import { ServerSettings, type ServerSettingsPatch } from "@t3tools/contracts";import * as Option from "effect/Option";import * as Schema from "effect/Schema";import { deepMerge } from "./Struct.ts";import { fromLenientJson } from "./schemaJson.ts";import { createModelSelection } from "./model.ts"; const ServerSettingsJson = fromLenientJson(ServerSettings);const decodeServerSettingsJson = Schema.decodeUnknownOption(ServerSettingsJson); export interface PersistedServerObservabilitySettings {  readonly otlpTracesUrl: string | undefined;  readonly otlpMetricsUrl: string | undefined;} export function normalizePersistedServerSettingString(  value: string | null | undefined,): string | undefined {  const trimmed = value?.trim();  return trimmed && trimmed.length > 0 ? trimmed : undefined;} export function extractPersistedServerObservabilitySettings(input: {  readonly observability?: {    readonly otlpTracesUrl?: string;    readonly otlpMetricsUrl?: string;  };}): PersistedServerObservabilitySettings {  return {    otlpTracesUrl: normalizePersistedServerSettingString(input.observability?.otlpTracesUrl),    otlpMetricsUrl: normalizePersistedServerSettingString(input.observability?.otlpMetricsUrl),  };} export function parsePersistedServerObservabilitySettings(  raw: string,): PersistedServerObservabilitySettings {  const decoded = decodeServerSettingsJson(raw);  if (Option.isSome(decoded)) {    return extractPersistedServerObservabilitySettings(decoded.value);  }  return { otlpTracesUrl: undefined, otlpMetricsUrl: undefined };} function shouldReplaceTextGenerationModelSelection(  patch: ServerSettingsPatch["textGenerationModelSelection"] | undefined,): boolean {  return Boolean(patch && (patch.instanceId !== undefined || patch.model !== undefined));} function mergeModelSelectionOptionsById(input: {  current: ReadonlyArray<{ readonly id: string; readonly value: string | boolean }> | undefined;  patch: ReadonlyArray<{ readonly id: string; readonly value: string | boolean }> | undefined;}): Array<{ id: string; value: string | boolean }> | undefined {  if (input.patch === undefined) {    return input.current ? [...input.current] : undefined;  }  if (input.patch.length === 0) {    return undefined;  }   const merged = new Map((input.current ?? []).map((selection) => [selection.id, selection.value]));  for (const selection of input.patch) {    merged.set(selection.id, selection.value);  }  return [...merged.entries()].map(([id, value]) => ({ id, value }));} /** * Applies a server settings patch while treating textGenerationModelSelection as * replace-on-provider/model updates. This prevents stale nested options from * surviving a reset patch that intentionally omits options. */export function applyServerSettingsPatch(  current: ServerSettings,  patch: ServerSettingsPatch,): ServerSettings {  const selectionPatch = patch.textGenerationModelSelection;  const { automaticGitFetchInterval, ...patchForMerge } = patch;  const next = deepMerge(current, patchForMerge);  const nextWithReplacements = {    ...next,    ...(patch.providerInstances !== undefined      ? { providerInstances: patch.providerInstances }      : {}),    ...(automaticGitFetchInterval !== undefined ? { automaticGitFetchInterval } : {}),  };  if (!selectionPatch) {    return nextWithReplacements;  }   const instanceId = selectionPatch.instanceId ?? current.textGenerationModelSelection.instanceId;  const model = selectionPatch.model ?? current.textGenerationModelSelection.model;  const options = shouldReplaceTextGenerationModelSelection(selectionPatch)    ? selectionPatch.options    : mergeModelSelectionOptionsById({        current: current.textGenerationModelSelection.options,        patch: selectionPatch.options,      });   return {    ...nextWithReplacements,    textGenerationModelSelection: createModelSelection(instanceId, model, options),  };}