package jrummikub.view.impl;

import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import jrummikub.util.Event;
import jrummikub.util.IEvent;

/**
 * A panel that is displayed before a player's turn
 */
@SuppressWarnings("serial")
class PausePanel extends JPanel {
	private final static int PANEL_INSET = 15;
	private final static int PANEL_SEPARATOR = 10;
	private final static float PANEL_FIRST_LINE_HEIGHT = 0.375f;
	private final static int PANEL_MAX_WIDTH = 180;
	private final static float MAX_BUTTON_FONT_SIZE = 12;

	private JLabel pauseLabel;
	private JButton endPauseButton;

	private Event endPauseEvent = new Event();

	/**
	 * Creates a new StartTurnPanel
	 */
	PausePanel() {
		setLayout(null);
		setBorder(new EmptyBorder(PANEL_INSET, PANEL_INSET, PANEL_INSET,
				PANEL_INSET));

		pauseLabel = new JLabel();
		pauseLabel.setHorizontalAlignment(JLabel.CENTER);
		pauseLabel.setHorizontalTextPosition(JLabel.CENTER);
		pauseLabel.setVerticalAlignment(JLabel.CENTER);
		pauseLabel.setVerticalTextPosition(JLabel.CENTER);
		add(pauseLabel);

		endPauseButton = new JButton("Spiel fortsetzen");
		endPauseButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent arg0) {
				endPauseEvent.emit();
			}
		});
		add(endPauseButton);

		addComponentListener(new ComponentAdapter() {
			@Override
			public void componentResized(ComponentEvent e) {
				rescale();
			}
		});
	}

	void setCurrentPlayerName(String playerName) {
		pauseLabel.setText("Der Zug von " + playerName + " ist pausiert.");
	}

	IEvent getEndPauseEvent() {
		return endPauseEvent;
	}

	private void rescale() {
		Insets insets = getInsets();
		int x = insets.left, y = insets.top, width = getWidth() - insets.left
				- insets.right, height = getHeight() - insets.top - insets.bottom;

		if (width > PANEL_MAX_WIDTH) {
			x += (width - PANEL_MAX_WIDTH) / 4;
			width = width / 2 + PANEL_MAX_WIDTH / 2;
		}

		int firstLineHeight = (int) ((height - PANEL_SEPARATOR) * PANEL_FIRST_LINE_HEIGHT);
		int buttonWidth = width;
		int buttonHeight = height - PANEL_SEPARATOR - firstLineHeight;
		float fontSize = (float) Math.sqrt(buttonWidth * buttonHeight) / 5;
		if (fontSize > MAX_BUTTON_FONT_SIZE)
			fontSize = MAX_BUTTON_FONT_SIZE;

		pauseLabel.setBounds(x, y, width, firstLineHeight);
		endPauseButton.setBounds(x, y + firstLineHeight + PANEL_SEPARATOR,
				buttonWidth, buttonHeight);
		endPauseButton.setFont(endPauseButton.getFont().deriveFont(fontSize));
	}
}