import java.awt.Canvas;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;

public class Game extends Canvas implements Runnable {

	public static final long serialVersionUID = 1L;
	public static final short WH = 400, W = 400+6, H = 400+28;
	public static final byte UF = 60;
	public static Graphics g;
	public static boolean pause = false;

	public static void main (String[] args) {

		Game game = new Game();
		game.addKeyListener(new Input());
		game.setFocusable(true);

		BufferedImage icon = new BufferedImage(32,32,BufferedImage.TYPE_INT_RGB);
		Graphics2D g2d = icon.createGraphics();
		g2d.setColor(Player.C1);
		g2d.fillRect(0,0,icon.getWidth(),icon.getHeight()/2);
		g2d.setColor(Player.C2);
		g2d.fillRect(0,icon.getHeight()/2,icon.getWidth(),icon.getHeight()/2);

		JFrame frame = new JFrame("The Astronaut");
		frame.add(game);
		frame.pack();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(W,H);
		frame.setResizable(false);
		frame.addKeyListener(new Input());
		frame.setLocationRelativeTo(null);
		frame.setIconImage(icon);
		frame.setVisible(true);

		Level.load(Spawn.levelX,Spawn.levelY);
		Spawn.respawn();
		game.start();

	}

	public void start () {
		setCursor(getToolkit().createCustomCursor(new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR),new Point(0,0),""));
		new Thread(this).start();
	}

	public void run () {

		long before = System.nanoTime(), now;
		double unprocessed = 0;

		long counter = System.currentTimeMillis();
		byte a = 0;

		while (true) {

			if (!pause) {

				now = System.nanoTime();
				unprocessed += (now-before)*UF/1_000_000_000D;

				while (unprocessed >= 1) {
					update();
					render();
					unprocessed--;
					a++;
				}

				before = now;

				if (System.currentTimeMillis()-counter >= 1_000) {
					System.out.println("UF: " + a);
					counter = System.currentTimeMillis();
					a = 0;
				}

			} else {

				before = System.nanoTime();
				unprocessed = 0;
				a = 0;
				counter = System.currentTimeMillis();

				Input.left = false;
				Input.right = false;
				Input.up = false;
				Input.down = false;
				Input.ctrl = false;

				if (!Input.p){
					pause = false;
				}

			}

		}

	}

	public void update () {
		if (Input.p || !hasFocus()){
			pause = true;
			Input.p = true;
			return;
		}
		Level.update();
	}

	public void render () {
		BufferStrategy bs = getBufferStrategy();
		if (bs == null) {
			createBufferStrategy(2);
			return;
		}
		g = bs.getDrawGraphics();
		Level.render();
		if (pause) {
			g.setColor(new Color(0F,0F,0F,1/3F));
			g.fillRect(0,0,Game.WH,Game.WH);
			g.setFont(new Font("Calibri", Font.PLAIN, 20));
			g.setColor(Color.WHITE);
			g.drawString("Press P to continue",Game.WH/2,Game.WH/2);
		}
		g.dispose();
		bs.show();
	}

}