package firstGame;

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 = -4449141158043388716L;

    private static final int WIDTH = 700, HEIGHT = WIDTH / 12 * 9;

    private Thread thread;
    private boolean running = false;

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

}