export function unix<
  Self,
  S extends Hyperlink.Spec,
  HSelf,
  R = never,
>(
  tag: Hyperlink.NodeBoundTag<Self, S, HSelf>,
  impl:
    | Hyperlink.ImplOf<S>
    | Hyperlink.BuiltHyperlink<S, R>
    | Effect.Effect<
        Hyperlink.ImplOf<S> | Hyperlink.BuiltHyperlink<S, R>,
        never,
        R
      >,
  options?: NamelessListenOptions,
): Layer.Layer<Self | Hyperlink.Local<Self> | ListenNode, never, R>;
export function unix<Serve extends Layer.Layer<never, never, never>>(
  serve: Serve,
  options?: NamelessListenOptions,
): Layer.Layer<
  Layer.Success<Serve> | ListenNode,
  never,
  Layer.Services<Serve>
>;
export function unix<Serves extends ServeLayerList>(
  serves: Serves,
  options?: NamelessListenOptions,
): Layer.Layer<
  Layer.Success<Serves[number]> | ListenNode,
  never,
  Layer.Services<Serves[number]>
>;
export function unix<
  Node extends AnyNode & { readonly [catalogSym]?: unknown },
  Serves extends ServeLayerList,
>(
  node: Node,
  serves: Serves & ServesForCatalog<CatalogROut<Node>, Serves>,
  options?: NamelessListenOptions,
): Layer.Layer<
  Layer.Success<Serves[number]> | ListenNode,
  never,
  Layer.Services<Serves[number]>
>;
export function unix(
  nodeOrServesOrTag:
    | AnyNode
    | Layer.Layer<never, never, never>
    | ServeLayerList
    | Hyperlink.PipeableTag,
  servesOrOptionsOrImpl?:
    | Layer.Layer<never, never, never>
    | ServeLayerList
    | NamelessListenOptions
    | object,
  options?: NamelessListenOptions,
): Layer.Layer<
  never,
  | UnaddressedNode
  | AddressLessClaimLost
  | ListenTagNodeRequired
  | UnixListenRequiresIpc, any> {
  const listenOptions = (
    isServeArg(nodeOrServesOrTag) ? servesOrOptionsOrImpl : options
  ) as NamelessListenOptions | undefined;
  // Lookup is not baked in — pipe `Layer.provide(Lookup.layer)` (default) or
  // `Lookup.layerOptions({ path })` / `Lookup.client` when claim / advertise needs it.

  if (isServeArg(nodeOrServesOrTag)) {
    const list = (
      Array.isArray(nodeOrServesOrTag)
        ? nodeOrServesOrTag
        : [nodeOrServesOrTag]
    ) as ServeLayerList;
    return ipcNameless(list, listenOptions) as Layer.Layer<
      never,
      | UnaddressedNode
      | AddressLessClaimLost
      | ListenTagNodeRequired
      | UnixListenRequiresIpc, never>;
  }

  if (isHyperlinkTagArg(nodeOrServesOrTag)) {
    const tag = nodeOrServesOrTag;
    const tagKey = (() => {
      const key = (tag as unknown as { readonly key?: unknown }).key;
      return typeof key === "string" ? key : "unknown";
    })();
    const bound = Hyperlink.nodeOf(tag);
    const fleet = Hyperlink.nodesOf(
      tag as unknown as Hyperlink.HyperlinkTag<unknown, Hyperlink.Spec>,
    );
    if (bound === undefined) {
      return failListenTagNode({
        tag: tagKey,
        reason: fleet.length > 1 ? "ambiguous" : "missing",
        count: fleet.length,
      }) as Layer.Layer<
        never,
        | UnaddressedNode
        | AddressLessClaimLost
        | ListenTagNodeRequired
        | UnixListenRequiresIpc, never>;
    }
    if (isNonIpcNode(bound as AnyNode)) {
      const n = bound as AnyNode;
      return unixRequiresIpcLayer(
        n.key,
        n.kind ?? (typeof n.url === "string" ? "url" : "unknown"),
      ) as Layer.Layer<
        never,
        | UnaddressedNode
        | AddressLessClaimLost
        | ListenTagNodeRequired
        | UnixListenRequiresIpc, never>;
    }
    const serveErased = Hyperlink.serve as unknown as (
      tag: Hyperlink.PipeableTag,
      impl: unknown,
    ) => Layer.Layer<never, never, never>;
    return ipcListenOn(
      bound as AnyNode,
      [serveErased(tag, servesOrOptionsOrImpl)] as ServeLayerList,
      listenOptions,
    ) as Layer.Layer<
      never,
      | UnaddressedNode
      | AddressLessClaimLost
      | ListenTagNodeRequired
      | UnixListenRequiresIpc, never>;
  }

  const node = nodeOrServesOrTag as AnyNode;
  if (isNonIpcNode(node)) {
    return unixRequiresIpcLayer(
      node.key,
      node.kind ?? (typeof node.url === "string" ? "url" : "unknown"),
    ) as Layer.Layer<
      never,
      | UnaddressedNode
      | AddressLessClaimLost
      | ListenTagNodeRequired
      | UnixListenRequiresIpc, never>;
  }

  const serves = servesOrOptionsOrImpl as
    | Layer.Layer<never, never, never>
    | ServeLayerList;
  const list = (Array.isArray(serves) ? serves : [serves]) as ServeLayerList;
  return ipcListenOn(node, list, listenOptions) as Layer.Layer<
    never,
    | UnaddressedNode
    | AddressLessClaimLost
    | ListenTagNodeRequired
    | UnixListenRequiresIpc, never>;
}