// TODO: package

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.CardLayout;
import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


public class GameWindow extends JFrame implements ActionListener {
	public static final Dimension WINDOW_SIZE = new Dimension(600, 400);

	public final String MENU_CARD = "menu";
	public final String SCENE_CARD = "scene";

	private JPanel root;

	private Scene scene = null;
	private Thread sceneThread = null;

	// TODO: remove map editor, start directly on Battle mode
	public GameWindow() {
		super("Subconscious");

		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setSize(WINDOW_SIZE);
		this.setPreferredSize(WINDOW_SIZE);
		this.setLocationRelativeTo(null);

		this.initComponents();

		this.add(this.root, BorderLayout.CENTER);
		this.pack();
		this.setVisible(true);
	}

	private void initComponents() {
		// set up a cardlayout
		this.root = new JPanel(new CardLayout());

		// build Menu card
		JPanel menu = new JPanel();
		menu.setLayout(new GridLayout(3, 1));

		JButton editor = new JButton("Editor");
		editor.setActionCommand("btn-editor");
		editor.addActionListener(this);

		JButton battle = new JButton("Battle");
		battle.setActionCommand("btn-battle");
		battle.addActionListener(this);

		JButton exit = new JButton("Exit");
		exit.setActionCommand("btn-exit");
		exit.addActionListener(this);
		
		menu.add(editor);
		menu.add(battle);
		menu.add(exit);

		// add cards
		this.root.add(menu, MENU_CARD);
	}

	public void showScene(Scene scene) {
		// the current scene is already open
		if (scene == this.scene) {
			((CardLayout)this.root.getLayout()).show(this.root, SCENE_CARD);
			scene.updateCanvasSize();
			scene.resume();

			return;
		}

		// if there is an old scene
		if (this.scene != null) {
			// close old scene
			this.scene.stop();
			try {
				this.sceneThread.join();
			} catch (InterruptedException ex) {
				ex.printStackTrace();
			}
		}

		// build new thread
		this.scene = scene;
		this.sceneThread = new Thread(this.scene);

		// add to layout
		this.root.add(scene, SCENE_CARD);
		((CardLayout)this.root.getLayout()).show(this.root, SCENE_CARD);

		this.sceneThread.start();
		scene.updateCanvasSize();
		scene.resume();
	}

	public void showMenu() {
		this.scene.pause();
		((CardLayout)this.root.getLayout()).show(this, MENU_CARD);
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		if (e.getActionCommand().startsWith("btn")) {
			if (e.getActionCommand().equals("btn-exit")) {
				this.setVisible(false);
				this.dispose();
				return;
			}

			Scene scene = null;

			if (e.getActionCommand().equals("btn-editor")) {
				scene = new MapEditorScene();
			} else if (e.getActionCommand().equals("btn-battle")) {
				scene = new BattleScene();
			}

			if (scene != null) {
				showScene(scene);
			}
		}
	}
}