package com.clcbio.api.structure.viewer.experimental;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLJPanel;
import javax.swing.JFrame;

import com.jogamp.opengl.util.FPSAnimator;

public class SimpleJoglTest implements GLEventListener {

    private float theta;
    private float s;
    private float c;

    public static void main(String[] args) {
        GLCapabilities caps = new GLCapabilities(GLProfile.getDefault());
        caps.setNumSamples(2);
        caps.setSampleBuffers(true);

        SimpleJoglTest test = new SimpleJoglTest();
        GLJPanel canvas = new GLJPanel(caps);
        // GLCanvas canvas = new GLCanvas(caps); <-- this works.

        JFrame frame = new JFrame("GLJPanel Window Test");
        frame.setSize(300, 300);
        frame.add(canvas);
        frame.setVisible(true);

        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        canvas.addGLEventListener(test);
        FPSAnimator anim = new FPSAnimator(canvas, 1);
        anim.start();
    }

    @Override
    public void dispose(GLAutoDrawable drawable) {
        System.out.println("Dispose");
    }

    @Override
    public void init(GLAutoDrawable drawable) {
        System.out.println("Init");
    }

    @Override
    public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) {
        System.out.println("Reshape");
    }

    public void drawSomething(GL2 gl) {
        gl.glBegin(GL.GL_TRIANGLES);
        gl.glColor3f(1, 0, 0);
        gl.glVertex3f(-c, -c, 0);
        gl.glColor3f(0, 1, 0);
        gl.glVertex3f(0, c, 0);
        gl.glColor3f(0, 0, 1);
        gl.glVertex3f(s, -s, 0);
        gl.glEnd();
    }

    @Override
    public void display(GLAutoDrawable drawable) {
        theta += 0.1;
        s = (float) Math.sin(theta);
        c = (float) Math.cos(theta);

        GL2 gl = drawable.getGL().getGL2();
        gl.glClearColor(1.0f, 0.0f, 1.0f, 1.0f);
        gl.glClear(GL.GL_COLOR_BUFFER_BIT);

        drawSomething(gl);
    }

}