// AbortSignal.timeout() is currently baseline 2024
export const timeoutSignal = (milliseconds: number) => {
  const abortController = new AbortController()
  setTimeout(() => {
    const message = 'signal timed out'
    const name = 'TimeoutError'
    abortController.abort(
      // some environments (React Native, Node) don't have DOMException
      typeof DOMException !== 'undefined'
        ? new DOMException(message, name)
        : Object.assign(new Error(message), { name }),
    )
  }, milliseconds)
  return abortController.signal
}

// AbortSignal.any() is currently baseline 2024
export const anySignal = (...signals: AbortSignal[]) => {
  // if any are already aborted, return an already aborted signal
  for (const signal of signals)
    if (signal.aborted) return AbortSignal.abort(signal.reason)

  // otherwise, create a new signal that aborts when any of the given signals abort
  const abortController = new AbortController()
  for (const signal of signals) {
    signal.addEventListener(
      'abort',
      () => abortController.abort(signal.reason),
      { signal: abortController.signal, once: true },
    )
  }
  return abortController.signal
}