"use client";

import {
  useCallback,
  useEffect,
  useRef,
  useState,
  type CSSProperties,
  type ReactNode,
} from "react";
import Link from "next/link";
import {
  Check,
  FileText,
  FolderOpen,
  History,
  Loader2,
  MessagesSquare,
  RotateCcw,
  Trash2,
  X,
} from "lucide-react";
import {
  apiAdminContentCounts,
  apiAdminContentPosts,
  apiAdminContentComments,
  apiAdminSoftDeletePost,
  apiAdminRestorePost,
  apiAdminPurgePost,
  apiAdminSoftDeleteComment,
  apiAdminRestoreComment,
  apiAdminPurgeComment,
  apiAdminApprovePost,
  apiAdminRejectPost,
  apiAdminApproveComment,
  apiAdminRejectComment,
  apiUpdateSiteSettings,
  type AdminContentComment,
  type AdminContentCounts,
  type AdminContentPost,
  type AdminContentStatus,
  type PublicSettings,
} from "@/lib/api";
import { canModerateAuthor } from "@/lib/roles";
import { formatRelative } from "@/lib/format";
import { toast } from "@/lib/toast";
import { realtime, RT_MODERATION_CHANGED } from "@/lib/realtime";
import Avatar from "@/components/Avatar";
import AutolinkText from "@/components/AutolinkText";
import ConfirmDialog from "@/components/ConfirmDialog";
import StaffDeletePostModal from "@/components/StaffDeletePostModal";
import DeleteCommentModal from "@/components/DeleteCommentModal";
import CommentEditHistoryModal from "@/components/CommentEditHistoryModal";
import {
  AdminEmpty,
  AdminPageHeader,
  AdminPager,
  AdminSearchField,
  AdminSegmented,
  AdminStatusChip,
  AdminStepper,
  AdminSwitch,
  contentStatusChip,
} from "@/components/admin";

const PAGE_SIZE = 15;
const CLAMP_TOGGLE_CHARS = 90;

export type ContentKind = "posts" | "comments";

const STATUS_TABS: { key: AdminContentStatus; label: string }[] = [
  { key: "live", label: "全部" },
  { key: "published", label: "发布" },
  { key: "pending", label: "待审" },
  { key: "rejected", label: "拒绝" },
  { key: "deleted", label: "删除" },
];

/** 评论摘要：去 Markdown 标记，保留换行供 ClampText 判断 */
function commentPlain(md: string): string {
  return md
    .replace(/```[\s\S]*?```/g, " ")
    .replace(/[#>*_`~\-]/g, "")
    .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1")
    .replace(/[ \t]+\n/g, "\n")
    .replace(/\n{3,}/g, "\n\n")
    .replace(/[ \t]{2,}/g, " ")
    .trim();
}

function needsClampToggle(text: string): boolean {
  if (text.length > CLAMP_TOGGLE_CHARS) return true;
  const newlines = (text.match(/\n/g) || []).length;
  return newlines >= 2;
}

function ClampText({
  text,
  className = "",
  style,
}: {
  text: string;
  className?: string;
  style?: CSSProperties;
}) {
  const [open, setOpen] = useState(false);
  const showToggle = needsClampToggle(text);
  const body = text || "（空）";
  return (
    <div className={className}>
      <p
        className={`text-[12.5px] leading-relaxed whitespace-pre-wrap break-words admin-content-clamp${open ? " is-open" : ""}`}
        style={style}
        {...(showToggle ? { "data-expandable": "" } : {})}
      >
        <AutolinkText text={body} />
      </p>
      {showToggle ? (
        <button
          type="button"
          className="meta text-[11.5px] mt-0.5 hover:underline"
          style={{ color: "var(--accent)" }}
          onClick={() => setOpen((v) => !v)}
        >
          {open ? "收起" : "展开"}
        </button>
      ) : null}
    </div>
  );
}

function ContentAction({
  label,
  icon,
  onClick,
  disabled,
  danger,
  ok,
}: {
  label: string;
  icon: ReactNode;
  onClick: () => void;
  disabled?: boolean;
  danger?: boolean;
  ok?: boolean;
}) {
  const tone = danger ? " is-danger" : ok ? " is-ok" : "";
  return (
    <button
      type="button"
      className={`admin-content-action${tone}`}
      disabled={disabled}
      onClick={onClick}
    >
      {icon}
      {label}
    </button>
  );
}

function isPendingRow(status: string, deleted: boolean) {
  return !deleted && status === "pending";
}

function PendingActions({
  busy,
  onApprove,
  onReject,
}: {
  busy: boolean;
  onApprove: () => void;
  onReject: () => void;
}) {
  return (
    <>
      <button type="button" className="btn btn-sm btn-ok" disabled={busy} onClick={onApprove}>
        {busy ? <Loader2 size={13} className="animate-spin" /> : <Check size={13} />}
        通过
      </button>
      <button type="button" className="btn btn-sm btn-danger" disabled={busy} onClick={onReject}>
        <X size={13} /> 拒绝
      </button>
    </>
  );
}

/** 策略项：标题、控件与保存按钮成组换行，不拆散单项 */
function PolicyChip({
  title,
  hint,
  control,
  instant,
}: {
  title: string;
  hint?: string;
  control: ReactNode;
  instant?: boolean;
}) {
  return (
    <div className="admin-content-policy-chip" data-tip={hint || undefined}>
      <span className="admin-content-policy-chip-copy">
        <span className="admin-content-policy-chip-label">{title}</span>
        {instant ? <span className="admin-content-policy-chip-how">立即生效</span> : null}
      </span>
      <div className="admin-content-policy-chip-ctrl shrink-0 flex items-center gap-1.5">{control}</div>
    </div>
  );
}

function ColumnShell({
  icon,
  title,
  count,
  pending,
  toolbar,
  body,
  pager,
  className = "",
}: {
  icon: ReactNode;
  title: string;
  count?: number;
  pending?: number;
  toolbar?: ReactNode;
  body: ReactNode;
  pager?: ReactNode;
  className?: string;
}) {
  return (
    <section className={`panel admin-content-col ${className}`.trim()}>
      <header
        className="admin-content-col-head flex items-center gap-2 px-3.5 sm:px-4 py-3"
        style={{ borderBottom: "1px solid var(--line)", background: "var(--panel-2)" }}
      >
        <span className="shrink-0" style={{ color: "var(--accent)" }} aria-hidden>
          {icon}
        </span>
        <h2 className="text-[14px] font-semibold truncate" style={{ color: "var(--ink)" }}>
          {title}
        </h2>
        {typeof count === "number" ? (
          <span className="meta text-[12px] tabular-nums shrink-0">{count}</span>
        ) : null}
        {pending && pending > 0 ? (
          <span className="admin-status is-warn shrink-0" data-tip={`${pending} 条待审`}>
            {pending}
          </span>
        ) : null}
      </header>
      {toolbar}
      <div className="admin-content-col-body">{body}</div>
      {pager}
    </section>
  );
}

function statusCountFor(
  kind: "posts" | "comments",
  st: AdminContentStatus,
  counts: AdminContentCounts
): number | null {
  if (kind === "posts") {
    if (st === "live") return counts.posts_live;
    if (st === "pending") return counts.posts_pending;
    if (st === "rejected") return counts.posts_rejected;
    if (st === "deleted") return counts.posts_deleted;
    if (st === "published") {
      return Math.max(0, counts.posts_live - counts.posts_pending - counts.posts_rejected);
    }
    return null;
  }
  if (st === "live") return counts.comments_live;
  if (st === "pending") return counts.comments_pending;
  if (st === "rejected") return counts.comments_rejected;
  if (st === "deleted") return counts.comments_deleted;
  if (st === "published") {
    return Math.max(0, counts.comments_live - counts.comments_pending - counts.comments_rejected);
  }
  return null;
}

const pagerClass = "admin-content-col-pager px-3 sm:px-3.5";

export default function ContentAdmin({
  initialKind,
  initialStatus,
  initialPosts,
  initialPostsTotal,
  initialComments,
  initialCommentsTotal,
  initialCounts,
  initError,
  canConfigureSettings,
  canPurge,
  viewerRole,
  initialSettings,
}: {
  initialKind: ContentKind;
  initialStatus: AdminContentStatus;
  initialPosts: AdminContentPost[];
  initialPostsTotal: number;
  initialComments: AdminContentComment[];
  initialCommentsTotal: number;
  initialCounts: AdminContentCounts;
  initError: string;
  canConfigureSettings: boolean;
  canPurge: boolean;
  viewerRole: string;
  initialSettings: PublicSettings;
}) {
  // 窄屏分段：lg 以下只显示一栏；PC 双栏同时可见
  const [mobileKind, setMobileKind] = useState<ContentKind>(initialKind);
  const [counts, setCounts] = useState(initialCounts);

  const [posts, setPosts] = useState(initialPosts);
  const [postsTotal, setPostsTotal] = useState(initialPostsTotal);
  const [postsPage, setPostsPage] = useState(1);
  const [postsStatus, setPostsStatus] = useState<AdminContentStatus>(initialStatus);
  const [postsKeyword, setPostsKeyword] = useState("");
  const [postsQ, setPostsQ] = useState("");
  const [postsLoading, setPostsLoading] = useState(false);
  const [postsError, setPostsError] = useState(
    initError && initialKind === "posts" ? initError : ""
  );
  const postsSeq = useRef(0);

  const [comments, setComments] = useState(initialComments);
  const [commentsTotal, setCommentsTotal] = useState(initialCommentsTotal);
  const [commentsPage, setCommentsPage] = useState(1);
  const [commentsStatus, setCommentsStatus] = useState<AdminContentStatus>(initialStatus);
  const [commentsKeyword, setCommentsKeyword] = useState("");
  const [commentsQ, setCommentsQ] = useState("");
  const [commentsLoading, setCommentsLoading] = useState(false);
  const [commentsError, setCommentsError] = useState(
    initError && initialKind === "comments" ? initError : ""
  );
  const commentsSeq = useRef(0);

  const [actingKey, setActingKey] = useState<string | null>(null);

  const [trustOn, setTrustOn] = useState(initialSettings.trust_reviewed_publish);
  const [cooldown, setCooldown] = useState(initialSettings.post_cooldown_hours);
  const [postLinkNewTab, setPostLinkNewTab] = useState(initialSettings.post_link_new_tab !== false);
  const [savingPolicy, setSavingPolicy] = useState(false);

  const [confirm, setConfirm] = useState<{
    title: string;
    message: string;
    danger?: boolean;
    confirmLabel?: string;
    run: () => Promise<void>;
  } | null>(null);
  const [confirmBusy, setConfirmBusy] = useState(false);
  const [staffDeletePost, setStaffDeletePost] = useState<AdminContentPost | null>(null);
  const [staffDeleteBusy, setStaffDeleteBusy] = useState(false);
  const [staffDeleteComment, setStaffDeleteComment] = useState<AdminContentComment | null>(null);
  const [staffDeleteCommentBusy, setStaffDeleteCommentBusy] = useState(false);
  const [historyCommentId, setHistoryCommentId] = useState<number | null>(null);

  const refreshCounts = useCallback(() => {
    apiAdminContentCounts().then(setCounts).catch(() => {});
  }, []);

  const loadPosts = useCallback(async (page: number, st: AdminContentStatus, q: string) => {
    const seq = ++postsSeq.current;
    setPostsLoading(true);
    try {
      const res = await apiAdminContentPosts(page, st, q);
      if (seq !== postsSeq.current) return;
      setPosts(res.posts);
      setPostsTotal(res.total);
      setPostsPage(page);
      setPostsStatus(st);
      setPostsQ(q);
      setPostsError("");
    } catch (e) {
      if (seq !== postsSeq.current) return;
      setPostsError(e instanceof Error ? e.message : "获取帖子失败");
    } finally {
      if (seq === postsSeq.current) setPostsLoading(false);
    }
  }, []);

  const loadComments = useCallback(async (page: number, st: AdminContentStatus, q: string) => {
    const seq = ++commentsSeq.current;
    setCommentsLoading(true);
    try {
      const res = await apiAdminContentComments(page, st, q);
      if (seq !== commentsSeq.current) return;
      setComments(res.comments);
      setCommentsTotal(res.total);
      setCommentsPage(page);
      setCommentsStatus(st);
      setCommentsQ(q);
      setCommentsError("");
    } catch (e) {
      if (seq !== commentsSeq.current) return;
      setCommentsError(e instanceof Error ? e.message : "获取评论失败");
    } finally {
      if (seq === commentsSeq.current) setCommentsLoading(false);
    }
  }, []);

  useEffect(() => {
    refreshCounts();
  }, [refreshCounts]);

  useEffect(() => {
    const off = realtime.on(RT_MODERATION_CHANGED, refreshCounts);
    return off;
  }, [refreshCounts]);

  const reloadPosts = (page?: number) => {
    const p = page ?? postsPage;
    const len = posts.length;
    void loadPosts(len <= 1 && p > 1 && page === undefined ? p - 1 : p, postsStatus, postsQ);
    refreshCounts();
  };

  const reloadComments = (page?: number) => {
    const p = page ?? commentsPage;
    const len = comments.length;
    void loadComments(
      len <= 1 && p > 1 && page === undefined ? p - 1 : p,
      commentsStatus,
      commentsQ
    );
    refreshCounts();
  };

  const runAction = (key: string, fn: () => Promise<void>, okMsg: string, after: () => void) => {
    setActingKey(key);
    fn()
      .then(() => {
        toast(okMsg, "ok");
        after();
      })
      .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
      .finally(() => setActingKey(null));
  };

  const askConfirm = (
    title: string,
    message: string,
    run: () => Promise<void>,
    danger = false,
    confirmLabel?: string
  ) => setConfirm({ title, message, run, danger, confirmLabel });

  const askReject = (kindNow: "posts" | "comments", id: number) => {
    askConfirm(
      kindNow === "posts" ? "拒绝这篇帖子？" : "拒绝这条评论？",
      "拒绝后作者将收到通知，内容不会公开。",
      async () => {
        if (kindNow === "posts") await apiAdminRejectPost(id);
        else await apiAdminRejectComment(id);
        toast("已拒绝，作者将收到通知", "ok");
        if (kindNow === "posts") reloadPosts();
        else reloadComments();
      },
      true,
      "确认拒绝"
    );
  };

  const toggleTrust = async () => {
    if (!canConfigureSettings || savingPolicy) return;
    setSavingPolicy(true);
    try {
      const res = await apiUpdateSiteSettings({ trust_reviewed_publish: !trustOn });
      setTrustOn(res.trust_reviewed_publish);
      toast(
        res.trust_reviewed_publish
          ? "已开启过审免审（帖子与评论）"
          : "已关闭过审免审（帖子与评论将按规则待审）",
        "ok"
      );
    } catch (e) {
      toast(e instanceof Error ? e.message : "保存失败");
    } finally {
      setSavingPolicy(false);
    }
  };

  const saveCooldown = async () => {
    if (!canConfigureSettings || savingPolicy) return;
    const n = Math.max(0, Math.min(168, Math.round(Number(cooldown)) || 0));
    setSavingPolicy(true);
    try {
      const res = await apiUpdateSiteSettings({ post_cooldown_hours: n });
      setCooldown(res.post_cooldown_hours);
      toast(
        res.post_cooldown_hours === 0
          ? "已关闭新用户发帖冷静期"
          : `新用户发帖冷静期已设为 ${res.post_cooldown_hours} 小时（评论与聊天不受限）`,
        "ok"
      );
    } catch (e) {
      toast(e instanceof Error ? e.message : "保存失败");
    } finally {
      setSavingPolicy(false);
    }
  };

  const togglePostLinkNewTab = async () => {
    if (!canConfigureSettings || savingPolicy) return;
    const next = !postLinkNewTab;
    setSavingPolicy(true);
    try {
      const res = await apiUpdateSiteSettings({ post_link_new_tab: next });
      setPostLinkNewTab(res.post_link_new_tab !== false);
      toast(
        res.post_link_new_tab !== false
          ? "帖子与评论外链将在新标签打开"
          : "帖子与评论外链将在当前页打开",
        "ok"
      );
    } catch (e) {
      toast(e instanceof Error ? e.message : "保存失败");
    } finally {
      setSavingPolicy(false);
    }
  };

  const postsToolbar = (
    <div className="admin-content-col-toolbar">
      <div className="admin-content-status-scroll">
        <AdminSegmented<AdminContentStatus>
          ariaLabel="帖子状态筛选"
          size="sm"
          value={postsStatus}
          onChange={(st) => {
            if (st === postsStatus) return;
            void loadPosts(1, st, postsQ);
          }}
          options={STATUS_TABS.map((t) => ({
            key: t.key,
            label: t.label,
            count: statusCountFor("posts", t.key, counts) ?? undefined,
          }))}
        />
      </div>
      <AdminSearchField
        value={postsKeyword}
        onChange={setPostsKeyword}
        onSubmit={() => void loadPosts(1, postsStatus, postsKeyword.trim())}
        onClear={() => {
          setPostsKeyword("");
          void loadPosts(1, postsStatus, "");
        }}
        placeholder="搜索帖子标题…"
        ariaLabel="搜索帖子"
      />
    </div>
  );

  const commentsToolbar = (
    <div className="admin-content-col-toolbar">
      <div className="admin-content-status-scroll">
        <AdminSegmented<AdminContentStatus>
          ariaLabel="评论状态筛选"
          size="sm"
          value={commentsStatus}
          onChange={(st) => {
            if (st === commentsStatus) return;
            void loadComments(1, st, commentsQ);
          }}
          options={STATUS_TABS.map((t) => ({
            key: t.key,
            label: t.label,
            count: statusCountFor("comments", t.key, counts) ?? undefined,
          }))}
        />
      </div>
      <AdminSearchField
        value={commentsKeyword}
        onChange={setCommentsKeyword}
        onSubmit={() => void loadComments(1, commentsStatus, commentsKeyword.trim())}
        onClear={() => {
          setCommentsKeyword("");
          void loadComments(1, commentsStatus, "");
        }}
        placeholder="搜索评论正文…"
        ariaLabel="搜索评论"
      />
    </div>
  );

  const postsBody = (
    <>
      {postsError ? <p className="alert-error m-3 text-[12.5px]">{postsError}</p> : null}
      {postsLoading && posts.length === 0 ? (
        <div className="flex justify-center py-14">
          <Loader2 size={20} className="animate-spin" style={{ color: "var(--ink-3)" }} />
        </div>
      ) : posts.length === 0 ? (
        <AdminEmpty
          icon={<FileText size={20} />}
          title={postsStatus === "pending" ? "暂无待审帖子" : "暂无帖子"}
          description={
            postsStatus === "pending" ? "新提交的帖子会按时间出现在这里" : undefined
          }
        />
      ) : (
        posts.map((p, idx) => {
          const key = `p-${p.id}`;
          const busy = actingKey === key;
          const chip = contentStatusChip(p.status, p.deleted);
          const pending = isPendingRow(p.status, p.deleted);
          return (
            <div
              key={p.id}
              className="flex items-start gap-2.5 px-3 sm:px-3.5 py-3"
              style={idx === 0 ? undefined : { borderTop: "1px solid var(--line)" }}
            >
              <Avatar
                name={p.user?.nickname || p.user?.username || "?"}
                src={p.user?.avatar || undefined}
                size={30}
              />
              <div className="min-w-0 flex-1">
                <div className="flex items-center gap-1.5 flex-wrap min-w-0">
                  <span
                    className="text-[12.5px] font-medium truncate max-w-[9rem]"
                    style={{ color: "var(--ink)" }}
                  >
                    {p.user?.nickname || p.user?.username || "?"}
                  </span>
                  <AdminStatusChip tone={chip.tone}>{chip.label}</AdminStatusChip>
                  <span className="meta text-[11px]">{p.board?.name}</span>
                  <span className="meta text-[11px] tabular-nums">
                    {formatRelative(p.created_at)}
                  </span>
                </div>
                {p.deleted ? (
                  <p
                    className="mt-1 text-[13px] leading-snug line-clamp-2"
                    style={{ color: "var(--ink-2)" }}
                    data-tip={p.title}
                  >
                    {p.title}
                  </p>
                ) : (
                  <Link
                    href={`/post/${p.id}`}
                    className="mt-1 block text-[13px] font-medium leading-snug hover:underline line-clamp-2"
                    style={{ color: "var(--ink)" }}
                    data-tip={p.title}
                  >
                    {p.title}
                  </Link>
                )}
                <p className="meta text-[11.5px] mt-0.5">{p.comment_count} 评</p>
                <div className="flex items-center gap-1 mt-1.5 flex-wrap">
                  {pending ? (
                    <PendingActions
                      busy={busy}
                      onApprove={() =>
                        runAction(
                          key,
                          () => apiAdminApprovePost(p.id),
                          "已通过审核，内容已公开",
                          () => reloadPosts()
                        )
                      }
                      onReject={() => askReject("posts", p.id)}
                    />
                  ) : null}
                  {p.deleted ? (
                    <>
                      {canModerateAuthor({ role: viewerRole }, p.user?.role) ? (
                        <ContentAction
                          label="恢复"
                          ok
                          disabled={busy}
                          icon={
                            busy ? (
                              <Loader2 size={13} className="animate-spin" />
                            ) : (
                              <RotateCcw size={13} />
                            )
                          }
                          onClick={() =>
                            runAction(
                              key,
                              () => apiAdminRestorePost(p.id),
                              "帖子已恢复",
                              () => reloadPosts()
                            )
                          }
                        />
                      ) : null}
                      {canPurge ? (
                        <ContentAction
                          label="清除"
                          danger
                          disabled={busy}
                          icon={<Trash2 size={13} />}
                          onClick={() =>
                            askConfirm(
                              "彻底删除帖子",
                              `「${p.title}」将从数据库永久删除，且其下评论一并清除，不可撤销。`,
                              () =>
                                apiAdminPurgePost(p.id).then(() => {
                                  toast("帖子已彻底删除", "ok");
                                  reloadPosts();
                                }),
                              true
                            )
                          }
                        />
                      ) : null}
                    </>
                  ) : canModerateAuthor({ role: viewerRole }, p.user?.role) ? (
                    <ContentAction
                      label="删除"
                      danger
                      disabled={busy}
                      icon={<Trash2 size={13} />}
                      onClick={() => setStaffDeletePost(p)}
                    />
                  ) : null}
                </div>
              </div>
            </div>
          );
        })
      )}
    </>
  );

  const commentsBody = (
    <>
      {commentsError ? <p className="alert-error m-3 text-[12.5px]">{commentsError}</p> : null}
      {commentsLoading && comments.length === 0 ? (
        <div className="flex justify-center py-14">
          <Loader2 size={20} className="animate-spin" style={{ color: "var(--ink-3)" }} />
        </div>
      ) : comments.length === 0 ? (
        <AdminEmpty
          icon={<MessagesSquare size={20} />}
          title={commentsStatus === "pending" ? "暂无待审评论" : "暂无评论"}
          description={
            commentsStatus === "pending" ? "新提交的评论会按时间出现在这里" : undefined
          }
        />
      ) : (
        comments.map((c, idx) => {
          const key = `c-${c.id}`;
          const busy = actingKey === key;
          const chip = contentStatusChip(c.status, c.deleted);
          const pending = isPendingRow(c.status, c.deleted);
          const plain = commentPlain(c.content);
          return (
            <div
              key={c.id}
              className="flex items-start gap-2.5 px-3 sm:px-3.5 py-3"
              style={idx === 0 ? undefined : { borderTop: "1px solid var(--line)" }}
            >
              <Avatar
                name={c.user?.nickname || c.user?.username || "?"}
                src={c.user?.avatar || undefined}
                size={30}
              />
              <div className="min-w-0 flex-1">
                <div className="flex items-center gap-1.5 flex-wrap min-w-0">
                  <span
                    className="text-[12.5px] font-medium truncate max-w-[9rem]"
                    style={{ color: "var(--ink)" }}
                  >
                    {c.user?.nickname || c.user?.username || "?"}
                  </span>
                  <AdminStatusChip tone={chip.tone}>{chip.label}</AdminStatusChip>
                  <span className="meta text-[11px]">{c.board?.name}</span>
                  <span className="meta text-[11px] tabular-nums">
                    {formatRelative(c.created_at)}
                  </span>
                </div>
                <ClampText text={plain} className="mt-1" style={{ color: "var(--ink)" }} />
                <p className="meta text-[11.5px] mt-0.5">
                  {c.deleted ? (
                    c.post_title
                  ) : (
                    <Link
                      href={`/post/${c.post_id}`}
                      className="hover:underline"
                      style={{ color: "var(--accent)" }}
                    >
                      {c.post_title || `帖子 #${c.post_id}`}
                    </Link>
                  )}
                </p>
                <div className="flex items-center gap-1 mt-1.5 flex-wrap">
                  {pending ? (
                    <PendingActions
                      busy={busy}
                      onApprove={() =>
                        runAction(
                          key,
                          () => apiAdminApproveComment(c.id),
                          "已通过审核，内容已公开",
                          () => reloadComments()
                        )
                      }
                      onReject={() => askReject("comments", c.id)}
                    />
                  ) : null}
                  <ContentAction
                    label="历史"
                    icon={<History size={13} />}
                    onClick={() => setHistoryCommentId(c.id)}
                  />
                  {c.deleted ? (
                    <>
                      {canModerateAuthor({ role: viewerRole }, c.user?.role) ? (
                        <ContentAction
                          label="恢复"
                          ok
                          disabled={busy}
                          icon={
                            busy ? (
                              <Loader2 size={13} className="animate-spin" />
                            ) : (
                              <RotateCcw size={13} />
                            )
                          }
                          onClick={() =>
                            runAction(
                              key,
                              () => apiAdminRestoreComment(c.id),
                              "评论已恢复",
                              () => reloadComments()
                            )
                          }
                        />
                      ) : null}
                      {canPurge ? (
                        <ContentAction
                          label="清除"
                          danger
                          disabled={busy}
                          icon={<Trash2 size={13} />}
                          onClick={() =>
                            askConfirm(
                              "彻底删除评论",
                              "该评论将永久删除且不可恢复。",
                              () =>
                                apiAdminPurgeComment(c.id).then(() => {
                                  toast("评论已彻底删除", "ok");
                                  reloadComments();
                                }),
                              true
                            )
                          }
                        />
                      ) : null}
                    </>
                  ) : canModerateAuthor({ role: viewerRole }, c.user?.role) ? (
                    <ContentAction
                      label="删除"
                      danger
                      disabled={busy}
                      icon={<Trash2 size={13} />}
                      onClick={() => setStaffDeleteComment(c)}
                    />
                  ) : null}
                </div>
              </div>
            </div>
          );
        })
      )}
    </>
  );

  const postsCol = (
    <ColumnShell
      icon={<FileText size={15} />}
      title="帖子"
      count={counts.posts_live}
      pending={counts.posts_pending}
      toolbar={postsToolbar}
      body={postsBody}
      pager={
        <AdminPager
          page={postsPage}
          total={postsTotal}
          pageSize={PAGE_SIZE}
          loading={postsLoading}
          onChange={(p) => void loadPosts(p, postsStatus, postsQ)}
          className={pagerClass}
        />
      }
      className={mobileKind === "posts" ? "max-lg:flex" : "max-lg:hidden"}
    />
  );

  const commentsCol = (
    <ColumnShell
      icon={<MessagesSquare size={15} />}
      title="评论"
      count={counts.comments_live}
      pending={counts.comments_pending}
      toolbar={commentsToolbar}
      body={commentsBody}
      pager={
        <AdminPager
          page={commentsPage}
          total={commentsTotal}
          pageSize={PAGE_SIZE}
          loading={commentsLoading}
          onChange={(p) => void loadComments(p, commentsStatus, commentsQ)}
          className={pagerClass}
        />
      }
      className={mobileKind === "comments" ? "max-lg:flex" : "max-lg:hidden"}
    />
  );

  return (
    <div className="admin-content-page">
      <AdminPageHeader
        icon={FolderOpen}
        title="内容管理"
        description="审核与管理帖子、评论。共用策略作用于全站发帖与评论，与下方列表筛选无关。"
      />

      {canConfigureSettings && (
        <div className="admin-content-policy" role="group" aria-label="全站内容策略">
          <div className="admin-content-policy-lead">
            <span className="admin-content-policy-title">共用策略</span>
            <span className="admin-content-policy-scope">
              过审免审与外链开关改完立即写入；冷静期需点保存。失败时恢复为已确认值。
            </span>
          </div>
          <div className="admin-content-policy-row">
            <PolicyChip
              title="过审免审"
              instant
              hint="帖子 / 评论：用户曾有过审内容后，后续发帖与评论直接公开，不再进待审。修改后立即生效。"
              control={
                <AdminSwitch
                  checked={trustOn}
                  disabled={savingPolicy}
                  onChange={() => void toggleTrust()}
                  label="过审免审（帖子与评论）"
                />
              }
            />
            <PolicyChip
              title="新用户冷静期"
              hint="仅限制新注册用户发帖（0=关闭，上限 168 小时）。评论与聊天不受此限制。需点保存后生效。"
              control={
                <div className="flex items-center gap-1.5">
                  <AdminStepper
                    value={cooldown}
                    onChange={setCooldown}
                    min={0}
                    max={168}
                    unit="小时"
                    ariaLabel="新用户发帖冷静期小时数"
                    disabled={savingPolicy}
                  />
                  <button
                    type="button"
                    className="btn btn-line btn-sm"
                    disabled={savingPolicy}
                    onClick={() => void saveCooldown()}
                  >
                    {savingPolicy ? "保存中…" : "保存"}
                  </button>
                </div>
              }
            />
            <PolicyChip
              title="外链新开"
              instant
              hint="帖子与评论中的外链在新标签打开。修改后立即生效。"
              control={
                <AdminSwitch
                  checked={postLinkNewTab}
                  disabled={savingPolicy}
                  onChange={() => void togglePostLinkNewTab()}
                  label="外链新开（帖子与评论）"
                />
              }
            />
          </div>
        </div>
      )}

      {/* 窄屏：顶部分段切换双栏 */}
      <div className="admin-content-kind lg:hidden shrink-0" role="tablist" aria-label="内容类型">
        <button
          type="button"
          role="tab"
          aria-selected={mobileKind === "posts"}
          className="admin-content-kind-btn"
          onClick={() => setMobileKind("posts")}
        >
          <FileText size={14} aria-hidden />
          帖子
          <span className="admin-content-kind-count">{counts.posts_live}</span>
          {counts.posts_pending > 0 ? (
            <span className="admin-status is-warn" data-tip={`${counts.posts_pending} 条待审`}>
              {counts.posts_pending}
            </span>
          ) : null}
        </button>
        <button
          type="button"
          role="tab"
          aria-selected={mobileKind === "comments"}
          className="admin-content-kind-btn"
          onClick={() => setMobileKind("comments")}
        >
          <MessagesSquare size={14} aria-hidden />
          评论
          <span className="admin-content-kind-count">{counts.comments_live}</span>
          {counts.comments_pending > 0 ? (
            <span className="admin-status is-warn" data-tip={`${counts.comments_pending} 条待审`}>
              {counts.comments_pending}
            </span>
          ) : null}
        </button>
      </div>

      <div className="admin-content-triptych">
        {postsCol}
        {commentsCol}
      </div>

      <ConfirmDialog
        open={!!confirm}
        title={confirm?.title || ""}
        message={confirm?.message || ""}
        danger={confirm?.danger}
        busy={confirmBusy}
        confirmLabel={confirm?.confirmLabel || (confirm?.danger ? "确认删除" : "确定")}
        onCancel={() => !confirmBusy && setConfirm(null)}
        onConfirm={() => {
          if (!confirm) return;
          setConfirmBusy(true);
          confirm
            .run()
            .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
            .finally(() => {
              setConfirmBusy(false);
              setConfirm(null);
            });
        }}
      />

      <StaffDeletePostModal
        open={!!staffDeletePost}
        title={staffDeletePost?.title}
        busy={staffDeleteBusy}
        onClose={() => !staffDeleteBusy && setStaffDeletePost(null)}
        onConfirm={(opts) => {
          if (!staffDeletePost) return;
          setStaffDeleteBusy(true);
          apiAdminSoftDeletePost(staffDeletePost.id, opts)
            .then(() => {
              toast("已移入回收站", "ok");
              setStaffDeletePost(null);
              reloadPosts();
            })
            .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
            .finally(() => setStaffDeleteBusy(false));
        }}
      />

      <DeleteCommentModal
        open={!!staffDeleteComment}
        mode="staff"
        busy={staffDeleteCommentBusy}
        onClose={() => !staffDeleteCommentBusy && setStaffDeleteComment(null)}
        onConfirm={(opts) => {
          if (!staffDeleteComment) return;
          setStaffDeleteCommentBusy(true);
          apiAdminSoftDeleteComment(staffDeleteComment.id, opts)
            .then(() => {
              toast("已移入回收站", "ok");
              setStaffDeleteComment(null);
              reloadComments();
            })
            .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
            .finally(() => setStaffDeleteCommentBusy(false));
        }}
      />

      <CommentEditHistoryModal
        open={historyCommentId != null}
        commentId={historyCommentId}
        onClose={() => setHistoryCommentId(null)}
      />
    </div>
  );
}