```ts
/**
 * Splits one line of CSV into its fields on commas.
 *
 * A field wrapped in double quotes may contain commas, and a doubled quote inside such a field means one literal quote character;
 * the surrounding quotes are not part of the value. Fields that are not quoted are taken literally, including any surrounding spaces.
 * An empty line is one empty field.
 *
 * @param {string} line - The CSV line to parse
 * @returns {string[]} The parsed fields
 */
export function parseCsvLine(line: string): string[] {
  const result: string[] = [];
  let currentField = '';
  let inQuote = false;
  for (const char of line) {
    if (char === '"') {
      inQuote = !inQuote;
    } else if (!inQuote && char === ',') {
      if (currentField !== '') {
        result.push(currentField);
        currentField = '';
      }
    } else if (!inQuote) {
      currentField += char;
    } else {
      throw new Error('Unbalanced quote in CSV line');
    }
  }
  if (currentField !== '') {
    result.push(currentField);
  }
  return result;
}
```