import type { RenderedCliResult } from "../output";
import type { AgentRunResourceOptions } from "./utils";
import { record, stringOrNull } from "./utils";

type SessionSendProjection = {
  kind: "SessionSendPlan" | "SessionSendResult" | "SessionSendError";
  ok: boolean;
  action: string;
  decision: string | null;
  internalCommandType: string | null;
  dryRun: boolean;
  mutation: boolean | null;
  partialWrite: boolean | null;
  reuseRun: boolean | null;
  createRunner: boolean | null;
  resources: Record<string, unknown>;
  runnerAdmission: Record<string, unknown> | null;
  request: Record<string, unknown> | null;
  error: Record<string, unknown> | null;
  next: {
    actions: Array<{ command: string; mutation: boolean; reason: string }>;
    note: string | null;
  };
  valuesPrinted: false;
};

const resourceStateKeys = ["state", "status", "phase", "terminalStatus", "type"] as const;

export function renderSessionSendResult(command: string, raw: Record<string, unknown>, options: AgentRunResourceOptions): RenderedCliResult {
  if (options.raw) return renderSessionSendMachine(command, raw, "json", raw.ok !== false);
  const projection = sessionSendSuccessProjection(command, raw);
  if (options.output === "json" || options.output === "yaml") return renderSessionSendMachine(command, projection, options.output, true);
  return renderSessionSendHuman(command, projection);
}

export function renderSessionSendError(command: string, raw: Record<string, unknown>, options: AgentRunResourceOptions): RenderedCliResult {
  if (options.raw) return renderSessionSendMachine(command, raw, "json", false);
  const projection = sessionSendErrorProjection(raw);
  if (options.output === "json" || options.output === "yaml") return renderSessionSendMachine(command, projection, options.output, false);
  return renderSessionSendHuman(command, projection);
}

export function sessionSendSuccessProjection(command: string, raw: Record<string, unknown>): SessionSendProjection {
  const data = record(innerData(raw));
  const activeBefore = record(data.activeBefore);
  const reusedIdleRun = record(data.reusedIdleRun);
  const run = record(data.run);
  const commandResource = record(data.command);
  const runnerJob = record(data.runnerJob);
  const dispatchIntent = record(commandResource.dispatchIntent);
  const rawRunnerAdmission = record(data.runnerAdmission);
  const runnerAdmission = compactRunnerAdmission(rawRunnerAdmission, dispatchIntent);
  const request = compactRequest(record(data.request));
  const decision = stringOrNull(data.decision);
  const dryRun = data.dryRun === true;
  const reuseRun = decision === null
    ? null
    : decision === "steer" || Object.keys(reusedIdleRun).length > 0;
  const createRunner = resolveCreateRunner({ decision, reuseRun, request: record(data.request), runnerJob, runnerAdmission: rawRunnerAdmission });
  const sessionId = firstString(data.sessionId, record(run.sessionRef).sessionId, activeBefore.sessionId, reusedIdleRun.sessionId);
  const runId = firstString(run.id, data.runId, activeBefore.runId, reusedIdleRun.runId, rawRunnerAdmission.runId);
  const commandId = firstString(commandResource.id, data.commandId, activeBefore.commandId, reusedIdleRun.commandId, rawRunnerAdmission.commandId);
  const dispatchIntentId = firstString(dispatchIntent.id, rawRunnerAdmission.dispatchIntentId);
  const plannedRunnerJobId = firstString(rawRunnerAdmission.plannedRunnerJobId, dispatchIntent.runnerJobId, isPlannedRunnerJob(runnerJob) ? runnerJob.runnerJobId : null);
  const actualRunnerJobId = firstString(
    rawRunnerAdmission.actualRunnerJobId,
    dispatchIntent.actualRunnerJobId,
    isPlannedRunnerJob(runnerJob) ? null : runnerJob.id,
    isPlannedRunnerJob(runnerJob) ? null : runnerJob.runnerJobId,
    Object.keys(rawRunnerAdmission).length === 0 ? data.runnerJobId : null,
  );
  const mutation = booleanOrNull(data.mutation) ?? booleanOrNull(raw.mutation) ?? booleanOrNull(rawRunnerAdmission.mutation);
  const partialWrite = booleanOrNull(rawRunnerAdmission.partialWrite) ?? false;
  const recoveryActions = mergeActionSources(rawRunnerAdmission.recoveryActions, data.pollActions);
  const nextActions = dryRun
    ? [{
        command: sessionSendConfirmCommand(command, sessionId),
        mutation: true,
        reason: "复用同一 prompt stdin，仅在确认计划后提交一次。",
      }]
    : readOnlyNextActions({ sessionId, runId, commandId, runnerJobId: actualRunnerJobId }, recoveryActions);
  return {
    kind: dryRun ? "SessionSendPlan" : "SessionSendResult",
    ok: raw.ok !== false,
    action: firstString(data.action, raw.action) ?? (dryRun ? "session-send-plan" : "session-send"),
    decision,
    internalCommandType: stringOrNull(data.internalCommandType),
    dryRun,
    mutation,
    partialWrite,
    reuseRun,
    createRunner,
    resources: compactResources({
      session: resourceIdentity("session", sessionId, record(data.session)),
      run: resourceIdentity("run", runId, run),
      command: resourceIdentity("command", commandId, commandResource),
      runnerJob: resourceIdentity("runnerjob", actualRunnerJobId, isPlannedRunnerJob(runnerJob) ? {} : runnerJob),
      plannedRunnerJob: plannedRunnerIdentity(plannedRunnerJobId, rawRunnerAdmission),
      dispatchIntent: resourceIdentity("dispatch-intent", dispatchIntentId, dispatchIntent),
    }),
    runnerAdmission,
    request,
    error: null,
    next: {
      actions: nextActions,
      note: dryRun
        ? "dry-run 未写入 durable facts；移除 --dry-run 会由 manager 再次按 session durable state 决定 steer 或 turn。"
        : runnerAdmission === null
          ? "只使用 manager 返回的资源 identity 做只读下钻；不要在客户端补做 runner 调度或状态修复。"
          : "plannedRunnerJobId 只是 durable planned identity，不证明 Kubernetes Job 已创建；只按 manager 返回的只读入口观察 durable state。",
    },
    valuesPrinted: false,
  };
}

export function sessionSendErrorProjection(raw: Record<string, unknown>): SessionSendProjection {
  const agentrun = record(raw.agentrun);
  const nestedError = record(agentrun.error);
  const rootDetails = record(agentrun.details);
  const nestedDetails = record(nestedError.details);
  const details = { ...rootDetails, ...nestedDetails };
  const mutationSummary = record(details.mutationSummary);
  const partialWriteSummary = record(details.partialWrite);
  const resources = record(details.resources);
  const resourceIdentities = record(details.resourceIdentities);
  const session = firstRecord(record(resources.session), record(resourceIdentities.session), record(details.session));
  const run = firstRecord(record(resources.run), record(resourceIdentities.run), record(details.run));
  const commandResource = firstRecord(record(resources.command), record(resourceIdentities.command), record(details.command));
  const runnerJob = firstRecord(record(resources.runnerJob), record(resourceIdentities.runnerJob), record(details.runnerJob));
  const dispatchIntent = firstRecord(record(resources.dispatchIntent), record(resourceIdentities.dispatchIntent), record(commandResource.dispatchIntent), record(details.dispatchIntent));
  const rawRunnerAdmission = firstRecord(record(details.runnerAdmission), record(agentrun.runnerAdmission));
  const runnerAdmission = compactRunnerAdmission(rawRunnerAdmission, dispatchIntent);
  const sessionId = firstString(details.sessionId, session.id, session.sessionId, record(runnerAdmission).sessionId);
  const runId = firstString(details.runId, run.id, run.runId, record(runnerAdmission).runId);
  const commandId = firstString(details.commandId, commandResource.id, commandResource.commandId, record(runnerAdmission).commandId);
  const plannedRunnerJobId = firstString(rawRunnerAdmission.plannedRunnerJobId, dispatchIntent.runnerJobId, isPlannedRunnerJob(runnerJob) ? runnerJob.runnerJobId : null);
  const actualRunnerJobId = firstString(
    rawRunnerAdmission.actualRunnerJobId,
    dispatchIntent.actualRunnerJobId,
    isPlannedRunnerJob(runnerJob) ? null : details.runnerJobId,
    isPlannedRunnerJob(runnerJob) ? null : runnerJob.id,
    isPlannedRunnerJob(runnerJob) ? null : runnerJob.runnerJobId,
  );
  const dispatchIntentId = firstString(details.dispatchIntentId, dispatchIntent.id, rawRunnerAdmission.dispatchIntentId);
  const typedFailureKind = firstString(nestedError.failureKind, details.failureKind, agentrun.failureKind);
  const code = firstString(details.code, nestedError.code, agentrun.code);
  const reason = firstString(details.reason, details.degradedReason, details.changeReason, record(runnerAdmission).reason);
  const mutation = firstBoolean(details.mutation, mutationSummary.mutation, mutationSummary.occurred, record(runnerAdmission).mutation);
  const partialWrite = firstBoolean(
    typeof details.partialWrite === "boolean" ? details.partialWrite : null,
    partialWriteSummary.occurred,
    partialWriteSummary.value,
    mutationSummary.partialWrite,
    record(runnerAdmission).partialWrite,
  );
  const recoveryActions = Array.isArray(details.recoveryActions)
    ? details.recoveryActions
    : Array.isArray(agentrun.recoveryActions)
      ? agentrun.recoveryActions
      : [];
  const nextActions = readOnlyNextActions({ sessionId, runId, commandId, runnerJobId: actualRunnerJobId }, mergeActionSources(rawRunnerAdmission.recoveryActions, recoveryActions));
  const message = truncateOneLine(firstString(raw.message, nestedError.message, agentrun.message) ?? "AgentRun session send failed", 400);
  const errorRetryable = firstBoolean(details.retryable, nestedError.retryable, agentrun.retryable, record(runnerAdmission).retryable);
  const errorRetryAuthority = firstString(details.retryAuthority, nestedError.retryAuthority, agentrun.retryAuthority, record(runnerAdmission).retryAuthority);
  const errorRecoveryAction = firstString(details.recoveryAction, nestedError.recoveryAction, agentrun.recoveryAction, record(runnerAdmission).recoveryAction);
  const errorProjection: Record<string, unknown> = {
    failureKind: stringOrNull(raw.failureKind),
    typedFailureKind,
    code,
    reason,
    message,
    httpStatus: numberOrNull(raw.httpStatus),
    traceId: firstString(details.traceId, agentrun.traceId),
    phase: firstString(details.phase, details.stage),
    durable: firstBoolean(details.durable, record(runnerAdmission).durable),
    valuesPrinted: false,
  };
  if (errorRetryable !== null) errorProjection.retryable = errorRetryable;
  if (errorRetryAuthority !== null) errorProjection.retryAuthority = errorRetryAuthority;
  if (errorRecoveryAction !== null) errorProjection.recoveryAction = errorRecoveryAction;
  return {
    kind: "SessionSendError",
    ok: false,
    action: firstString(details.action, agentrun.action) ?? "session-send",
    decision: firstString(details.decision, agentrun.decision),
    internalCommandType: firstString(details.internalCommandType, agentrun.internalCommandType),
    dryRun: firstBoolean(details.dryRun, agentrun.dryRun) ?? false,
    mutation,
    partialWrite,
    reuseRun: firstBoolean(details.reuseRun, details.reusedRun),
    createRunner: firstBoolean(details.createRunner, details.createRunnerJob, record(runnerAdmission).state === "not-requested" ? false : null),
    resources: compactResources({
      session: resourceIdentity("session", sessionId, session),
      run: resourceIdentity("run", runId, run),
      command: resourceIdentity("command", commandId, commandResource),
      runnerJob: resourceIdentity("runnerjob", actualRunnerJobId, isPlannedRunnerJob(runnerJob) ? {} : runnerJob),
      plannedRunnerJob: plannedRunnerIdentity(plannedRunnerJobId, rawRunnerAdmission),
      dispatchIntent: resourceIdentity("dispatch-intent", dispatchIntentId, dispatchIntent),
    }),
    runnerAdmission,
    request: null,
    error: errorProjection,
    next: {
      actions: nextActions,
      note: partialWrite === true
        ? "manager 已报告 partial write；先按资源 identity 只读核对 durable state，禁止盲目重发、客户端清理或另建 run。"
        : runnerAdmission === null
          ? "先按资源 identity 核对 manager durable state；只有 manager 明确 fail-closed 或给出可重试合同后才能重发。"
          : "plannedRunnerJobId 不是 Kubernetes Job 创建证据；先按只读入口核对 durable state，仅在 manager 明确给出可重试合同后重发。",
    },
    valuesPrinted: false,
  };
}

function renderSessionSendHuman(command: string, projection: SessionSendProjection): RenderedCliResult {
  const lines: string[] = [];
  if (projection.kind === "SessionSendError") {
    const error = record(projection.error);
    lines.push("Session send failed");
    lines.push(`Error: ${display(error.failureKind)}`);
    if (error.typedFailureKind !== null) lines.push(`TypedFailure: ${display(error.typedFailureKind)}`);
    if (error.code !== null) lines.push(`Code: ${display(error.code)}`);
    if (error.reason !== null) lines.push(`Reason: ${display(error.reason)}`);
    lines.push(`Message: ${display(error.message)}`);
    if (error.httpStatus !== null) lines.push(`HTTP: ${display(error.httpStatus)}`);
    if (error.retryable !== null && error.retryable !== undefined) lines.push(`Retryable: ${display(error.retryable)}`);
    if (error.retryAuthority !== null && error.retryAuthority !== undefined) lines.push(`RetryAuthority: ${display(error.retryAuthority)}`);
    if (error.recoveryAction !== null && error.recoveryAction !== undefined) lines.push(`RecoveryAction: ${display(error.recoveryAction)}`);
  } else {
    lines.push(projection.kind === "SessionSendPlan" ? "Session send plan" : "Session send submitted");
    lines.push(`OK: ${String(projection.ok)}`);
  }
  lines.push(`DryRun: ${String(projection.dryRun)}`);
  lines.push(`Decision: ${display(projection.decision)}`);
  lines.push(`CommandType: ${display(projection.internalCommandType)}`);
  lines.push(`ReuseRun: ${display(projection.reuseRun)}`);
  lines.push(`CreateRunner: ${display(projection.createRunner)}`);
  lines.push(`Mutation: ${display(projection.mutation)}`);
  lines.push(`PartialWrite: ${display(projection.partialWrite)}`);
  const resources = Object.values(projection.resources).filter((value) => value !== null).map(record);
  if (resources.length > 0) {
    lines.push("", "Resources:");
    for (const resource of resources) {
      const states = resourceStateKeys
        .map((key) => resource[key] === null || resource[key] === undefined ? null : `${key}=${display(resource[key])}`)
        .filter((value): value is string => value !== null);
      lines.push(`  ${display(resource.kind)}/${display(resource.id)}${states.length === 0 ? "" : ` ${states.join(" ")}`}`);
    }
  }
  if (projection.runnerAdmission !== null) {
    const admission = projection.runnerAdmission;
    lines.push("", "RunnerAdmission:");
    lines.push(`  mode=${display(admission.mode)} state=${display(admission.state)} disposition=${display(admission.disposition)} reason=${display(admission.reason)} durable=${display(admission.durable)}`);
    lines.push(`  runId=${display(admission.runId)} commandId=${display(admission.commandId)} dispatchIntentId=${display(admission.dispatchIntentId)}`);
    lines.push(`  plannedRunnerJobId=${display(admission.plannedRunnerJobId)} actualRunnerJobId=${display(admission.actualRunnerJobId)}`);
    lines.push(`  mutation=${display(admission.mutation)} partialWrite=${display(admission.partialWrite)} recoveredPriorPartialWrite=${display(admission.recoveredPriorPartialWrite)}`);
    lines.push(`  retryable=${display(admission.retryable)} retryAuthority=${display(admission.retryAuthority)} willRetry=${display(admission.willRetry)} recoveryAction=${display(admission.recoveryAction)}`);
    if (admission.plannedRunnerJobId !== null && admission.plannedRunnerJobId !== undefined) {
      lines.push("  Semantics: plannedRunnerJobId 是 durable planned identity；它本身不是 Kubernetes Job 已创建的证据。");
    }
    if (admission.retryable === true && admission.retryAuthority === "dispatcher") {
      lines.push("  Retry: durable dispatcher 负责自动重试；这不是重复执行 session send 的授权。");
    }
  }
  if (projection.next.actions.length > 0 || projection.next.note !== null) {
    lines.push("", "Next:");
    for (const action of projection.next.actions) lines.push(`  ${action.command}`);
    if (projection.next.note !== null) lines.push(`  Note: ${projection.next.note}`);
  }
  return { ok: projection.ok, command, renderedText: lines.join("\n"), contentType: "text/plain" };
}

function compactResources(resources: Record<string, Record<string, unknown> | null>): Record<string, unknown> {
  const result: Record<string, unknown> = {
    session: resources.session,
    run: resources.run,
    command: resources.command,
    runnerJob: resources.runnerJob,
    dispatchIntent: resources.dispatchIntent,
  };
  if (resources.plannedRunnerJob !== null && resources.plannedRunnerJob !== undefined) result.plannedRunnerJob = resources.plannedRunnerJob;
  return result;
}

function resourceIdentity(kind: string, id: string | null, value: Record<string, unknown>): Record<string, unknown> | null {
  if (id === null) return null;
  const identity: Record<string, unknown> = { kind, id };
  for (const key of resourceStateKeys) {
    const field = value[key];
    if (typeof field === "string" || typeof field === "number" || typeof field === "boolean") identity[key] = field;
  }
  if (kind === "dispatch-intent") {
    for (const key of ["runnerJobId", "dispatchOutcome", "actualRunnerJobId", "activeRunnerId", "attemptCount", "durable"] as const) {
      const field = value[key];
      if (typeof field === "string" || typeof field === "number" || typeof field === "boolean" || field === null) identity[key] = field;
    }
  }
  return identity;
}

function compactRunnerAdmission(value: Record<string, unknown>, dispatchIntent: Record<string, unknown> = {}): Record<string, unknown> | null {
  if (Object.keys(value).length === 0) return null;
  const result: Record<string, unknown> = {};
  for (const key of ["mode", "state", "reason", "disposition", "failureKind", "sessionId", "runId", "commandId", "dispatchIntentId", "plannedRunnerJobId", "actualRunnerJobId", "attemptCount", "mutation", "partialWrite", "recoveredPriorPartialWrite", "durable", "retryable", "retryAuthority", "willRetry", "retryAfterMs", "recoveryAction"] as const) {
    const field = value[key];
    if (typeof field === "string" || typeof field === "number" || typeof field === "boolean" || field === null) result[key] = typeof field === "string" ? truncateOneLine(field, 240) : field;
  }
  const actualRunnerJobId = firstString(value.actualRunnerJobId, dispatchIntent.actualRunnerJobId);
  if (actualRunnerJobId !== null) result.actualRunnerJobId = actualRunnerJobId;
  result.valuesPrinted = false;
  return result;
}

function plannedRunnerIdentity(id: string | null, admission: Record<string, unknown>): Record<string, unknown> | null {
  if (id === null) return null;
  const result: Record<string, unknown> = {
    kind: "planned-runnerjob",
    id,
    identityRole: "durable-planned",
    kubernetesJobCreated: null,
    kubernetesJobCreationEvidence: "not-asserted",
  };
  const state = admission.state;
  if (typeof state === "string" || typeof state === "number" || typeof state === "boolean") result.state = state;
  const durable = admission.durable;
  if (typeof durable === "boolean") result.durable = durable;
  return result;
}

function isPlannedRunnerJob(value: Record<string, unknown>): boolean {
  return value.action === "runner-dispatch-admitted";
}

function mergeActionSources(...values: unknown[]): unknown[] {
  return values.flatMap((value) => Array.isArray(value) ? value.slice(0, 12) : []).slice(0, 12);
}

function compactRequest(value: Record<string, unknown>): Record<string, unknown> | null {
  if (Object.keys(value).length === 0) return null;
  const result: Record<string, unknown> = {};
  for (const key of ["method", "path", "commandType", "createRunnerJob", "reusedIdleRun"] as const) {
    const field = value[key];
    if (typeof field === "string" || typeof field === "boolean" || field === null) result[key] = typeof field === "string" ? truncateOneLine(field, 240) : field;
  }
  result.valuesPrinted = false;
  return result;
}

function resolveCreateRunner(input: { decision: string | null; reuseRun: boolean | null; request: Record<string, unknown>; runnerJob: Record<string, unknown>; runnerAdmission: Record<string, unknown> }): boolean | null {
  if (input.decision === "steer" || input.reuseRun === true) return false;
  const requested = booleanOrNull(input.request.createRunnerJob);
  if (requested !== null) return requested;
  const admissionState = stringOrNull(input.runnerAdmission.state);
  if (admissionState === "not-requested") return false;
  if (admissionState !== null) return true;
  if (Object.keys(input.runnerJob).length > 0) return true;
  return input.decision === null ? null : false;
}

function readOnlyNextActions(ids: { sessionId: string | null; runId: string | null; commandId: string | null; runnerJobId: string | null }, rawActions: unknown): Array<{ command: string; mutation: boolean; reason: string }> {
  const commands: string[] = [];
  const add = (command: string | null): void => {
    if (command !== null && !commands.includes(command)) commands.push(command);
  };
  for (const rawAction of Array.isArray(rawActions) ? rawActions.slice(0, 12) : []) {
    if (typeof rawAction === "string") {
      if (isSafeReadCommand(rawAction)) add(rawAction);
      continue;
    }
    const action = record(rawAction);
    const operation = stringOrNull(action.operation);
    const resourceKind = stringOrNull(action.resourceKind);
    const resourceName = stringOrNull(action.resourceName);
    if (operation === "describe" && resourceKind !== null && resourceName !== null) add(`bun scripts/cli.ts agentrun describe ${resourceKind}/${resourceName}`);
    if (operation === "events") {
      const runId = firstString(action.runId, resourceKind === "run" ? resourceName : null);
      if (runId !== null) add(`bun scripts/cli.ts agentrun events run/${runId} --after-seq ${nonNegativeInteger(action.afterSeq) ?? 0} --limit ${positiveInteger(action.limit) ?? 100}`);
    }
    if (operation === "logs") {
      const sessionId = firstString(action.sessionId, resourceKind === "session" ? resourceName : null);
      if (sessionId !== null) add(`bun scripts/cli.ts agentrun logs session/${sessionId} --tail ${positiveInteger(action.limit) ?? 100}`);
    }
  }
  add(ids.sessionId === null ? null : `bun scripts/cli.ts agentrun describe session/${ids.sessionId}`);
  add(ids.runId === null ? null : `bun scripts/cli.ts agentrun events run/${ids.runId} --after-seq 0 --limit 100`);
  add(ids.runId === null || ids.commandId === null ? null : `bun scripts/cli.ts agentrun describe command/${ids.commandId} --run ${ids.runId}`);
  add(ids.runId === null || ids.runnerJobId === null ? null : `bun scripts/cli.ts agentrun describe runnerjob/${ids.runnerJobId} --run ${ids.runId}`);
  return commands.slice(0, 5).map((value) => ({ command: value, mutation: false, reason: "只读核对 manager durable facts。" }));
}

function isSafeReadCommand(value: string): boolean {
  return /^bun scripts\/cli\.ts agentrun (?:get|describe|events|logs|result)\b/u.test(value.trim());
}

function sessionSendConfirmCommand(command: string, sessionId: string | null): string {
  const canonical = command
    .replace(/\s+--dry-run\b/gu, "")
    .replace(/\s+(?:-o|--output)\s+(?:json|yaml|name|wide)\b/gu, "")
    .replace(/\s+(?:-o|--output)=(?:json|yaml|name|wide)\b/gu, "")
    .replace(/\s+--(?:raw|full)\b/gu, "")
    .trim();
  if (/(?:^|\s)--prompt-stdin(?:\s|$)/u.test(canonical)) return `bun scripts/cli.ts ${canonical}`;
  return `bun scripts/cli.ts agentrun send session/${sessionId ?? "<sessionId>"} --prompt-stdin`;
}

function innerData(value: Record<string, unknown>): unknown {
  const data = value.data;
  if (typeof data === "object" && data !== null && !Array.isArray(data)) return data;
  return value;
}

function firstRecord(...values: Record<string, unknown>[]): Record<string, unknown> {
  return values.find((value) => Object.keys(value).length > 0) ?? {};
}

function firstString(...values: unknown[]): string | null {
  for (const value of values) {
    const text = stringOrNull(value);
    if (text !== null) return text;
  }
  return null;
}

function firstBoolean(...values: unknown[]): boolean | null {
  for (const value of values) {
    const boolean = booleanOrNull(value);
    if (boolean !== null) return boolean;
  }
  return null;
}

function booleanOrNull(value: unknown): boolean | null {
  return typeof value === "boolean" ? value : null;
}

function numberOrNull(value: unknown): number | null {
  return typeof value === "number" && Number.isFinite(value) ? value : null;
}

function nonNegativeInteger(value: unknown): number | null {
  return Number.isInteger(value) && Number(value) >= 0 ? Number(value) : null;
}

function positiveInteger(value: unknown): number | null {
  return Number.isInteger(value) && Number(value) > 0 ? Number(value) : null;
}

function truncateOneLine(value: string, max: number): string {
  const normalized = value.replace(/\s+/gu, " ").trim();
  return normalized.length <= max ? normalized : `${normalized.slice(0, Math.max(0, max - 1))}…`;
}

function display(value: unknown): string {
  if (value === null || value === undefined || value === "") return "-";
  return truncateOneLine(String(value), 400);
}

function renderSessionSendMachine(command: string, value: unknown, mode: "json" | "yaml", ok: boolean): RenderedCliResult {
  const renderedText = mode === "json" ? `${JSON.stringify(value, null, 2)}\n` : `${Bun.YAML.stringify(value)}\n`;
  return { ok, command, renderedText, contentType: mode === "json" ? "application/json" : "application/yaml" };
}