package Main;

import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;

import javax.swing.JFrame;

import GameState.GameStateManager;
import Graphics.Screen;
import Level.Tile.Tile;

@SuppressWarnings("serial") public class Game extends Canvas implements Runnable{

	public static final int WIDTH = 320;
	public static final int HEIGHT = 240;
	public static final int SCALE = 2;
	public static String TITLE = "Game";

	private Thread thread;
	private JFrame frame;
	public static Screen screen;
	private boolean isRunning = false;


	private Graphics2D g;

	public static GameStateManager gsm;

	private static BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
	public static int[] pixels = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();

	public Game() {
		Dimension size = new Dimension(WIDTH * SCALE, HEIGHT * SCALE);
		setPreferredSize(size);

		frame = new JFrame();
		screen = new Screen(WIDTH, HEIGHT);

		addKeyListener(new Listener());
	}

	public synchronized void start() {
		isRunning = true;
		thread = new Thread(this, "Display");
		thread.start();
	}

	public synchronized void stop() {
		isRunning = false;
		try {
			thread.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	private void init() {

		g = (Graphics2D) image.getGraphics();

		gsm = new GameStateManager();
	}

	@Override
	public void run() {

		init();

		long lastTime = System.nanoTime();
		long timer = System.currentTimeMillis();
		final double ns = 1000000000.0 / 60.0;
		double delta = 0;
		int frames = 0;
		int updates = 0;

		requestFocus();

		while (isRunning) {
			long now = System.nanoTime();
			delta += (now - lastTime) / ns;
			lastTime = now;

			while (delta >= 1) {
				update();
				updates++;
				delta--;
			}

			draw();
			drawToScreen();
			frames++;

			// one second || 1000 ns = 1 sec

			if (System.currentTimeMillis() - timer > 1000) {
				timer += 1000;
				// System.out.println(updates + " ups, " + frames + " fps");
				frame.setTitle(TITLE + " | " + updates + " ups, " + frames + " fps");
				frames = 0;
				updates = 0;
			}
		}
		stop();
	}

	public void update() {
		gsm.update();
	}

	private void draw() {
		gsm.draw(g);

		screen.clear();


		test();
	}

	public void test() {

	}

	private void drawToScreen() {
		Graphics g2 = getGraphics();
		g2.drawImage(image, 0, 0, WIDTH * SCALE , HEIGHT * SCALE , null);
		g2.dispose();
	}

	public static void main(String[] args) {
		Game game = new Game();
		game.frame.setResizable(false);
		game.frame.setTitle(TITLE);
		game.frame.add(game);
		game.frame.pack();
		game.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		game.frame.setLocationRelativeTo(null);
		game.frame.setVisible(true);

		game.start();
	}

}