package com.game.main;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;

public class Game extends Canvas implements Runnable{

	private static final long serialVersionUID = -473349850293143017L;

	public static final int WIDTH = 640, HEIGHT = WIDTH / 12 * 9;

	private Thread thread;
	private boolean running = false;

	public Game() {
		new Window(WIDTH, HEIGHT, "Snake", this);
	}

	public synchronized void start() {
		thread = new Thread(this);
		thread.start();
		running = true;
	}

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

	public void run() {
		long lastTime = System.nanoTime();
		double amountOfTicks = 60.0;
		double ns = 1000000000 / amountOfTicks;
		double delta = 0;
		long timer = System.currentTimeMillis();
		int frames = 0;
		while(running) {
			long now = System.nanoTime();
			delta += (now - lastTime) / ns;
			lastTime = now;
			while(delta >= 1) {
				tick();
				delta--;
			}
			if(running)
				render();
			frames++;

			if(System.currentTimeMillis() - timer > 1000) {
				timer+= 1000;
				System.out.println("FPS: " + frames);
				frames = 0;
			}
		}
		stop();
	}

	private void tick() {

	}

	private void render() {
		BufferStrategy bs = this.getBufferStrategy();
		if(bs == null) {
			this.createBufferStrategy(3);
			return;
		}

		Graphics g = bs.getDrawGraphics();

		g.setColor(Color.black);
		g.fillRect(0, 0, WIDTH, HEIGHT);

		g.dispose();
		bs.show();
	}

	public static void main(String args[]) {
		new Game();
	}

}