package sig;
import javax.imageio.ImageIO;
import javax.swing.JFrame;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener; 
import java.awt.event.MouseMotionListener;
import java.io.File;
import java.io.IOException;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Arrays;
import java.util.List;
import java.awt.Toolkit;
import java.awt.BorderLayout;

public class SigRenderer implements KeyListener,MouseListener,MouseMotionListener{

    public static boolean WIREFRAME = true;

    public static Mesh cube;
    public static int SCREEN_WIDTH=1280;
    public static int SCREEN_HEIGHT=720;
    public final static long TIMEPERTICK = 16666667l;
    public static float DRAWTIME=0;
    public static float DRAWLOOPTIME=0;
    public static final float RESOLUTION=1;
    public static float rot = (float)Math.PI/4; //In radians.

    public static List<Pixel> pixels;

    public static float fNear = 0.1f;
    public static float fFar = 1000f;
    public static float fFov = 90f;
    public static float fAspectRatio = (float)SCREEN_HEIGHT/SCREEN_WIDTH;
    public static Matrix matProj = Matrix.MakeProjection(fFov,fAspectRatio,fNear,fFar);

    public static Vector vCamera = new Vector();
    public static Vector vLookDir = new Vector(0,0,1);
    public static float yaw = 0;

    final float MOVESPEED = 0.03f;
    final float TURNSPEED = 0.03f;

    public static Texture dirtTex;

    boolean upHeld=false,downHeld=false,leftHeld=false,rightHeld=false,
    aHeld=false,sHeld=false,dHeld=false,wHeld=false;

    public void runGameLoop() {
        if (upHeld) {
            vCamera.y+=MOVESPEED;
        }
        if (downHeld) {
            vCamera.y-=MOVESPEED;
        }
        if (rightHeld) {
            vCamera.x-=MOVESPEED;
        }
        if (leftHeld) {
            vCamera.x+=MOVESPEED;
        }
        if (wHeld||sHeld) {
            Vector forward = Vector.multiply(vLookDir,MOVESPEED);
            if (wHeld) {
                vCamera = Vector.add(vCamera,forward);
            }
            if (sHeld) {
                vCamera = Vector.subtract(vCamera,forward);
            }
        }
        if (aHeld) {
            yaw-=TURNSPEED;
        }
        if (dHeld) {
            yaw+=TURNSPEED;
        }
    }

    SigRenderer(JFrame f) {
        dirtTex = new Texture(new File("dirt.png"));

        //cube = new Mesh(OBJReader.ReadOBJFile("teapot.obj"));
        cube = new Mesh(Arrays.asList(
            new Triangle[]{
                new Triangle(new Vector(),new Vector(0,1,0),new Vector(1,1,0),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(),new Vector(1,1,0),new Vector(1,0,0),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
                new Triangle(new Vector(1,0,0),new Vector(1,1,0),new Vector(1,1,1),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(1,0,0),new Vector(1,1,1),new Vector(1,0,1),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
                new Triangle(new Vector(1,0,1),new Vector(1,1,1),new Vector(0,1,1),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(1,0,1),new Vector(0,1,1),new Vector(0,0,1),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
                new Triangle(new Vector(0,0,1),new Vector(0,1,1),new Vector(0,1,0),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(0,0,1),new Vector(0,1,0),new Vector(0,0,0),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
                new Triangle(new Vector(0,1,0),new Vector(0,1,1),new Vector(1,1,1),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(0,1,0),new Vector(1,1,1),new Vector(1,1,0),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
                new Triangle(new Vector(1,0,1),new Vector(0,0,1),new Vector(0,0,0),new Vector2(0,1),new Vector2(0,0),new Vector2(1,0)),
                new Triangle(new Vector(1,0,1),new Vector(0,0,0),new Vector(1,0,0),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
            }));

        Panel p = new Panel();

        f.getContentPane().addMouseListener(this);
        f.getContentPane().addMouseMotionListener(this);
        f.addKeyListener(this);
        f.setSize(SCREEN_WIDTH,SCREEN_HEIGHT);
        f.add(p,BorderLayout.CENTER);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
        p.init();
        

        new Thread() {
            public void run(){
                while (true) {
                    long startTime = System.nanoTime();
                    runGameLoop();
                    p.repaint();
                    Toolkit.getDefaultToolkit().sync();
                    long endTime = System.nanoTime();
                    long diff = endTime-startTime;
                    try {
                        long sleepTime = TIMEPERTICK - diff;
                        long millis = (sleepTime)/1000000;
                        int nanos = (int)(sleepTime-(((sleepTime)/1000000)*1000000));
                        //System.out.println("FRAME DRAWING: Sleeping for ("+millis+"ms,"+nanos+"ns) - "+(diff)+"ns");
                        DRAWTIME = (float)diff/1000000;
                        f.setTitle("Game Loop: "+DRAWTIME+"ms, Draw Loop: "+DRAWLOOPTIME+"ms");
                        if (sleepTime>0) {
                            Thread.sleep(millis,nanos);
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }.start();
    }
    public static void main(String[] args) {
        JFrame f = new JFrame("SigRenderer");
        new SigRenderer(f);
    }

    @Override
    public void mouseClicked(MouseEvent e) {
    }

    @Override
    public void mousePressed(MouseEvent e) {
    }

    @Override
    public void mouseReleased(MouseEvent e) {
    }

    @Override
    public void mouseEntered(MouseEvent e) {
    }

    @Override
    public void mouseExited(MouseEvent e) {
    }

    @Override
    public void mouseDragged(MouseEvent e) {
    }

    @Override
    public void mouseMoved(MouseEvent e) {
    }

    @Override
    public void keyTyped(KeyEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void keyPressed(KeyEvent e) {
        switch (e.getKeyCode()) {
            case KeyEvent.VK_UP:{
                upHeld=true;
            }break;
            case KeyEvent.VK_RIGHT:{
                rightHeld=true;
            }break;
            case KeyEvent.VK_LEFT:{
                leftHeld=true;
            }break;
            case KeyEvent.VK_DOWN:{
                downHeld=true;
            }break;
            case KeyEvent.VK_W:{
                wHeld=true;
            }break;
            case KeyEvent.VK_D:{
                dHeld=true;
            }break;
            case KeyEvent.VK_A:{
                aHeld=true;
            }break;
            case KeyEvent.VK_S:{
                sHeld=true;
            }break;
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {
        switch (e.getKeyCode()) {
            case KeyEvent.VK_UP:{
                upHeld=false;
            }break;
            case KeyEvent.VK_RIGHT:{
                rightHeld=false;
            }break;
            case KeyEvent.VK_LEFT:{
                leftHeld=false;
            }break;
            case KeyEvent.VK_DOWN:{
                downHeld=false;
            }break;
            case KeyEvent.VK_W:{
                wHeld=false;
            }break;
            case KeyEvent.VK_D:{
                dHeld=false;
            }break;
            case KeyEvent.VK_A:{
                aHeld=false;
            }break;
            case KeyEvent.VK_S:{
                sHeld=false;
            }break;
        }
    }
}