package jrummikub.view.impl;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;

import jrummikub.util.Event;
import jrummikub.util.Event1;
import jrummikub.util.IEvent;
import jrummikub.util.IEvent1;
import jrummikub.util.LoginData;
import jrummikub.view.ILoginPanel;

@SuppressWarnings("serial")
class LoginPanel extends JPanel implements ILoginPanel {
	private Event1<LoginData> loginEvent = new Event1<LoginData>();
	private Event cancelEvent = new Event();
	private Event1<String> useDedicatedServer = new Event1<String>();
	private JTextField userNameField;
	private JTextField serverNameField;
	private JTextField passwordField;
	private JTextField channelNameField;
	private JButton startDedicatedServerButton;
	private static final String DEFAULT_PASSWORD = "jrummikub";

	LoginPanel() {
		setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.BOTH;
		c.gridwidth = GridBagConstraints.REMAINDER;
		c.weightx = 1;
		c.weighty = 1;

		ActionListener loginAction = createInputFields();

		c.weighty = 0;
		add(startDedicatedServerButton, c);
		startDedicatedServerButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent arg0) {
				useDedicatedServer
						.emit(passwordField.getText().isEmpty() ? DEFAULT_PASSWORD
								: passwordField.getText());
			}
		});

		c.weighty = 1;
		add(Box.createVerticalGlue(), c);

		c.gridwidth = 1;
		c.weighty = 0;
		JButton loginButton = new JButton("Login");
		loginButton.addActionListener(loginAction);
		add(loginButton, c);

		c.weightx = 0;
		add(Box.createHorizontalStrut(10), c);

		c.gridwidth = GridBagConstraints.REMAINDER;
		c.weightx = 1;
		JButton cancelButton = new JButton("Abbrechen");
		cancelButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent arg0) {
				cancelEvent.emit();
			}
		});
		add(cancelButton, c);

		setBorder(new CompoundBorder(new LineBorder(Color.BLACK), new EmptyBorder(
				10, 10, 10, 10)));
	}

	private ActionListener createInputFields() {
		ActionListener loginAction = new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent arg0) {
				login();
			}
		};

		userNameField = addInputRow("Benutzername:", new JTextField());
		userNameField.addActionListener(loginAction);
		serverNameField = addInputRow("Server:", new JTextField());
		serverNameField.addActionListener(loginAction);
		passwordField = addInputRow("Passwort:", new JPasswordField());
		passwordField.addActionListener(loginAction);
		channelNameField = addInputRow("Channel:", new JTextField());
		channelNameField.addActionListener(loginAction);
		startDedicatedServerButton = new JButton("Dedizierten Server starten");
		// this fixes some strange layouting bug
		startDedicatedServerButton.setPreferredSize(new Dimension(500, 10));
		return loginAction;
	}

	void resetLoginPanel() {
		userNameField.setText("");
		serverNameField.setText("");
		passwordField.setText("");
		channelNameField.setText("jrummikub@muc.universe-factory.net");
	}

	@Override
	public IEvent1<LoginData> getLoginEvent() {
		return loginEvent;
	}

	@Override
	public IEvent getCancelEvent() {
		return cancelEvent;
	}

	@Override
	public IEvent1<String> getUseDedicatedServerEvent() {
		return useDedicatedServer;
	}

	private JTextField addInputRow(String label, JTextField textField) {
		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridwidth = 1;
		c.weightx = 1;
		c.weighty = 0;

		add(new JLabel(label), c);

		c.weightx = 1;
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridwidth = GridBagConstraints.REMAINDER;
		add(textField, c);
		return textField;
	}

	private void login() {
		loginEvent.emit(new LoginData(userNameField.getText(), serverNameField
				.getText(), passwordField.getText().isEmpty() ? DEFAULT_PASSWORD
				: passwordField.getText(), channelNameField.getText()));
	}

	@Override
	public void setServer(String server) {
		serverNameField.setText(server);
	}

	@Override
	public void setChannel(String channel) {
		channelNameField.setText(channel);
	}

	@Override
	public void setDedicatedServerRunning(boolean running) {
		startDedicatedServerButton.setText(running ? "Dedizierten Server nutzen"
				: "Dedizierten Server starten");
	}
}