import { ServerSettings, type ServerSettingsPatch } from "@t3tools/contracts";import { Schema } from "effect";import { deepMerge } from "./Struct.ts";import { fromLenientJson } from "./schemaJson.ts";import { createModelSelection } from "./model.ts"; const ServerSettingsJson = fromLenientJson(ServerSettings); 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 {  try {    const decoded = Schema.decodeUnknownSync(ServerSettingsJson)(raw);    return extractPersistedServerObservabilitySettings(decoded);  } catch {    return { otlpTracesUrl: undefined, otlpMetricsUrl: undefined };  }} function shouldReplaceTextGenerationModelSelection(  patch: ServerSettingsPatch["textGenerationModelSelection"] | undefined,): boolean {  return Boolean(patch && (patch.provider !== 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 next = deepMerge(current, patch);  if (!selectionPatch) {    return next;  }   const provider = selectionPatch.provider ?? current.textGenerationModelSelection.provider;  const model = selectionPatch.model ?? current.textGenerationModelSelection.model;  const options = shouldReplaceTextGenerationModelSelection(selectionPatch)    ? selectionPatch.options    : mergeModelSelectionOptionsById({        current: current.textGenerationModelSelection.options,        patch: selectionPatch.options,      });   return {    ...next,    textGenerationModelSelection: createModelSelection(provider, model, options),  };}