package com.evsuite.abrp;

import android.graphics.Bitmap;
import android.graphics.Color;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

import java.util.EnumMap;
import java.util.Map;

/** Generates the repository QR locally; no network capability is involved. */
final class QrCode {
    private QrCode() {}

    static Bitmap generate(String content, int sizePx) {
        try {
            Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
            hints.put(EncodeHintType.MARGIN, 1);
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix matrix = new MultiFormatWriter().encode(
                    content, BarcodeFormat.QR_CODE, sizePx, sizePx, hints);
            Bitmap bitmap = Bitmap.createBitmap(sizePx, sizePx, Bitmap.Config.RGB_565);
            for (int x = 0; x < sizePx; x++) {
                for (int y = 0; y < sizePx; y++) {
                    bitmap.setPixel(x, y, matrix.get(x, y) ? Color.BLACK : Color.WHITE);
                }
            }
            return bitmap;
        } catch (Exception ignored) {
            return null;
        }
    }
}