package pressure;

import pressure.screen.Screen;

import java.awt.Font;
import java.io.InputStream;

import org.lwjgl.LWJGLException;
import org.lwjgl.Sys;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

import org.newdawn.slick.Color;
import org.newdawn.slick.TrueTypeFont;
import org.newdawn.slick.util.ResourceLoader;

public class Main {

    public static Screen screen = new Screen();
    public static TrueTypeFont font;
    private boolean antiAlias = true;
    long lastFrame, lastFPS;
    int fps, currentFPS;

    public void start() {
        initGL(464, 240);
        init();

        while (true) {
            GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
            render();

            Display.update();
            Display.sync(100);

            if (Display.isCloseRequested()) {
                Display.destroy();
                System.exit(0);
            }
        }
    }

    private void initGL(int Width, int Height) {
        try {
            Display.setDisplayMode(new DisplayMode(Width, Height));
            Display.create();
            Display.setTitle("Pressure");
            //Display.setVSyncEnabled(true);
        } catch (LWJGLException e) {
            e.printStackTrace();
            System.exit(0);
        }

        GL11.glClearColor(Palette.BACK_MAIN.getRed() / 255.f, Palette.BACK_MAIN.getGreen() / 255.f, Palette.BACK_MAIN.getBlue() / 255.f, 1f);

        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glDisable(GL11.GL_DEPTH_TEST);
        GL11.glDisable(GL11.GL_LIGHTING);

        GL11.glClearDepth(1);

        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

        GL11.glViewport(0, 0, Width, Height);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glOrtho(0, Width, Height, 0, 1, -1);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
    }

    public void init() {
        lastFPS = getTime();

        try {
            InputStream inputStream = ResourceLoader.getResourceAsStream("pressure/res/font.ttf");

            Font awtFont = Font.createFont(Font.TRUETYPE_FONT, inputStream);
            awtFont = awtFont.deriveFont(8f);
            font = new TrueTypeFont(awtFont, antiAlias);

        } catch (Exception e) {
        }
    }

    public void render() {
        Color.white.bind();

        screen.placeString(3, 1, "It just werks");

        screen.placeString(1, 3, "FPS: " + currentFPS);

        screen.render();

        updateFPS();
    }

    public long getTime() {
        return (Sys.getTime() * 1000) / Sys.getTimerResolution();
    }

    public void updateFPS() {
        if (getTime() - lastFPS > 1000) {
            currentFPS = fps;
            fps = 0;
            lastFPS += 1000;
        }
        fps++;
    }

    public static void main(String[] argv) {
        Main main = new Main();
        main.start();
    }
}