/*
   Chapter 8:     Hands On BillPayer
   Programmer:   Brad Shedd
   Date:      September 1, 2006
   Program Name:  BillPayer.java
*/

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

public class BillPayer extends JFrame implements ActionListener
{
   //Declare output stream
   DataOutputStream output;

   //Construct a panel for each row
   JPanel firstRow = new JPanel();
   JPanel secondRow = new JPanel();
   JPanel thirdRow = new JPanel();
   JPanel fourthRow = new JPanel();
   JPanel fifthRow = new JPanel();
   JPanel sixthRow = new JPanel();
   JPanel seventhRow = new JPanel();
   JPanel eighthRow = new JPanel();

   //Construct a panel for the fields and buttons
   JPanel fieldPanel = new JPanel();
   JPanel buttonPanel = new JPanel();

   //Construct Labels and text boxes
   JLabel acctNumLabel = new JLabel("Account Number:                   ");
      JTextField acctNum = new JTextField(15);
   JLabel pmtLabel = new JLabel("Payment Amount:");
      JTextField pmt = new JTextField(10);
   JLabel firstNameLabel = new JLabel("First Name:                   ");
      JTextField firstName = new JTextField(10);
   JLabel lastNameLabel = new JLabel("Last Name:                    ");
      JTextField lastName = new JTextField(20);
   JLabel addressLabel = new JLabel("Address:");
      JTextField address = new JTextField(35);
   JLabel cityLabel = new JLabel("City:                  ");
      JTextField city = new JTextField(10);
   JLabel stateLabel = new JLabel("State:");
      JTextField state = new JTextField(2);
   JLabel zipLabel = new JLabel("Zip:");
      JTextField zip = new JTextField(9);

   //Construct button
   JButton submitButton = new JButton("submit");

   public static void main(String[] args)
   {
      //set the look and feel of the interface
      try
      {
         UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookandFeel");

      }
      catch(Exception e)
      {
         JOptionPane.showMessageDialog(null,
         "The UIManager could not set the Look and Feel for this application.","Error",
         JOptionPane.INFORMATION_MESSAGE);
      }

      BillPayer f = new BillPayer();
      f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
      f.setSize(450,300);
      f.setTitle("Shedd Power and Light Customer Payments");
      f.setResizable(false);
      f.setLocation(200,200);
      f.setVisible(true);
   }

   public BillPayer()
   {
      Container c = getContentPane();
      c.setLayout((new BorderLayout()));
      fieldPanel.setLayout(new GridLayout(8,1));
      FlowLayout rowSetup = new FlowLayout(FlowLayout.LEFT,5,3);
         firstRow.setLayout(rowSetup);
         secondRow.setLayout(rowSetup);
         thirdRow.setLayout(rowSetup);
         fourthRow.setLayout(rowSetup);
         fifthRow.setLayout(rowSetup);
         sixthRow.setLayout(rowSetup);
         seventhRow.setLayout(rowSetup);
         eighthRow.setLayout(rowSetup);
      buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));

   //Add fields to rows
   firstRow.add(acctNumLabel);
   firstRow.add(pmtLabel);

   secondRow.add(acctNum);
   secondRow.add(pmt);

   thirdRow.add(firstNameLabel);
   thirdRow.add(lastNameLabel);
  thirdRow.add(lastNameLabel);

   fourthRow.add(firstName);
   fourthRow.add(lastName);

   fifthRow.add(addressLabel);

   sixthRow.add(address);

   seventhRow.add(cityLabel);
   seventhRow.add(stateLabel);
   seventhRow.add(zipLabel);

   eighthRow.add(city);
   eighthRow.add(state);
   eighthRow.add(zip);

   //Add rows to panel
   fieldPanel.add(firstRow);
   fieldPanel.add(secondRow);
   fieldPanel.add(thirdRow);
   fieldPanel.add(fourthRow);
   fieldPanel.add(fifthRow);
   fieldPanel.add(sixthRow);
   fieldPanel.add(seventhRow);
   fieldPanel.add(eighthRow);

   //Add button to panel
   buttonPanel.add(submitButton);

   //Add panels to frame
   c.add(fieldPanel, BorderLayout.CENTER);
   c.add(buttonPanel, BorderLayout.SOUTH);

   //Add functionality to buttons
   submitButton.addActionListener(this);

   //Get the current date adn open the file
   Date today = new Date();
   SimpleDateFormat myFormat = new SimpleDateFormat("MMddyyyy");
   String filename = "payments" + myFormat.format(today);

   try
   {
      output = new DataOutputStream(new FileOutputStream(filename));
   }
   catch(IOException io)
   {
      JOptionPane.showMessageDialog(null,
      "The program could not create a storage location.  Please check the disk drive and then run the program again.",
      "Error",JOptionPane.INFORMATION_MESSAGE);

      System.exit(1);
   }

   addWindowListener(
      new WindowAdapter()
      {
         public void windowlosing(WindowEvent e)
         {
            int answer = JOptionPane.showConfirmDialog(null,
            "Are you sure you want to exit and submit the file?", "File Submission",
            JOptionPane.YES_NO_OPTION);
            if (answer == JOptionPane.YES_OPTION)
               System.exit(0);
         }
      }
   );

}

   public void actionPerformed(ActionEvent e)
   {
      String arg = e.getActionCommand();

      if (checkFields())
      {
        try
         {
            output.writeUTF(acctNum.getText());
            output.writeUTF(pmt.getText());
            output.writeUTF(firstName.getText());
            output.writeUTF(lastName.getText());
            output.writeUTF(address.getText());
            output.writeUTF(city.getText());
            output.writeUTF(state.getText());
            output.writeUTF(zip.getText());

            JOptionPane.showMessageDialog(null,"The payment information has been saved.",
            "Submission Successful",JOptionPane.INFORMATION_MESSAGE);
         }
         catch(IOException c)
         {
            System.exit(1);
         }
         clearFields();
      }
   }

   public boolean checkFields()
   {
      if ((acctNum.getText().compareTo("")<1)    ||
          (pmt.getText().compareTo("")<1)        ||
          (firstName.getText().compareTo("")<1)  ||
          (lastName.getText().compareTo("")<1)   ||
          (address.getText().compareTo("")<1)    ||
          (city.getText().compareTo("")<1)       ||
          (state.getText().compareTo("")<1)      ||
          (zip.getText().compareTo("")<1))
      {
         JOptionPane.showMessageDialog(null,"You must complete all fields.",
         "Data Entry Error",JOptionPane.WARNING_MESSAGE);
         return false;
      }
      else
      {
         return true;
      }
   }

   public void clearFields()
   {
      //clear fields and reset the focus
      acctNum.setText("");
      pmt.setText("");
      firstName.setText("");
      lastName.setText("");
      address.setText("");
      city.setText("");
      state.setText("");
      zip.setText("");
      acctNum.requestFocus();
   }
}

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