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

public class AudioVideoItemDialog extends JDialog {
	//views
	private JTextField authorTextField;
	private JTextField titleTextField;
	private JTextField priceTextField;
	private JRadioButton audioRB, videoRB;

	private JSpinner aSpinner;
	private JButton okButton, cancelButton;

	//model
	private StoreItem aStoreItem;

	//transient model
	private String author, title;
	private int quantity;
	private float price;


	//Listeners
	private DocumentListener authorFieldListener;
	private DocumentListener titleFieldListener;
	private DocumentListener studioFieldListener;
	private ChangeListener spinnerListener;
	private DocumentListener priceFieldListener;

	//status
	private int status;
	public static final int APPROVE_OPTION = 0;
	public static final int CANCEL_OPTION = 1;

	public AudioVideoItemDialog(JFrame anOwner, boolean aBoolean, StoreItem 
anItem) {
		super(anOwner, aBoolean);
		initialize(anItem);
	}

	public void initialize(StoreItem anItem) {
		aStoreItem = anItem;
		author=anItem.getAuthor();
		title = anItem.getTitle();
		quantity = anItem.getQuantity();
		price = anItem.getPrice();

		setTitle("Edit audio/video item");
		setLocation(100, 100);
		setSize(400, 300);
		setResizable(false);
		addWindowListener(new WindowAdapter() {
			public void windowOpened(WindowEvent anEvent) {
				update();
			}
			public void windowClosing(WindowEvent anEvent) {
				cancelButtonClicked();
			}
		});

		//build the views and set all the Listeners
		GridLayout layout = new GridLayout(6,2,5,5);
		getContentPane().setLayout(layout);

		JLabel labelAuthor = new JLabel("Author: ");
		labelAuthor.setHorizontalAlignment(SwingConstants.RIGHT);
		getContentPane().add(labelAuthor);

		authorTextField = new JTextField();
		authorFieldListener = new DocumentListener() {
			public void changedUpdate(DocumentEvent theEvent) {
				changedAuthorTextField();
			}
			public void insertUpdate(DocumentEvent theEvent) {
				changedAuthorTextField();
			}
			public void removeUpdate(DocumentEvent theEvent) {
				changedAuthorTextField();
			}
		};
		authorTextField.getDocument().addDocumentListener(authorFieldListener);
		getContentPane().add(authorTextField);

		JLabel labelArtist1 = new JLabel("Title: ");
		labelArtist1.setHorizontalAlignment(SwingConstants.RIGHT);
		getContentPane().add(labelArtist1);

		titleTextField = new JTextField();
		titleFieldListener = new DocumentListener() {
			public void changedUpdate(DocumentEvent theEvent) {
				changedTitleTextField();
			}
			public void insertUpdate(DocumentEvent theEvent) {
				changedTitleTextField();
			}
			public void removeUpdate(DocumentEvent theEvent) {
				changedTitleTextField();
			}
		};
		titleTextField.getDocument().addDocumentListener(titleFieldListener);
		getContentPane().add(titleTextField);



		//third row
		JLabel empty=new JLabel("");
		getContentPane().add(empty);

		JPanel panelRB=new JPanel();         //here you need to add RadioButtonListener
    	ButtonGroup aButtonGroup=new ButtonGroup();
    	audioRB=new JRadioButton("Audio",true);
    	aButtonGroup.add(audioRB);
    	panelRB.add(audioRB);

    	videoRB=new JRadioButton("Video");
    	aButtonGroup.add(videoRB);
    	panelRB.add(videoRB);

    	getContentPane().add(panelRB);

		JLabel labelQuantity = new JLabel("Quantity: ");
		labelQuantity.setHorizontalAlignment(SwingConstants.RIGHT);
		getContentPane().add(labelQuantity);

		aSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 100, 1));
		spinnerListener = new ChangeListener() {
			public void stateChanged(ChangeEvent anEvent) {
				changedSpinner();
			}
		};
		aSpinner.addChangeListener(spinnerListener);
		getContentPane().add(aSpinner);

		JLabel labelPrice = new JLabel("Price: ");
		labelPrice.setHorizontalAlignment(SwingConstants.RIGHT);
		getContentPane().add(labelPrice);

		priceTextField = new JTextField();
		priceFieldListener = new DocumentListener() {
			public void changedUpdate(DocumentEvent theEvent) {
				changedPriceTextField();
			}
			public void insertUpdate(DocumentEvent theEvent) {
				changedPriceTextField();
			}
			public void removeUpdate(DocumentEvent theEvent) {
				changedPriceTextField();
			}
		};
		priceTextField.getDocument().addDocumentListener(priceFieldListener);
		getContentPane().add(priceTextField);

		JLabel labelEmpty = new JLabel("");
		getContentPane().add(labelEmpty);

		JPanel aPanel = new JPanel();
		okButton = new JButton("Ok");
		okButton.setMnemonic('O');
		okButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent anEvent) {
				okButtonClicked();
			}
		});
		aPanel.add(okButton);

		cancelButton = new JButton("Cancel");
		cancelButton.setMnemonic('C');
		cancelButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent anEvent) {
				cancelButtonClicked();
			}
		});
		aPanel.add(cancelButton);

		FlowLayout aLayout = new FlowLayout();
		aLayout.setAlignment(FlowLayout.RIGHT);
		aPanel.setLayout(aLayout);
		getContentPane().add(aPanel);
	}

	    private void changedAuthorTextField() {
			author = authorTextField.getText();
			update();
		}

		private void changedTitleTextField() {
			title = titleTextField.getText();
			update();
		}


		private void changedSpinner(){
			quantity = ((Integer) aSpinner.getValue()).intValue();
			update();
		}

		private void changedPriceTextField(){
			try {
				price = Float.parseFloat(priceTextField.getText());
			}
			catch (NumberFormatException anException) {
			// do nothing
			}
			update();
		}

		private void okButtonClicked() {
			aStoreItem.setAuthor(author);
			aStoreItem.setTitle(title);
			aStoreItem.setQuantity(quantity);
			aStoreItem.setPrice(price);
			status = APPROVE_OPTION;
			dispose();
		}

		private void cancelButtonClicked() {
			status = CANCEL_OPTION;
			dispose();
		}

		//update
		private void update() {
			disableListeners();
			updateAuthorTextField();
			updateTitleTextField();
			updateSpinner();
			updatePriceTextField();
			enableListeners();
		}


		private void updateAuthorTextField() {
			if (!authorTextField.getText().equals(author)) {
				authorTextField.setText(author);
			}
		}

		private void updateTitleTextField() {
			if (!titleTextField.getText().equals(title)) {
				titleTextField.setText(title);
			}
		}


		private void updateSpinner() {
			aSpinner.setValue(new Integer(quantity));
		}

		private void updatePriceTextField() {               //again number format
			try {
				float newPrice = Float.parseFloat(priceTextField.getText());
				if (newPrice != price) {
					priceTextField.setText(new Float(price).toString());
				}
			} catch (NumberFormatException anException) {
				//priceTextField.setText(new Float(price).toString());
			}
		}

		//Enable all the Listeners
		private void enableListeners(){
			authorTextField.getDocument().addDocumentListener(authorFieldListener);
			titleTextField.getDocument().addDocumentListener(titleFieldListener);
			aSpinner.addChangeListener(spinnerListener);
		}

		//Disable all the Listeners
		private void disableListeners(){
			authorTextField.getDocument().removeDocumentListener(authorFieldListener);
			titleTextField.getDocument().removeDocumentListener(titleFieldListener);
			aSpinner.removeChangeListener(spinnerListener);
		}

		public StoreItem getItem() {
			return aStoreItem;
		}

		public int getStatus() {
			return status;
		}
}