package com.voxel.engine.core;

import com.voxel.engine.core.Chunk.Chunk;
import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.glu.GLU;

/**
 * Created with IntelliJ IDEA.
 * User: Toby's PC
 * Date: 06/01/14
 * Time: 15:47
 */
public class Core {

    public Cube cube;
    public Chunk chunk;
    public Chunk chunk2;

    public static final int SCREEN_WIDTH = 640;
    public static final int SCREEN_HEIGHT = 480;
    public static final String TITLE = "Voxel Engine V0.01";

    private float playerX, playerY, playerZ;

    /**
     * Method that is run at the start
     */
    public void start(){
        try{
            createWindow(SCREEN_WIDTH, SCREEN_HEIGHT, TITLE);
            initGL();
            run();
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    /**
     * Creates our window based on values given
     *
     * @param width, Width of our screen
     * @param height, Height of our screen
     * @param title, The title of the game
     */
    public void createWindow(int width, int height, String title){
        try {
            Display.setFullscreen(false);
            Display.setDisplayMode(new DisplayMode(width, height));
            Display.setTitle(title);
            Display.create();
            Display.setVSyncEnabled(true);
        } catch (LWJGLException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }

    /**
     * Init all the graphics components
     */
    public void initGL(){
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        GL11.glClearDepth(1.0);
        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glDepthFunc(GL11.GL_LEQUAL);

        GL11.glEnableClientState(GL11.GL_VERTEX_ARRAY);
        GL11.glEnableClientState(GL11.GL_COLOR_ARRAY);

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();

        GLU.gluPerspective(45.0f, (float) Display.getDisplayMode().getWidth()/ (float)Display.getDisplayMode().getHeight(), 0.1f, 300.0f);

        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
    }



    public void run(){
        cube = new Cube();
        chunk = new Chunk(0,0,0);
        chunk2 = new Chunk(32,0,0);
        float rotateYaw = 1;
        while(!Display.isCloseRequested()){
            try{
                inputManager();
                GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
                GL11.glLoadIdentity();
                GL11.glTranslatef(-30f + playerX, -40f + playerY, -160f + playerZ);
                GL11.glRotatef(45f, 0.4f, 1.0f, 0.1f);
                GL11.glRotatef(45f, 0f, 1.0f, 0f);
                rotateYaw += 1;
                if(rotateYaw % 60 == 0){
                    chunk.rebuildMesh(0,0,0);
                    chunk2.rebuildMesh(32,0,0);
                }
                render();

                Display.update();
                Display.sync(60);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        Display.destroy();
    }

    public void inputManager() {
        if(Keyboard.isKeyDown(Keyboard.KEY_W)){
            playerY--;
        }
        if(Keyboard.isKeyDown(Keyboard.KEY_S)){
            playerY++;
        }
        if(Keyboard.isKeyDown(Keyboard.KEY_A)){
            playerX++;
        }
        if(Keyboard.isKeyDown(Keyboard.KEY_D)){
            playerX--;
        }
        if(Keyboard.isKeyDown(Keyboard.KEY_E)){
            playerZ--;
        }
        if(Keyboard.isKeyDown(Keyboard.KEY_Q)){
            playerZ++;
        }
    }

    public void render(){
        chunk.render();
        chunk2.render();
    }

    public static void main(String[] args){
        Core core = new Core();
        core.start();
    }
}