"use client";

import {
  AlertCircle,
  BarChart3,
  Bot,
  FileText,
  Info,
  Loader2,
  MessageSquareQuote,
  Minus,
  RefreshCw,
  Search,
  Send,
  Square,
  Trash2,
  User,
} from "lucide-react";
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import {
  Badge,
  Button,
  EmptyState,
  Modal,
  cn,
  formatTime,
  statusTone,
  useToast,
} from "@/components/admin/ui";
import { ApiError } from "@/lib/api";
import { errMessage } from "@/lib/admin-api";
import {
  advisorErrorHint,
  assistantApi,
  draftStatusLabel,
  hasFundCode,
  intentLabel,
  newSessionId,
  sceneLabel,
  waitForNewDraft,
  type AgentDraft,
  type DataQueryResult,
  type FundAnalysisItem,
  type FundAnalysisResult,
} from "@/lib/assistant-api";

/* ------------------------------------------------------------------ 类型 */

interface DataTableSnapshot {
  columns: string[];
  rows: Record<string, unknown>[];
  truncated: boolean;
  warnings: string[];
}

interface ChatMessage {
  id: string;
  role: "user" | "assistant";
  content: string;
  intent?: string;
  scene?: string;
  draftId?: string;
  error?: boolean;
  traceId?: string;
  /** 错误条上的「下一步怎么做」。 */
  hint?: string;
  /** 错误条上的「换个工具重试」：工具名 + 原始问题。 */
  retryTool?: ToolKey;
  retryQuery?: string;
  /** 数据查询带回来的结果集，用于气泡里的预览表和详情弹窗。 */
  table?: DataTableSnapshot;
  /** 生成这张表的原始问题（原样送给后端，翻页重查时保持一致）。 */
  tableQuery?: string;
}

const QUICK_TOOLS = [
  {
    key: "data-query",
    label: "查客户数据",
    icon: Search,
    hint: "自然语言查询客户数据，问题里写明客户编号或姓名即可返回表格",
  },
  {
    key: "fund-analysis",
    label: "基金分析",
    icon: BarChart3,
    hint: "问题里需带完整基金代码，形如 F000001",
  },
  {
    key: "talk-script",
    label: "生成话术",
    icon: MessageSquareQuote,
    hint: "按场景生成合规话术（市场波动 / 投诉 / 风控拦截 / 组合偏离）",
  },
  {
    key: "rebalance",
    label: "调仓再平衡",
    icon: RefreshCw,
    hint: "异步生成调仓草稿，仅限已签约客户",
  },
] as const;

type ToolKey = (typeof QUICK_TOOLS)[number]["key"];

/** 结果集分页大小：后端 /data-query 的 page_size 直接落到 SQL 的 LIMIT。 */
const TABLE_PAGE_SIZE = 20;

/** 调仓草稿由后台任务生成，轮询多久算超时。 */
const REBALANCE_WAIT_MS = 30_000;

/** 后端 chat/stream 未装配 rebalance 分支，命中这些词时给出「换工具」的指引。 */
const REBALANCE_WORDS = /(调仓|再平衡|组合偏离|持仓诊断)/;
const SCRIPT_WORDS = /(话术|怎么和客户说|解释给客户)/;

function draftKey(draft: AgentDraft): string {
  return draft.draft_id ?? draft.id ?? "";
}

function suggestToolForError(query: string): ToolKey | undefined {
  if (REBALANCE_WORDS.test(query)) return "rebalance";
  if (SCRIPT_WORDS.test(query)) return "talk-script";
  return undefined;
}

function cellText(value: unknown): string {
  if (value === null || value === undefined || value === "") return "--";
  if (typeof value === "object") return JSON.stringify(value);
  return String(value);
}

function toSnapshot(result: DataQueryResult): DataTableSnapshot | undefined {
  const columns = Array.isArray(result.columns) ? result.columns : [];
  const rows = Array.isArray(result.rows) ? result.rows : [];
  if (!columns.length || !rows.length) return undefined;
  return {
    columns,
    rows,
    truncated: !!result.truncated,
    warnings: Array.isArray(result.warnings) ? result.warnings : [],
  };
}

/** 后端多基金命中时返回 items，单只时是扁平结构，这里统一成列表。 */
function fundItems(result: FundAnalysisResult): FundAnalysisItem[] {
  if (Array.isArray(result.items) && result.items.length) return result.items;
  return [result];
}

function fundText(item: FundAnalysisItem): string {
  const title = [item.fund_code, item.fund_name].filter(Boolean).join(" ");
  const risk = item.risk_level ? ` · 风险等级 ${item.risk_level}` : "";
  const head = title ? `【${title}】${risk}` : "【基金分析】";
  return [head, item.analysis_text ?? ""].filter(Boolean).join("\n");
}

/**
 * 投顾助手：右下角常驻入口。
 * 悬浮球打开抽屉后可直接对话、调用 Agent 工具、管理草稿。
 *
 * 客户不是必填项：/chat/stream 的 customer_id 可选、另外四个工具接口没有该字段，
 * 后端统一从问题文本里认客户（_resolve_customer_from_query），所以前端不做客户选择，
 * 只在用户没写明客户导致 40001 时给出可操作的提示。
 *
 * 另外 /rebalance/run 是异步受理，草稿要靠轮询 /draft/list 才拿得到。
 */
export function AssistantLauncher() {
  const toast = useToast();
  const [open, setOpen] = useState(false);
  const [tab, setTab] = useState<"chat" | "drafts">("chat");

  /* 会话在「打开抽屉」时才建立（见 openAssistant），关闭时丢弃，不在挂载时就占用上下文 */
  const [sessionId, setSessionId] = useState<string | null>(null);
  const [messages, setMessages] = useState<ChatMessage[]>([]);
  const [input, setInput] = useState("");
  /** streaming = SSE 对话在途；pending = 工具调用 / 草稿轮询在途。 */
  const [streaming, setStreaming] = useState(false);
  const [pending, setPending] = useState(false);
  const busy = streaming || pending;

  const [drafts, setDrafts] = useState<AgentDraft[]>([]);
  const [draftsLoading, setDraftsLoading] = useState(false);
  const [rebalancePending, setRebalancePending] = useState(false);
  const [activeDraft, setActiveDraft] = useState<AgentDraft | null>(null);
  const [draftDraft, setDraftDraft] = useState("");
  const [saving, setSaving] = useState(false);

  const [tableModal, setTableModal] = useState<{
    title: string;
    query: string;
    page: number;
    pageSize: number;
    loading: boolean;
    error: string | null;
    columns: string[];
    rows: Record<string, unknown>[];
    truncated: boolean;
    warnings: string[];
  } | null>(null);

  const abortRef = useRef<AbortController | null>(null);
  const scrollRef = useRef<HTMLDivElement | null>(null);
  const draftsRef = useRef<AgentDraft[]>([]);
  const [elapsed, setElapsed] = useState(0);

  /* 后端是整包输出，等待期间给个计时，避免看起来像卡死 */
  useEffect(() => {
    if (!busy) {
      setElapsed(0);
      return;
    }
    const timer = setInterval(() => setElapsed((value) => value + 1), 1000);
    return () => clearInterval(timer);
  }, [busy]);

  const sessionTag = useMemo(() => (sessionId ? sessionId.slice(-6) : "--------"), [sessionId]);

  /*
   * 投顾 Agent 没有独立的 session/create：后端按 (advisor_id, session_id) 惰性建立上下文，
   * session_id 完全由前端生成，服务端不可能存在它的历史记录，
   * 所以打开抽屉时不再多发一次必然为空的 /session/{id}/history（省一次鉴权往返）。
   * 一旦后端补上会话持久化，再在这里补一次 hydrate 即可。
   */

  const loadDrafts = useCallback(async () => {
    setDraftsLoading(true);
    try {
      /* 不带 customer_id：后端默认返回当前投顾名下的全部草稿 */
      const page = await assistantApi.drafts({ page: 1, page_size: 20 });
      const items = page.items ?? [];
      draftsRef.current = items;
      setDrafts(items);
    } catch {
      /* 草稿列表加载失败不打断对话 */
    } finally {
      setDraftsLoading(false);
    }
  }, []);

  useEffect(() => {
    if (open) void loadDrafts();
  }, [open, loadDrafts]);

  useEffect(() => {
    scrollRef.current?.scrollTo({ top: scrollRef.current.scrollHeight, behavior: "smooth" });
  }, [messages, tab]);

  useEffect(() => () => abortRef.current?.abort(), []);

  const setAssistantMessage = useCallback((id: string, patch: Partial<ChatMessage>) => {
    setMessages((prev) => prev.map((item) => (item.id === id ? { ...item, ...patch } : item)));
  }, []);

  /** 一次「提问 + 回答」入列，返回回答消息 id 便于后续覆盖（工具结果 / 轮询回填）。 */
  const pushExchange = useCallback(
    (query: string, assistant: Omit<ChatMessage, "id" | "role" | "content"> & { content: string }) => {
      const stamp = Date.now();
      const replyId = `a-${stamp}`;
      setMessages((prev) => [
        ...prev,
        { id: `u-${stamp}`, role: "user", content: query },
        { id: replyId, role: "assistant", ...assistant },
      ]);
      return replyId;
    },
    []
  );

  const upsertReply = useCallback((replyId: string, content: string) => {
    setMessages((prev) => {
      if (prev.some((item) => item.id === replyId)) {
        return prev.map((item) => (item.id === replyId ? { ...item, content } : item));
      }
      return [
        ...prev,
        { id: replyId, role: "assistant", content },
      ];
    });
  }, []);

  /* ---------------------------------------------------------------- 对话 */

  const send = useCallback(
    async (raw: string) => {
      const query = raw.trim();
      if (!query || busy) return;

      const replyId = `a-${Date.now()}`;
      setMessages((prev) => [
        ...prev,
        { id: `u-${Date.now()}`, role: "user", content: query },
        { id: replyId, role: "assistant", content: "" },
      ]);
      setInput("");
      setStreaming(true);

      const controller = new AbortController();
      abortRef.current = controller;

      try {
        /* 客户可选：不传 customer_id，后端自己从问题文本里认客户，认不出就走通用问答 */
        const result = await assistantApi.chatOnce(
          { query, session_id: sessionId ?? undefined },
          controller.signal
        );

        const content = result.error || result.text || "助手本次未返回内容。";
        const hint = result.error ? advisorErrorHint(result.error, result.errorCode) : null;
        /* 后端 chat/stream 没有 rebalance 分支，命中调仓类问题会返回未初始化错误，给出换工具的出口 */
        const retryTool =
          result.error && result.error.includes("核心能力尚未初始化")
            ? suggestToolForError(query)
            : undefined;

        setMessages((prev) =>
          prev.map((item) =>
            item.id === replyId
              ? {
                  ...item,
                  content,
                  intent: result.intent,
                  draftId: result.draftId,
                  error: !!result.error,
                  traceId: result.traceId,
                  hint: hint ?? undefined,
                  retryTool,
                  retryQuery: retryTool ? query : undefined,
                }
              : item
          )
        );
        if (result.draftId) void loadDrafts();
      } catch (error) {
        const aborted = (error as Error)?.name === "AbortError";
        if (aborted) {
          /* 取消提问：撤掉占位的助手回复，用户消息保留 */
          setMessages((prev) => prev.filter((item) => item.id !== replyId));
        } else {
          setMessages((prev) =>
            prev.map((item) =>
              item.id === replyId
                ? { ...item, content: errMessage(error, "助手请求失败，请稍后重试"), error: true }
                : item
            )
          );
        }
      } finally {
        setStreaming(false);
        abortRef.current = null;
      }
    },
    [busy, loadDrafts, sessionId]
  );

  /* ---------------------------------------------------------------- 工具 */

  const openTable = useCallback((query: string, snapshot: DataTableSnapshot) => {
    setTableModal({
      title: query.length > 40 ? `${query.slice(0, 40)}…` : query,
      query,
      page: 1,
      pageSize: TABLE_PAGE_SIZE,
      loading: false,
      error: null,
      columns: snapshot.columns,
      rows: snapshot.rows,
      truncated: snapshot.truncated,
      warnings: snapshot.warnings,
    });
  }, []);

  const reloadTable = useCallback(
    async (page: number) => {
      if (!tableModal) return;
      const { query, pageSize } = tableModal;
      setTableModal((prev) => (prev ? { ...prev, page, loading: true, error: null } : prev));
      try {
        const result = await assistantApi.dataQuery({
          query,
          session_id: sessionId ?? undefined,
          page,
          page_size: pageSize,
        });
        setTableModal((prev) =>
          prev
            ? {
                ...prev,
                page,
                loading: false,
                columns: result.columns ?? [],
                rows: result.rows ?? [],
                truncated: !!result.truncated,
                warnings: result.warnings ?? [],
              }
            : prev
        );
      } catch (error) {
        setTableModal((prev) =>
          prev ? { ...prev, loading: false, error: errMessage(error, "分页查询失败") } : prev
        );
      }
    },
    [sessionId, tableModal]
  );

  const runTool = useCallback(
    async (tool: ToolKey, override?: string) => {
      const query = (override ?? input).trim();
      if (!query) {
        toast("请先在输入框描述你的问题", "error");
        return;
      }
      if (tool === "fund-analysis" && !hasFundCode(query)) {
        toast("基金分析需要基金代码，请写完整代码（形如 F000001）", "error");
        return;
      }

      const controller = new AbortController();
      abortRef.current = controller;
      setPending(true);
      /* 气泡里的「换个工具重试」用的是消息自带的问题，不该清掉输入框里正在写的内容 */
      if (!override) setInput("");

      try {
        if (tool === "data-query") {
          const result = await assistantApi.dataQuery({
            query,
            session_id: sessionId ?? undefined,
            page: 1,
            page_size: TABLE_PAGE_SIZE,
          });
          const snapshot = toSnapshot(result);
          pushExchange(query, {
            content: result.answer ?? result.summary ?? "查询完成，无文本摘要。",
            intent: "data_query",
            traceId: result.trace_id,
            table: snapshot,
            tableQuery: query,
          });
        } else if (tool === "fund-analysis") {
          const result = await assistantApi.fundAnalysis(query);
          const items = fundItems(result);
          pushExchange(query, {
            content: items.map(fundText).join("\n\n") || "未返回分析结果。",
            intent: "fund_analysis",
          });
        } else if (tool === "talk-script") {
          const result = await assistantApi.generateTalkScript(query);
          pushExchange(query, {
            content: result.content ?? "未生成话术。",
            intent: "dialogue-script",
            scene: result.scene_type,
          });
        } else {
          /* 调仓是异步受理：先记下已有草稿，再轮询列表等新草稿落库 */
          const baseline = draftsRef.current.map(draftKey).filter(Boolean);
          const result = await assistantApi.runRebalance(query);
          if (!result.accepted) {
            toast("调仓任务未受理", "error");
            return;
          }
          const replyId = pushExchange(query, {
            content: `调仓任务已受理（状态 ${result.status ?? "queued"}），正在后台生成草稿…`,
            intent: "rebalance",
          });
          setRebalancePending(true);
          try {
            const draft = await waitForNewDraft({
              excludeDraftIds: baseline,
              intent: "rebalance",
              timeoutMs: REBALANCE_WAIT_MS,
              signal: controller.signal,
            });
            await loadDrafts();
            if (draft) {
              const id = draftKey(draft);
              upsertReply(
                replyId,
                `调仓草稿已生成：${draft.title || "未命名草稿"}${id ? `（${id}）` : ""}`
              );
              setAssistantMessage(replyId, { draftId: id });
              toast("调仓草稿已生成", "success");
            } else {
              upsertReply(
                replyId,
                "调仓任务仍在后台生成中，可在「草稿」页签点刷新查看，或稍后重试。"
              );
            }
          } catch (error) {
            if ((error as Error)?.name === "AbortError") {
              upsertReply(replyId, "已停止等待，草稿仍会在后台生成，可在「草稿」页签查看。");
            } else {
              throw error;
            }
          } finally {
            setRebalancePending(false);
          }
        }
      } catch (error) {
        if ((error as Error)?.name === "AbortError") {
          /* 主动取消：不打扰 */
        } else {
          /* 工具失败也带「下一步怎么做」，最常见的是问题里没写清客户（40001） */
          const message = errMessage(error, "工具调用失败");
          const code = error instanceof ApiError ? error.code : undefined;
          const hint = advisorErrorHint(message, code);
          toast(hint && !message.includes(hint) ? `${message}（${hint}）` : message, "error");
        }
      } finally {
        setPending(false);
        abortRef.current = null;
      }
    },
    [input, loadDrafts, pushExchange, sessionId, setAssistantMessage, toast, upsertReply]
  );

  /* ---------------------------------------------------------------- 会话 */

  /**
   * 打开抽屉 = 建立会话。投顾侧没有 session/create，session_id 由前端生成，
   * 后端按 (advisor_id, session_id) 惰性建立上下文。
   */
  const openAssistant = useCallback(() => {
    setOpen(true);
    setSessionId((current) => current ?? newSessionId());
  }, []);

  /**
   * 关闭抽屉 = 结束会话：中止生成、清空消息并丢弃上下文。
   * 后端未提供 session/end，结束只能在前端完成（下次打开是新的 session_id）。
   */
  const closeAssistant = useCallback(() => {
    abortRef.current?.abort();
    setOpen(false);
    setMessages([]);
    setInput("");
    setStreaming(false);
    setPending(false);
    setSessionId(null);
  }, []);

  /** 抽屉内「结束会话」：不等关闭，立即换一个全新会话。 */
  const endSession = useCallback(() => {
    abortRef.current?.abort();
    setMessages([]);
    setInput("");
    setStreaming(false);
    setPending(false);
    setSessionId(newSessionId());
    toast("会话已关闭，已开启新的对话上下文", "success");
  }, [toast]);

  /* ---------------------------------------------------------------- 草稿 */

  const openDraft = useCallback(
    async (draftId: string) => {
      try {
        const draft = await assistantApi.draft(draftId);
        setActiveDraft(draft);
        setDraftDraft(draft.content ?? "");
      } catch (error) {
        toast(errMessage(error, "草稿详情加载失败"), "error");
      }
    },
    [toast]
  );

  const saveDraft = useCallback(async () => {
    const draftId = activeDraft?.draft_id ?? activeDraft?.id;
    if (!draftId) return;
    setSaving(true);
    try {
      await assistantApi.saveDraft(draftId, { content: draftDraft });
      toast("草稿已保存", "success");
      setActiveDraft(null);
      await loadDrafts();
    } catch (error) {
      toast(errMessage(error, "保存失败"), "error");
    } finally {
      setSaving(false);
    }
  }, [activeDraft, draftDraft, loadDrafts, toast]);

  const discardDraft = useCallback(
    async (draftId: string) => {
      try {
        await assistantApi.operateDraft(draftId, "discard");
        toast("草稿已废弃", "success");
        await loadDrafts();
      } catch (error) {
        toast(errMessage(error, "废弃失败"), "error");
      }
    },
    [loadDrafts, toast]
  );

  /* ---------------------------------------------------------------- 渲染 */

  const tableHasNext = !!tableModal && tableModal.rows.length >= tableModal.pageSize;

  return (
    <>
      {!open && (
        <button
          onClick={openAssistant}
          aria-label="打开投顾助手"
          className="fixed bottom-6 right-6 z-40 flex h-14 w-14 items-center justify-center rounded-full bg-indigo-600 text-white shadow-lg shadow-indigo-600/30 transition-transform hover:scale-105 hover:bg-indigo-700"
        >
          <Bot className="h-6 w-6" />
          {drafts.length > 0 && (
            <span className="absolute -right-0.5 -top-0.5 flex h-5 min-w-5 items-center justify-center rounded-full bg-red-500 px-1 text-[10px] font-medium text-white">
              {drafts.length > 99 ? "99+" : drafts.length}
            </span>
          )}
        </button>
      )}

      {open && (
        <>
          <div
            className="fixed inset-0 z-40 bg-slate-900/10"
            onClick={closeAssistant}
            aria-hidden
          />
          <aside className="fixed inset-y-0 right-0 z-50 flex w-full max-w-[560px] flex-col bg-white shadow-2xl">
            <header className="flex items-center gap-3 border-b border-slate-200 px-5 py-4">
              <div className="flex h-9 w-9 items-center justify-center rounded-lg bg-indigo-50 text-indigo-600">
                <Bot className="h-5 w-5" />
              </div>
              <div className="min-w-0 flex-1">
                <p className="text-sm font-semibold text-slate-900">投顾助手</p>
                <p className="flex items-center gap-1.5 text-xs text-slate-400">
                  会话 #{sessionTag}
                  {busy && (
                    <span className="flex items-center gap-1 text-indigo-500">
                      <span className="h-1.5 w-1.5 animate-pulse rounded-full bg-indigo-500" />
                      处理中{elapsed > 0 ? ` ${elapsed}s` : ""}
                    </span>
                  )}
                </p>
              </div>
              <Button size="sm" variant="ghost" onClick={endSession} title="结束当前会话并开启新会话">
                <RefreshCw className="h-3.5 w-3.5" />
                结束会话
              </Button>
              <button
                onClick={closeAssistant}
                aria-label="收起助手"
                className="rounded-lg p-2 text-slate-400 transition-colors hover:bg-slate-100 hover:text-slate-600"
              >
                <Minus className="h-4 w-4" />
              </button>
            </header>

            <div className="flex items-center justify-end border-b border-slate-100 px-5 py-2">
              <div className="flex rounded-lg bg-slate-100 p-0.5">
                {(["chat", "drafts"] as const).map((key) => (
                  <button
                    key={key}
                    onClick={() => setTab(key)}
                    className={cn(
                      "rounded-md px-3 py-1.5 text-xs font-medium transition-colors",
                      tab === key ? "bg-white text-slate-900 shadow-sm" : "text-slate-500"
                    )}
                  >
                    {key === "chat" ? "对话" : `草稿${drafts.length ? ` (${drafts.length})` : ""}`}
                  </button>
                ))}
              </div>
            </div>

            {tab === "chat" ? (
              <>
                <div ref={scrollRef} className="flex-1 space-y-4 overflow-y-auto px-5 py-4">
                  {messages.length === 0 && (
                    <div className="flex h-full flex-col items-center justify-center px-6 text-center">
                      <Bot className="mb-3 h-9 w-9 text-slate-300" />
                      <p className="text-sm text-slate-500">
                        我可以帮你查询客户数据、分析基金、生成沟通话术和调仓建议。
                      </p>
                      <p className="mt-2 text-xs text-slate-400">
                        直接对话会自动识别意图；查客户数据、生成调仓方案时，请在问题里写明客户编号或姓名。
                      </p>
                    </div>
                  )}

                  {messages.map((message) => (
                    <div
                      key={message.id}
                      className={cn("flex gap-2.5", message.role === "user" && "flex-row-reverse")}
                    >
                      <div
                        className={cn(
                          "flex h-7 w-7 shrink-0 items-center justify-center rounded-full",
                          message.role === "user"
                            ? "bg-indigo-100 text-indigo-600"
                            : "bg-slate-100 text-slate-500"
                        )}
                      >
                        {message.role === "user" ? (
                          <User className="h-3.5 w-3.5" />
                        ) : (
                          <Bot className="h-3.5 w-3.5" />
                        )}
                      </div>
                      <div
                        className={cn(
                          "min-w-0 max-w-[80%] rounded-xl px-3.5 py-2.5 text-sm leading-6",
                          message.role === "user"
                            ? "bg-indigo-600 text-white"
                            : message.error
                              ? "bg-red-50 text-red-600"
                              : "bg-slate-100 text-slate-700"
                        )}
                      >
                        {message.content ? (
                          <p className="whitespace-pre-wrap break-words">{message.content}</p>
                        ) : (
                          <p className="flex items-center gap-1.5 text-slate-400">
                            <Loader2 className="h-3.5 w-3.5 animate-spin" />
                            助手正在思考{elapsed > 0 ? ` ${elapsed}s` : ""}
                          </p>
                        )}

                        {(message.intent || message.scene) && (
                          <div className="mt-1.5 flex flex-wrap items-center gap-1.5 opacity-80">
                            {message.intent && <Badge tone="info">{intentLabel(message.intent)}</Badge>}
                            {message.scene && <Badge>{sceneLabel(message.scene)}</Badge>}
                          </div>
                        )}

                        {message.table && (
                          <div className="mt-2 overflow-hidden rounded-lg border border-slate-200 bg-white">
                            <div className="max-h-44 overflow-auto">
                              <table className="w-full border-collapse text-xs">
                                <thead className="sticky top-0 bg-slate-50">
                                  <tr>
                                    {message.table.columns.map((column) => (
                                      <th
                                        key={column}
                                        className="whitespace-nowrap px-2 py-1.5 text-left font-medium text-slate-500"
                                      >
                                        {column}
                                      </th>
                                    ))}
                                  </tr>
                                </thead>
                                <tbody className="divide-y divide-slate-100">
                                  {message.table.rows.slice(0, 10).map((row, index) => (
                                    <tr key={index}>
                                      {message.table?.columns.map((column) => (
                                        <td
                                          key={column}
                                          className="whitespace-nowrap px-2 py-1.5 text-slate-600"
                                        >
                                          {cellText(row[column])}
                                        </td>
                                      ))}
                                    </tr>
                                  ))}
                                </tbody>
                              </table>
                            </div>
                            <div className="flex items-center justify-between gap-2 border-t border-slate-100 bg-slate-50 px-2 py-1.5 text-[11px] text-slate-500">
                              <span>
                                本页 {message.table.rows.length} 条
                                {message.table.rows.length > 10 ? "（预览前 10 条）" : ""}
                                {message.table.truncated ? " · 结果被截断" : ""}
                              </span>
                              {message.tableQuery && (
                                <button
                                  onClick={() => openTable(message.tableQuery!, message.table!)}
                                  className="flex items-center gap-1 rounded px-1.5 py-0.5 text-indigo-600 hover:bg-indigo-50"
                                >
                                  <FileText className="h-3 w-3" />
                                  查看数据表
                                </button>
                              )}
                            </div>
                          </div>
                        )}

                        {message.hint && (
                          <p className="mt-1.5 flex items-start gap-1.5 text-xs text-amber-600">
                            <Info className="mt-0.5 h-3 w-3 shrink-0" />
                            {message.hint}
                          </p>
                        )}

                        {message.retryTool && message.retryQuery && (
                          <button
                            disabled={busy}
                            onClick={() => void runTool(message.retryTool!, message.retryQuery)}
                            className="mt-1.5 rounded-md border border-red-200 bg-white px-2 py-1 text-xs text-red-600 transition-colors hover:bg-red-50 disabled:opacity-50"
                          >
                            改用「{QUICK_TOOLS.find((tool) => tool.key === message.retryTool)?.label}」重试
                          </button>
                        )}

                        {message.draftId && (
                          <button
                            onClick={() => void openDraft(message.draftId!)}
                            className="mt-1.5 flex items-center gap-1 rounded-md border border-indigo-200 bg-white px-2 py-1 text-xs text-indigo-600 transition-colors hover:bg-indigo-50"
                          >
                            <FileText className="h-3 w-3" />
                            查看草稿 {message.draftId}
                          </button>
                        )}

                        {message.traceId && (
                          <p className="mt-1 truncate text-[10px] text-slate-400" title={message.traceId}>
                            trace: {message.traceId}
                          </p>
                        )}
                      </div>
                    </div>
                  ))}
                </div>

                <div className="space-y-2.5 border-t border-slate-100 px-5 py-3.5">
                  <div className="flex flex-wrap gap-1.5">
                    {QUICK_TOOLS.map((tool) => (
                      <button
                        key={tool.key}
                        onClick={() => void runTool(tool.key)}
                        disabled={busy}
                        title={tool.hint}
                        className="flex items-center gap-1 rounded-full border border-slate-200 px-2.5 py-1 text-xs text-slate-500 transition-colors hover:border-indigo-300 hover:text-indigo-600 disabled:opacity-50"
                      >
                        <tool.icon className="h-3 w-3" />
                        {tool.label}
                      </button>
                    ))}
                  </div>

                  <div className="flex items-end gap-2">
                    <textarea
                      value={input}
                      disabled={busy}
                      onChange={(event) => setInput(event.target.value)}
                      onKeyDown={(event) => {
                        if (event.key === "Enter" && !event.shiftKey) {
                          event.preventDefault();
                          void send(input);
                        }
                      }}
                      rows={2}
                      placeholder="描述你的问题，回车发送（Shift+Enter 换行）；查客户数据请写明客户编号或姓名"
                      className="max-h-32 flex-1 resize-none rounded-lg border border-slate-200 px-3 py-2 text-sm leading-6 text-slate-700 focus:border-indigo-400 focus:outline-none disabled:bg-slate-50"
                    />
                    {busy ? (
                      <Button
                        variant="danger"
                        onClick={() => abortRef.current?.abort()}
                        aria-label="取消本次请求"
                        title="取消本次请求"
                      >
                        <Square className="h-4 w-4" />
                      </Button>
                    ) : (
                      <Button variant="primary" disabled={!input.trim()} onClick={() => void send(input)}>
                        <Send className="h-4 w-4" />
                      </Button>
                    )}
                  </div>
                </div>
              </>
            ) : (
              <div className="flex-1 overflow-y-auto">
                <div className="flex items-center justify-between px-5 pt-4">
                  <p className="text-xs text-slate-400">
                    助手草稿
                    {rebalancePending && (
                      <span className="ml-2 text-indigo-500">
                        <Loader2 className="mr-1 inline h-3 w-3 animate-spin" />
                        调仓草稿生成中
                      </span>
                    )}
                  </p>
                  <Button size="sm" variant="ghost" onClick={() => void loadDrafts()} disabled={draftsLoading}>
                    <RefreshCw className={cn("h-3.5 w-3.5", draftsLoading && "animate-spin")} />
                    刷新
                  </Button>
                </div>

                {drafts.length === 0 ? (
                  <EmptyState text="暂无 Agent 草稿" />
                ) : (
                  <ul className="mt-2 divide-y divide-slate-100">
                    {drafts.map((draft) => {
                      const id = draftKey(draft);
                      return (
                        <li key={id} className="px-5 py-3">
                          <div className="flex items-start justify-between gap-3">
                            <div className="min-w-0">
                              <p className="truncate text-sm font-medium text-slate-800">
                                {draft.title || "未命名草稿"}
                              </p>
                              <p className="mt-1 line-clamp-2 text-xs leading-5 text-slate-500">
                                {draft.content || "（无正文）"}
                              </p>
                              <div className="mt-2 flex flex-wrap items-center gap-2">
                                {draft.customer_id != null && (
                                  <Badge>客户 #{draft.customer_id}</Badge>
                                )}
                                {draft.intent && (
                                  <Badge tone="info">{intentLabel(draft.intent)}</Badge>
                                )}
                                {draft.status && (
                                  <Badge tone={statusTone(draft.status)}>
                                    {draftStatusLabel(draft.status)}
                                  </Badge>
                                )}
                                <span className="text-xs text-slate-400">
                                  {formatTime(draft.update_time ?? draft.create_time)}
                                </span>
                              </div>
                            </div>
                            <div className="flex shrink-0 gap-1">
                              <Button size="sm" variant="ghost" onClick={() => void openDraft(id)}>
                                编辑
                              </Button>
                              <Button
                                size="sm"
                                variant="ghost"
                                onClick={() => void discardDraft(id)}
                                aria-label="废弃草稿"
                              >
                                <Trash2 className="h-3.5 w-3.5 text-red-500" />
                              </Button>
                            </div>
                          </div>
                        </li>
                      );
                    })}
                  </ul>
                )}
              </div>
            )}
          </aside>
        </>
      )}

      {/* 数据表明细：抽屉太窄，全量结果和翻页放在独立弹层 */}
      {tableModal && (
        <div className="fixed inset-0 z-[60] flex items-center justify-center p-6">
          <div className="absolute inset-0 bg-slate-900/40" onClick={() => setTableModal(null)} aria-hidden />
          <div className="relative z-10 flex max-h-[80vh] w-full max-w-4xl flex-col rounded-xl border border-slate-200 bg-white shadow-xl">
            <header className="flex items-center justify-between border-b border-slate-100 px-5 py-4">
              <div className="min-w-0">
                <h3 className="truncate text-sm font-semibold text-slate-900">查询结果 · {tableModal.title}</h3>
                <p className="mt-0.5 text-xs text-slate-400">
                  共 {tableModal.rows.length} 条
                  {tableModal.truncated ? " · 结果被截断" : ""}
                  {tableModal.warnings.length > 0 ? ` · ${tableModal.warnings.join("、")}` : ""}
                </p>
              </div>
              <button
                onClick={() => setTableModal(null)}
                aria-label="关闭"
                className="rounded p-1 text-slate-400 hover:bg-slate-100"
              >
                <Minus className="h-4 w-4" />
              </button>
            </header>

            <div className="flex-1 overflow-auto px-5 py-4">
              {tableModal.error && (
                <p className="mb-3 flex items-center gap-2 rounded-lg bg-red-50 px-3 py-2 text-xs text-red-600">
                  <AlertCircle className="h-3.5 w-3.5" />
                  {tableModal.error}
                </p>
              )}
              {tableModal.columns.length === 0 ? (
                <EmptyState text="本页没有数据" />
              ) : (
                <div className="overflow-x-auto rounded-lg border border-slate-200">
                  <table className="w-full border-collapse text-xs">
                    <thead className="sticky top-0 bg-slate-50">
                      <tr>
                        {tableModal.columns.map((column) => (
                          <th
                            key={column}
                            className="whitespace-nowrap px-3 py-2 text-left font-medium text-slate-500"
                          >
                            {column}
                          </th>
                        ))}
                      </tr>
                    </thead>
                    <tbody className="divide-y divide-slate-100">
                      {tableModal.rows.map((row, index) => (
                        <tr key={index} className="hover:bg-slate-50">
                          {tableModal.columns.map((column) => (
                            <td key={column} className="whitespace-nowrap px-3 py-2 text-slate-700">
                              {cellText(row[column])}
                            </td>
                          ))}
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              )}
            </div>

            <footer className="flex items-center justify-between border-t border-slate-100 px-5 py-3 text-xs text-slate-500">
              <span className="flex items-center gap-2">
                {tableModal.loading && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
                第 {tableModal.page} 页 · 每页 {tableModal.pageSize} 条
              </span>
              <div className="flex gap-2">
                <Button
                  size="sm"
                  disabled={tableModal.page <= 1 || tableModal.loading}
                  onClick={() => void reloadTable(tableModal.page - 1)}
                >
                  上一页
                </Button>
                <Button
                  size="sm"
                  disabled={!tableHasNext || tableModal.loading}
                  onClick={() => void reloadTable(tableModal.page + 1)}
                >
                  下一页
                </Button>
              </div>
            </footer>
          </div>
        </div>
      )}

      <Modal
        open={!!activeDraft}
        title="编辑草稿"
        onClose={() => setActiveDraft(null)}
        footer={
          <>
            <Button onClick={() => setActiveDraft(null)}>取消</Button>
            <Button variant="primary" loading={saving} onClick={() => void saveDraft()}>
              保存
            </Button>
          </>
        }
      >
        <p className="mb-3 text-xs text-slate-500">
          草稿 ID：{activeDraft?.draft_id ?? activeDraft?.id ?? "--"}
          {activeDraft?.customer_id != null ? ` · 客户 #${activeDraft.customer_id}` : ""}
        </p>
        <textarea
          value={draftDraft}
          onChange={(event) => setDraftDraft(event.target.value)}
          rows={14}
          className="w-full rounded-lg border border-slate-200 px-3 py-2 text-sm leading-6 text-slate-700 focus:border-indigo-400 focus:outline-none"
        />
        <p className="mt-3 flex items-start gap-2 text-xs text-amber-600">
          <AlertCircle className="mt-0.5 h-3.5 w-3.5 shrink-0" />
          保存后会按客户风险等级做合规校验，未通过的修改会被后端拒绝。
        </p>
      </Modal>
    </>
  );
}