package com.example.capture;

import java.io.File;
import java.io.IOException;
import java.util.Date;
import android.app.Activity;
import android.content.Intent;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.Menu;
import android.view.SurfaceView;
import android.widget.Toast;

//http://stackoverflow.com/questions/17042308/select-a-music-file-to-play-with-mediaplayer
//http://stackoverflow.com/questions/2709087/turning-a-string-into-a-uri-android

public class MainActivity extends Activity implements Callback {

    @Override
    protected void onDestroy() {
        stopRecording();
        super.onDestroy();
    }

    private SurfaceHolder surfaceHolder;
    private SurfaceView surfaceView;
    public MediaRecorder mrec = new MediaRecorder();    
    private Camera mCamera;
    private Uri uriSound;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        surfaceView = (SurfaceView) findViewById(R.id.surface_camera);
        
        mCamera = Camera.open();
        
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        
        uriSound=Uri.parse("");
                
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {

        menu.add(0, 0, 0, "Start");
        menu.add(0, 0, 0, "Pick audio track");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        if(item.getTitle().equals("Start"))
        {
            try {
                
                startRecording();
                item.setTitle("Stop");

            } catch (Exception e) {

                String message = e.getMessage();
                Log.i(null, "Problem " + message);
                mrec.release();
            }

        }
        else if(item.getTitle().equals("Stop"))
        {
            mrec.stop();
            mrec.release();
            mrec = null;
            item.setTitle("Start");
        }
        else if(item.getTitle().equals("Pick audio track"))
        {
        	Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(intent, 10);
        }

        return super.onOptionsItemSelected(item);
    }

    protected void startRecording() throws IOException
    {
        if(mCamera==null)
            mCamera = Camera.open();
        
         String filename;
         String path;
        
         path= Environment.getExternalStorageDirectory().getAbsolutePath().toString();
         
         Date date=new Date();
         filename="/rec"+date.toString().replace(" ", "_").replace(":", "_")+".mp4";
         
         //create empty file it must use
         File file=new File(path,filename);
         
        mrec = new MediaRecorder(); 

        mCamera.lock();
        mCamera.unlock();

        // Please maintain sequence of following code. 

        // If you change sequence it will not work.
        mrec.setCamera(mCamera);    
        mrec.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        mrec.setAudioSource(MediaRecorder.AudioSource.MIC);     
        mrec.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mrec.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
        mrec.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mrec.setPreviewDisplay(surfaceHolder.getSurface());
        mrec.setOutputFile(path+filename);
        mrec.prepare();
        mrec.start();

        
    }

    protected void stopRecording() {

        if(mrec!=null)
        {
            mrec.stop();
            mrec.release();
            mCamera.release();
            mCamera.lock();
        }
    }

    private void releaseMediaRecorder() {

        if (mrec != null) {
            mrec.reset(); // clear recorder configuration
            mrec.release(); // release the recorder object
        }
    }

    private void releaseCamera() {
        if (mCamera != null) {
            mCamera.release(); // release the camera for other applications
            mCamera = null;
        }

    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {      

    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {       

        if (mCamera != null) {
            Parameters params = mCamera.getParameters();
            mCamera.setParameters(params);
            Log.i("Surface", "Created");
        }
        else {
            Toast.makeText(getApplicationContext(), "Camera not available!",
                    Toast.LENGTH_LONG).show();

            finish();
        }

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        mCamera.stopPreview();
        mCamera.release();       
        //http://stackoverflow.com/questions/13235306/method-called-after-release-exception-camera-preview
        //mCamera=null;
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

         if(requestCode == RESULT_OK && requestCode == 10){
               uriSound=data.getData();
         }
     }
}