import type {  ResourceTelemetryProcessCategory,  ServerProcessDiagnosticsEntry,  ServerProcessDiagnosticsResult,  ServerProcessSignal,  ServerSignalProcessResult,} from "@t3tools/contracts";import * as Context from "effect/Context";import * as Effect from "effect/Effect";import * as Layer from "effect/Layer";import * as Option from "effect/Option";import * as Schema from "effect/Schema"; import * as ResourceTelemetry from "../resourceTelemetry/ResourceTelemetry.ts"; export interface ProcessDiagnosticsShape {  readonly read: Effect.Effect<ServerProcessDiagnosticsResult>;  readonly signal: (input: {    readonly pid: number;    readonly startTimeMs: number;    readonly signal: ServerProcessSignal;  }) => Effect.Effect<ServerSignalProcessResult>;} export class ProcessDiagnostics extends Context.Service<  ProcessDiagnostics,  ProcessDiagnosticsShape>()("t3/diagnostics/ProcessDiagnostics") {} export class ProcessIdentityChanged extends Schema.TaggedErrorClass<ProcessIdentityChanged>()(  "ProcessIdentityChanged",  {    pid: Schema.Number,    startTimeMs: Schema.Number,  },) {  override get message(): string {    return `Process ${this.pid} no longer matches start time ${this.startTimeMs}.`;  }} export class ProcessSignalFailed extends Schema.TaggedErrorClass<ProcessSignalFailed>()(  "ProcessSignalFailed",  {    pid: Schema.Number,    signal: Schema.String,    cause: Schema.Defect(),  },) {  override get message(): string {    return `Failed to signal process ${this.pid} with ${this.signal}.`;  }} export type ProcessDiagnosticsError = ProcessIdentityChanged | ProcessSignalFailed; function formatElapsed(runTimeMs: number): string {  const totalSeconds = Math.max(0, Math.floor(runTimeMs / 1_000));  const hours = Math.floor(totalSeconds / 3_600);  const minutes = Math.floor((totalSeconds % 3_600) / 60);  const seconds = totalSeconds % 60;  return hours > 0    ? `${hours}:${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`    : `${minutes}:${String(seconds).padStart(2, "0")}`;} function canSignalCategory(category: ResourceTelemetryProcessCategory): boolean {  return (    category === "server-child" || category === "provider-root" || category === "terminal-root"  );} export const make = Effect.fn("makeProcessDiagnostics")(function* () {  const telemetry = yield* ResourceTelemetry.ResourceTelemetry;  const read: ProcessDiagnosticsShape["read"] = telemetry.refresh.pipe(    Effect.catch(() => telemetry.latest),    Effect.map((snapshot) => {      const processes = snapshot.processes        .filter((entry) => entry.identity.pid !== process.pid)        .map(          (entry): ServerProcessDiagnosticsEntry => ({            pid: entry.identity.pid,            startTimeMs: entry.identity.startTimeMs,            ppid: entry.ppid,            pgid: Option.none(),            status: entry.status || "Unknown",            cpuPercent: entry.cpuPercent,            rssBytes: entry.residentBytes,            elapsed: formatElapsed(entry.runTimeMs),            command: entry.command || entry.name || "unknown",            depth: Math.max(0, entry.depth - 1),            childPids: entry.childPids,          }),        );      return {        serverPid: process.pid,        readAt: snapshot.readAt,        processCount: processes.length,        totalRssBytes: processes.reduce((total, entry) => total + entry.rssBytes, 0),        totalCpuPercent: processes.reduce((total, entry) => total + entry.cpuPercent, 0),        processes,        error: Option.map(snapshot.health.native.lastError, (message) => ({ message })),      };    }),  );   const signal: ProcessDiagnosticsShape["signal"] = Effect.fn("ProcessDiagnostics.signal")(    function* (input) {      if (input.pid === process.pid) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some("Refusing to signal the T3 server process."),        };      }      const current = yield* telemetry.latest;      const selected = current.processes.find(        (entry) =>          entry.identity.pid === input.pid && entry.identity.startTimeMs === input.startTimeMs,      );      if (!selected) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some(            `Process ${input.pid} no longer matches the selected process identity.`,          ),        };      }      if (!canSignalCategory(selected.category)) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some(`Process ${input.pid} is not a signalable T3 backend descendant.`),        };      }      return yield* telemetry        .validateProcessIdentity({          pid: input.pid,          startTimeMs: input.startTimeMs,        })        .pipe(          Effect.flatMap((valid) =>            valid              ? Effect.void              : Effect.fail(                  new ProcessIdentityChanged({                    pid: input.pid,                    startTimeMs: input.startTimeMs,                  }),                ),          ),          Effect.flatMap(() =>            Effect.try({              try: () => {                process.kill(input.pid, input.signal);                return {                  pid: input.pid,                  signal: input.signal,                  signaled: true,                  message: Option.none(),                };              },              catch: (cause) =>                new ProcessSignalFailed({                  pid: input.pid,                  signal: input.signal,                  cause,                }),            }),          ),          Effect.catch((error) =>            Effect.succeed({              pid: input.pid,              signal: input.signal,              signaled: false,              message: Option.some(                error instanceof Error ? error.message : "Failed to signal process.",              ),            }),          ),        );    },  );   return ProcessDiagnostics.of({ read, signal });}); export const layer = Layer.effect(ProcessDiagnostics, make());