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 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)*60/1_000_000_000D;

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

                before = now;

                if (System.currentTimeMillis()-counter >= 1_000) {
                    System.out.println("UPS/FPS: " + 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(3);
            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();
    }

}