import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnInitListener {
    private EditText words = null;
    private Button speakBtn = null;
    private EditText filename = null;
    private Button recordBtn = null;
    private Button playBtn = null;
    private EditText useWith = null;
    private Button assocBtn = null;
    private String soundFilename = null;
    private File soundFile = null;
    private static final int REQ_TTS_STATUS_CHECK = 0;
    private static final String TAG = "TTS Demo";
    private TextToSpeech mTts = null;
    private MediaPlayer player = null;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        words = (EditText)findViewById(R.id.wordsToSpeak);
        filename = (EditText)findViewById(R.id.filename);
        useWith = (EditText)findViewById(R.id.realText);

        speakBtn = (Button)findViewById(R.id.speakBtn);
        speakBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                mTts.speak(words.getText().toString(), TextToSpeech.QUEUE_ADD, null);
            }});

        recordBtn = (Button)findViewById(R.id.recordBtn);
        recordBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                soundFilename = filename.getText().toString();
                soundFile = new File(soundFilename);
                if (soundFile.exists())
                    soundFile.delete();

                if(mTts.synthesizeToFile(words.getText().toString(), null, soundFilename)
                        == TextToSpeech.SUCCESS) {
                    Toast.makeText(getBaseContext(),
                            "Sound file created",
                            Toast.LENGTH_SHORT).show();
                    playBtn.setEnabled(true);
                    assocBtn.setEnabled(true);
                }
                else {
                    Toast.makeText(getBaseContext(),
                            "Oops! Sound file not created",
                            Toast.LENGTH_SHORT).show();
                }
            }});

        playBtn = (Button)findViewById(R.id.playBtn);
        playBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                try {
                    player = new MediaPlayer();
                    player.setDataSource(soundFilename);
                    player.prepare();
                    player.start();
                }
                catch(Exception e) {
                    Toast.makeText(getBaseContext(),
                            "Hmmmmm. Can't play file",
                            Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }
            }});

        assocBtn = (Button)findViewById(R.id.assocBtn);
        assocBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                mTts.addSpeech(useWith.getText().toString(), soundFilename);
                Toast.makeText(getBaseContext(),
                     "Associated!",
                     Toast.LENGTH_SHORT).show();
            }});

        // Check to be sure that TTS exists and is okay to use
        Intent checkIntent = new Intent();
        checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
        startActivityForResult(checkIntent, REQ_TTS_STATUS_CHECK);
    }
    
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQ_TTS_STATUS_CHECK) {
            switch (resultCode) {
            case TextToSpeech.Engine.CHECK_VOICE_DATA_PASS:
                // TTS is up and running
                mTts = new TextToSpeech(this, this);
                Log.v(TAG, "Pico is installed okay");
                break;
            case TextToSpeech.Engine.CHECK_VOICE_DATA_BAD_DATA:
            case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA:
            case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_VOLUME:
                // missing data, install it
                Log.v(TAG, "Need language stuff: " + resultCode);
                Intent installIntent = new Intent();
                installIntent.setAction(
                    TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
                startActivity(installIntent);
                break;
            case TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL:
            default:
                Log.e(TAG, "Got a failure. TTS apparently not available");
            }
        }
        else {
            // Got something else
        }
    }

    @Override
    public void onInit(int status) {
        // Now that the TTS engine is ready, we enable buttons
        if( status == TextToSpeech.SUCCESS) {
            speakBtn.setEnabled(true);
            recordBtn.setEnabled(true);
        }
    }

    @Override
    public void onPause()
    {
        super.onPause();
        // if we're losing focus, stop playing
        if(player != null) {
            player.stop();
        }
        // if we're losing focus, stop talking
        if( mTts != null)
            mTts.stop();
    }

    @Override
    public void onDestroy()
    {
        super.onDestroy();
        if(player != null) {
            player.release();
        }
        if( mTts != null) {
            mTts.shutdown();
        }
    }
}