package de.golbros.capacitorqrscanner;

import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import me.dm7.barcodescanner.zxing.ZXingScannerView;

public class QRScanner extends AppCompatActivity implements ZXingScannerView.ResultHandler {
    private ZXingScannerView mScannerView;
    public static final int PERMISSION_REQUEST_CAMERA = 1;
    private ArrayList<Integer> mSelectedIndices;
    @SuppressLint("NewApi")
    @Override
    public void onCreate(Bundle state) {
        super.onCreate(state);

        mScannerView = new ZXingScannerView(this);
        setContentView(mScannerView);

        ActionBar actionBar = getSupportActionBar();
        actionBar.hide();

        if (!haveCameraPermission())
            requestPermissions(new String[]{Manifest.permission.CAMERA}, PERMISSION_REQUEST_CAMERA);
    }

    private boolean haveCameraPermission()
    {
        if (Build.VERSION.SDK_INT < 23)
            return true;
        return checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        // This is because the dialog was cancelled when we recreated the activity.
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (permissions.length == 0 || grantResults.length == 0)
            return;

        switch (requestCode) {
            case PERMISSION_REQUEST_CAMERA: {
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    startCamera();
                } else {
                    finish();
                }
            }
            break;
        }
    }
    public void setupFormats() {
        List<BarcodeFormat> formats = new ArrayList<BarcodeFormat>();
        if(mSelectedIndices == null || mSelectedIndices.isEmpty()) {
            mSelectedIndices = new ArrayList<Integer>();
            for(int i = 0; i < ZXingScannerView.ALL_FORMATS.size(); i++) {
                mSelectedIndices.add(i);
            }
        }

        for(int index : mSelectedIndices) {
            formats.add(ZXingScannerView.ALL_FORMATS.get(index));
        }
        if(mScannerView != null) {
            mScannerView.setFormats(formats);
        }
    }

    public void startCamera()
    {
        setupFormats();
        mScannerView.setResultHandler(this); // Register ourselves as a handler for scan results.
        mScannerView.startCamera();          // Start camera on resume
    }

    @Override
    public void onResume() {
        super.onResume();
        // Register ourselves as a handler for scan results.
        mScannerView.setResultHandler(this);
        // Start camera on resume
        mScannerView.startCamera();
    }

    @Override
    public void onPause() {
        super.onPause();
        // Stop camera on pause
        mScannerView.stopCamera();
    }

    @Override
    public void handleResult(Result rawResult) {
        Log.d("SCANRESULT", rawResult.getText());
        Intent intent = new Intent();
        intent.putExtra("code", rawResult.getText());
        setResult(RESULT_OK, intent);
        finish();
    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        setResult(RESULT_CANCELED, new Intent());
        finish();
    }
}