package com.example.aminer.qrcode;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.DisplayMetrics;
import android.util.SparseArray;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.Toast;

import com.example.aminer.qrcode.views.BoxDetector;
import com.google.android.gms.common.api.CommonStatusCodes;
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 java.io.IOException;

/**
 * Created by aminer on 18/01/16.
 */

public class ScanBarcodeActivity extends Activity {
    public final static int MY_PERMISSIONS_REQUEST_READ_CONTACTS = 2001;
    private boolean dothecam = true;
    SurfaceView cameraPreview;

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    dothecam = true;
                } else {
                    dothecam = false;
                }
                return;
            }
        }
    }
    View scanBorder;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_scan_barcode);

        cameraPreview = (SurfaceView) findViewById(R.id.camera_preview);
        scanBorder = findViewById(R.id.scanBorder);
        createCameraSource();
    }

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

        Toast.makeText(ScanBarcodeActivity.this, scanBorder.getLayoutParams().width+"", Toast.LENGTH_SHORT).show();
    }

    private void createCameraSource() {
        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        BarcodeDetector detector_1 = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.QR_CODE).build();
        BoxDetector detector = new BoxDetector(detector_1,metrics.widthPixels*3/5,metrics.widthPixels*3/5);
        final CameraSource cameraSource = new CameraSource.Builder(this, detector)
                .setAutoFocusEnabled(true)
                .setRequestedPreviewSize(2018, 2048)
                .build();
        cameraPreview.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                try {
                    if (ActivityCompat.checkSelfPermission(ScanBarcodeActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
                        if (ActivityCompat.shouldShowRequestPermissionRationale(ScanBarcodeActivity.this,
                                Manifest.permission.CAMERA)) {


                        } else {

                            ActivityCompat.requestPermissions(ScanBarcodeActivity.this,
                                    new String[]{Manifest.permission.CAMERA},
                                    MY_PERMISSIONS_REQUEST_READ_CONTACTS);
                        }
                    }
                    if(!dothecam)
                        return;
                    cameraSource.start(cameraPreview.getHolder());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

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

            }

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

        detector.setProcessor(new Detector.Processor<Barcode>() {
            @Override
            public void release() {

            }

            @Override
            public void receiveDetections(Detector.Detections<Barcode> detections) {
                final SparseArray<Barcode> barcodes = detections.getDetectedItems();
                if(barcodes.size()>0){
                    Intent intent = new Intent();
                    intent.putExtra("barcode",barcodes.valueAt(0));
                    setResult(CommonStatusCodes.SUCCESS,intent);
                    finish();
                }
            }
        });
    }
}