import QRCode from "qrcode-terminal/vendor/QRCode";
import QRErrorCorrectLevel from "qrcode-terminal/vendor/QRCode/QRErrorCorrectLevel";

const getErrorLevel = (level) => {
  if (typeof level === "number") {
    return level;
  }

  const normalized = String(level || "M").toUpperCase();
  return QRErrorCorrectLevel?.[normalized] ?? QRErrorCorrectLevel.M;
};

export const generateQrMatrix = ({
  value,
  errorCorrectionLevel = "M",
}) => {
  if (!value) {
    throw new Error("generateQrMatrix requires a value");
  }

  const qr = new QRCode(-1, getErrorLevel(errorCorrectionLevel));
  qr.addData(value);
  qr.make();

  const size = qr.getModuleCount();
  const matrix = new Array(size);

  for (let row = 0; row < size; row += 1) {
    matrix[row] = new Array(size);
    for (let col = 0; col < size; col += 1) {
      matrix[row][col] = qr.isDark(row, col);
    }
  }

  return { matrix, size };
};