export function prettyObject(msg: any) {
  const obj = msg;
  if (typeof msg !== 'string') {
    msg = JSON.stringify(msg, null, '  ');
  }
  if (msg === '{}') {
    return obj.toString();
  }
  if (msg.startsWith('```json')) {
    return msg;
  }
  return ['```json', msg, '```'].join('\n');
}

export function* chunks(s: string, maxBytes = 1000 * 1000) {
  const decoder = new TextDecoder('utf-8');
  let buf = new TextEncoder().encode(s);
  while (buf.length) {
    let i = buf.lastIndexOf(32, maxBytes + 1);
    // If no space found, try forward search
    if (i < 0)
    { i = buf.indexOf(32, maxBytes); }
    // If there's no space at all, take all
    if (i < 0)
    { i = buf.length; }
    // This is a safe cut-off point; never half-way a multi-byte
    yield decoder.decode(buf.slice(0, i));
    buf = buf.slice(i + 1); // Skip space (if any)
  }
}