package monnethic.mobile.qrcode;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.SparseArray;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.monnthic.monnethicmobile.R;
import com.google.android.gms.vision.CameraSource;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.barcode.Barcode;
import com.google.android.gms.vision.barcode.BarcodeDetector;

import monnethic.mobile.transaction.ApprovePayementActivity;

public class QrCodeScannerActivity extends AppCompatActivity {
    SurfaceView surfaceView;
    private BarcodeDetector barcodeDector;
    private CameraSource cameraSource;
    private static final int REQUEST_CAMERA_PERMISSION = 201;
    private String intentData = "";


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

    private void initViews(){
        surfaceView = findViewById(R.id.surfaceView);
    }

    private void initialiseDetector(){
        Toast.makeText(getApplicationContext(), "QR code scanner started", Toast.LENGTH_SHORT).show();

        barcodeDector = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.ALL_FORMATS).build();
        cameraSource = new CameraSource.Builder(this, barcodeDector).setRequestedPreviewSize(1920,1080).setAutoFocusEnabled(true).build();

        surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder surfaceHolder) {
                try{
                    if(ActivityCompat.checkSelfPermission(QrCodeScannerActivity.this, Manifest.permission.CAMERA)== PackageManager.PERMISSION_GRANTED){
                        cameraSource.start(surfaceView.getHolder());
                    }else{
                        ActivityCompat.requestPermissions(QrCodeScannerActivity.this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
                    }
                }catch (Exception e){
                    e.getMessage();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
                cameraSource.stop();
            }
        });

        barcodeDector.setProcessor(new Detector.Processor<Barcode>() {
            @Override
            public void release() {
                Toast.makeText(getApplicationContext(),"Barcode scanner has been stopped",Toast.LENGTH_SHORT).show();
            }

            @Override
            public void receiveDetections(Detector.Detections<Barcode> detections) {
                final SparseArray<Barcode> barcodes = detections.getDetectedItems();
                if(barcodes.size()!=0){
                    intentData = barcodes.valueAt(0).displayValue;
                    Intent scannedQrIntent = new Intent(QrCodeScannerActivity.this, ApprovePayementActivity.class);
                    scannedQrIntent.putExtra("valueScanned",intentData);
                    QrCodeScannerActivity.this.startActivity(scannedQrIntent);

                }
            }
        });
    }

    @Override
    protected void onPause(){
        super.onPause();
        cameraSource.release();
    }

    @Override
    protected void onResume(){
        super.onResume();
        initialiseDetector();
    }
}