/*
 * J2ME code example. Saving Image on Local Disc.
 * Part of www.RoboHobby.com Java robotics project.
 * www.RoboHobby.com
 */

package com.robohobby.me;

import java.io.IOException;
import java.util.Calendar;
import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;

/**

 * @Ads.Taglet
 * RobotMIDlet
 * @author Oleg Lyubchenko

 */
public class RobotMIDlet extends MIDlet implements CommandListener {

    public boolean midletPaused = false;

    private Player player = null;
    private VideoControl videoControl = null;

    private boolean active = false;
    //public StringItem messageItem;

    byte[] imageByte;

    javax.microedition.lcdui.Image image;
    int w = 256; //160; //256; //320; //640; //160; //132;
    int h = 192; //120; //192; //240; //480; //120; //114;

    int[] rgbData = new int[w * h];

    CallBacks callBacks = CallBacks.getInstance();


    //<editor-fold defaultstate="collapsed" desc=" Generated Fields ">                      

    private Command exitCommand;
    private Command doSnapShotCommand;
    private Command infoItemCommand;
    private Command itemCommand;
    private Command screenCommand;
    private Command getRootsItemCommand;
    private Form form;
    private StringItem infoStringItem;
    //</editor-fold>                    

    /**
     * The RobotMIDlet constructor.
     */
    public RobotMIDlet() {
        callBacks.robotMIDlet = this;
        callBacks.discUtils = new DiscUtils();
    }

    //<editor-fold defaultstate="collapsed" desc=" Generated Methods ">                       

    //</editor-fold>                     

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: initialize ">                                           
    /**
     * Initilizes the application.
     * It is called only once when the MIDlet is started.
     * The method is called before the <code>startMIDlet</code> method.
     */
    private void initialize() {
        // write pre-initialize user code here

        // write post-initialize user code here
    }
    //</editor-fold>                          

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: startMIDlet ">                                        
    /**
     * Performs an action assigned to the Mobile Device - MIDlet Started point.

     */
    public void startMIDlet() {
        // write pre-action user code here
        switchDisplayable(null, getForm());
        // write post-action user code here

    }
    //</editor-fold>                           

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: resumeMIDlet ">                                         

    /**
     * Performs an action assigned to the Mobile Device - MIDlet Resumed point.

     */
    public void resumeMIDlet() {
        // write pre-action user code here

        // write post-action user code here
    }
    //</editor-fold>                            

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: switchDisplayable ">                                              
    /**
     * Switches a current displayable in a display.
     * The <code>display</code> instance is taken from <code>getDisplay</code> method.
     * This method is used by all actions in the design for switching displayable.
     * @param alert the Alert which is temporarily set to the display; 
     * if <code>null</code>, then <code>nextDisplayable</code> is set immediately
     * @param nextDisplayable the Displayable to be set
     */

    public void switchDisplayable(Alert alert, Displayable nextDisplayable) {
        // write pre-switch user code here
        Display display = getDisplay();
        if (alert == null) {
            display.setCurrent(nextDisplayable);
        } else {
            display.setCurrent(alert, nextDisplayable);
        }
        // write post-switch user code here

        //CameraForm cameraForm = new CameraForm();
        //display.setCurrent( cameraForm ); //nextDisplayable);
    }
    //</editor-fold>                                 

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: commandAction for Displayables ">                                                 

    /**
     * Called by a system to indicated that a command has been invoked on a particular displayable.

     * @param command the Command that was invoked
     * @param displayable the Displayable where the command was invoked

     */
    public void commandAction(Command command, Displayable displayable) {
        // write pre-action user code here
        if (displayable == form) {
            if (command == doSnapShotCommand) {
                // write pre-action user code here


                // write post-action user code here
                doSnapShot();
            } else if (command == exitCommand) {
                // write pre-action user code here
                exitMIDlet();
                // write post-action user code here
            } else if (command == getRootsItemCommand) {
                // write pre-action user code here


                // write post-action user code here
                getRoots();
            }
        }
        // write post-action user code here
    }
    //</editor-fold>                             




    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: exitCommand ">                                   
    /**
     * Returns an initiliazed instance of exitCommand component.

     * @return the initialized component instance
     */
    public Command getExitCommand() {
        if (exitCommand == null) {
            // write pre-init user code here

            exitCommand = new Command("Exit", Command.EXIT, 0);
            // write post-init user code here
        }
        return exitCommand;
    }
    //</editor-fold>                       

    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: form ">                                   
    /**
     * Returns an initiliazed instance of form component.

     * @return the initialized component instance
     */
    public Form getForm() {
        if (form == null) {
            // write pre-init user code here

            form = new Form("www.RoboHobby.com", new Item[] { getInfoStringItem() });
            form.addCommand(getExitCommand());
            form.addCommand(getDoSnapShotCommand());
            form.addCommand(getGetRootsItemCommand());
            form.setCommandListener(this);
            // write post-init user code here
            //form.append(infoStringItem);

            initCamera();
        }
        return form;
    }
    //</editor-fold>                       


    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: doSnapShotCommand ">                                   

    /**
     * Returns an initiliazed instance of doSnapShotCommand component.

     * @return the initialized component instance
     */
    public Command getDoSnapShotCommand() {
        if (doSnapShotCommand == null) {
            // write pre-init user code here

            doSnapShotCommand = new Command("SnapAndSave", Command.ITEM, 0);
            // write post-init user code here
        }
        return doSnapShotCommand;
    }
    //</editor-fold>                       

    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: itemCommand ">                                   
    /**
     * Returns an initiliazed instance of itemCommand component.

     * @return the initialized component instance
     */
    public Command getItemCommand() {
        if (itemCommand == null) {
            // write pre-init user code here

            itemCommand = new Command("Item", Command.ITEM, 0);
            // write post-init user code here
        }
        return itemCommand;
    }
    //</editor-fold>                       

    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: infoItemCommand ">                                   
    /**
     * Returns an initiliazed instance of infoItemCommand component.

     * @return the initialized component instance
     */
    public Command getInfoItemCommand() {
        if (infoItemCommand == null) {
            // write pre-init user code here

            infoItemCommand = new Command("State: ", Command.ITEM, 0);
            // write post-init user code here
        }
        return infoItemCommand;
    }
    //</editor-fold>                       

    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: infoStringItem ">                                   
    /**
     * Returns an initiliazed instance of infoStringItem component.

     * @return the initialized component instance
     */
    public StringItem getInfoStringItem() {
        if (infoStringItem == null) {
            // write pre-init user code here

            infoStringItem = new StringItem("Info: ", "");
            // write post-init user code here
        }
        return infoStringItem;
    }
    //</editor-fold>                       



    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: screenCommand ">                                   
    /**
     * Returns an initiliazed instance of screenCommand component.

     * @return the initialized component instance
     */
    public Command getScreenCommand() {
        if (screenCommand == null) {
            // write pre-init user code here

            screenCommand = new Command("Screen", Command.SCREEN, 0);
            // write post-init user code here
        }
        return screenCommand;
    }
    //</editor-fold>                       

    //<editor-fold defaultstate="collapsed" desc=" Generated Getter: getRootsItemCommand ">                                   
    /**
     * Returns an initiliazed instance of getRootsItemCommand component.

     * @return the initialized component instance
     */
    public Command getGetRootsItemCommand() {
        if (getRootsItemCommand == null) {
            // write pre-init user code here

            getRootsItemCommand = new Command("Roots", Command.ITEM, 0);
            // write post-init user code here
        }
        return getRootsItemCommand;
    }
    //</editor-fold>                       


    /**
     * Returns a display instance.
     * @return the display instance.

     */
    public Display getDisplay () {
        return Display.getDisplay(this);
    }

    /**
     * Exits MIDlet.

     */
    public void exitMIDlet() {
        switchDisplayable (null, null);
        destroyApp(true);
        notifyDestroyed();
    }

    private void getRoots()
    {
        this.callBacks.discUtils.getRoots();
    }

    public void doSnapShot()
    {
        System.out.println( "doSnapShot()" );
        captureImage();

        Calendar c = Calendar.getInstance();

        String fileName = StrCalendar.calendarToStrFs(c);

        callBacks.discUtils.writeToDisk( fileName+".jpg", imageByte);
    }

    /**

     * Called when MIDlet is started.
     * Checks whether the MIDlet have been already started and initialize/starts or resumes the MIDlet.

     */
    public void startApp() {

        System.gc();
        Displayable current = Display.getDisplay(this).getCurrent();

        if(current ==null) //first call

        {
            startMIDlet();
            start();
        }
        else //returning from pauseApp
        {
            if(current == form) //callBacks.cameraForm)
            {
                start();
            }
            Display.getDisplay(this).setCurrent(current);
        }

        /*

        if (midletPaused) {
            resumeMIDlet ();
        } else {
            initialize ();
            startMIDlet ();
        }

        midletPaused = false;
         */
    }

    /**
     * Called when MIDlet is paused.

     */
    public void pauseApp() {
        midletPaused = true;
    }

    /**
     * Called to signal the MIDlet to terminate.

     * @param unconditional if true, then the MIDlet has to be
     * unconditionally terminated and all resources has to be released.

     */
    public void destroyApp(boolean unconditional) {
    }


    public void initCamera()
    {
        try

        {
            player = Manager.createPlayer("capture://video");
            player.realize();

            //Grap the Video control and set it to the current display
            videoControl = (VideoControl) (player.getControl("VideoControl"));
            if (videoControl != null) {
                form.append((Item) (videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, null)));
            } else {
                infoStringItem.setText( "No video control" );
            }
        } catch (IOException ioe) {
            infoStringItem.setText( "IOException: " + ioe.getMessage() );
        } catch (MediaException me) {
            infoStringItem.setText( "Camera() Media Exception: " + me.getMessage() );
        } catch (SecurityException se) {
            infoStringItem.setText( "Security Exception: " + se.getMessage() );
        } catch (Exception e) {
            infoStringItem.setText( "Exception: " + e );
        }
    }

    synchronized void start()
    {
        if (!active) {
            try {
                if (player != null) {
                    player.start();
                }
                if (videoControl != null) {
                    videoControl.setVisible(true);
                }
            } catch (MediaException me) {
                infoStringItem.setText(
                        "start() Media Exception: " + me.getMessage());
            } catch (SecurityException se) {
                infoStringItem.setText(
                        "start() Security Exception: " + se.getMessage());
            } catch (Exception e) {
                infoStringItem.setText(
                        "start() Exception: " + e.getMessage());
            }

            active = true;
        }
    }

    synchronized void stop()
    {
        if (active) {
            try {
                if (videoControl != null) {
                    videoControl.setVisible(false);
                }
                if (player != null) {
                    player.stop();
                }

            } catch (MediaException me) {
                infoStringItem.setText(
                        "stop() Media Exception: " + me.getMessage());
            }
            active = false;
        }
    }

    public void captureImage()
    {
        System.gc();

        try {
            imageByte = videoControl.getSnapshot("encoding=jpeg&width=" + w + "&height=" + h);

            image = javax.microedition.lcdui.Image.createImage(imageByte, 0, imageByte.length);

            w = image.getWidth();
            h = image.getHeight();

            infoStringItem.setText(
                    "image OK." + " w=" + w + " h=" + h);
        } catch (Exception e) {
            infoStringItem.setText(
                    "Capt Error! e=" + e);
        }
    }
    ///////////////////////////////////////////////////////////////

}