package me.zeroo;

import me.zeroo.graphics.window;

import java.awt.*;
import java.awt.image.BufferStrategy;
import java.util.Random;

public class Game extends Canvas implements Runnable {

    public static void say(String m) { System.out.println("[System] " + m); }

    private int[] windowSize = {
            720,
            720 / 12 * 9
    };

    private String[] info = {
            "dunno",
            "BETA 1.0",
            "Zeroo"
    };

    Thread thread;
    public static boolean running = false;

    public synchronized void start() {
        if(running) return;
        try {
            say("Attempting to create thread...");
            thread = new Thread(this);
            say("Attempting to start thread...");
            thread.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
        running = true;
    }
    public synchronized void stop() {
        if(!running) return;
        try {
            say("Attempting to stop thread...");
            thread.join();
        } catch (Exception e) {
            e.printStackTrace();
        }
        running = false;
    }

    private void tick() {}
    private void render() {
        BufferStrategy bs = getBufferStrategy();
        if(bs == null) {
            createBufferStrategy(3);
        } else {
            try {

                Graphics g = bs.getDrawGraphics();

                //--- simple terrain
                g.setColor(Color.cyan);
                g.fillRect(0, 0, windowSize[0], windowSize[1]);

                //--- dirt
                g.setColor(new Color(205,133,63));
                g.fillRect(0, windowSize[0] / 2, windowSize[0], windowSize[1] / 2);

                g.setColor(Color.black);
                Random random = new Random();
                for(int i = 0; i < 500; i++) {
                    int x = random.nextInt(windowSize[0] + 1 - windowSize[1]) + windowSize[1];
                    int y = random.nextInt(windowSize[0] + 1 - windowSize[1]) + windowSize[1];
                    g.fillRect(x, y, 1, 1);
                }

                // === DRAW === //

                // === DRAW === //

                bs.show();
                g.dispose();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    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;
                //say("FPS: "+ frames);
                frames = 0;
            }
        }
        stop();
    }

    public Game() {
        new window(info[0] + " " + info[1], windowSize[0], windowSize[1], this);
        run();
    }

}