import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.CardLayout;
import java.awt.FlowLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.Insets;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class AccountInteractionFrame extends Frame
{
	private BankMachine _bankMachine;
	
	private BankAccount _bankAccount;
	
	private Label	_prompt = new Label( "Please enter the requested information." );
	
	private Label	_balance = new Label( "" ),
					_interestRate = new Label( "" );
	


	private TextField 	_name = new TextField(""),
						_password = new TextField(""),
						_credit = new TextField( "0.0" ),
						_debit = new TextField( "0.0" );
					

	private Panel 	_panelHolder = new Panel(), // the panel used to hold either of the next two panels
					_loginPanel = new Panel(),
					_interactionPanel = new Panel();


	public AccountInteractionFrame( BankMachine bankMachine ) { 
		_bankMachine = bankMachine;
	
		setTitle( "Account Interaction" );
		
		setLayout( new GridBagLayout() );
		GridBagConstraints gbc;
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 0;
		gbc.weighty = 1.0;
		gbc.weightx = 1.0;
		gbc.fill = GridBagConstraints.BOTH;
		gbc.insets = new Insets( 4,4,4,4 );
		add( _prompt, gbc );		

		_panelHolder.setLayout( new CardLayout() );
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 1;
		gbc.weightx = 1.0;
		gbc.insets = new Insets( 4,4,4,4 );
		gbc.fill = GridBagConstraints.BOTH;
		add( _panelHolder, gbc );

		setUpLoginPanel();
		setUpInteractionPanel();
		setPanel( _loginPanel );

		pack();
	}
	private void setUpLoginPanel() {
		_password.setEchoChar( '*' );
		
		_loginPanel.setLayout( new GridBagLayout() );
		GridBagConstraints gbc;
		
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 1;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_loginPanel.add( new Label( "Name: " ), gbc );

		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 1;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_loginPanel.add( _name, gbc );
		
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 2;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_loginPanel.add( new Label( "Password: " ), gbc );	
		
		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 2;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_loginPanel.add( _password, gbc );
		
		
		Panel buttonHolder = new Panel();		
		buttonHolder.setLayout( new FlowLayout( FlowLayout.CENTER ) );
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 4;
		gbc.gridwidth = 2;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_loginPanel.add( buttonHolder, gbc );
		
		Button a = new Button( "Cancel" );
		buttonHolder.add( a );
		a.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) {
				setVisible( false ); 
			}} );
			
				
		Button b = new Button( "Ok" );
		buttonHolder.add( b );
		b.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) {
				_bankAccount = _bankMachine.getBank().findAccountByNameAndPassword( _name.getText(), _password.getText() );
			
				if( _bankAccount == null )
					_prompt.setText( "Could not find a bank account with the supplied name and password." );
				else
					setPanel( _interactionPanel );
			}} );
	}
	private void setPanel( Panel p ) {
		_panelHolder.removeAll();
		_panelHolder.add( p, "CENTER" );
		_panelHolder.validate();
		if( p == _interactionPanel ) {
			setTitle( "Account: " + _bankAccount.getName() );
			_balance.setText( "$" + _bankAccount.getBalance() );					
			_interestRate.setText(  _bankAccount.getInterestRate() + "%" );						
		}
		pack();
	}
	

	private void setUpInteractionPanel() {
		
		_interactionPanel.setLayout( new GridBagLayout() );
				
		GridBagConstraints gbc;
		Button b;
		int row = 0;
		
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 0;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( new Label( "Balance: " ), gbc );
		
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 1;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( new Label( "Interest Rate: " ), gbc );
		
		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 0;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( _balance, gbc );
		
		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 1;
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( _interestRate, gbc );
			
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 2;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( _credit, gbc );
		
		gbc = new GridBagConstraints();
		gbc.gridx = 0;
		gbc.gridy = 3;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( _debit, gbc );
		
		b = new Button( "credit()" );
		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 2;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( b, gbc );	
		b.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) {
				try {
					double creditAmount = new Double( _credit.getText() ).doubleValue();
					_bankAccount.credit( creditAmount );
					_balance.setText( "$" + _bankAccount.getBalance() );					
				}
				catch ( NumberFormatException exception ) {
					_prompt.setText( "Credit field was not in numerical form." );
				}
				_bankMachine.updateInfo();
				validate();
			}} );
		
		b = new Button( "debit()" );
		gbc = new GridBagConstraints();
		gbc.gridx = 1;
		gbc.gridy = 3;
		gbc.insets = new Insets( 4,4,4,4 );
		_interactionPanel.add( b, gbc );	
		b.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) {
				try {
					double debitAmount = new Double( _debit.getText() ).doubleValue();
					if( debitAmount < _bankAccount.getBalance() )
						_bankAccount.debit( debitAmount );
					else					
						_prompt.setText( "You can't take out that much." );
					_balance.setText( "$" + _bankAccount.getBalance() );					
				}
				catch ( NumberFormatException exception ) {
					_prompt.setText( "Debit field was not in numerical form." );
				}
				_bankMachine.updateInfo();
				validate();
			}} );
			
			
	}
	
}