import type { ServerLifecycleStreamEvent } from "@t3tools/contracts";import * as Effect from "effect/Effect";import * as Layer from "effect/Layer";import * as PubSub from "effect/PubSub";import * as Ref from "effect/Ref";import * as Context from "effect/Context";import * as Stream from "effect/Stream"; type LifecycleEventInput =  | Omit<Extract<ServerLifecycleStreamEvent, { type: "welcome" }>, "sequence">  | Omit<Extract<ServerLifecycleStreamEvent, { type: "ready" }>, "sequence">; interface SnapshotState {  readonly sequence: number;  readonly events: ReadonlyArray<ServerLifecycleStreamEvent>;} export interface ServerLifecycleEventsShape {  readonly publish: (event: LifecycleEventInput) => Effect.Effect<ServerLifecycleStreamEvent>;  readonly snapshot: Effect.Effect<SnapshotState>;  readonly stream: Stream.Stream<ServerLifecycleStreamEvent>;} export class ServerLifecycleEvents extends Context.Service<  ServerLifecycleEvents,  ServerLifecycleEventsShape>()("t3/serverLifecycleEvents") {} export const ServerLifecycleEventsLive = Layer.effect(  ServerLifecycleEvents,  Effect.gen(function* () {    const pubsub = yield* PubSub.unbounded<ServerLifecycleStreamEvent>();    const state = yield* Ref.make<SnapshotState>({      sequence: 0,      events: [],    });     return {      publish: (event) =>        Ref.modify(state, (current) => {          const nextSequence = current.sequence + 1;          const nextEvent = {            ...event,            sequence: nextSequence,          } satisfies ServerLifecycleStreamEvent;          const nextEvents =            nextEvent.type === "welcome"              ? [nextEvent, ...current.events.filter((entry) => entry.type !== "welcome")]              : [nextEvent, ...current.events.filter((entry) => entry.type !== "ready")];          return [nextEvent, { sequence: nextSequence, events: nextEvents }] as const;        }).pipe(Effect.tap((event) => PubSub.publish(pubsub, event))),      snapshot: Ref.get(state),      get stream() {        return Stream.fromPubSub(pubsub);      },    } satisfies ServerLifecycleEventsShape;  }),);