// 1. Offline Tesseract Worker Setup
async function runOfflineOCR(imageSource) {
  const worker = await Tesseract.createWorker('eng', 1, {
    workerPath: './worker.min.js',
    corePath: './tesseract-core-simd.wasm.js',
    langPath: './', // Looks for ./eng.traineddata.gz locally
    cacheMethod: 'none'
  });

  const { data: { text } } = await worker.recognize(imageSource);
  await worker.terminate();
  return text;
}

// 2. South African Retail Margin & VAT (15%) Sell Price Calculator
// Calculates retail shelf price in ZAR (R) from excl. or incl. supplier cost
function calculateSellPrice(costPrice, marginPercent, costIncludesVat = false) {
  const vatRate = 1.15;
  const baseCost = costIncludesVat ? costPrice / vatRate : costPrice;
  const sellExclVat = baseCost * (1 + marginPercent / 100);
  const sellInclVat = sellExclVat * vatRate;
  return {
    sellExcl: Number(sellExclVat.toFixed(2)),
    sellIncl: Number(sellInclVat.toFixed(2)),
    profitRand: Number((sellExclVat - baseCost).toFixed(2))
  };
}