import { defaultInstanceIdForDriver, ProviderDriverKind, type ThreadId } from "@t3tools/contracts";import * as DateTime from "effect/DateTime";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 ProviderSessionRuntime from "../../persistence/ProviderSessionRuntime.ts";import { ProviderSessionDirectoryPersistenceError, ProviderValidationError } from "../Errors.ts";import {  ProviderSessionDirectory,  type ProviderRuntimeBinding,  type ProviderRuntimeBindingWithMetadata,  type ProviderSessionDirectoryShape,} from "../Services/ProviderSessionDirectory.ts";const decodeProviderDriverKindValue = Schema.decodeUnknownEffect(ProviderDriverKind); function toPersistenceError(operation: string) {  return (cause: unknown) =>    new ProviderSessionDirectoryPersistenceError({      operation,      detail: `Failed to execute ${operation}.`,      cause,    });} function decodeProviderDriverKind(  providerName: string,  operation: string,): Effect.Effect<ProviderDriverKind, ProviderSessionDirectoryPersistenceError> {  return decodeProviderDriverKindValue(providerName).pipe(    Effect.mapError(      (cause) =>        new ProviderSessionDirectoryPersistenceError({          operation,          detail: `Unknown persisted provider '${providerName}'.`,          cause,        }),    ),  );} function isRecord(value: unknown): value is Record<string, unknown> {  return value !== null && typeof value === "object" && !Array.isArray(value);} function mergeRuntimePayload(  existing: unknown | null,  next: unknown | null | undefined,): unknown | null {  if (next === undefined) {    return existing ?? null;  }  if (isRecord(existing) && isRecord(next)) {    return { ...existing, ...next };  }  return next;} function toRuntimeBinding(  runtime: ProviderSessionRuntime.ProviderSessionRuntime,  operation: string,): Effect.Effect<ProviderRuntimeBindingWithMetadata, ProviderSessionDirectoryPersistenceError> {  return decodeProviderDriverKind(runtime.providerName, operation).pipe(    Effect.map(      (provider) =>        ({          threadId: runtime.threadId,          provider,          // Migration boundary only: rows written before the instance split          // have a null provider_instance_id. Promote them as they leave          // persistence so hot routing code never has to infer an instance          // from a driver kind.          providerInstanceId: runtime.providerInstanceId ?? defaultInstanceIdForDriver(provider),          adapterKey: runtime.adapterKey,          runtimeMode: runtime.runtimeMode,          status: runtime.status,          resumeCursor: runtime.resumeCursor,          runtimePayload: runtime.runtimePayload,          lastSeenAt: runtime.lastSeenAt,        }) satisfies ProviderRuntimeBindingWithMetadata,    ),  );} const makeProviderSessionDirectory = Effect.gen(function* () {  const repository = yield* ProviderSessionRuntime.ProviderSessionRuntimeRepository;   const getBinding = (threadId: ThreadId) =>    repository.getByThreadId({ threadId }).pipe(      Effect.mapError(toPersistenceError("ProviderSessionDirectory.getBinding:getByThreadId")),      Effect.flatMap((runtime) =>        Option.match(runtime, {          onNone: () => Effect.succeed(Option.none<ProviderRuntimeBinding>()),          onSome: (value) =>            toRuntimeBinding(value, "ProviderSessionDirectory.getBinding").pipe(              Effect.map((binding) => Option.some(binding)),            ),        }),      ),    );   const upsert: ProviderSessionDirectoryShape["upsert"] = Effect.fn(function* (binding, options) {    const existing = yield* repository      .getByThreadId({ threadId: binding.threadId })      .pipe(Effect.mapError(toPersistenceError("ProviderSessionDirectory.upsert:getByThreadId")));     const existingRuntime = Option.getOrUndefined(existing);    const resolvedThreadId = binding.threadId ?? existingRuntime?.threadId;    if (!resolvedThreadId) {      return yield* new ProviderValidationError({        operation: "ProviderSessionDirectory.upsert",        issue: "threadId must be a non-empty string.",      });    }     const now = DateTime.formatIso(yield* DateTime.now);    const providerChanged =      existingRuntime !== undefined && existingRuntime.providerName !== binding.provider;    const providerInstanceId =      binding.providerInstanceId ?? (!providerChanged ? existingRuntime?.providerInstanceId : null);    if (providerInstanceId === null || providerInstanceId === undefined) {      return yield* new ProviderValidationError({        operation: "ProviderSessionDirectory.upsert",        issue: "providerInstanceId is required for provider session runtime bindings.",      });    }    yield* repository      .upsert(        {          threadId: resolvedThreadId,          providerName: binding.provider,          providerInstanceId,          adapterKey:            binding.adapterKey ??            (providerChanged              ? binding.provider              : (existingRuntime?.adapterKey ?? binding.provider)),          runtimeMode: binding.runtimeMode ?? existingRuntime?.runtimeMode ?? "full-access",          status: binding.status ?? existingRuntime?.status ?? "running",          lastSeenAt: now,          resumeCursor:            binding.resumeCursor !== undefined              ? binding.resumeCursor              : (existingRuntime?.resumeCursor ?? null),          runtimePayload: mergeRuntimePayload(            existingRuntime?.runtimePayload ?? null,            binding.runtimePayload,          ),        },        options,      )      .pipe(Effect.mapError(toPersistenceError("ProviderSessionDirectory.upsert:upsert")));  });   const getProvider: ProviderSessionDirectoryShape["getProvider"] = (threadId) =>    getBinding(threadId).pipe(      Effect.flatMap((binding) =>        Option.match(binding, {          onSome: (value) => Effect.succeed(value.provider),          onNone: () =>            Effect.fail(              new ProviderSessionDirectoryPersistenceError({                operation: "ProviderSessionDirectory.getProvider",                detail: `No persisted provider binding found for thread '${threadId}'.`,              }),            ),        }),      ),    );   const recordImportedTranscript: ProviderSessionDirectoryShape["recordImportedTranscript"] = (    input,  ) =>    repository      .recordImportedTranscript(input)      .pipe(        Effect.mapError(toPersistenceError("ProviderSessionDirectory.recordImportedTranscript")),      );   const listThreadIds: ProviderSessionDirectoryShape["listThreadIds"] = () =>    repository.list().pipe(      Effect.mapError(toPersistenceError("ProviderSessionDirectory.listThreadIds:list")),      Effect.map((rows) => rows.map((row) => row.threadId)),    );   const listBindings: ProviderSessionDirectoryShape["listBindings"] = () =>    repository.list().pipe(      Effect.mapError(toPersistenceError("ProviderSessionDirectory.listBindings:list")),      Effect.flatMap((rows) =>        Effect.forEach(          rows,          (row) => toRuntimeBinding(row, "ProviderSessionDirectory.listBindings"),          { concurrency: "unbounded" },        ),      ),    );   return {    upsert,    recordImportedTranscript,    getProvider,    getBinding,    listThreadIds,    listBindings,  } satisfies ProviderSessionDirectoryShape;}); export const ProviderSessionDirectoryLive = Layer.effect(  ProviderSessionDirectory,  makeProviderSessionDirectory,);