package com.gsm_developers.media_recorder_gsm;

import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.IOException;

import static android.Manifest.permission.RECORD_AUDIO;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;

public class MainActivity extends AppCompatActivity {

    private Button startBtn,stopBtn,playBtn,stopPlayingBtn;
    MediaRecorder mediaRecorder;
    MediaPlayer mediaPlayer;
    String AudioSavePathInDevice = null;
    public static final int RequestPermissionCode = 1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        startBtn = (Button) findViewById(R.id.StartButton);
        stopBtn = (Button) findViewById(R.id.StopButton);
        playBtn = (Button) findViewById(R.id.PlayButton);
        stopPlayingBtn = (Button)findViewById(R.id.StopPlayingBtn);

        stopBtn.setEnabled(false);
        playBtn.setEnabled(false);
        stopPlayingBtn.setEnabled(false);

        startBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if(checkPermission()) {

                    AudioSavePathInDevice =
                            Environment.getExternalStorageDirectory().getAbsolutePath() +
                                    "/AudioRecording.3gp";

                    MediaRecorderReady();

                    try {
                        mediaRecorder.prepare();
                        mediaRecorder.start();
                    } catch (IllegalStateException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    startBtn.setEnabled(false);
                    stopBtn.setEnabled(true);

                    Toast.makeText(MainActivity.this, "Recording started",
                            Toast.LENGTH_LONG).show();
                } else {
                    requestPermission();
                }

            }
        });

        stopBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mediaRecorder.stop();
                stopBtn.setEnabled(false);
                playBtn.setEnabled(true);
                startBtn.setEnabled(true);
                stopPlayingBtn.setEnabled(false);

                Toast.makeText(MainActivity.this, "Recording Completed",
                        Toast.LENGTH_LONG).show();
            }
        });

        playBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) throws IllegalArgumentException,
                    SecurityException, IllegalStateException {

                stopBtn.setEnabled(false);
                startBtn.setEnabled(false);
                stopPlayingBtn.setEnabled(true);

                mediaPlayer = new MediaPlayer();
                try {
                    mediaPlayer.setDataSource(AudioSavePathInDevice);
                    mediaPlayer.prepare();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                mediaPlayer.start();
                Toast.makeText(MainActivity.this, "Recording Playing",
                        Toast.LENGTH_LONG).show();
            }
        });

        stopPlayingBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopBtn.setEnabled(false);
                startBtn.setEnabled(true);
                stopPlayingBtn.setEnabled(false);
                playBtn.setEnabled(true);

                if(mediaPlayer != null){
                    mediaPlayer.stop();
                    mediaPlayer.release();
                    MediaRecorderReady();
                }
            }
        });
    }


    public void MediaRecorderReady(){
        mediaRecorder=new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
        mediaRecorder.setOutputFile(AudioSavePathInDevice);
    }


    private void requestPermission() {
        ActivityCompat.requestPermissions(MainActivity.this, new
                String[]{WRITE_EXTERNAL_STORAGE, RECORD_AUDIO}, RequestPermissionCode);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,String permissions[], int[] grantResults) {
        switch (requestCode) {
            case RequestPermissionCode:
                if (grantResults.length> 0) {
                    boolean StoragePermission = grantResults[0] ==
                            PackageManager.PERMISSION_GRANTED;
                    boolean RecordPermission = grantResults[1] ==
                            PackageManager.PERMISSION_GRANTED;

                    if (StoragePermission && RecordPermission) {
                        Toast.makeText(MainActivity.this, "Permission Granted",
                                Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(MainActivity.this,"Permission Denied",Toast.LENGTH_LONG).show();
                    }
                }
                break;
        }
    }

    public boolean checkPermission() {
        int result = ContextCompat.checkSelfPermission(getApplicationContext(),
                WRITE_EXTERNAL_STORAGE);
        int result1 = ContextCompat.checkSelfPermission(getApplicationContext(),
                RECORD_AUDIO);
        return result == PackageManager.PERMISSION_GRANTED &&
                result1 == PackageManager.PERMISSION_GRANTED;
    }
}