"use client";

import { useCallback, useEffect, useState } from "react";
import {
  AlertCircle,
  CircleCheck,
  FlaskConical,
  LoaderCircle,
  Plus,
  Power,
  RefreshCw,
  Save,
  Sparkles,
  Trash2,
  WandSparkles,
} from "lucide-react";
import { toast } from "sonner";

import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Textarea } from "@/components/ui/textarea";
import {
  clearUnconfiguredErrors,
  fetchUnconfiguredErrors,
  summarizeErrorMessage,
  type ErrorMessageRule,
  type UnconfiguredError,
} from "@/lib/api";
import { useSettingsStore } from "../store";

/** 生成一个本地唯一 id：规则还没保存时也要能稳定定位每一行。 */
function nextRuleId(existing: ErrorMessageRule[]): string {
  const used = new Set(existing.map((rule) => rule.id));
  let index = existing.length + 1;
  while (used.has(`rule-${index}`)) {
    index += 1;
  }
  return `rule-${index}`;
}

/** 新生成规则的高亮时长：覆盖「模型返回 6–10 秒 + 用户滚下去看」的整段过程。 */
const HIGHLIGHT_MS = 6000;

/** 多行/逗号分隔的关键词文本 <-> 数组。 */
function keywordsToText(keywords: string[]): string {
  return (keywords || []).join("\n");
}

function textToKeywords(text: string): string[] {
  return text
    .split(/[\n,，、]/)
    .map((keyword) => keyword.trim())
    .filter(Boolean);
}

/** 未命中规则时的兜底文案，和后端 FALLBACK_DISPLAY 保持一致。 */
const FALLBACK_DISPLAY = "操作失败，请稍后重试";

type RuleHit = { rule: ErrorMessageRule; index: number; keyword: string };

type RuleTestResult =
  /** 输入框还是空的。 */
  | { kind: "empty" }
  /** 会被这条规则替换掉（按配置顺序取第一条命中的）。 */
  | { kind: "hit"; first: RuleHit; later: RuleHit[] }
  /** 没有生效的命中：可能命中了停用/缺文案的草稿，也可能一条都没中。 */
  | { kind: "miss"; ignored: RuleHit[] };

function ruleCanMatch(rule: ErrorMessageRule): boolean {
  return rule.enabled !== false && usableKeywords(rule).length > 0 && rule.display.trim() !== "";
}

/** 真正会参与匹配的关键词：后端保存时会把长度 < 2 的丢掉（太短会误伤一片报错）。 */
function usableKeywords(rule: ErrorMessageRule): string[] {
  return (rule.keywords || []).map((item) => item.trim()).filter((item) => item.length >= 2);
}

/** 命中却不会生效的原因（和保存时的归一化口径一致）。 */
function ignoredReason(rule: ErrorMessageRule): string {
  if (rule.enabled === false) {
    return "已停用";
  }
  if (usableKeywords(rule).length === 0) {
    return "关键词太短（少于 2 个字，保存时会被丢弃）";
  }
  return "没填「显示给用户的大白话」";
}

/**
 * 规则测试：复刻后端的匹配口径，答「这条报错会被显示成什么」。
 *
 * ⚠️ 对齐 services/error_message_service.py::ErrorMessageService.translate：
 * 原文包含**任意一个**关键词即命中（不区分大小写）；按配置顺序取**第一条**命中的；
 * 「停用」「关键词太短」「缺文案」（保存时会被归一化丢弃）的规则都不生效，只作提示。
 */
function testRuleMatch(text: string, rules: ErrorMessageRule[]): RuleTestResult {
  const trimmed = text.trim();
  if (!trimmed) {
    return { kind: "empty" };
  }
  const lowered = trimmed.toLowerCase();
  const hits: RuleHit[] = [];
  rules.forEach((rule, index) => {
    const keyword = usableKeywords(rule).find((item) => lowered.includes(item.toLowerCase()));
    if (keyword) {
      hits.push({ rule, index, keyword });
    }
  });
  const active = hits.filter((hit) => ruleCanMatch(hit.rule));
  if (active.length === 0) {
    return { kind: "miss", ignored: hits };
  }
  const [first, ...later] = active;
  return { kind: "hit", first, later };
}

export function ErrorMessageCard() {
  const config = useSettingsStore((state) => state.config);
  const isSaving = useSettingsStore((state) => state.isSavingConfig);
  const setRules = useSettingsStore((state) => state.setErrorMessageRules);
  const setFallbackEnabled = useSettingsStore((state) => state.setErrorMessageFallbackEnabled);
  const setAiModel = useSettingsStore((state) => state.setErrorMessageAiModel);
  const saveConfig = useSettingsStore((state) => state.saveConfig);

  const rules = config?.error_message_rules ?? [];
  const fallbackEnabled = config?.error_message_fallback_enabled === true;
  const aiModel = String(config?.error_message_ai_model ?? "");

  const [unconfigured, setUnconfigured] = useState<UnconfiguredError[]>([]);
  const [loading, setLoading] = useState(false);
  const [clearing, setClearing] = useState(false);
  const [pasteText, setPasteText] = useState("");
  const [summarizing, setSummarizing] = useState(false);
  /** 规则测试：粘一条报错，立刻看到它会显示成什么（含未保存的编辑）。 */
  const [testText, setTestText] = useState("");
  // 匹配本身是几段子串查找，直接算；用 useMemo 反而会被 rules 的字面量依赖拖成每帧重算。
  const testResult = testRuleMatch(testText, rules);
  /** 刚生成的规则 id：滚过去并高亮一下，避免「点了没反应」的错觉。 */
  const [highlightId, setHighlightId] = useState<string | null>(null);
  /** 最近一次「AI 归纳」的结果，直接贴在输入框下面，不用去列表里翻。 */
  const [lastSuggestion, setLastSuggestion] = useState<
    { ruleId: string; keywords: string[]; display: string; source: "ai" | "local"; model?: string } | null
  >(null);

  /** 归纳结果面板直接绑定刚生成的那条规则，可以在面板里就地修改。 */
  const activeRule = lastSuggestion
    ? rules.find((rule) => rule.id === lastSuggestion.ruleId) ?? null
    : null;
  const activeRuleIndex = activeRule ? rules.findIndex((rule) => rule.id === activeRule.id) : -1;

  const loadUnconfigured = useCallback(async (silent = false) => {
    if (!silent) {
      setLoading(true);
    }
    try {
      const data = await fetchUnconfiguredErrors();
      setUnconfigured(data.items || []);
    } catch {
      if (!silent) {
        toast.error("读取未配置报错失败");
      }
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    void loadUnconfigured();
  }, [loadUnconfigured]);

  // 归纳出的规则在输入框下方，页面上很容易滚出视野；这里主动滚过去并高亮。
  // ⚠️ 模型归纳要等 6–10 秒，高亮必须撑到用户滚下去看完，2.8 秒会被完全错过。
  useEffect(() => {
    if (!highlightId) {
      return;
    }
    const node = document.getElementById(`error-rule-${highlightId}`);
    node?.scrollIntoView({ behavior: "smooth", block: "center" });
    const timer = window.setTimeout(() => setHighlightId(null), HIGHLIGHT_MS);
    return () => window.clearTimeout(timer);
  }, [highlightId]);

  const updateRule = (id: string, patch: Partial<ErrorMessageRule>) => {
    setRules(rules.map((rule) => (rule.id === id ? { ...rule, ...patch } : rule)));
  };

  const addRule = (seed?: Partial<ErrorMessageRule>) => {
    const rule: ErrorMessageRule = {
      id: nextRuleId(rules),
      keywords: [],
      display: "",
      enabled: true,
      note: "",
      ...seed,
    };
    setRules([...rules, rule]);
    // 新加的行也滚过去高亮：不管从哪个入口加，都必须看得见。
    setHighlightId(rule.id);
    return rule.id;
  };

  /** 手动把视野拉回某条规则并重新高亮（高亮结束后还能再点一次）。 */
  const focusRule = (id: string) => {
    setHighlightId(null);
    window.setTimeout(() => setHighlightId(id), 30);
  };

  const removeRule = (id: string) => {
    setRules(rules.filter((rule) => rule.id !== id));
  };

  const handleClearUnconfigured = async (fingerprints?: string[]) => {
    setClearing(true);
    try {
      const data = await clearUnconfiguredErrors(fingerprints);
      setUnconfigured(data.items || []);
      toast.success(fingerprints?.length ? "已忽略该条报错" : "已清空未配置报错");
    } catch {
      toast.error("操作失败");
    } finally {
      setClearing(false);
    }
  };

  /**
   * 粘贴一段报错，让模型归纳出关键词 + 大白话，直接追加成一条新规则。
   * 后端保证不硬失败：模型不可用时会退化成「本地抽取关键词」。
   */
  const handleSummarize = async () => {
    const text = pasteText.trim();
    if (!text) {
      toast.error("先把报错原文粘贴进来");
      return;
    }
    setSummarizing(true);
    try {
      const suggestion = await summarizeErrorMessage(text);
      const keywords = suggestion.keywords || [];
      const display = suggestion.display || "";
      if (!keywords.length && !display) {
        toast.error("没能从中归纳出规则，请确认粘贴的是报错原文");
        return;
      }
      const ruleId = addRule({
        keywords,
        display,
        note: suggestion.source === "ai"
          ? `AI 归纳（${suggestion.model || "默认模型"}）`
          : "本地抽取（AI 不可用，请自行补文案）",
      });
      // 结果必须立刻可见：面板里内联出这条规则，可直接改、可直接存（addRule 已负责滚动 + 高亮）。
      setLastSuggestion({
        ruleId,
        keywords,
        display,
        source: suggestion.source,
        model: suggestion.model,
      });
      setPasteText("");
      if (suggestion.source === "ai") {
        const preview = keywords.slice(0, 2).join("、");
        toast.success(`已生成规则：命中「${preview}${keywords.length > 2 ? " 等" : ""}」`);
      } else if (display) {
        toast.warning("AI 不可用，已退化为本地抽取关键词");
      } else {
        toast.warning("AI 不可用，已抽取关键词，请自行填写「显示给用户的大白话」");
      }
    } catch {
      toast.error("归纳失败，请稍后重试");
    } finally {
      setSummarizing(false);
    }
  };

  return (
    <Card className="rounded-2xl border-stone-200 bg-white/90">
      <CardContent className="space-y-6 p-5 sm:p-6">
        <div>
          <h2 className="text-lg font-semibold tracking-tight">报错文案</h2>
          <p className="mt-1 text-sm text-stone-500">
            把上游/后端返回的技术报错翻译成用户看得懂的大白话。只替换前台展示，后台日志仍保留原始报错，方便排查。
          </p>
        </div>

        {/* --------------------------------------------------- 粘贴 + AI 归纳 */}
        <div className="space-y-3 border-t border-stone-100 pt-5">
          <div className="rounded-xl border border-stone-200 bg-stone-50 p-3">
            <div className="flex items-start justify-between gap-3">
              <div>
                <h3 className="flex items-center gap-2 text-sm font-medium text-stone-900">
                  <WandSparkles className="size-4 text-stone-500" />
                  粘贴报错，自动归纳
                </h3>
                <p className="mt-1 text-xs text-stone-500">
                  把后台日志或用户反馈里的原始报错整段粘进来，自动生成关键词和给用户看的大白话。
                </p>
              </div>
              <Button
                className="shrink-0 rounded-xl"
                disabled={summarizing}
                onClick={() => void handleSummarize()}
              >
                {summarizing ? <LoaderCircle className="size-4 animate-spin" /> : <WandSparkles className="size-4" />}
                {summarizing ? "归纳中…" : "AI 归纳"}
              </Button>
            </div>
            <Textarea
              rows={3}
              value={pasteText}
              placeholder={'整段粘贴，例如：\n/backend-api/files failed: status=429, body={"detail": {"code": "throttled", "reason": "upload_protection_limit_exceeded"}}'}
              onChange={(event) => setPasteText(event.target.value)}
              className="mt-3 rounded-xl border-stone-200 bg-white font-mono text-xs"
            />
            <div className="mt-2 flex flex-wrap items-center justify-between gap-2">
              <div className="flex items-center gap-2">
                <span className="whitespace-nowrap text-xs text-stone-500">归纳用模型</span>
                <Input
                  value={aiModel}
                  placeholder="留空 = 池子默认文本模型"
                  onChange={(event) => setAiModel(event.target.value)}
                  className="h-8 w-56 rounded-lg border-stone-200 bg-white text-xs"
                />
              </div>
              {pasteText ? (
                <Button variant="ghost" size="sm" className="rounded-lg" onClick={() => setPasteText("")}>
                  清空
                </Button>
              ) : null}
            </div>
            {summarizing ? (
              <p className="mt-2 text-xs text-stone-500">正在调用模型归纳，通常需要 5–10 秒…</p>
            ) : null}
            {lastSuggestion && activeRule ? (
              <div className="mt-3 rounded-xl border border-emerald-300 bg-emerald-50 p-3 text-xs text-emerald-900">
                <div className="flex items-start justify-between gap-2">
                  <span className="flex items-center gap-1.5 font-medium">
                    <Sparkles className="size-3.5" />
                    {lastSuggestion.source === "ai"
                      ? `已归纳出规则（${lastSuggestion.model || "默认模型"}）`
                      : "AI 不可用，已用本地规则抽取关键词"}
                  </span>
                  <button
                    type="button"
                    className="shrink-0 text-emerald-700 hover:underline"
                    onClick={() => setLastSuggestion(null)}
                  >
                    收起
                  </button>
                </div>

                {/* 就地可改：这里改的就是列表里的那条规则，不用去下面找。 */}
                <div className="mt-3 grid gap-3 md:grid-cols-[1fr_1fr]">
                  <div className="space-y-1.5">
                    <span className="font-medium text-emerald-800">关键词（每行一个）</span>
                    <Textarea
                      rows={3}
                      value={keywordsToText(activeRule.keywords)}
                      onChange={(event) => updateRule(activeRule.id, { keywords: textToKeywords(event.target.value) })}
                      className="rounded-lg border-emerald-200 bg-white font-mono text-xs"
                    />
                  </div>
                  <div className="space-y-1.5">
                    <span className="font-medium text-emerald-800">显示给用户的大白话</span>
                    <Textarea
                      rows={3}
                      value={activeRule.display}
                      onChange={(event) => updateRule(activeRule.id, { display: event.target.value })}
                      className="rounded-lg border-emerald-200 bg-white text-xs"
                    />
                  </div>
                </div>

                <div className="mt-3 flex flex-wrap items-center justify-between gap-2">
                  <span className="text-emerald-800">
                    已在下方「匹配规则」<b>第 {activeRuleIndex + 1} 条</b>（共 {rules.length} 条），并高亮{" "}
                    {HIGHLIGHT_MS / 1000} 秒。
                  </span>
                  <div className="flex items-center gap-2">
                    <Button
                      variant="outline"
                      size="sm"
                      className="rounded-lg"
                      onClick={() => focusRule(activeRule.id)}
                    >
                      滚到列表查看
                    </Button>
                    <Button
                      size="sm"
                      className="rounded-lg"
                      disabled={isSaving}
                      onClick={() => void saveConfig()}
                    >
                      {isSaving ? <LoaderCircle className="size-3.5 animate-spin" /> : <Save className="size-3.5" />}
                      保存设置
                    </Button>
                  </div>
                </div>
                <p className="mt-2 text-emerald-700">
                  确认无误后点「保存设置」才会真正生效；不保存的话刷新页面就丢了。
                </p>
              </div>
            ) : null}
            {lastSuggestion && !activeRule ? (
              <div className="mt-3 rounded-xl border border-amber-200 bg-amber-50 p-3 text-xs text-amber-800">
                刚才归纳出的那条规则已经被删掉了。
                <button
                  type="button"
                  className="ml-2 text-amber-700 underline"
                  onClick={() => setLastSuggestion(null)}
                >
                  知道了
                </button>
              </div>
            ) : null}
          </div>
        </div>

        {/* --------------------------------------------------------- 规则测试 */}
        <div className="space-y-3 border-t border-stone-100 pt-5">
          <div className="flex items-start justify-between gap-3">
            <div>
              <h3 className="flex items-center gap-2 font-medium text-stone-900">
                <FlaskConical className="size-4 text-stone-500" />
                规则测试
              </h3>
              <p className="mt-1 text-xs text-stone-500">
                把一条报错原文粘进来，立刻看到它会不会命中、命中哪条、前台最终显示什么。测的是<b>当前编辑中的规则</b>（没保存也算），不用点按钮。
              </p>
            </div>
            {testText ? (
              <Button variant="ghost" size="sm" className="shrink-0 rounded-lg" onClick={() => setTestText("")}>
                清空
              </Button>
            ) : null}
          </div>
          <Textarea
            rows={3}
            value={testText}
            placeholder={'整段粘贴报错，例如：\n你已达到 Free 套餐的图像生成请求上限。上限将在 23小时 后重置，届时可创建更多图像。'}
            onChange={(event) => setTestText(event.target.value)}
            className="rounded-xl border-stone-200 bg-white font-mono text-xs"
          />

          {testResult.kind === "empty" ? (
            <div className="rounded-xl border border-dashed border-stone-200 bg-stone-50 px-4 py-4 text-xs text-stone-500">
              未命中规则的报错会进下面的「未配置报错」待办；这里可以先试一行，确认规则写得够准。
            </div>
          ) : null}

          {testResult.kind === "hit" ? (
            <div className="space-y-2 rounded-xl border border-emerald-300 bg-emerald-50 p-3 text-xs text-emerald-900">
              <div className="flex items-center gap-1.5 font-medium">
                <CircleCheck className="size-3.5" />
                命中规则，前台会显示：
              </div>
              <div className="rounded-lg bg-white px-3 py-2 text-sm text-stone-900">
                {testResult.first.rule.display}
              </div>
              <p>
                命中第 <b>{testResult.first.index + 1}</b> 条（关键词「{testResult.first.keyword}」）
                {testResult.later.length > 0
                  ? `；第 ${testResult.later.map((hit) => hit.index + 1).join("、")} 条也会命中，但按顺序只取第一条，它们不会生效。`
                  : "。"}
              </p>
              <p className="text-emerald-700">改完记得点最下方「保存设置」，否则刷新页面就丢了。</p>
            </div>
          ) : null}

          {testResult.kind === "miss" ? (
            <div className="space-y-2 rounded-xl border border-amber-300 bg-amber-50 p-3 text-xs text-amber-900">
              <div className="flex items-center gap-1.5 font-medium">
                <AlertCircle className="size-3.5" />
                没有规则会命中，前台会{fallbackEnabled ? "显示兜底文案：" : "原样显示这条技术报错："}
              </div>
              <div className="break-all rounded-lg bg-white px-3 py-2 font-mono text-[11px] text-stone-700">
                {fallbackEnabled ? FALLBACK_DISPLAY : testText.trim()}
              </div>
              {testResult.ignored.length > 0 ? (
                <div className="space-y-1.5">
                  {testResult.ignored.map((hit) => (
                    <div
                      key={hit.rule.id}
                      className="flex flex-wrap items-center justify-between gap-2 rounded-lg border border-amber-200 bg-white/70 px-2 py-1.5"
                    >
                      <span>
                        第 <b>{hit.index + 1}</b> 条命中了关键词「{hit.keyword}」，但
                        {ignoredReason(hit.rule)}，实际不生效。
                      </span>
                      <span className="flex items-center gap-1.5">
                        {hit.rule.enabled === false ? (
                          <Button
                            variant="outline"
                            size="sm"
                            className="h-7 rounded-lg px-2 text-xs"
                            onClick={() => updateRule(hit.rule.id, { enabled: true })}
                          >
                            <Power className="size-3" />
                            启用这条
                          </Button>
                        ) : null}
                        <Button
                          variant="outline"
                          size="sm"
                          className="h-7 rounded-lg px-2 text-xs"
                          onClick={() => focusRule(hit.rule.id)}
                        >
                          去改这条
                        </Button>
                      </span>
                    </div>
                  ))}
                </div>
              ) : null}
              <p className="text-amber-800">
                要让它有话说：把这段报错粘到上面的「AI 归纳」生成一条规则，或手动加规则填关键词。
              </p>
            </div>
          ) : null}
        </div>

        {/* --------------------------------------------------------- 规则列表 */}
        <div className="space-y-3 border-t border-stone-100 pt-5">
          <div className="flex items-start justify-between gap-3">
            <div>
              <h3 className="font-medium text-stone-900">匹配规则</h3>
              <p className="mt-1 text-xs text-stone-500">
                报错原文包含<b>任意一个</b>关键词即命中（不区分大小写），命中后前台显示右边的大白话。多个关键词一行一个 —— <b>关键词越多，规则越宽</b>，不要写太通用的词（如 /backend-api/files、status=500 单独出现时会误伤其它报错）。
              </p>
            </div>
            <Button variant="outline" className="shrink-0 rounded-xl" onClick={() => addRule()}>
              <Plus className="size-4" />
              添加规则
            </Button>
          </div>

          {rules.length === 0 ? (
            <div className="rounded-xl border border-dashed border-stone-200 bg-stone-50 px-4 py-8 text-center text-sm text-stone-500">
              还没有任何规则。可以把报错粘到上面的框里点「AI 归纳」自动生成，或点右上角「添加规则」手动填。
              <br />
              未命中的报错会原样显示，并出现在下方「未配置报错」里。
            </div>
          ) : (
            <div className="space-y-3">
              {rules.map((rule) => {
                const keywordCount = rule.keywords.length;
                const invalid = keywordCount === 0 || !rule.display.trim();
                const highlighted = highlightId === rule.id;
                return (
                  <div
                    key={rule.id}
                    id={`error-rule-${rule.id}`}
                    className={`rounded-xl border p-3 transition-all ${
                      highlighted
                        ? "border-emerald-400 bg-emerald-50 shadow-md ring-2 ring-emerald-300"
                        : "border-stone-200 bg-stone-50"
                    }`}
                  >
                    {highlighted ? (
                      <div className="mb-2 flex items-center gap-2">
                        <span className="inline-flex items-center gap-1 rounded-full bg-emerald-600 px-2 py-0.5 text-xs font-medium text-white">
                          <Sparkles className="size-3" />
                          刚生成，还没保存
                        </span>
                        <button
                          type="button"
                          className="text-xs text-emerald-700 hover:underline"
                          onClick={() => setHighlightId(null)}
                        >
                          取消高亮
                        </button>
                      </div>
                    ) : null}
                    <div className="grid gap-3 md:grid-cols-[1fr_1fr]">
                      <div className="space-y-1.5">
                        <label className="text-xs font-medium text-stone-600">
                          关键词{keywordCount > 0 ? `（${keywordCount}）` : ""}
                        </label>
                        <Textarea
                          rows={3}
                          value={keywordsToText(rule.keywords)}
                          placeholder={"每行一个，例如：\nstatus=429\nupload_protection_limit_exceeded"}
                          onChange={(event) => updateRule(rule.id, { keywords: textToKeywords(event.target.value) })}
                          className="rounded-xl border-stone-200 bg-white text-sm"
                        />
                      </div>
                      <div className="space-y-1.5">
                        <label className="text-xs font-medium text-stone-600">显示给用户的大白话</label>
                        <Textarea
                          rows={3}
                          value={rule.display}
                          placeholder="例如：当前上传人数较多，请稍后重试"
                          onChange={(event) => updateRule(rule.id, { display: event.target.value })}
                          className="rounded-xl border-stone-200 bg-white text-sm"
                        />
                      </div>
                    </div>
                    <div className="mt-2 flex items-center justify-between gap-3">
                      <label className="flex items-center gap-2 text-sm text-stone-600">
                        <input
                          type="checkbox"
                          checked={rule.enabled}
                          onChange={(event) => updateRule(rule.id, { enabled: event.target.checked })}
                        />
                        启用
                      </label>
                      <div className="flex items-center gap-3">
                        {invalid ? (
                          <span className="text-xs text-amber-600">缺关键词或文案，保存时会被丢弃</span>
                        ) : null}
                        <Button
                          variant="ghost"
                          size="icon"
                          title="删除该规则"
                          onClick={() => removeRule(rule.id)}
                        >
                          <Trash2 className="size-4 text-stone-500" />
                        </Button>
                      </div>
                    </div>
                  </div>
                );
              })}
            </div>
          )}
        </div>

        {/* --------------------------------------------------------- 兜底开关 */}
        <div className="space-y-3 border-t border-stone-100 pt-5">
          <label className="flex items-start gap-3">
            <input
              type="checkbox"
              className="mt-1"
              checked={fallbackEnabled}
              onChange={(event) => setFallbackEnabled(event.target.checked)}
            />
            <span>
              <span className="text-sm font-medium text-stone-900">未匹配时报错也兜底成通用文案</span>
              <span className="mt-1 block text-xs text-stone-500">
                勾选后，未命中规则的报错前台统一显示「操作失败，请稍后重试」。不勾选则原样显示技术报错（默认，便于你先补规则）。
              </span>
            </span>
          </label>
        </div>

        {/* ------------------------------------------------------- 未配置报错 */}
        <div className="space-y-3 border-t border-stone-100 pt-5">
          <div className="flex items-start justify-between gap-3">
            <div>
              <h3 className="flex items-center gap-2 font-medium text-stone-900">
                <AlertCircle className="size-4 text-amber-500" />
                未配置报错
                {unconfigured.length > 0 ? (
                  <span className="rounded-full bg-amber-100 px-2 py-0.5 text-xs font-medium text-amber-700">
                    {unconfigured.length}
                  </span>
                ) : null}
              </h3>
              <p className="mt-1 text-xs text-stone-500">
                自动收集还匹配不到规则的报错。照着补一条规则，前台就再也看不到这些代码了。
              </p>
            </div>
            <div className="flex shrink-0 items-center gap-2">
              <Button
                variant="outline"
                size="icon"
                className="rounded-xl"
                title="刷新"
                disabled={loading}
                onClick={() => void loadUnconfigured()}
              >
                {loading ? <LoaderCircle className="size-4 animate-spin" /> : <RefreshCw className="size-4" />}
              </Button>
              <Button
                variant="outline"
                className="rounded-xl"
                disabled={clearing || unconfigured.length === 0}
                onClick={() => void handleClearUnconfigured()}
              >
                <Trash2 className="size-4" />
                全部忽略
              </Button>
            </div>
          </div>

          {unconfigured.length === 0 ? (
            <div className="rounded-xl border border-dashed border-stone-200 bg-stone-50 px-4 py-6 text-center text-sm text-stone-500">
              {loading ? "读取中…" : "暂无未配置报错，规则已覆盖当前所有报错。"}
            </div>
          ) : (
            <div className="space-y-2">
              {unconfigured.map((item) => (
                <div
                  key={item.fingerprint}
                  className="rounded-xl border border-stone-200 bg-stone-50 p-3"
                >
                  <div className="flex items-start justify-between gap-3">
                    <div className="min-w-0 flex-1">
                      <div className="flex flex-wrap items-center gap-2 text-xs text-stone-500">
                        <span className="rounded-full bg-stone-200 px-2 py-0.5 font-medium text-stone-700">
                          出现 {item.count} 次
                        </span>
                        {item.channel ? <span>来源：{item.channel}</span> : null}
                        {item.last_seen ? <span>最近：{item.last_seen}</span> : null}
                      </div>
                      <pre className="mt-2 max-h-32 overflow-auto whitespace-pre-wrap break-all rounded-lg bg-white p-2 text-xs text-stone-600">
                        {item.sample}
                      </pre>
                    </div>
                  </div>
                  <div className="mt-2 flex items-center justify-end gap-2">
                    <Button
                      variant="outline"
                      className="rounded-xl"
                      onClick={() =>
                        addRule({
                          // 后端已从这段报错里抽好候选关键词；抽不到才退回原文片段。
                          keywords: item.keywords?.length ? item.keywords : [item.sample.slice(0, 60)],
                          note: `来自未配置报错 ${item.fingerprint}`,
                        })
                      }
                    >
                      <Sparkles className="size-4" />
                      以此为模板新建规则
                    </Button>
                    <Button
                      variant="ghost"
                      size="icon"
                      title="忽略该条"
                      disabled={clearing}
                      onClick={() => void handleClearUnconfigured([item.fingerprint])}
                    >
                      <Trash2 className="size-4 text-stone-500" />
                    </Button>
                  </div>
                </div>
              ))}
            </div>
          )}
        </div>

        {/* ----------------------------------------------------------- 保存 */}
        <div className="flex items-center justify-between gap-3 border-t border-stone-100 pt-5">
          <p className="text-xs text-stone-500">
            共 {rules.length} 条规则，其中 {rules.filter((rule) => rule.enabled).length} 条已启用。
          </p>
          <Button
            className="rounded-xl"
            disabled={isSaving}
            onClick={() => void saveConfig()}
          >
            {isSaving ? <LoaderCircle className="size-4 animate-spin" /> : <Save className="size-4" />}
            保存设置
          </Button>
        </div>
      </CardContent>
    </Card>
  );
}