/*------------------------------------------------------------------------------
 **     Ident: Sogeti Smart Mobile Solutions
 **    Author: rene
 ** Copyright: (c) Apr 24, 2011 Sogeti Nederland B.V. All Rights Reserved.
 **------------------------------------------------------------------------------
 ** Sogeti Nederland B.V.            |  No part of this file may be reproduced  
 ** Distributed Software Engineering |  or transmitted in any form or by any        
 ** Lange Dreef 17                   |  means, electronic or mechanical, for the      
 ** 4131 NJ Vianen                   |  purpose, without the express written    
 ** The Netherlands                  |  permission of the copyright holder.
 *------------------------------------------------------------------------------
 *
 *   This file is part of OpenGPSTracker.
 *
 *   OpenGPSTracker 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.
 *
 *   OpenGPSTracker 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 OpenGPSTracker.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package nl.sogeti.android.gpstracker.streaming;

import nl.sogeti.android.gpstracker.R;
import nl.sogeti.android.gpstracker.util.Constants;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.speech.tts.TextToSpeech;
import android.util.Log;

public class VoiceOver extends BroadcastReceiver implements TextToSpeech.OnInitListener
{
   private static VoiceOver sVoiceOver = null;
   private static final String TAG = "OGT.VoiceOver";
   
   public static synchronized void initStreaming(Context ctx)
   {
      if( sVoiceOver != null )
      {
         shutdownStreaming(ctx);
      }
      sVoiceOver = new VoiceOver(ctx);

      IntentFilter filter = new IntentFilter(Constants.STREAMBROADCAST);   
      ctx.registerReceiver(sVoiceOver, filter);
   }

   public static synchronized void shutdownStreaming(Context ctx)
   {
      if( sVoiceOver != null )
      {
         ctx.unregisterReceiver(sVoiceOver);
         sVoiceOver.onShutdown();
         sVoiceOver = null;
      }
   }

   private TextToSpeech mTextToSpeech;
   private int mVoiceStatus = -1;
   private Context mContext;
   
   public VoiceOver(Context ctx)
   {
      mContext = ctx.getApplicationContext();
      mTextToSpeech = new TextToSpeech(mContext, this);
   }

   public void onInit(int status)
   {
      mVoiceStatus = status;
   }
   
   private void onShutdown()
   {
      mVoiceStatus = -1;
      mTextToSpeech.shutdown();
   }
   
   @Override
   public void onReceive(Context context, Intent intent)
   {
      if( mVoiceStatus == TextToSpeech.SUCCESS )
      {
         int meters = intent.getIntExtra(Constants.EXTRA_DISTANCE, 0);
         int minutes = intent.getIntExtra(Constants.EXTRA_TIME, 0);
         String myText = context.getString(R.string.voiceover_speaking, minutes, meters);
         mTextToSpeech.speak(myText, TextToSpeech.QUEUE_ADD, null);
      }
      else
      {
         Log.w(TAG, "Voice stream failed TTS not ready");
      }
   }
}