(function initializeUnifiedAssistant() {
  const STORAGE_KEY = "cognitive-agent.assistant-messages";
  const CONVERSATION_STORAGE_KEY = "cognitive-agent.conversation-id";
  const MAX_STORED_MESSAGES = 24;
  const COMPOSER_MIN_HEIGHT = 64;
  const COMPOSER_MAX_HEIGHT = 116;
  const WELCOME_TEXT = "你好，我是 AI助手。你可以向我提问，也可以直接交代需要完成的工作。";
  let pendingController = null;
  let pendingMessage = null;
  let latestControlResult = null;
  let initialized = false;

  const $ = (selector, root = document) => root.querySelector(selector);

  function setDrawerOpen(open, { restoreFocus = false } = {}) {
    const drawer = $("#assistantDrawer");
    const trigger = $("#assistantDrawerToggle");
    if (!drawer || !trigger) return;
    document.body.classList.toggle("assistant-drawer-open", open);
    trigger.classList.toggle("active", open);
    trigger.setAttribute("aria-pressed", String(open));
    trigger.setAttribute("aria-expanded", String(open));
    const triggerLabel = open ? "收起AI助手" : "展开AI助手";
    trigger.setAttribute("aria-label", triggerLabel);
    trigger.title = triggerLabel;
    drawer.setAttribute("aria-hidden", String(!open));
    drawer.toggleAttribute("inert", !open);
    const speech = window.CognitiveAgentSpeech;
    if (typeof speech?.setAssistantOpen === "function") {
      void speech.setAssistantOpen(open);
    }
    if (open) {
      requestAnimationFrame(() => $("#utterance")?.focus({ preventScroll: true }));
    } else {
      // A collapsed assistant must never leave an invisible microphone or
      // preview request running in the background.
      if (typeof speech?.setAssistantOpen !== "function") {
        void speech?.stop?.("AI助手已收起，语音输入已停止");
      }
      if (restoreFocus) trigger.focus({ preventScroll: true });
    }
  }

  function installAssistantDrawer() {
    const drawer = $(".v2-operation-shell");
    const heading = $(".v2-operation-heading", drawer);
    if (!drawer || !heading || $("#assistantDrawerToggle")) return;

    drawer.id = "assistantDrawer";
    drawer.setAttribute("role", "dialog");
    drawer.setAttribute("aria-label", "AI助手");

    const actions = document.createElement("div");
    actions.className = "assistant-drawer-actions";
    const reset = $("#newConversation");
    if (reset) {
      reset.classList.add("assistant-drawer-new");
      actions.append(reset);
    }
    heading.append(actions);

    const trigger = document.createElement("button");
    trigger.id = "assistantDrawerToggle";
    trigger.className = "assistant-drawer-toggle v2-panel-control-button";
    trigger.type = "button";
    trigger.setAttribute("aria-controls", drawer.id);
    trigger.setAttribute("aria-pressed", "false");
    trigger.setAttribute("aria-expanded", "false");
    trigger.setAttribute("aria-label", "展开AI助手");
    trigger.title = "展开AI助手";
    trigger.innerHTML = '<i data-lucide="bot-message-square"></i><span class="visually-hidden">AI助手</span><b aria-hidden="true"></b>';
    ($("#v2PanelControlDock") || document.body).append(trigger);

    trigger.addEventListener("click", () => {
      setDrawerOpen(!document.body.classList.contains("assistant-drawer-open"));
    });
    document.addEventListener("keydown", (event) => {
      if (event.key === "Escape" && document.body.classList.contains("assistant-drawer-open")) {
        event.preventDefault();
        setDrawerOpen(false, { restoreFocus: true });
      }
    });
    window.addEventListener("cognitive-agent:module-change", (event) => {
      if (event.detail?.module === "self-extension") setDrawerOpen(false);
    });
    setDrawerOpen(true);
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
  }

  function createMessageId() {
    if (globalThis.crypto?.randomUUID) return `ui-${globalThis.crypto.randomUUID()}`;
    return `ui-${Date.now().toString(36)}-${Math.random().toString(36).slice(2)}`;
  }

  function createConversationId() {
    if (globalThis.crypto?.randomUUID) return `conv-${globalThis.crypto.randomUUID()}`;
    return `conv-${Date.now().toString(36)}-${Math.random().toString(36).slice(2)}`;
  }

  function conversationId() {
    const existing = sessionStorage.getItem(CONVERSATION_STORAGE_KEY)
      || window.CognitiveAgentConsole?.getConversationId?.();
    if (existing) return existing;
    const created = createConversationId();
    sessionStorage.setItem(CONVERSATION_STORAGE_KEY, created);
    return created;
  }

  function loadStoredMessages() {
    try {
      const stored = JSON.parse(sessionStorage.getItem(STORAGE_KEY) || "[]");
      return Array.isArray(stored)
        ? stored.filter((item) => item && ["user", "assistant"].includes(item.role))
        : [];
    } catch (_error) {
      return [];
    }
  }

  function persistMessages() {
    const messages = [...document.querySelectorAll("#assistantMessages [data-message-role]")]
      .map((node) => ({
        role: node.dataset.messageRole,
        content: node.dataset.messageContent || "",
      }))
      .filter((item) => item.content && item.content !== WELCOME_TEXT)
      .slice(-MAX_STORED_MESSAGES);
    sessionStorage.setItem(STORAGE_KEY, JSON.stringify(messages));
  }

  function appendInlineText(container, text) {
    const parts = String(text).split(/(`[^`\n]+`)/g);
    parts.forEach((part) => {
      if (part.startsWith("`") && part.endsWith("`") && part.length > 2) {
        const code = document.createElement("code");
        code.textContent = part.slice(1, -1);
        container.append(code);
      } else {
        container.append(document.createTextNode(part));
      }
    });
  }

  function renderRichText(container, value) {
    container.replaceChildren();
    const sections = String(value).split(/```(?:[\w+-]+)?\n?([\s\S]*?)```/g);
    sections.forEach((section, index) => {
      if (index % 2 === 1) {
        const pre = document.createElement("pre");
        const code = document.createElement("code");
        code.textContent = section.replace(/\n$/, "");
        pre.append(code);
        container.append(pre);
        return;
      }
      const lines = section.split("\n");
      let list = null;
      lines.forEach((line) => {
        const bullet = line.match(/^\s*[-*]\s+(.+)$/);
        if (bullet) {
          if (!list) {
            list = document.createElement("ul");
            container.append(list);
          }
          const item = document.createElement("li");
          appendInlineText(item, bullet[1]);
          list.append(item);
          return;
        }
        list = null;
        if (!line.trim()) return;
        const heading = line.match(/^#{1,3}\s+(.+)$/);
        const block = document.createElement(heading ? "strong" : "p");
        if (heading) block.className = "assistant-inline-heading";
        appendInlineText(block, heading ? heading[1] : line);
        container.append(block);
      });
    });
  }

  function shouldFollowLatest(transcript) {
    return transcript.scrollHeight - transcript.scrollTop - transcript.clientHeight < 90;
  }

  function followLatest(force = false) {
    const transcript = $("#assistantTranscript");
    if (!transcript || (!force && !shouldFollowLatest(transcript))) return;
    requestAnimationFrame(() => {
      transcript.scrollTop = transcript.scrollHeight;
    });
  }

  function resizeComposerInput(input = $("#utterance")) {
    if (!input) return;
    input.style.height = "auto";
    const contentHeight = input.scrollHeight;
    const nextHeight = Math.max(
      COMPOSER_MIN_HEIGHT,
      Math.min(contentHeight, COMPOSER_MAX_HEIGHT),
    );
    input.style.height = `${nextHeight}px`;
    const scrollable = contentHeight > COMPOSER_MAX_HEIGHT + 1;
    input.classList.toggle("is-scrollable", scrollable);
    if (!scrollable) input.scrollTop = 0;
  }

  function createMessage(role, content = "", { pending = false } = {}) {
    const article = document.createElement("article");
    article.className = `assistant-message assistant-message-${role}`;
    article.dataset.messageId = createMessageId();
    article.dataset.messageRole = role;
    article.dataset.messageContent = content;

    if (role === "assistant") {
      const avatar = document.createElement("span");
      avatar.className = "assistant-avatar";
      avatar.setAttribute("aria-hidden", "true");
      avatar.innerHTML = '<i data-lucide="waypoints"></i>';
      article.append(avatar);
    }

    const body = document.createElement("div");
    body.className = "assistant-message-body";
    const contentNode = document.createElement("div");
    contentNode.className = "assistant-message-content";
    if (pending && !content) {
      contentNode.classList.add("assistant-thinking");
      contentNode.innerHTML = '<span>正在理解你的需求</span><i></i><i></i><i></i>';
    } else if (role === "assistant") {
      renderRichText(contentNode, content);
    } else {
      contentNode.textContent = content;
    }
    body.append(contentNode);

    const action = document.createElement("div");
    action.className = "assistant-action-status";
    action.hidden = true;
    action.setAttribute("role", "status");
    body.append(action);
    article.append(body);
    $("#assistantMessages").append(article);
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
    followLatest(true);
    return { article, body, contentNode, action, content };
  }

  function setMessageContent(message, content, { final = false } = {}) {
    message.content = content;
    message.article.dataset.messageContent = content;
    message.contentNode.classList.remove("assistant-thinking");
    if (final) renderRichText(message.contentNode, content);
    else message.contentNode.textContent = content;
    followLatest();
  }

  function setActionStatus(message, text, state = "working") {
    message.action.hidden = !text;
    message.action.className = `assistant-action-status ${state}`;
    message.action.replaceChildren();
    if (!text) return;
    const icon = document.createElement("i");
    icon.setAttribute(
      "data-lucide",
      state === "success" ? "circle-check" : state === "failed" ? "circle-x" : "loader-circle",
    );
    const label = document.createElement("span");
    label.textContent = text;
    message.action.append(icon, label);
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
    followLatest();
  }

  function appendModeCreatedState(message, profile, { updated = false } = {}) {
    if (!message?.body || !profile?.id) return;
    const selector = `[data-assistant-mode-created="${CSS.escape(String(profile.id))}"]`;
    if ($(selector, message.body)) return;
    const card = document.createElement("div");
    card.className = "assistant-mode-created";
    card.dataset.assistantModeCreated = String(profile.id);

    const icon = document.createElement("span");
    icon.className = "assistant-mode-created-icon";
    icon.innerHTML = '<i data-lucide="circle-check"></i>';

    const copy = document.createElement("span");
    copy.className = "assistant-mode-created-copy";
    const label = document.createElement("small");
    label.textContent = updated ? "已更新「我的模式」" : "已添加到「我的模式」";
    const name = document.createElement("strong");
    name.textContent = String(profile.name || "新功能模式");
    copy.append(label, name);

    const reveal = document.createElement("button");
    reveal.type = "button";
    reveal.textContent = "查看";
    reveal.addEventListener("click", () => {
      window.CognitiveAgentConsole?.revealModeProfile?.(String(profile.id), { focus: true });
    });
    card.append(icon, copy, reveal);
    message.body.append(card);
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
    followLatest(true);
  }

  function modeDraftRows(draft, rawActions) {
    const instruction = String(draft?.instruction || "");
    const actions = Array.isArray(rawActions)
      ? rawActions.filter((item) => item && typeof item === "object")
      : [];
    const consumed = new Set();
    const rows = [];
    const targetZone = (action) => String(
      action?.target?.instance || action?.target?.zone || action?.target || "",
    );
    const parameters = (action) => (
      action?.parameters && typeof action.parameters === "object" ? action.parameters : {}
    );
    const instructionOrder = (...terms) => {
      const indexes = terms.map((term) => instruction.indexOf(term)).filter((index) => index >= 0);
      return indexes.length ? Math.min(...indexes) : 10_000 + rows.length;
    };
    const addRow = (label, value, icon, order, indexes = []) => {
      indexes.forEach((index) => consumed.add(index));
      rows.push({ label, value, icon, order });
    };

    const zeroGravityIndexes = actions
      .map((action, index) => ({ action, index }))
      .filter(({ action }) => String(action.capability || "").startsWith("seat.set_")
        && ["passenger", "front_right"].includes(targetZone(action)))
      .map(({ index }) => index);
    if (/零重力/.test(instruction) && zeroGravityIndexes.length >= 2) {
      addRow(
        "副驾座椅",
        "零重力模式",
        "armchair",
        instructionOrder("副驾", "零重力"),
        zeroGravityIndexes,
      );
    }

    const lightIndexes = actions
      .map((action, index) => ({ action, index }))
      .filter(({ action }) => ["interior_light", "ambient_light"].includes(String(action.domain || "")))
      .map(({ index }) => index);
    if (
      lightIndexes.length >= 2
      && /(?:灯光.*(?:全部|所有|全车).*(?:关闭|关掉|熄灭)|(?:全部|所有|全车).*灯光.*(?:关闭|关掉|熄灭))/.test(instruction)
    ) {
      addRow(
        "座舱灯光",
        "全部关闭",
        "lightbulb-off",
        instructionOrder("灯光"),
        lightIndexes,
      );
    }

    const motionLabel = (value) => ({
      open: "打开",
      close: "关闭",
      stop: "停止",
      half: "半开",
      on: "开启",
      off: "关闭",
    }[String(value)] || String(value || "已配置"));
    actions.forEach((action, index) => {
      if (consumed.has(index)) return;
      const capability = String(action.capability || "");
      const domain = String(action.domain || "");
      const zone = targetZone(action);
      const params = parameters(action);
      let label = capability || domain || "座舱设备";
      let value = "已配置";
      let icon = "sliders-horizontal";
      let order = 10_000 + index;

      if (capability === "roof.set_shade_motion" || capability === "roof.set_shade_position") {
        label = "遮阳帘";
        value = params.position_pct != null ? `${params.position_pct}%` : motionLabel(params.motion);
        icon = "blinds";
        order = instructionOrder("遮阳帘", "天幕帘");
      } else if (domain === "window") {
        const windowLabels = {
          all: "全部车窗",
          front: "前排车窗",
          rear: "后排车窗",
          front_left: "主驾车窗",
          front_right: "副驾车窗",
          rear_left: "左后车窗",
          rear_right: "右后车窗",
        };
        label = windowLabels[zone] || "车窗";
        value = params.position_pct != null ? `${params.position_pct}%` : motionLabel(params.motion);
        icon = "panels-top-left";
        order = instructionOrder("车窗");
      } else if (domain === "seat") {
        const seatLabel = ["passenger", "front_right"].includes(zone) ? "副驾" : "主驾";
        const seatCapabilityLabels = {
          "seat.set_longitudinal_position": "座椅前后位置",
          "seat.set_cushion_tilt": "坐垫角度",
          "seat.set_backrest_recline": "靠背角度",
          "seat.set_legrest_height": "腿托高度",
        };
        label = `${seatLabel}${seatCapabilityLabels[capability] || "座椅"}`;
        value = params.position_pct != null
          ? `${params.position_pct}%${params.angle_deg != null ? `（${params.angle_deg}°）` : ""}`
          : motionLabel(params.state || params.mode_id);
        icon = "armchair";
        order = instructionOrder("座椅", "副驾", "主驾");
      } else if (capability === "climate.set_temperature") {
        label = "空调温度";
        value = `${params.temperature_c ?? "--"}℃`;
        icon = "thermometer";
        order = instructionOrder("空调", "温度");
      } else if (domain === "climate") {
        const cycleLabels = { internal: "内循环", external: "外循环", auto: "自动循环" };
        label = capability === "climate.set_fan_level" ? "空调风量"
          : capability === "climate.set_cycle_mode" ? "空调循环" : "空调";
        value = params.level != null ? `${params.level}档`
          : params.mode != null ? (cycleLabels[String(params.mode)] || String(params.mode))
            : motionLabel(params.state);
        icon = "fan";
        order = instructionOrder("空调", "风量");
      } else if (capability === "interior_light.set_reading_power") {
        label = "阅读灯";
        value = motionLabel(params.state);
        icon = "book-open";
        order = instructionOrder("阅读灯", "灯光");
      } else if (["interior_light", "ambient_light"].includes(domain)) {
        label = domain === "ambient_light" ? "氛围灯" : "室内灯";
        value = motionLabel(params.state);
        icon = "lightbulb";
        order = instructionOrder(label, "灯光");
      }
      addRow(label, value, icon, order, [index]);
    });
    return rows.sort((left, right) => left.order - right.order);
  }

  async function saveModeProfileDraft(message, card, draft, buttons, status) {
    buttons.forEach((button) => { button.disabled = true; });
    card.classList.add("is-busy");
    status.hidden = false;
    status.className = "assistant-mode-draft-status working";
    const existingModeId = String(draft.existing_mode_id || "").trim();
    status.textContent = existingModeId
      ? "正在将验证结果保存为模式更新…"
      : "正在保存到「我的模式」…";
    try {
      const endpoint = existingModeId
        ? `/api/mode-profiles/${encodeURIComponent(existingModeId)}`
        : "/api/mode-profiles";
      const response = await window.CognitiveAgentNetwork.request(endpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          name: draft.name,
          instruction: draft.instruction,
          source_request_id: draft.source_request_id,
          vehicle_id: draft.vehicle_id || $("#vehicleSelect")?.value || null,
        }),
        timeoutMs: 45 * 1000,
        retries: 0,
      });
      const payload = await response.json();
      if (response.status === 401) {
        window.location.replace("/login");
        return;
      }
      if (!response.ok) throw new Error(payload.message || payload.error || `HTTP ${response.status}`);
      card.classList.remove("is-busy");
      card.classList.add("is-saved");
      status.className = "assistant-mode-draft-status success";
      status.textContent = existingModeId ? "模式已更新" : "模式已保存";
      card.querySelector(".assistant-mode-draft-actions")?.setAttribute("hidden", "");
      await window.CognitiveAgentConsole?.refreshModeProfiles?.(payload.mode_profile?.id);
      appendModeCreatedState(message, payload.mode_profile, { updated: Boolean(existingModeId) });
      persistMessages();
    } catch (error) {
      card.classList.remove("is-busy");
      status.className = "assistant-mode-draft-status failed";
      status.textContent = error.message || "保存失败，请重试。";
      buttons.forEach((button) => { button.disabled = false; });
    }
  }

  async function tryModeProfileDraft(card, draft, actions, buttons, status) {
    buttons.forEach((button) => { button.disabled = true; });
    card.classList.add("is-busy");
    status.hidden = false;
    status.className = "assistant-mode-draft-status working";
    status.textContent = "正在进行模拟试运行…";
    try {
      const result = await window.CognitiveAgentConsole?.tryModeDraft?.({ ...draft, actions });
      if (!result || result.status !== "succeeded") throw new Error("试运行未通过，请检查动作设置。");
      status.className = "assistant-mode-draft-status success";
      status.textContent = "试运行通过 · 尚未保存";
    } catch (error) {
      status.className = "assistant-mode-draft-status failed";
      status.textContent = error.message || "试运行失败，请重试。";
    } finally {
      card.classList.remove("is-busy");
      buttons.forEach((button) => { button.disabled = false; });
    }
  }

  function appendModeDraftState(message, draft, actions) {
    if (!message?.body || !draft?.name || !draft?.source_request_id) return;
    const selector = `[data-assistant-mode-draft="${CSS.escape(String(draft.source_request_id))}"]`;
    if ($(selector, message.body)) return;
    const card = document.createElement("section");
    card.className = "assistant-mode-draft";
    card.dataset.assistantModeDraft = String(draft.source_request_id);
    message.article?.classList.add("assistant-message-mode-draft");

    const heading = document.createElement("header");
    const headingCopy = document.createElement("span");
    const eyebrow = document.createElement("small");
    eyebrow.textContent = draft.existing_mode_id
      ? "已载入现有功能模式"
      : "已为你生成功能模式";
    const title = document.createElement("strong");
    title.textContent = `「${draft.name}」`;
    headingCopy.append(eyebrow, title);
    const badge = document.createElement("span");
    badge.className = "assistant-mode-draft-badge";
    badge.textContent = `${Number(draft.operation_count) || 0} 项动作`;
    heading.append(headingCopy, badge);

    const list = document.createElement("div");
    list.className = "assistant-mode-draft-list";
    modeDraftRows(draft, actions).forEach((item) => {
      const row = document.createElement("div");
      row.className = "assistant-mode-draft-row";
      const icon = document.createElement("i");
      icon.dataset.lucide = item.icon;
      const label = document.createElement("span");
      label.textContent = item.label;
      const value = document.createElement("strong");
      value.textContent = item.value;
      row.append(icon, label, value);
      list.append(row);
    });

    const controls = document.createElement("div");
    controls.className = "assistant-mode-draft-actions";
    const save = document.createElement("button");
    save.type = "button";
    save.className = "assistant-mode-draft-save";
    save.innerHTML = draft.existing_mode_id
      ? '<i data-lucide="refresh-cw"></i><span>确认更新此模式</span>'
      : '<i data-lucide="bookmark-plus"></i><span>保存为功能模式</span>';
    const trial = document.createElement("button");
    trial.type = "button";
    trial.className = "assistant-mode-draft-trial";
    trial.textContent = "先试运行";
    controls.append(save, trial);
    const status = document.createElement("p");
    status.className = "assistant-mode-draft-status";
    status.hidden = true;
    status.setAttribute("role", "status");
    const buttons = [save, trial];
    save.addEventListener("click", () => {
      void saveModeProfileDraft(message, card, draft, buttons, status);
    });
    trial.addEventListener("click", () => {
      void tryModeProfileDraft(card, draft, actions, buttons, status);
    });

    card.append(heading, list, controls, status);
    message.body.append(card);
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
    followLatest(true);
  }

  function startModeCreation() {
    setDrawerOpen(true);
    const input = $("#utterance");
    if (!input) return;
    const helper = createMessage(
      "assistant",
      "告诉我模式名称和希望联动的座舱状态。比如：创建宝宝睡眠模式，副驾半躺、空调 24℃、关闭阅读灯。我会先生成动作预览，确认后再加入「我的模式」。",
    );
    helper.article.classList.add("assistant-mode-guide");
    input.value = "请帮我创建一个";
    input.dispatchEvent(new Event("input", { bubbles: true }));
    input.focus({ preventScroll: true });
    input.setSelectionRange(input.value.length, input.value.length);
  }

  function setComposerPending(pending) {
    const button = $("#runButton");
    const input = $("#utterance");
    if (!button || !input) return;
    document.body.classList.toggle("assistant-drawer-busy", pending);
    button.classList.toggle("assistant-stop", pending);
    button.setAttribute("aria-label", pending ? "停止生成" : "发送消息");
    button.title = pending ? "停止生成" : "发送消息";
    // General questions must stay available even when no physical CAN adapter
    // is connected; hardware eligibility is evaluated only for control routes.
    button.disabled = false;
    button.innerHTML = pending
      ? '<i data-lucide="square"></i><span>停止</span>'
      : '<i data-lucide="send-horizontal"></i><span>发送</span>';
    input.setAttribute("aria-busy", String(pending));
    window.lucide?.createIcons({ attrs: { "aria-hidden": "true" } });
  }

  function requestBody(message) {
    const executionMode = window.CognitiveAgentConsole?.getExecutionMode?.() || "dry_run";
    const controlTransport = localStorage.getItem("cognitive-agent.control-transport") || "wired_can";
    const hardwareClientId = localStorage.getItem("cognitive-agent.hardware-client-id");
    const vehicleId = $("#vehicleSelect")?.value || null;
    return {
      message,
      conversation_id: conversationId(),
      client_type: "web_console_codex_assistant",
      execution_mode: executionMode,
      control_transport: controlTransport,
      ...(vehicleId ? { vehicle_id: vehicleId } : {}),
      ...(executionMode === "hardware" && controlTransport !== "wireless_mqtt" && hardwareClientId
        ? { hardware_client_id: hardwareClientId }
        : {}),
      ...(executionMode === "simulated_hardware"
        ? { simulation_fault: $("#simulationFault")?.value || "normal" }
        : {}),
    };
  }

  async function readErrorResponse(response) {
    try {
      const payload = await response.json();
      return payload.message || payload.error || `HTTP ${response.status}`;
    } catch (_error) {
      return `HTTP ${response.status}`;
    }
  }

  function applyAssistantEvent(event, message) {
    if (event.type === "answer.delta") {
      setMessageContent(message, `${message.content}${event.delta || ""}`);
      return;
    }
    if (["action.started", "action.progress", "work.started", "work.progress"].includes(event.type)) {
      const defaultText = event.type.startsWith("work.")
        ? "AI助手正在处理工作……"
        : "正在执行座舱控制……";
      setActionStatus(message, event.display_text || defaultText, "working");
      if (event.type === "action.progress" && event.payload) {
        window.dispatchEvent(new CustomEvent("cognitive-agent:vehicle-control-activity", {
          detail: event.payload,
        }));
      }
      return;
    }
    if (event.type === "action.completed" || event.type === "work.completed") {
      latestControlResult = event.payload || latestControlResult;
      const completed = event.success !== false;
      const defaultText = event.type === "work.completed"
        ? (completed ? "AI助手已完成工作" : "AI助手未能完成工作")
        : (completed ? "座舱控制已完成" : "座舱控制未完成");
      setActionStatus(
        message,
        event.display_text || defaultText,
        completed ? "success" : "failed",
      );
      if (event.payload) {
        window.CognitiveAgentConsole?.applySyncedResult?.(event.payload);
        if (
          event.payload.mode_profile_draft
          && event.payload.orchestration_route === "mode_profile_create_preview"
        ) {
          appendModeDraftState(
            message,
            event.payload.mode_profile_draft,
            event.payload.actions,
          );
        } else if (
          event.payload.mode_profile
          && event.payload.orchestration_route === "mode_profile_create"
        ) {
          appendModeCreatedState(message, event.payload.mode_profile);
        }
      }
      return;
    }
    if (event.type === "answer.completed") {
      const authoritativeAnswer = Object.prototype.hasOwnProperty.call(event, "answer")
        ? String(event.answer || "")
        : message.content;
      setMessageContent(message, authoritativeAnswer, { final: true });
      return;
    }
    if (event.type === "error") {
      const error = new Error(event.message || "请求处理失败");
      error.code = event.error;
      throw error;
    }
  }

  async function streamAssistant(messageText, assistantMessage, signal) {
    const response = await window.CognitiveAgentNetwork.request("/api/assistant/stream", {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Accept: "application/x-ndjson",
      },
      body: JSON.stringify(requestBody(messageText)),
      timeoutMs: 15 * 60 * 1000,
      retries: 0,
      signal,
    });
    if (!response.ok) throw new Error(await readErrorResponse(response));
    if (!response.body?.getReader) throw new Error("当前浏览器不支持流式问答");

    const reader = response.body.getReader();
    const decoder = new TextDecoder();
    let buffered = "";
    let answerCompleted = false;
    const abortError = () => {
      const error = new Error("助手响应已取消");
      error.name = "AbortError";
      return error;
    };
    const cancelReader = () => {
      // CognitiveAgentNetwork resolves once response headers arrive. Cancelling
      // the body reader keeps the Stop button effective for the remaining
      // long-lived NDJSON stream as well.
      reader.cancel(signal.reason).catch(() => {});
    };
    signal.addEventListener("abort", cancelReader, { once: true });
    try {
      if (signal.aborted) {
        await reader.cancel(signal.reason).catch(() => {});
        throw abortError();
      }
      while (true) {
        const { done, value } = await reader.read();
        if (signal.aborted) throw abortError();
        buffered += decoder.decode(value || new Uint8Array(), { stream: !done });
        const lines = buffered.split("\n");
        buffered = done ? "" : lines.pop() || "";
        for (const line of lines) {
          if (!line.trim()) continue;
          const event = JSON.parse(line);
          applyAssistantEvent(event, assistantMessage);
          if (event.type === "answer.completed") answerCompleted = true;
        }
        if (done) break;
      }
      if (buffered.trim()) {
        const event = JSON.parse(buffered);
        applyAssistantEvent(event, assistantMessage);
        if (event.type === "answer.completed") answerCompleted = true;
      }
      if (!answerCompleted) throw new Error("助手响应意外中断，请重试。");
    } finally {
      signal.removeEventListener("abort", cancelReader);
      reader.releaseLock();
    }
  }

  async function submitAssistant() {
    if (pendingController) {
      pendingController.abort("user_stop");
      return;
    }
    const input = $("#utterance");
    const speechPhase = window.CognitiveAgentSpeech?.phase;
    const speechInputMode = window.CognitiveAgentSpeech?.inputMode;
    if (["capturing", "finalizing"].includes(speechPhase)
      || (speechPhase === "arming" && speechInputMode === "manual")) {
      window.CognitiveAgentConsole?.notify?.("请等待语音整理完成后再发送");
      return;
    }
    const messageText = input?.value.trim() || "";
    if (!messageText) {
      window.CognitiveAgentConsole?.notify?.("请输入问题或工作需求");
      return;
    }

    createMessage("user", messageText);
    input.value = "";
    delete input.dataset.speechStage;
    delete input.dataset.speechUtteranceId;
    delete input.dataset.speechValue;
    input.dispatchEvent(new Event("input", { bubbles: true }));
    const assistantMessage = createMessage("assistant", "", { pending: true });
    pendingMessage = assistantMessage;
    latestControlResult = null;
    pendingController = new AbortController();
    setComposerPending(true);

    let completedError = null;
    try {
      await streamAssistant(messageText, assistantMessage, pendingController.signal);
      setMessageContent(assistantMessage, assistantMessage.content, { final: true });
      persistMessages();
    } catch (error) {
      completedError = error;
      if (pendingController.signal.aborted) {
        const stopped = assistantMessage.content
          ? `${assistantMessage.content}\n\n已停止继续生成。已下发的车辆操作仍会由安全执行链路完成。`
          : "已停止生成。已下发的车辆操作仍会由安全执行链路完成。";
        setMessageContent(assistantMessage, stopped, { final: true });
        setActionStatus(assistantMessage, "已停止显示", "failed");
      } else {
        setMessageContent(assistantMessage, error.message || "请求处理失败，请稍后再试。", {
          final: true,
        });
        setActionStatus(assistantMessage, "本次请求未完成", "failed");
      }
      persistMessages();
    } finally {
      pendingController = null;
      pendingMessage = null;
      setComposerPending(false);
      input.focus({ preventScroll: true });
      window.dispatchEvent(new CustomEvent("cognitive-agent:request-complete", {
        detail: {
          utterance: messageText,
          result: latestControlResult,
          error: completedError,
        },
      }));
    }
  }

  function renderInitialMessages() {
    const container = $("#assistantMessages");
    if (!container) return;
    const stored = loadStoredMessages();
    container.replaceChildren();
    createMessage("assistant", WELCOME_TEXT);
    stored.forEach((message) => createMessage(message.role, String(message.content || "")));
  }

  function initialize() {
    if (initialized || !$("#requestForm") || !$("#assistantMessages")) return;
    initialized = true;
    document.body.classList.add("assistant-chat-enabled");
    const title = $(".v2-operation-heading h2");
    if (title) title.textContent = "AI助手";
    const input = $("#utterance");
    input.value = "";
    input.placeholder = "向 AI助手提问或交代工作";
    input.setAttribute("aria-label", "向 AI助手提问或交代工作");
    installAssistantDrawer();
    input.addEventListener("input", () => resizeComposerInput(input));
    resizeComposerInput(input);
    // Some browsers restore the last submitted textarea value after
    // DOMContentLoaded. Clear that restoration once the initial page settles so
    // a reload cannot accidentally resend an already handled vehicle command.
    window.setTimeout(() => {
      if (pendingController) return;
      input.value = "";
      resizeComposerInput(input);
    }, 300);
    renderInitialMessages();
    setComposerPending(false);
  }

  document.addEventListener("submit", (event) => {
    if (!(event.target instanceof HTMLFormElement) || event.target.id !== "requestForm") return;
    event.preventDefault();
    event.stopImmediatePropagation();
    submitAssistant();
  }, true);

  document.addEventListener("click", (event) => {
    const target = event.target instanceof Element ? event.target : null;
    if (!target?.closest("#newConversation")) return;
    sessionStorage.removeItem(STORAGE_KEY);
    sessionStorage.setItem(CONVERSATION_STORAGE_KEY, createConversationId());
  }, true);

  document.addEventListener("DOMContentLoaded", initialize);
  window.CognitiveAgentAssistant = {
    submit: submitAssistant,
    open: () => setDrawerOpen(true),
    close: () => setDrawerOpen(false),
    startModeCreation,
    announceModeCreated(profile) {
      if (!profile?.id) return;
      setDrawerOpen(true);
      const message = createMessage("assistant", `已完成「${profile.name || "新功能模式"}」的配置。`);
      appendModeCreatedState(message, profile);
      persistMessages();
    },
    stop() {
      pendingController?.abort("user_stop");
    },
    isPending: () => Boolean(pendingMessage),
  };
  if (window.__N7WEB_ASSISTANT_TEST__ === true) {
    window.CognitiveAgentAssistant.__test = { setDrawerOpen };
  }
}());