// Standard imports
import java.awt.*;
import java.awt.event.*;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.BufferedInputStream;

import java.net.URL;

import javax.imageio.ImageIO;
import javax.vecmath.Matrix4f;
import javax.vecmath.Vector3f;

import net.java.games.jogl.GLCapabilities;

// Application Specific imports
import org.j3d.aviatrix3d.*;

import org.j3d.aviatrix3d.pipeline.NullCullStage;
import org.j3d.aviatrix3d.pipeline.NullSortStage;
import org.j3d.aviatrix3d.pipeline.DefaultRenderPipeline;
import org.j3d.aviatrix3d.pipeline.SingleThreadRenderManager;
import org.j3d.aviatrix3d.surface.SimpleAWTSurface;

import org.j3d.geom.GeometryData;
import org.j3d.geom.SphereGenerator;
import org.j3d.geom.BoxGenerator;

/**
 * Example application that demonstrates how to put together a single-threaded
 * rendering system.
 *
 * @author Justin Couch
 * @version $Revision: 1.5 $
 */
public class TexturedSphereDemo extends Frame
    implements WindowListener, Runnable
{
    /** Manager for the scene graph handling */
    private SingleThreadRenderManager sceneManager;

    /** Our drawing surface */
    private DrawableSurface surface;

    public TexturedSphereDemo()
    {
        super("Aviatrix 2D Texture Demo");

        setLayout(new BorderLayout());
        addWindowListener(this);

        setupAviatrix();
        setupSceneGraph();

        setSize(600, 600);
        setLocation(40, 40);

        // Need to set visible first before starting the rendering thread due
        // to a bug in JOGL. See JOGL Issue #54 for more information on this.
        // http://jogl.dev.java.net
        setVisible(true);

        Runtime system_runtime = Runtime.getRuntime();
        system_runtime.addShutdownHook(new Thread(this));
    }

    /**
     * Setup the avaiatrix pipeline here
     */
    private void setupAviatrix()
    {
        // Assemble a simple single-threaded pipeline.
        GLCapabilities caps = new GLCapabilities();
        caps.setDoubleBuffered(true);
        caps.setHardwareAccelerated(true);

        CullStage culler = new NullCullStage();
        culler.setOffscreenCheckEnabled(false);

        SortStage sorter = new NullSortStage();
        surface = new SimpleAWTSurface(caps);
        DefaultRenderPipeline pipeline = new DefaultRenderPipeline();

        pipeline.setCuller(culler);
        pipeline.setSorter(sorter);
        pipeline.setDrawableSurface(surface);

        // Render manager
        sceneManager = new SingleThreadRenderManager();
        sceneManager.addPipeline(pipeline);
        sceneManager.setDrawableSurface(surface);
        sceneManager.setMinimumFrameInterval(100);

        // Before putting the pipeline into run mode, put the canvas on
        // screen first.
        Component comp = (Component)surface.getSurfaceObject();
        add(comp, BorderLayout.CENTER);

        Button b = new Button("Press me");
        add(b, BorderLayout.SOUTH);
    }

    /**
     * Setup the basic scene which consists of a quad and a viewpoint
     */
    private void setupSceneGraph()
    {
        // Load the texture image
        ImageTextureComponent2D img_comp = null;
        int img_width = 0;
        int img_height = 0;

        try
        {
            File f = new File("textures/left_cube_map.jpg");
            if(!f.exists())
                System.out.println("Can't find texture source file");

            FileInputStream is = new FileInputStream(f);

            BufferedInputStream stream = new BufferedInputStream(is);
            BufferedImage img = ImageIO.read(stream);

            img_width = img.getWidth(null);
            img_height = img.getHeight(null);
            int format = TextureComponent.FORMAT_RGB;

            switch(img.getType())
            {
                case BufferedImage.TYPE_3BYTE_BGR:
                case BufferedImage.TYPE_CUSTOM:
                case BufferedImage.TYPE_INT_RGB:
                    break;

                case BufferedImage.TYPE_4BYTE_ABGR:
                case BufferedImage.TYPE_INT_ARGB:
                    format = TextureComponent.FORMAT_RGBA;
                    break;
            }

            img_comp = new ImageTextureComponent2D(format,
                                            img_width,
                                            img_height,
                                            img);
        }
        catch(IOException ioe)
        {
            System.out.println("Error reading image: " + ioe);
        }

        // View group
        Viewpoint vp = new Viewpoint();

        Vector3f trans = new Vector3f(0, 0, 1);

        Matrix4f mat = new Matrix4f();
        mat.setIdentity();
        mat.setTranslation(trans);

        TransformGroup tx = new TransformGroup();
        tx.addChild(vp);
        tx.setTransform(mat);

        Group scene_root = new Group();
        scene_root.addChild(tx);

        // Sphere to render the shader onto
        GeometryData data = new GeometryData();
        data.geometryType = GeometryData.TRIANGLES;
        data.geometryComponents = GeometryData.NORMAL_DATA|
                                  GeometryData.TEXTURE_2D_DATA;

        SphereGenerator generator = new SphereGenerator(0.4f, 16);
//        BoxGenerator generator = new BoxGenerator(0.2f, 0.2f, 0.2f);
        generator.generate(data);

        int[] tex_type = { VertexGeometry.TEXTURE_COORDINATE_2 };
        float[][] tex_coord = new float[1][data.vertexCount * 2];

        System.arraycopy(data.textureCoordinates, 0, tex_coord[0], 0,
                         data.vertexCount * 2);

        TriangleArray geom = new TriangleArray();
        geom.setVertices(TriangleArray.COORDINATE_3,
                         data.coordinates,
                         data.vertexCount);
        geom.setNormals(data.normals);
        geom.setTextureCoordinates(tex_type, tex_coord, 1);

        Material material = new Material();
        material.setDiffuseColor(new float[] { 0, 0, 1 });
        material.setEmissiveColor(new float[] { 0, 0, 1 });
        material.setSpecularColor(new float[] { 1, 1, 1 });

        Appearance app = new Appearance();
        app.setMaterial(material);

        if(img_comp != null)
        {
//            Texture2D texture = new Texture2D(Texture.FORMAT_RGB,
//                                              img_comp);

            Texture2D texture = new Texture2D();
            texture.setImages(Texture.MODE_BASE_LEVEL,
                              Texture.FORMAT_RGB,
                              new TextureComponent[] { img_comp },
                              1);

            TextureUnit[] tu = new TextureUnit[1];
            tu[0] = new TextureUnit();
            tu[0].setTexture(texture);

            app.setTextureUnits(tu, 1);
        }

        Shape3D shape = new Shape3D();
        shape.setGeometry(geom);
        shape.setAppearance(app);

        scene_root.addChild(shape);

        Scene scene = new Scene();
        scene.setRenderedGeometry(scene_root);
        scene.setActiveView(vp);

        sceneManager.setScene(scene);
    }

    //---------------------------------------------------------------
    // Methods defined by Runnable
    //---------------------------------------------------------------

    /**
     * Run method for the shutdown hook. This is to deal with someone using
     * ctrl-C to kill the application. Makes sure that all the resources
     * are cleaned up properly.
     */
    public void run()
    {
        shutdownApp();
    }

    //---------------------------------------------------------------
    // Methods defined by WindowListener
    //---------------------------------------------------------------

    /**
     * Ignored
     */
    public void windowActivated(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowClosed(WindowEvent evt)
    {
    }

    /**
     * Exit the application
     *
     * @param evt The event that caused this method to be called.
     */
    public void windowClosing(WindowEvent evt)
    {
        shutdownApp();
        System.exit(0);
    }

    /**
     * Ignored
     */
    public void windowDeactivated(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowDeiconified(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowIconified(WindowEvent evt)
    {
    }

    /**
     * When the window is opened, start everything up.
     */
    public void windowOpened(WindowEvent evt)
    {
        sceneManager.setEnabled(true);
    }

    //---------------------------------------------------------------
    // Local methods
    //---------------------------------------------------------------

    /**
     * Close down the application safely by destroying all the resources
     * currently in use.
     */
    private void shutdownApp()
    {
        sceneManager.setEnabled(false);
        surface.dispose();
    }

    public static void main(String[] args)
    {
        TexturedSphereDemo demo = new TexturedSphereDemo();
        demo.setVisible(true);
    }
}