package net.eonz.games.e2945;

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;

import javax.swing.JApplet;

public class KeyboardManager implements KeyListener {

    private static class KeyState {
        private boolean state = false;
        public final int keyCode;

        public KeyState(int keyCode) {
            this.keyCode = keyCode;
        }

        public void setState(boolean state) {
            this.state = state;
        }

        public boolean getState() {
            return state;
        }
    }

    private final JApplet applet;
    private final ArrayList<KeyState> states;

    public KeyboardManager(JApplet applet) {
        this.applet = applet;
        this.applet.addKeyListener(this);

        states = new ArrayList<KeyState>();
    }

    public void monitor(int keyCode) {
        states.add(new KeyState(keyCode));
    }

    public boolean getState(int keyCode) {
        for (KeyState s : states.toArray(new KeyState[0])) {
            if (s.keyCode == keyCode) {
                return s.getState();
            }
        }

        monitor(keyCode);
        System.out.println("[Warning] You should register key codes before you check for them. A monitor has been added. ( Key code: " + keyCode + " )");
        return false;
    }

    @Override
    public void keyPressed(KeyEvent e) {
        for (KeyState s : states.toArray(new KeyState[0])) {
            if (s.keyCode == e.getKeyCode()) {
                s.setState(true);
            }
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {
        for (KeyState s : states.toArray(new KeyState[0])) {
            if (s.keyCode == e.getKeyCode()) {
                s.setState(false);
            }
        }
    }

    @Override
    public void keyTyped(KeyEvent e) {

    }

}