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


public class PersonGUI implements ActionListener
{
	private ArrayList<Person> peopleDatabase;
	
	// Textfields for basic information
	private JTextField fName;
	private JTextField lName;
	private JTextField address;
	private JTextField city;
	private JTextField zip;

	private JComboBox state;
	
	private JTextArea message;
	
	private JButton enter;
	private JButton count;
	
	private JMenuItem exitItem;
	private JMenuItem aboutItem;
	
	public PersonGUI()
	{
		peopleDatabase = new ArrayList<Person>();
		
		//initialize frame
		JFrame personFrame = new JFrame("Person Database Entry");
		personFrame.setSize(600,200);
		personFrame.setLocation(100,100);
		personFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		personFrame.setResizable(false);
		
		JPanel top = new JPanel();
		top.add(new JLabel("First Name:  "));
		fName = new JTextField(10);
		top.add(fName);
		top.add(new JLabel("Last Name:  "));
		lName = new JTextField(15);
		top.add(lName);
		personFrame.add(top,BorderLayout.NORTH);

		JPanel mid = new JPanel();
		mid.setLayout(new GridLayout(0,1));
		JPanel addrPanel = new JPanel();
		addrPanel.add(new JLabel("Address: "));
		address = new JTextField(40);
		addrPanel.add(address);
		mid.add(addrPanel);
		JPanel cszPanel = new JPanel();
		cszPanel.add(new JLabel("City: "));
		city = new JTextField(15);
		cszPanel.add(city);
		cszPanel.add(new JLabel("State: "));
		state = new JComboBox();
		state.addItem("NY");
		state.addItem("OH");
		state.addItem("PA");
		state.addItem("RI");
		state.addItem("MA");
		state.setSelectedItem(null);
		cszPanel.add(state);
		cszPanel.add(new JLabel("Zip:  "));
		zip = new JTextField(5);
		cszPanel.add(zip);
		mid.add(cszPanel);
		personFrame.add(mid,BorderLayout.CENTER);
		
		JPanel side = new JPanel();
		side.setLayout(new GridLayout(0,1));
		JPanel b1 = new JPanel();
		enter = new JButton("Enter");
		b1.add(enter);
		enter.addActionListener(this);
		side.add(b1);
		JPanel b2 = new JPanel();
		count = new JButton("Count");
		b2.add(count);
		count.addActionListener(this);
		side.add(b1);
		side.add(b2);
		personFrame.add(side,BorderLayout.WEST);
		
		JPanel bottom = new JPanel();
		message = new JTextArea(2,30);
		message.setLineWrap(true);
		message.setWrapStyleWord(true);
		message.setEditable(false);
		JScrollPane jsp = new JScrollPane(message);
		bottom.add(jsp);
		personFrame.add(bottom,BorderLayout.SOUTH);
		
		JMenuBar jmb = new JMenuBar();
		personFrame.setJMenuBar(jmb);
		JMenu mHW = new JMenu("Homework");
		mHW.setMnemonic('H');
		jmb.add(mHW);
		aboutItem = new JMenuItem("About");
		aboutItem.setMnemonic('A');
		aboutItem.addActionListener(this);
		mHW.add(aboutItem);
		exitItem = new JMenuItem("Exit");
		exitItem.setMnemonic('x');
		exitItem.addActionListener(this);
		mHW.add(exitItem);

		//display frame
		personFrame.pack();
		personFrame.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		if (ae.getSource() == exitItem)
		{
			System.exit(0);
		}
		else if (ae.getSource() == aboutItem)
		{
			message.setText("Your Name, 221, Homework 6:  allow entry of "+
				"information on a person and save in a list and find out how many you have entered.");
		}
		else if (ae.getSource() == count)
		{
			message.setText("The number of people created and saved is: "+peopleDatabase.size());	
			resetFields();
		}
		else if (ae.getSource() == enter)
		{
			try
			{				
				Person pers = new Person(fName.getText(),lName.getText(),address.getText(),
					city.getText(),state.getSelectedItem().toString(),zip.getText());
				peopleDatabase.add(pers);
				message.setText(fName.getText()+" "+lName.getText()+" created and saved");
				resetFields();
			}
			catch (BadValueException bve)
			{
				message.setText("Problem saving this person, please correct: "+
					bve.getMessage());	
				fName.requestFocus();
			}
			catch (NullPointerException npe)
			{
				message.setText("Problem saving this person, please enter the requested information.");
				fName.requestFocus();	
			}
		} //enter
	} //action performed
	
	public void resetFields()
	{
		fName.setText("");
		fName.requestFocus();
		lName.setText("");
		address.setText("");
		city.setText("");
		state.setSelectedItem(null);
		zip.setText("");
	}
	
	public static void main(String[] args)
	{
		PersonGUI gui = new PersonGUI();	
	}	
} //end class