package net.newbiehacker.nirc.ui;

import java.awt.image.*;
import java.awt.*;
import java.awt.Image;

/**
 * @author newbiehacker
 */
public final class DrawingCanvas extends Canvas implements ImageProducer, ImageObserver {
    private ColorModel cmod;
    private Image render;
    private Graphics graphics;
    private ImageConsumer cons;

    public DrawingCanvas(int w, int h) {
        Renderer.init(w, h);
        cmod = new DirectColorModel(32, 0xff0000, 0xff00, 0xff);
        render = createImage(this);
        updateRender();
        prepareImage(render, this);
        updateRender();
        prepareImage(render, this);
        updateRender();
        prepareImage(render, this);
    }

    public void initGraphics() {
        graphics = getGraphics();
    }

    public void draw() {
        updateRender();
        graphics.drawImage(render, 0, 0, this);
    }

    public synchronized void addConsumer(ImageConsumer consumer) {
        cons = consumer;
        consumer.setDimensions(Renderer.width, Renderer.height);
        consumer.setProperties(null);
        consumer.setColorModel(cmod);
        consumer.setHints(ImageConsumer.TOPDOWNLEFTRIGHT | ImageConsumer.COMPLETESCANLINES | ImageConsumer.SINGLEPASS);
    }

    public synchronized boolean isConsumer(ImageConsumer consumer) {
        return cons == consumer;
    }

    public synchronized void removeConsumer(ImageConsumer consumer) {
        if (cons == consumer)
            cons = null;
    }

    public void startProduction(ImageConsumer consumer) {
        addConsumer(consumer);
    }

    public void requestTopDownLeftRightResend(ImageConsumer consumer) {
        System.out.println("TDLR");
    }

    private synchronized void updateRender() {
        if (cons != null) {
            cons.setPixels(0, 0, Renderer.width, Renderer.height, cmod, Renderer.pix, 0, Renderer.width);
            cons.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
        }
    }

    public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h) {
        return true;
    }

    protected void finalize() throws Throwable {
        super.finalize();
        cmod = null;
        render = null;
        graphics = null;
        cons = null;
    }
}