane.ERROR_MESSAGE);
              }
              else
            JOptionPane.showMessageDialog(null,"User "+user.getUserID()
                                         +", "+user.getFirstName()
                                         +" "+user.getLastName()
                                         +", added.",
                                         "New User Added",
                                         JOptionPane.INFORMATION_MESSAGE);
      }
      catch(ClassNotFoundException ex) {}
      catch(IOException ex) {}
         catch(SQLException sqlex) {}

         return success;
   }

    public void updUser() throws PasswordException
    {
      boolean okForUpdate = true;
      String pswd1, pswd2;

      pswd1 = new String(jpfPswd1.getPassword());
      pswd2 = new String(jpfPswd2.getPassword());

         if(jtfUserID.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a user id.",
                    "Missing User ID.",
                    JOptionPane.ERROR_MESSAGE);
         okForUpdate = false;
         }
         else
         if(jtfFirstName.getText().equals(""))
         {
            JOptionPane.showMessageDialog(null,
                  "Please enter a first name.",
                    "Missing First Name.",
                    JOptionPane.ERROR_MESSAGE);
         okForUpdate = false;
         }
         else
         if(jtfLastName.getText().equals(""))
         {
         JOptionPane.showMessageDialog(null,
                  "Please enter a last name.",
                    "Missing Last Name.",
                    JOptionPane.ERROR_MESSAGE);
         okForUpdate = false;
         }

      if(okForUpdate)
            if(!pswd1.equals(""))      // entered a new password value in password1
            {
               if(pswd2.equals("")) // did not enter a new password value in password2
               {
               JOptionPane.showMessageDialog(null,
                  "Please re-enter the password.",
                    "Missing Password Re-entry.",
                    JOptionPane.ERROR_MESSAGE);
               okForUpdate = false;
               }
               else
               if(!pswd1.equals(pswd2))   // new password1 does not match password2
               {
               JOptionPane.showMessageDialog(null,
                  "Password re-entry does not match password.",
                    "Invalid Password Re-entry.",
                    JOptionPane.ERROR_MESSAGE);
               okForUpdate = false;
               }
               else
               user.adminChangePassword(pswd1);
        }

      if(okForUpdate)
            try {
            user.setFirstName(jtfFirstName.getText());
            user.setLastName(jtfLastName.getText());
            user.setAdmin(isAdmin);
            user.setAutoExpires(autoExp);

               if(db.updUser(user))
               JOptionPane.showMessageDialog(this,"User "+user.getUserID()
                                            +", "+user.getFirstName()
                                            +" "+user.getLastName()
                                            +", updated.",
                                            "User Updated",
                                            JOptionPane.INFORMATION_MESSAGE);
         }
         catch(ClassNotFoundException ex) {}
        catch(IOException ex) {}
            catch(SQLException ex)
            {
            JOptionPane.showMessageDialog(null,
                  ex.getMessage(),
                  "SQL Exception Message",
                  JOptionPane.ERROR_MESSAGE);
         }
   }

    public void delUser()
    {
      try {
         db.delUser(user);
         JOptionPane.showMessageDialog(this,"User "+user.getUserID()
                                      +", "+user.getFirstName()
                                      +" "+user.getLastName()
                                      +", deleted.",
                                      "User Deleted",
                                      JOptionPane.INFORMATION_MESSAGE);

      }
      catch(ClassNotFoundException ex) {}
      catch(IOException ex) {}
      catch(SQLException ex)
      {
         JOptionPane.showMessageDialog(null,
                  ex.getMessage(),
                  "SQL Exception Message",
                  JOptionPane.ERROR_MESSAGE);
      }
   }


    // Handler for window opened event
    public void windowOpened(WindowEvent event)
    {
       switch(action)
       {
         case ADDUSER: // adding a new user
               jtfUserID.requestFocus();
                  break;
            case UPDUSER: // updating an existing user
               jtfFirstName.requestFocus();
                  break;
            case DELUSER: // deleting an existing user; no focus set on a field
                  break;
            case LISTUSERS: // listing all users
               jbtCloseUserList.requestFocus();
                  // Enable Enter key for JButton
               InputMap map;
               map = jbtCloseUserList.getInputMap();
               if (map != null){
                  map.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0,false), "pressed");
                  map.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0,true), "released");
               }
                  break;
      }
    }
    // Handler for window closing event
    public void windowClosing(WindowEvent event)
    {
     closeUserMaint();
    }
    // Handler for window closed event
    public void windowClosed(WindowEvent event)
    {
    }
    // Handler for window iconified event
    public void windowIconified(WindowEvent event)
    {
   }
    // Handler for window deiconified event
    public void windowDeiconified(WindowEvent event)
    {
    }
    // Handler for window activated event
    public void windowActivated(WindowEvent event)
    {
    }
    // Handler for window deactivated event
    public void windowDeactivated(WindowEvent event)
    {
    }
}

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