export const cosineSimilarity = (
  vecA: number[],
  vecB: number[],
  precision: number = 6,
): number => {
  // Check if both vectors have the same length
  if (vecA.length !== vecB.length) {
    throw new Error('Vectors must have the same length');
  }

  // Compute dot product and magnitudes
  const dotProduct = vecA.reduce((sum, a, i) => {
    const b = vecB[i]; // Extract value safely
    return sum + a * (b !== undefined ? b : 0); // Check for undefined
  }, 0);
  const magnitudeA = Math.sqrt(vecA.reduce((sum, a) => sum + a * a, 0));
  const magnitudeB = Math.sqrt(vecB.reduce((sum, b) => sum + b * b, 0));

  // Check if either magnitude is zero
  if (magnitudeA === 0 || magnitudeB === 0) {
    return 0;
  }

  // Calculate cosine similarity and round to specified precision
  return parseFloat(
    (dotProduct / (magnitudeA * magnitudeB)).toFixed(precision),
  );
};