/**
 * This file is part of WiiuseJ.
 *
 *  WiiuseJ is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  WiiuseJ is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with WiiuseJ.  If not, see <http://www.gnu.org/licenses/>.
 */
package wiiusej.utils;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import wiiusej.wiiuseapievents.ButtonsEvent;
import wiiusej.wiiuseapievents.DisconnectionEvent;
import wiiusej.wiiuseapievents.IREvent;
import wiiusej.wiiuseapievents.MotionSensingEvent;
import wiiusej.wiiuseapievents.StatusEvent;
import wiiusej.wiiuseapievents.WiimoteListener;

/**
 * This panel is used to see what the IR camera of the wiimote sees.
 * @author  guiguito
 */
public class IRPanel extends javax.swing.JPanel implements WiimoteListener {

    private static int MAX_NB_POINTS = 4;
    private Color color = Color.YELLOW;
    private Color backgroundColor = Color.BLACK;
    private Color borderColor = Color.BLUE;
    private Shape shape;
    private Image mImage;//image for double buffering
    private int[] xCoordinates;
    private int[] yCoordinates;
    private int nbPoints=-1;

    /**
     * Default constructor for IR Panel.
     * Background color : black.
     * IR sources color : yellow.
     * Border color of IR sources : blue.
     * Shape of the IR sources : circle with a diameter of 10.
     */
    public IRPanel() {
        shape = new java.awt.geom.Ellipse2D.Double(0, 0, 10, 10);
        initArrays();
        initComponents();
    }
    
    /**
     * Constructor used to parameterize the IR panel.
     * @param bgColor color.
     * @param ptColor IR sources color.
     * @param bdColor border color of IR sources.
     * @param sh Shape of the IR sources.
     */
    public IRPanel(Color bgColor, Color ptColor, Color bdColor, Shape sh) {
        backgroundColor = bgColor;
        color = ptColor;
        borderColor = bdColor;
        shape = sh;
        initArrays();
        initComponents();
    }
    
    private void initArrays(){
        xCoordinates = new int[MAX_NB_POINTS];
        yCoordinates = new int[MAX_NB_POINTS];
        for (int i = 0; i < MAX_NB_POINTS; i++) {
            xCoordinates[i] = -1;
            yCoordinates[i] = -1;
        }
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Dimension d = getSize();
        checkOffScreenImage();
        Graphics offG = mImage.getGraphics();
        offG.setColor(backgroundColor);
        offG.fillRect(0, 0, d.width, d.height);
        Graphics2D g2 = (Graphics2D) mImage.getGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        //draw points
        int i = 0;
        while (i < nbPoints) {
            double x = xCoordinates[i];
            double y = yCoordinates[i];

            long xx = getWidth() - Math.round((double) getWidth() * x / 1024.0);
            long yy = getHeight() - Math.round((double) getHeight() * y / 768.0);
            g2.translate(xx, yy);

            g2.setPaint(borderColor);
            g2.draw(shape);
            g2.setPaint(color);
            g2.fill(shape);

            g2.setTransform(new AffineTransform());
            i++;
        }
        //put offscreen image on the screen
        g.drawImage(mImage, 0, 0, null);
    }

    /**
     * check if the mImage variable has been initialized. If it's not the case it initializes it
     * with the dimensions of the panel. mImage is for double buffering.
     */
    private void checkOffScreenImage() {
        Dimension d = getSize();
        if (mImage == null || mImage.getWidth(null) != d.width || mImage.getHeight(null) != d.height) {
            mImage = createImage(d.width, d.height);
        }
    }

    public void onButtonsEvent(ButtonsEvent arg0) {
        //nothing
    	repaint();
    }

    public void onIrEvent(IREvent arg0) {
        //transfer points
        wiiusej.values.IRSource[] points = arg0.getIRPoints();
        nbPoints = points.length;
        for (int i = 0; i < points.length; i++) {
            xCoordinates[i] = (int) points[i].getRx();
            yCoordinates[i] = (int) points[i].getRy();
        }
        for (int i = points.length; i < MAX_NB_POINTS; i++) {
            xCoordinates[i] = -1;
            yCoordinates[i] = -1;
        }

        //redraw panel
        repaint();
    }

    public void onMotionSensingEvent(MotionSensingEvent arg0) {
    //nothing
    }

    public void onStatusEvent(StatusEvent arg0) {
    //nothing
    }

    public void onDisconnectionEvent(DisconnectionEvent arg0) {
        //clear previous points
        for (int i = 0; i < MAX_NB_POINTS; i++) {
            xCoordinates[i] = -1;
            yCoordinates[i] = -1;
        }
        //redraw panel
        repaint();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}
