package org.greenstone.gatherer.gui;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import org.greenstone.gatherer.Dictionary;
import org.greenstone.gatherer.Gatherer;
import org.greenstone.gatherer.gui.TextFieldLabel;
import org.greenstone.gatherer.msm.MSMUtils;
import org.greenstone.gatherer.util.Utility;
import org.greenstone.gatherer.gui.SimpleMenuBar;
import org.greenstone.gatherer.gui.ModalDialog;
import org.w3c.dom.*;

/** A lock file dialog is shown whenever GLI detects an existing lock on a collection it is trying to open. The user can look at the details provided with the dialog, and decide whether to 'steal' the lock or to cancel the loading. */
public class LockFileDialog
    extends ModalDialog {

    private int choice;
    private Document document;
    private JButton cancel_button;
    private JButton ok_button;
    private LockFileDialog self;

    static final public int NO_OPTION  = 0;
    static final public int YES_OPTION = 1;

    static final private Dimension LABEL_SIZE = new Dimension(100, 25);
    static final private Dimension SIZE = new Dimension(500, 250);
    static final private int ICON_SIZE = 30;

    public LockFileDialog(JFrame parent, String name, File lock_file) {
	super(parent, get("LockFileDialog.Title"), true);
	setSize(SIZE);
	setJMenuBar(new SimpleMenuBar("2.3"));
	this.self = this;
	// Parse the lock file, but do so quietly so that if the XML is poorly formed it doesn't show exception.
	document = Utility.parse(lock_file, false);
	// Creation
	JPanel content_pane = (JPanel) getContentPane();
	JPanel upper_pane = new JPanel();
	ImageIcon icon = Utility.getImage("lcolicn.gif");
	ImageIcon scaled_icon = new ImageIcon(icon.getImage().getScaledInstance(ICON_SIZE, ICON_SIZE, Image.SCALE_DEFAULT));
	JLabel icon_label = new JLabel(scaled_icon);
	JPanel title_pane = new JPanel();
	JLabel title_one_label = new JLabel(get("General.Warning"));
	JLabel title_two_label = new JLabel(get("LockFileDialog.Lockfile_Message_One"));
	JPanel central_pane = new JPanel();
	JPanel name_pane = new JPanel();
	JLabel name_label = new JLabel(get("LockFileDialog.Name"));
	name_label.setPreferredSize(LABEL_SIZE);
	TextFieldLabel name_field = new TextFieldLabel(name);
	name_field.setBackground(Gatherer.config.getColor("coloring.collection_tree_background", false));
	JPanel person_pane = new JPanel();
	JLabel person_label = new JLabel(get("LockFileDialog.User"));
	person_label.setPreferredSize(LABEL_SIZE);
	TextFieldLabel person_field = new TextFieldLabel(getValue("User"));
	person_field.setBackground(Gatherer.config.getColor("coloring.collection_tree_background", false));
	JPanel machine_pane = new JPanel();
	JLabel machine_label = new JLabel(get("LockFileDialog.Machine"));
	machine_label.setPreferredSize(LABEL_SIZE);
	TextFieldLabel machine_field = new TextFieldLabel(getValue("Machine"));
	machine_field.setBackground(Gatherer.config.getColor("coloring.collection_tree_background", false));
	JPanel created_pane = new JPanel();
	JLabel created_label = new JLabel(get("LockFileDialog.Date"));
	created_label.setPreferredSize(LABEL_SIZE);
	TextFieldLabel created_field = new TextFieldLabel(getValue("Date"));
	created_field.setBackground(Gatherer.config.getColor("coloring.collection_tree_background", false));
	JLabel central_label = new JLabel(get("LockFileDialog.Lockfile_Message_Two"));
	JPanel button_pane = new JPanel();
	ok_button = new JButton(get("General.OK"));
	cancel_button = new JButton(get("General.Cancel"));
	// Connection
	ok_button.addActionListener(new MyActionListener());
	cancel_button.addActionListener(new MyActionListener());
	// Layout
	icon_label.setBorder(BorderFactory.createEmptyBorder(0,0,0,10));

	title_pane.setLayout(new GridLayout(2,1,0,5));
	title_pane.add(title_one_label);
	title_pane.add(title_two_label);

	upper_pane.setLayout(new BorderLayout());
	upper_pane.add(icon_label, BorderLayout.WEST);
	upper_pane.add(title_pane, BorderLayout.CENTER);

	name_pane.setLayout(new BorderLayout());
	name_pane.add(name_label, BorderLayout.WEST);
	name_pane.add(name_field, BorderLayout.CENTER);

	person_pane.setLayout(new BorderLayout());
	person_pane.add(person_label, BorderLayout.WEST);
	person_pane.add(person_field, BorderLayout.CENTER);

	machine_pane.setLayout(new BorderLayout());
	machine_pane.add(machine_label, BorderLayout.WEST);
	machine_pane.add(machine_field, BorderLayout.CENTER);

	created_pane.setLayout(new BorderLayout());
	created_pane.add(created_label, BorderLayout.WEST);
	created_pane.add(created_field, BorderLayout.CENTER);

	central_pane.setLayout(new GridLayout(5,1,0,5));
	central_pane.add(name_pane);
	central_pane.add(person_pane);
	central_pane.add(machine_pane);
	central_pane.add(created_pane);
	central_pane.add(central_label);

	button_pane.setLayout(new GridLayout(1,2,5,0));
	button_pane.add(ok_button);
	button_pane.add(cancel_button);

	content_pane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
	content_pane.setLayout(new BorderLayout());
	content_pane.add(upper_pane, BorderLayout.NORTH);
	content_pane.add(central_pane, BorderLayout.CENTER);
	content_pane.add(button_pane, BorderLayout.SOUTH);
	// Display
	if(parent != null) {
	    Rectangle frame_bounds = parent.getBounds();
	    setLocation(frame_bounds.x + (frame_bounds.width - SIZE.width) / 2, frame_bounds.y + (frame_bounds.height - SIZE.height) / 2);
	}
	else {
	    Dimension screen_size = Toolkit.getDefaultToolkit().getScreenSize();
	    setLocation((screen_size.width - SIZE.width) / 2, (screen_size.height - SIZE.height) / 2);
	}
    }

    public int getChoice() {
	setVisible(true);
	return choice;
    }

    private String getValue(String name) {
	String value = "";
	if(document != null) {
	    try {
		Element value_element = (Element) MSMUtils.getNodeFromNamed(document.getDocumentElement(), name);
		value = MSMUtils.getValue(value_element);
	    }
	    catch (Exception error) {
	    }
	}
	else {
	    value = get("LockFileDialog.Error");
	}
	return value;
    }

    private class MyActionListener
	implements ActionListener {
	public void actionPerformed(ActionEvent event) {
	    if(event.getSource() == ok_button) {
		choice = YES_OPTION;
	    }
	    else {
		choice = NO_OPTION;
	    }
	    self.dispose();
	}
    }

    static public void main(String[] args) {
	JFrame frame = new JFrame();
	frame.setSize(640,480);
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.show();
	LockFileDialog dialog = new LockFileDialog(frame, "Test", new File(args[0]));
	int choice = dialog.getChoice();
    }

    static private String get(String key) {
	if(key.indexOf(".") == -1) {
	    key = "LockFileDialog." + key;
	}
	return Gatherer.dictionary.get(key);
    }
}