package org.openslx.dozmod.gui.control;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.SystemColor;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JLabel;

import org.openslx.bwlp.thrift.iface.UserInfo;
import org.openslx.dozmod.util.FormatHelper;
import org.openslx.dozmod.util.OpenLinks;

/**
 * A label for displaying a {@link UserInfo} object. Supports a callback event
 * for when the users clicks the label.
 */
@SuppressWarnings("serial")
public class PersonLabel extends JLabel {

	private UserInfo user = null;

	private PersonLabelClickEvent callback = defaultCallback;

	public PersonLabel() {
		this(defaultCallback);
	}

	public PersonLabel(PersonLabelClickEvent cb) {
		setForeground(linkColor());
		this.callback = cb;
		this.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
		addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				if (user != null && callback != null && e.getButton() == MouseEvent.BUTTON1 && getX() >= 0
						&& getY() >= 0) {
					Dimension size = getSize();
					if (size.width > e.getX() && size.height > e.getY())
						callback.clicked(user);
				}
			}
		});
	}

	private Color linkColor() {
		// Create color for links
		SystemColor tc = SystemColor.windowText;
		int r = tc.getRed() * tc.getRed();
		int g = tc.getGreen() * tc.getGreen();
		int b = tc.getBlue() * tc.getBlue();
		b += 30000;
		double factor = 65535 / b;
		if (factor < 1) {
			r *= factor;
			g *= factor;
			b *= factor;
		}
		r = (int) Math.sqrt(r);
		g = (int) Math.sqrt(g);
		b = (int) Math.sqrt(b);
		return new Color(r, g, b);
	}

	/**
	 * Set the callback to call when the user clicks this label using the left
	 * mouse button. Only called if a user is set.
	 * 
	 * @param cb The {@link PersonLabelClickEvent} to call
	 */
	public void setCallback(PersonLabelClickEvent cb) {
		this.callback = cb;
	}

	/**
	 * Set the user to display.
	 */
	public void setUser(UserInfo user) {
		this.user = user;
		if (user == null) {
			setText("");
		} else {
			setText(FormatHelper.userName(user));
		}
	}

	/**
	 * The callback for when this label contains a user and gets clicked.
	 */
	public static interface PersonLabelClickEvent {
		public void clicked(UserInfo user);
	}

	private static final PersonLabelClickEvent defaultCallback = new PersonLabelClickEvent() {
		@Override
		public void clicked(UserInfo user) {
			if (user == null || user.eMail == null)
				return;
			OpenLinks.sendMail(user.eMail, null);
		}
	};

}