/**
 * Deterministic A/B/C/D and stop handler.
 *
 * Clicks never start a language-model turn. The server validates the open
 * question, writes the probe answer, updates posteriors, closes the focus and
 * returns a fallback narration in one receipt.
 */

import { posteriorMap, scoreDeltas } from "../core/decision-fingerprint";
import { nextProbe } from "../core/build-state";
import { RECTIFICATION_TERMINATION_COPY, isNonConvergingRangeOffer, nonConvergingRangeNarration, publicCanAdopt, publicNextAction } from "../core/rectification-decision.ts";
import {
  deliveryAdoptNarration,
  openingRangeFromCandidateRange,
  RECTIFICATION_USER_COPY,
} from "../user-copy.ts";
import {
  applyChoiceWithoutEvidence,
  previousInferenceFromReceipt,
  withNakshatraBoundaryProbe,
} from "./inference-adapter";
import { decideAfterInferenceChange, decideFromDossier, rectificationFollowupCatalog } from "./decision-from-dossier";
import type { AnswerClass, InferenceState } from "../core/types.ts";
import {
  CHOICE_ACTION,
  STOP_ACTION,
  composeChoiceNarration,
  focusStatusForAnswer,
  outcomeIdForOption,
  shouldContinueAfterStructuredChoice,
  structuredProbeContext,
  type ChoiceOptionId,
} from "./choice-action";
import {
  evidenceLedgerFingerprint,
  inferenceFingerprintForState,
  loadV9CaseCompute,
  loadV9CaseDossier,
  persistV9ChoiceAction,
  persistV9DeterministicTurn,
  resolveV10ConversationFocus,
  RectificationToolServiceError,
  safeToolErrorCode,
  type AccountingClient,
  type ConversationFocus,
  type PersistChoiceActionInput,
  type V9CaseDossier,
} from "./tool-service";
import { isPersistedFocusId, type ChoiceKey } from "./choice-card";
import { persistServerOwnedFocus, openQuestionFromPersistedFocus, isRenderableChoiceOpenQuestion, linkFocusAskedTurn } from "./server-focus";
import {
  blockingMethodsCovered,
  buildMethodFollowupPlan,
  exhaustionSpokenCollectFollowup,
  GENERIC_COLLECT_QUESTION,
  spokenCollectFallbackFollowup,
  spokenFollowupForUser,
  type MethodCoverage,
  type MethodFollowup,
  type MethodFollowupPlan,
} from "./method-followup";
import type { SessionOutcomeKind } from "./confirmation-gate";
import { prospectiveWindowsNarration, refinementFromDecisionReceipt } from "./refinement-packet";
import { projectCurrentQuestion } from "./turn-decision";

function withProspectiveWindows(
  base: string,
  receipt: Readonly<Record<string, unknown>> | null | undefined,
): string {
  const extra = prospectiveWindowsNarration(
    refinementFromDecisionReceipt(receipt).prospective_probes,
  );
  return extra ? `${base} ${extra}` : base;
}

function openingRangeFromDossier(dossier: {
  case?: {
    acceptedTime?: string | null;
    status?: string;
    candidateRange?: { start_time?: string; end_time?: string } | null;
  } | null;
}): readonly [string, string] | null {
  return openingRangeFromCandidateRange(dossier.case?.candidateRange ?? null);
}

function interviewToPersist(plan: MethodFollowupPlan): MethodFollowup | null {
  return plan.next_followup ?? plan.deferred_followup ?? null;
}

function isRemainingDiscriminatorFollowup(followup: MethodFollowup | null): boolean {
  if (!followup) return false;
  return followup.source === "event_probe"
    || followup.source === "varga_observation"
    || followup.source === "precision_stage"
    || followup.source === "nakshatra_boundary"
    || followup.intent === "distinguish_candidates";
}

function shouldSkipFollowupPersist(input: {
  canAdopt: boolean;
  nextAction: string;
  followup: MethodFollowup | null;
  methods?: readonly MethodCoverage[];
}): boolean {
  if (!input.canAdopt) return false;
  if (
    input.nextAction === "ask_fact_collection"
    || input.nextAction === "ask_candidate_discriminator"
    || input.nextAction === "ask_holdout_validation"
  ) {
    return false;
  }
  if (input.methods && !blockingMethodsCovered(input.methods)) return false;
  if (isRemainingDiscriminatorFollowup(input.followup)) return false;
  return true;
}

function adoptHostNarration(input: {
  credibleRange?: readonly [string, string] | null;
  representativeTime?: string | null;
  openingRange: readonly [string, string] | null;
  receipt: Readonly<Record<string, unknown>> | null | undefined;
}): string {
  return withProspectiveWindows(deliveryAdoptNarration({
    credibleRange: input.credibleRange,
    representativeTime: input.representativeTime,
    openingRange: input.openingRange,
    stopReason: typeof input.receipt?.stopReason === "string" ? input.receipt.stopReason : null,
  }), input.receipt);
}

export type ApplyChoiceCommand = Readonly<{
  userId: string;
  caseId: string;
  sessionId: string;
  actionId: string;
  action: typeof CHOICE_ACTION | typeof STOP_ACTION;
  focusId: string;
  questionId?: string;
  probeId?: string | null;
  optionId: ChoiceOptionId;
  expectedRevision: number;
  userDisplay?: string | null;
  deferFollowup?: boolean;
}>;

export type AppliedChoiceReceipt = Readonly<{
  applied: true;
  idempotent: boolean;
  status: "applied" | "narrated";
  narrationPersisted: boolean;
  focusId: string;
  questionId: string;
  optionId: ChoiceOptionId;
  probeId: string | null;
  revision: number;
  answerClass: string | null;
  sourceQuote: string | null;
  derivedContext: PersistChoiceActionInput["derivedContext"];
  narration: string;
  userDisplay: string | null;
  nextAction: ReturnType<typeof publicNextAction>;
  nextInterviewPersisted: boolean;
  nextChoiceReady: boolean;
}>;

function asText(value: unknown): string | null {
  return typeof value === "string" && value.trim() ? value.trim() : null;
}

function dossierWithClosedFocus<T extends {
  conversationSummary: {
    activeFocus: { targetDomain?: string | null } | null;
    declinedSkippedTopics: readonly Readonly<Record<string, unknown>>[];
  };
}>(dossier: T, status: "resolved" | "declined" | "skipped"): T {
  const domain = dossier.conversationSummary.activeFocus?.targetDomain ?? null;
  const declinedSkippedTopics = (
    (status === "declined" || status === "skipped") && domain
      ? [
        ...dossier.conversationSummary.declinedSkippedTopics,
        { target_domain: domain, status },
      ]
      : dossier.conversationSummary.declinedSkippedTopics
  );
  return {
    ...dossier,
    conversationSummary: {
      ...dossier.conversationSummary,
      activeFocus: null,
      declinedSkippedTopics,
    },
  };
}

export async function applyRectificationChoice(
  accounting: AccountingClient,
  command: ApplyChoiceCommand,
): Promise<AppliedChoiceReceipt> {
  const dossier = await loadV9CaseDossier(accounting, command.userId, command.caseId);
  if (dossier.case.sessionId !== command.sessionId) {
    throw new RectificationToolServiceError("agentic_rectification_case_session_mismatch");
  }
  const focus = dossier.conversationSummary.activeFocus;
  if (!focus) {
    throw new RectificationToolServiceError("agentic_rectification_focus_not_active");
  }
  if (command.focusId !== focus.id) {
    throw new RectificationToolServiceError("agentic_rectification_stale_question");
  }

  const schema = focus.expectedAnswerSchema;
  const schemaProbeId = asText(schema.probe_id);
  const optionId = command.optionId;
  const questionId = focus.questionId;
  const scoring = schema.scoring !== false && !questionId.endsWith(":holdout");
  const receipt = dossier.latestResult?.decisionReceipt ?? null;
  const previous = withNakshatraBoundaryProbe(
    previousInferenceFromReceipt(receipt),
    refinementFromDecisionReceipt(receipt).nakshatra_boundary,
  );
  const answerClass = optionId === "stop" ? null : outcomeIdForOption(optionId, schema);
  if (optionId !== "stop" && !answerClass) {
    throw new RectificationToolServiceError("agentic_rectification_invalid_choice_schema");
  }

  if (optionId === "stop" || command.action === STOP_ACTION) {
    const narration = composeChoiceNarration({
      optionId: "stop",
      scoring,
      appliedInference: false,
    });
    return persistApplied(accounting, command, {
      focusId: focus.id,
      questionId,
      focusStatus: "skipped",
      probeId: schemaProbeId,
      optionId: "stop",
      scoring,
      appliedInference: false,
      answerClass: null,
      sourceQuote: null,
      year: null,
      expectedRevision: previous?.revision ?? command.expectedRevision,
      inference: null,
      narration,
    userDisplay: "先这样，先看当前范围",
    decisionState: previous,
    userStopped: true,
    dossier,
  });
  }

  if (!previous) {
    const narration = composeChoiceNarration({
      optionId,
      scoring,
      appliedInference: false,
      answerClass,
    });
    return persistApplied(accounting, command, {
      focusId: focus.id,
      questionId,
      focusStatus: focusStatusForAnswer(answerClass, optionId),
      probeId: schemaProbeId ?? command.probeId ?? null,
      optionId,
      scoring,
      appliedInference: false,
      answerClass,
      sourceQuote: optionQuoteFromSchema(schema, optionId),
      year: null,
      expectedRevision: command.expectedRevision,
      inference: null,
      narration,
      userDisplay: command.userDisplay ?? userDisplayFromSchema(schema, optionId),
      dossier,
    });
  }

  const applied = applyChoiceWithoutEvidence(previous, {
    choiceKey: optionId,
    schema,
    questionId,
    domain: focus.targetDomain,
  });
  if (applied.reason === "stale_probe") {
    throw new RectificationToolServiceError("agentic_rectification_stale_probe");
  }
  if (command.expectedRevision !== previous.revision && applied.reason !== "already_answered") {
    throw new RectificationToolServiceError("agentic_rectification_revision_conflict");
  }

  const persistable = applied.applied
    || applied.reason === "already_answered"
    || applied.reason === "superseded"
    || applied.reason === "holdout";
  const probe = applied.probeId
    ? applied.state.probes.find((item) => item.id === applied.probeId)
      ?? previous.probes.find((item) => item.id === applied.probeId)
      ?? nextProbe(previous)
    : null;
  const sourceQuote = optionQuoteFromSchema(schema, optionId);
  const narration = composeChoiceNarration({
    optionId,
    scoring,
    appliedInference: persistable && scoring,
    answerClass,
  });
  const evidenceFp = dossier.latestResult?.evidenceLedgerFingerprint
    ?? evidenceLedgerFingerprint(dossier.evidence);
  const writeInference = persistable && applied.answerClass && (scoring || applied.reason === "holdout")
    && (applied.probeId || applied.reason === "holdout");
  const inference = writeInference
    ? {
      expectedRevision: previous.revision,
      probeId: applied.probeId ?? schemaProbeId ?? "holdout",
      openProbeId: schemaProbeId ?? applied.probeId ?? "holdout",
      semanticKey: probe?.semantic_key ?? "holdout",
      candidateSplitHash: probe?.candidate_split_hash ?? "holdout",
      answerClass: applied.answerClass,
      rawAnswer: optionId,
      inferenceState: applied.state as unknown as Record<string, unknown>,
      posteriorBefore: posteriorMap(previous.candidates),
      posteriorAfter: posteriorMap(applied.state.candidates),
      scoreDeltas: scoreDeltas(
        posteriorMap(previous.candidates),
        posteriorMap(applied.state.candidates),
      ),
      decisionStateFingerprint: inferenceFingerprintForState(
        command.caseId,
        evidenceFp,
        applied.state,
      ),
      reason: applied.reason === "superseded"
        ? "supersede" as const
        : applied.reason === "already_answered"
          ? "already_answered" as const
          : applied.reason === "holdout"
            ? "choice" as const
            : "choice" as const,
      idempotencyKey: `${applied.reason === "superseded" ? "supersede" : applied.reason === "holdout" ? "holdout" : "choice"}:${applied.probeId ?? "holdout"}:${applied.answerClass}`,
      candidateSetId: applied.state.candidate_set_id,
    }
    : null;

  return persistApplied(accounting, command, {
    focusId: focus.id,
    questionId,
    focusStatus: focusStatusForAnswer(applied.answerClass, optionId),
    probeId: applied.probeId ?? schemaProbeId,
    optionId,
    scoring,
    appliedInference: Boolean(inference),
    answerClass: applied.answerClass,
    sourceQuote,
    year: probe?.year ?? null,
    expectedRevision: previous.revision,
    inference,
    narration,
    userDisplay: command.userDisplay ?? userDisplayFromSchema(schema, optionId),
    decisionState: applied.state,
    userStopped: false,
    dossier,
  });
}

export async function persistNextInterviewAfterChoice(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
  dossier: Parameters<typeof decideAfterInferenceChange>[0]["dossier"];
  decisionState: InferenceState | null;
  nextAction: ReturnType<typeof publicNextAction>;
  birthDate?: string | null;
  askedTurnId?: string | null;
}): Promise<{
  hostNarration: string;
  choiceReady: boolean;
  persisted?: boolean;
  focusId?: string | null;
  focus?: ConversationFocus | null;
}> {
  const latest = input.dossier.latestResult
    ? {
      ...input.dossier.latestResult,
      decisionReceipt: {
        ...(input.dossier.latestResult.decisionReceipt ?? {}),
        ...(input.decisionState ? { inference_state: input.decisionState } : {}),
      },
    }
    : {
      decisionReceipt: input.decisionState ? { inference_state: input.decisionState } : null,
    };
  const birthDate = input.birthDate ?? null;
  const catalog = rectificationFollowupCatalog(latest, input.dossier.evidence);
  const sessionOutcome = typeof input.nextAction.session_outcome === "string"
    ? input.nextAction.session_outcome as SessionOutcomeKind
    : "collect_evidence";
  const plan = buildMethodFollowupPlan({
    evidence: input.dossier.evidence,
    activeFocus: null,
    declinedTopics: input.dossier.conversationSummary.declinedSkippedTopics,
    closedCollectFocuses: input.dossier.conversationSummary.declinedSkippedTopics,
    sessionOutcome,
    ...catalog,
    birthDate,
    accepted: Boolean(input.dossier.case.acceptedTime),
    candidatesSeparated: input.nextAction.type !== "ask_candidate_discriminator"
      && input.nextAction.type !== "ask_holdout_validation",
  });
  const followup = interviewToPersist(plan);
  if (shouldSkipFollowupPersist({
    canAdopt: input.nextAction.can_adopt,
    nextAction: input.nextAction.type,
    followup,
    methods: plan.methods,
  })) {
    return {
      hostNarration: adoptHostNarration({
        credibleRange: input.nextAction.credible_range,
        representativeTime: input.nextAction.representative_time,
        openingRange: openingRangeFromDossier(input.dossier),
        receipt: input.dossier.latestResult?.decisionReceipt,
      }),
      choiceReady: false,
      persisted: false,
    };
  }
  const persistedFocus = await persistFocusAfterChoice({
    accounting: input.accounting,
    userId: input.userId,
    caseId: input.caseId,
    decisionReceipt: latest.decisionReceipt,
    followup,
    askedTurnId: input.askedTurnId ?? null,
  });
  const open = openQuestionFromPersistedFocus(persistedFocus);
  if (isRenderableChoiceOpenQuestion(open) && open.prompt) {
    return {
      hostNarration: open.prompt,
      choiceReady: true,
      focusId: persistedFocus.focus?.id ?? null,
      focus: persistedFocus.focus,
    };
  }
  if (open?.kind === "collect_spoken" && open.prompt) {
    return {
      hostNarration: open.prompt,
      choiceReady: false,
      persisted: true,
      focusId: persistedFocus.focus?.id ?? null,
      focus: persistedFocus.focus,
    };
  }
  if (followup?.choice_frame) {
    const spokenFollowup = spokenCollectFallbackFollowup(followup);
    const spoken = spokenFollowupForUser(spokenFollowup) ?? GENERIC_COLLECT_QUESTION;
    const fallback = await persistFocusAfterChoice({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      decisionReceipt: latest.decisionReceipt,
      followup: {
        ...spokenFollowup,
        user_prompt_hint: spoken,
      },
      askedTurnId: input.askedTurnId ?? null,
    });
    return {
      hostNarration: spoken,
      choiceReady: false,
      focusId: fallback.focus?.id ?? null,
      focus: fallback.focus,
    };
  }
  if (followup?.intent === "collect_method_evidence") {
    const spoken = spokenFollowupForUser(followup);
    if (
      spoken
      && (persistedFocus.status === "created" || persistedFocus.status === "already_open")
    ) {
      return { hostNarration: spoken, choiceReady: false, focus: persistedFocus.focus };
    }
    return persistExhaustionCollect({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      dossier: input.dossier,
      decision: {
        credibleRange: input.nextAction.credible_range,
        representativeTime: input.nextAction.representative_time,
      },
      decisionReceipt: latest.decisionReceipt,
      askedTurnId: input.askedTurnId ?? null,
    });
  }
  if (!followup) {
    if (isNonConvergingRangeOffer({
      canOfferRange: input.nextAction.can_offer_range,
      canAdopt: input.nextAction.can_adopt,
      canConfirmExactMinute: input.nextAction.can_confirm_exact_minute,
      nextAction: input.nextAction.type,
    })) {
      return persistExhaustionCollect({
        accounting: input.accounting,
        userId: input.userId,
        caseId: input.caseId,
        dossier: input.dossier,
        decision: {
          credibleRange: input.nextAction.credible_range,
          representativeTime: input.nextAction.representative_time,
        },
        decisionReceipt: latest.decisionReceipt,
        askedTurnId: input.askedTurnId ?? null,
      });
    }
    return {
      hostNarration: withProspectiveWindows(nonConvergingRangeNarration({
        credibleRange: input.nextAction.credible_range,
        representativeTime: input.nextAction.representative_time,
        openingRange: openingRangeFromDossier(input.dossier),
        variant: input.nextAction.can_adopt ? "delivery" : "intermediate",
        stopReason: input.nextAction.stop_reason,
      }), latest.decisionReceipt),
      choiceReady: false,
    };
  }
  return {
    hostNarration: spokenFollowupForUser(followup) ?? RECTIFICATION_USER_COPY.hostNarrationFallback,
    choiceReady: false,
  };
}

async function persistFocusAfterChoice(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
  decisionReceipt: Readonly<Record<string, unknown>> | null | undefined;
  followup: ReturnType<typeof buildMethodFollowupPlan>["next_followup"];
  askedTurnId?: string | null;
}) {
  let persisted;
  try {
    persisted = await persistServerOwnedFocus({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      activeFocus: null,
      decisionReceipt: input.decisionReceipt,
      followup: input.followup,
      askedTurnId: input.askedTurnId ?? null,
    });
  } catch (error) {
    console.warn(
      `[rectification-v9] persist next focus failed case=${input.caseId} reason=${safeToolErrorCode(error)}`,
    );
    persisted = {
      status: "skipped" as const,
      focus: null,
      questionId: null,
      prompt: null,
    };
  }
  if (persisted.status === "created" || persisted.status === "already_open" || !input.followup) {
    return persisted;
  }
  try {
    const dossier = await loadV9CaseDossier(input.accounting, input.userId, input.caseId);
    return await persistServerOwnedFocus({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      activeFocus: dossier.conversationSummary.activeFocus,
      decisionReceipt: input.decisionReceipt,
      followup: input.followup,
      askedTurnId: input.askedTurnId ?? null,
    });
  } catch (error) {
    console.warn(
      `[rectification-v9] retry next focus failed case=${input.caseId} reason=${safeToolErrorCode(error)}`,
    );
    return persisted;
  }
}

export async function applyCollectFocusDenial(
  accounting: AccountingClient,
  input: { userId: string; caseId: string; focusId: string; deferFollowup?: boolean },
): Promise<{ narration: string; nextInterviewPersisted: boolean; nextChoiceReady: boolean }> {
  const dossier = await loadV9CaseDossier(accounting, input.userId, input.caseId);
  const focus = dossier.conversationSummary.activeFocus;
  if (!focus || focus.id !== input.focusId) {
    throw new RectificationToolServiceError("agentic_rectification_focus_not_active");
  }
  await resolveV10ConversationFocus(accounting, input.userId, input.caseId, {
    focusId: input.focusId,
    status: "declined",
    evidenceId: null,
  });
  if (input.deferFollowup === true) {
    return {
      narration: "记下了，这方面先跳过。",
      nextInterviewPersisted: false,
      nextChoiceReady: false,
    };
  }
  let birthDate: string | null = null;
  try {
    const compute = await loadV9CaseCompute(accounting, input.userId, input.caseId);
    birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
  } catch {
    birthDate = null;
  }
  let latest: V9CaseDossier = dossier;
  try {
    latest = await loadV9CaseDossier(accounting, input.userId, input.caseId);
  } catch {
    latest = dossier;
  }
  const withDeclined = dossierWithClosedFocus({
    ...latest,
    conversationSummary: {
      ...latest.conversationSummary,
      activeFocus: {
        ...focus,
        targetDomain: focus.targetDomain,
      },
    },
  }, "declined");
  const nextAction = publicNextAction(decideFromDossier(withDeclined, { birthDate }));
  const nextInterview = await persistNextInterviewAfterChoice({
    accounting,
    userId: input.userId,
    caseId: input.caseId,
    dossier: withDeclined,
    decisionState: previousInferenceFromReceipt(withDeclined.latestResult?.decisionReceipt ?? null),
    nextAction,
    birthDate,
  });
  return {
    narration: nextInterview.hostNarration,
    nextInterviewPersisted: Boolean(nextInterview.hostNarration) || nextInterview.choiceReady,
    nextChoiceReady: nextInterview.choiceReady,
  };
}

export function isStalePreAdoptFocus(
  acceptedTime: string | null | undefined,
  focus: { intent?: string | null } | null | undefined,
): boolean {
  if (!acceptedTime || !focus) return false;
  const intent = focus.intent ?? "";
  return intent !== "reverse_verify" && intent !== "out_of_sample_check";
}

export async function persistNextInterviewIfIdle(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
  askedTurnId?: string | null;
}): Promise<{ persisted: boolean; choiceReady: boolean; hostNarration: string | null }> {
  let dossier = await loadV9CaseDossier(input.accounting, input.userId, input.caseId);
  const staleFocus = dossier.conversationSummary.activeFocus;
  const staleFocusId = staleFocus?.id;
  if (
    isStalePreAdoptFocus(dossier.case.acceptedTime, staleFocus)
    && isPersistedFocusId(staleFocusId)
  ) {
    try {
      await resolveV10ConversationFocus(input.accounting, input.userId, input.caseId, {
        focusId: staleFocusId,
        status: "skipped",
      });
      dossier = await loadV9CaseDossier(input.accounting, input.userId, input.caseId);
    } catch (error) {
      console.warn(
        `[rectification-v9] close stale pre-adopt focus failed case=${input.caseId} reason=${safeToolErrorCode(error)}`,
      );
    }
  }
  if (dossier.conversationSummary.activeFocus) {
    if (input.askedTurnId) {
      try {
        await linkFocusAskedTurn({
          accounting: input.accounting,
          userId: input.userId,
          caseId: input.caseId,
          focus: dossier.conversationSummary.activeFocus,
          askedTurnId: input.askedTurnId,
        });
      } catch (error) {
        console.warn(
          `[rectification-v9] link idle focus to turn failed case=${input.caseId} reason=${safeToolErrorCode(error)}`,
        );
      }
    }
    return { persisted: false, choiceReady: false, hostNarration: null };
  }
  let birthDate: string | null = null;
  try {
    const compute = await loadV9CaseCompute(input.accounting, input.userId, input.caseId);
    birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
  } catch {
    birthDate = null;
  }
  const decision = decideFromDossier(dossier, { birthDate });
  const catalog = rectificationFollowupCatalog(dossier.latestResult, dossier.evidence);
  const plan = buildMethodFollowupPlan({
    evidence: dossier.evidence,
    activeFocus: null,
    declinedTopics: dossier.conversationSummary.declinedSkippedTopics,
    closedCollectFocuses: dossier.conversationSummary.declinedSkippedTopics,
    sessionOutcome: decision.sessionOutcome,
    ...catalog,
    birthDate,
    accepted: Boolean(dossier.case.acceptedTime),
  });
  const followup = interviewToPersist(plan);
  if (shouldSkipFollowupPersist({
    canAdopt: publicCanAdopt(decision),
    nextAction: decision.nextAction,
    followup,
    methods: plan.methods,
  })) {
    return {
      persisted: false,
      choiceReady: false,
      hostNarration: adoptHostNarration({
        credibleRange: decision.credibleRange,
        representativeTime: decision.representativeTime,
        openingRange: openingRangeFromDossier(dossier),
        receipt: dossier.latestResult?.decisionReceipt,
      }),
    };
  }
  if (isNonConvergingRangeOffer(decision)) {
    return persistExhaustionCollect({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      dossier,
      decision,
      decisionReceipt: dossier.latestResult?.decisionReceipt,
      askedTurnId: input.askedTurnId ?? null,
    });
  }
  if (!followup) {
    return { persisted: false, choiceReady: false, hostNarration: null };
  }
  const nextAction = publicNextAction(decision);
  const nextInterview = await persistNextInterviewAfterChoice({
    accounting: input.accounting,
    userId: input.userId,
    caseId: input.caseId,
    dossier,
    decisionState: previousInferenceFromReceipt(dossier.latestResult?.decisionReceipt ?? null),
    nextAction,
    birthDate,
    askedTurnId: input.askedTurnId ?? null,
  });
  return {
    persisted: Boolean(nextInterview.hostNarration) || nextInterview.choiceReady,
    choiceReady: nextInterview.choiceReady,
    hostNarration: nextInterview.hostNarration,
  };
}

async function persistExhaustionCollect(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
  dossier: {
    evidence: Parameters<typeof exhaustionSpokenCollectFollowup>[0]["evidence"];
    conversationSummary: { declinedSkippedTopics?: readonly Readonly<Record<string, unknown>>[] };
    latestResult?: { decisionReceipt?: Readonly<Record<string, unknown>> | null } | null;
    case?: {
      acceptedTime?: string | null;
      status?: string;
      candidateRange?: { start_time?: string; end_time?: string } | null;
    };
  };
  decision: { credibleRange?: readonly [string, string] | null; representativeTime?: string | null };
  decisionReceipt?: Readonly<Record<string, unknown>> | null;
  askedTurnId?: string | null;
}): Promise<{
  persisted: boolean;
  choiceReady: boolean;
  hostNarration: string;
  focus?: ConversationFocus | null;
}> {
  const followup = exhaustionSpokenCollectFollowup({
    evidence: input.dossier.evidence,
    declinedTopics: input.dossier.conversationSummary.declinedSkippedTopics,
  });
  const range = nonConvergingRangeNarration({
    ...input.decision,
    openingRange: openingRangeFromDossier(input.dossier),
    variant: "intermediate",
  });
  const spoken = spokenFollowupForUser(followup);
  const persistedFocus = followup
    ? await persistFocusAfterChoice({
      accounting: input.accounting,
      userId: input.userId,
      caseId: input.caseId,
      decisionReceipt: input.decisionReceipt ?? input.dossier.latestResult?.decisionReceipt,
      followup,
      askedTurnId: input.askedTurnId ?? null,
    })
    : { status: "skipped" as const, focus: null, questionId: null, prompt: null };
  const persisted = Boolean(spoken) && (
    persistedFocus.status === "created" || persistedFocus.status === "already_open"
  );
  return {
    persisted,
    choiceReady: false,
    hostNarration: withProspectiveWindows(range, input.decisionReceipt ?? input.dossier.latestResult?.decisionReceipt),
    focus: persistedFocus.focus,
  };
}

async function persistApplied(
  accounting: AccountingClient,
  command: ApplyChoiceCommand,
  input: {
    focusId: string;
    questionId: string;
    focusStatus: "resolved" | "declined" | "skipped";
    probeId: string | null;
    optionId: ChoiceOptionId;
    scoring: boolean;
    appliedInference: boolean;
    answerClass: AnswerClass | null;
    sourceQuote: string | null;
    year: number | null;
    expectedRevision: number;
    inference: PersistChoiceActionInput["inference"];
    narration: string;
    userDisplay: string | null;
    decisionState?: InferenceState | null;
    userStopped?: boolean;
    dossier: Parameters<typeof decideAfterInferenceChange>[0]["dossier"];
  },
): Promise<AppliedChoiceReceipt> {
  const persisted = await persistV9ChoiceAction(accounting, command.userId, command.caseId, {
    actionId: command.actionId,
    questionId: input.questionId,
    optionId: input.optionId,
    expectedRevision: input.expectedRevision,
    focusId: input.focusId,
    focusStatus: input.focusStatus,
    sourceQuote: input.sourceQuote,
    derivedContext: structuredProbeContext({
      probeId: input.probeId,
      year: input.year,
      answerClass: input.answerClass as never,
    }),
    narration: input.narration,
    inference: input.inference,
  });

  let birthDate: string | null = null;
  try {
    const compute = await loadV9CaseCompute(accounting, command.userId, command.caseId);
    birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
  } catch {
    // Ranking stays fail-open when compute is unavailable.
  }
  const nextAction = publicNextAction(decideAfterInferenceChange({
    dossier: input.dossier,
    state: input.decisionState ?? null,
    userStopped: input.userStopped === true,
    birthDate,
  }));

  let narrationPersisted = false;
  let nextInterviewPersisted = false;
  let nextChoiceReady = false;
  let hostNarration = input.narration;
  let skippedNextInterview = false;
  let nextFocus: ConversationFocus | null = null;
  if (
    command.deferFollowup !== true
    && input.userStopped !== true
    && shouldContinueAfterStructuredChoice(nextAction)
  ) {
    const nextInterview = await persistNextInterviewAfterChoice({
      accounting,
      userId: command.userId,
      caseId: command.caseId,
      dossier: dossierWithClosedFocus(input.dossier, input.focusStatus),
      decisionState: input.decisionState ?? null,
      nextAction,
      birthDate,
    });
    nextChoiceReady = nextInterview.choiceReady;
    skippedNextInterview = nextInterview.persisted === false;
    nextFocus = nextInterview.focus ?? null;
    if (nextInterview.hostNarration) {
      if (skippedNextInterview) {
        hostNarration = `${input.narration}

${nextInterview.hostNarration}`;
      }
      nextInterviewPersisted = true;
    }
  }
  const adoptionNarration = nextAction.can_adopt
    ? withProspectiveWindows(deliveryAdoptNarration({
      credibleRange: nextAction.credible_range,
      representativeTime: nextAction.representative_time,
      openingRange: openingRangeFromDossier(input.dossier),
      stopReason: nextAction.stop_reason,
    }), input.dossier.latestResult?.decisionReceipt)
    : null;
  const completedRangePrefix = input.narration.replace(RECTIFICATION_TERMINATION_COPY, "").trim();
  const completedRangeNarration = nextAction.type === "complete_with_range"
    ? withProspectiveWindows(`${completedRangePrefix}

${nonConvergingRangeNarration({
  credibleRange: nextAction.credible_range,
  representativeTime: nextAction.representative_time,
  openingRange: openingRangeFromDossier(input.dossier),
  variant: "delivery",
  stopReason: nextAction.stop_reason,
}, RECTIFICATION_TERMINATION_COPY)}`, input.dossier.latestResult?.decisionReceipt)
    : null;
  const keptNextQuestion = nextChoiceReady || (nextInterviewPersisted && !skippedNextInterview);
  if ((adoptionNarration || completedRangeNarration) && !keptNextQuestion) {
    hostNarration = adoptionNarration ?? completedRangeNarration ?? hostNarration;
  }

  if (
    command.deferFollowup !== true
    && (nextInterviewPersisted || !shouldContinueAfterStructuredChoice(nextAction, { nextInterviewPersisted }))
  ) {
    try {
      const turn = await persistV9DeterministicTurn(accounting, command.userId, command.caseId, {
        requestId: command.actionId,
        userMessage: input.userDisplay,
        assistantMessage: hostNarration,
      });
      narrationPersisted = true;
      if (turn.turnId) {
        try {
          const focus = nextFocus ?? (await loadV9CaseDossier(accounting, command.userId, command.caseId))
            .conversationSummary.activeFocus;
          if (focus) {
            await linkFocusAskedTurn({
              accounting,
              userId: command.userId,
              caseId: command.caseId,
              focus,
              askedTurnId: turn.turnId,
            });
          }
        } catch (error) {
          console.warn(
            `[rectification-v9] link choice focus to turn failed case=${command.caseId} reason=${safeToolErrorCode(error)}`,
          );
        }
      }
    } catch {
      narrationPersisted = false;
    }
  }

  const narration = (adoptionNarration || completedRangeNarration || nextInterviewPersisted ? hostNarration : null)
    || (persisted.narration && persisted.narration.trim())
    || hostNarration
    || composeChoiceNarration({
      optionId: input.optionId,
      scoring: input.scoring,
      appliedInference: input.appliedInference,
      answerClass: input.answerClass,
    });

  return {
    applied: true,
    idempotent: persisted.idempotent,
    status: narrationPersisted ? "narrated" : "applied",
    narrationPersisted,
    focusId: input.focusId,
    questionId: input.questionId,
    optionId: input.optionId,
    probeId: persisted.probeId ?? input.probeId,
    revision: persisted.revision,
    answerClass: input.answerClass,
    sourceQuote: input.sourceQuote,
    derivedContext: structuredProbeContext({
      probeId: input.probeId,
      year: input.year,
      answerClass: input.answerClass as never,
    }),
    narration,
    userDisplay: input.userDisplay,
    nextAction,
    nextInterviewPersisted,
    nextChoiceReady,
  };
}

async function inspectNonTerminalTurnExit(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
}) {
  const dossier = await loadV9CaseDossier(input.accounting, input.userId, input.caseId);
  let birthDate: string | null = null;
  try {
    const compute = await loadV9CaseCompute(input.accounting, input.userId, input.caseId);
    birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
  } catch {
    birthDate = null;
  }
  const decision = decideFromDossier(dossier, { birthDate });
  const satisfied = Boolean(
    projectCurrentQuestion(dossier.conversationSummary.activeFocus)
    || dossier.case.acceptedTime
    || dossier.case.confirmedTime
    || decision.completionStatus === "provisional_range_user_stopped"
    || publicCanAdopt(decision)
  );
  return { dossier, decision, satisfied };
}

export async function ensureNonTerminalTurnExit(input: {
  accounting: AccountingClient;
  userId: string;
  caseId: string;
}): Promise<{ persisted: boolean; choiceReady: boolean; hostNarration: string | null }> {
  const before = await inspectNonTerminalTurnExit(input);
  if (before.satisfied) {
    return { persisted: false, choiceReady: false, hostNarration: null };
  }
  console.warn(JSON.stringify({
    event: "rectification_nonterminal_exit_repaired",
    case_id: input.caseId,
    reason: "missing_question_and_adopt_carrier",
  }));
  const repaired = await persistExhaustionCollect({
    accounting: input.accounting,
    userId: input.userId,
    caseId: input.caseId,
    dossier: before.dossier,
    decision: before.decision,
    decisionReceipt: before.dossier.latestResult?.decisionReceipt,
  });
  const after = await inspectNonTerminalTurnExit(input);
  if (!after.satisfied) {
    throw new RectificationToolServiceError("agentic_rectification_nonterminal_exit_missing");
  }
  return repaired;
}

function optionQuoteFromSchema(schema: Readonly<Record<string, unknown>>, optionId: ChoiceKey): string | null {
  const choice = schema.choice && typeof schema.choice === "object" && !Array.isArray(schema.choice)
    ? schema.choice as Record<string, unknown>
    : schema;
  const key = optionId === "A"
    ? "option_a"
    : optionId === "B"
      ? "option_b"
      : optionId === "C"
        ? "option_c"
        : "option_d";
  return asText(choice[key]);
}

function userDisplayFromSchema(schema: Readonly<Record<string, unknown>>, optionId: ChoiceKey): string | null {
  const quote = optionQuoteFromSchema(schema, optionId);
  return quote ? `${optionId}. ${quote}` : optionId;
}