function sortJson(value: unknown): unknown {
  if (Array.isArray(value)) {
    return value.map(sortJson);
  }

  if (value && typeof value === 'object') {
    return Object.fromEntries(
      Object.entries(value)
        .sort(([left], [right]) => left.localeCompare(right))
        .map(([key, child]) => [key, sortJson(child)]),
    );
  }

  return value;
}

export function serializeOpenApiDocument(document: unknown) {
  return `${JSON.stringify(sortJson(document), null, 2)}\n`;
}