"use client";

import { setRequestStatusAction } from "@/app/(internal)/admin/actions";
import Image from "next/image";
import Link from "next/link";
import { usePathname, useRouter } from "next/navigation";
import { useMemo, useState, useTransition } from "react";
import { useLanguage } from "@/app/context/LanguageContext";
import { useTranslation } from "@/app/hooks/useTranslation";
import type { AdminRequestRow, SubmissionStatus } from "@/types/admin-submission";

type AdminRequest = AdminRequestRow;
type StatusKey = SubmissionStatus;

export type AdminConsoleView = "all" | "pending" | "approved" | "rejected";

export type AdminData = {
  meta: {
    title: string;
    subtitle: string;
    user: { name: string; role: string; avatarUrl: string };
    footerTag: string;
  };
  stats: Array<{
    id: string;
    label: string;
    value: string;
    hint: string;
    icon: string;
    accent: "none" | "pending" | "confirmed" | "progress";
    progressPercent?: number;
  }>;
  filters: {
    status: { label: string; options: { value: string; label: string }[] };
    companyGroup: { label: string; options: { value: string; label: string }[] };
    searchPlaceholder: string;
    exportLabel: string;
  };
  table: {
    columns: Record<string, string>;
    pageSize: number;
  };
  statusMap: Record<
    StatusKey,
    {
      label: string;
      borderClass: string;
      dotClass: string;
    }
  >;
  requests: AdminRequest[];
  footer: { legal: string[] };
};

function InfoItem({ 
  label, 
  value, 
  isEmail = false, 
  isStatus = false,
  status = "",
  statusMap = {} as any
}: { 
  label: string; 
  value?: string; 
  isEmail?: boolean;
  isStatus?: boolean;
  status?: string;
  statusMap?: any;
}) {
  if (!value && !isStatus) return (
    <div className="flex flex-col gap-1">
      <span className="text-[10px] font-[var(--font-label-caps)] text-outline uppercase tracking-widest">{label}</span>
      <span className="text-sm text-on-surface-variant/40 italic">—</span>
    </div>
  );

  return (
    <div className="flex flex-col gap-1">
      <span className="text-[10px] font-[var(--font-label-caps)] text-outline uppercase tracking-widest">{label}</span>
      {isStatus ? (
        <span className={`px-2 py-0.5 rounded text-[10px] font-bold border w-fit uppercase tracking-wider ${statusMap[status]?.borderClass || ""}`}>
          {value}
        </span>
      ) : (
        <span className={`text-sm font-medium ${isEmail ? "text-primary hover:underline cursor-pointer" : "text-on-surface"}`}>
          {value}
        </span>
      )}
    </div>
  );
}

function StatCard({
  item,
}: {
  item: AdminData["stats"][0];
}) {
  const accent =
    item.accent === "pending"
      ? "border-l-4 border-secondary"
      : item.accent === "confirmed"
        ? "border-l-4 border-primary"
        : "";

  return (
    <div className={`glass-panel p-6 rounded-xl relative overflow-hidden group ${accent}`}>
      <div className="absolute top-0 right-0 p-4 opacity-10 group-hover:opacity-20 transition-opacity pointer-events-none">
        <span className="material-symbols-outlined text-6xl">{item.icon}</span>
      </div>
      <p
        className={`font-[var(--font-label-caps)] text-[11px] uppercase tracking-widest mb-2 flex items-center gap-2 ${
          item.accent === "pending"
            ? "text-secondary"
            : item.accent === "confirmed"
              ? "text-primary"
              : "text-outline"
        }`}
      >
        {item.accent === "pending" || item.accent === "confirmed" ? (
          <span
            className={`status-led w-2 h-2 rounded-full ${
              item.accent === "pending" ? "bg-secondary" : "bg-primary"
            }`}
          />
        ) : null}
        {item.label}
      </p>
      <h3 className="font-[var(--font-display-lg)] text-2xl md:text-3xl text-on-surface">{item.value}</h3>
      {item.accent === "progress" && typeof item.progressPercent === "number" ? (
        <div className="mt-4 w-full bg-surface-container-high h-1.5 rounded-full overflow-hidden">
          <div
            className="h-full gold-gradient-bg transition-all"
            style={{ width: `${item.progressPercent}%` }}
          />
        </div>
      ) : (
        <div className="mt-4 flex items-center gap-2 min-h-[20px]">
          {item.hint ? (
            <span
              className={`text-xs ${
                item.accent === "pending"
                  ? "text-secondary"
                  : item.accent === "confirmed"
                    ? "text-primary"
                    : "text-primary"
              }`}
            >
              {item.hint}
            </span>
          ) : null}
        </div>
      )}
    </div>
  );
}

const PENDING_THRESHOLD = 50;

function formatCount(n: number) {
  return n.toLocaleString("en-US");
}

function buildLiveStats(data: AdminData, lang: string) {
  const req = data.requests;
  const total = req.length;
  const pending = req.filter((r) => r.status === "pending").length;
  const approved = req.filter((r) => r.status === "approved").length;
  const rejected = req.filter((r) => r.status === "rejected").length;
  const conversionPct = total > 0 ? Math.round((approved / total) * 100) : 0;

  const isVi = lang === "vi";

  return data.stats.map((s) => {
    switch (s.id) {
      case "total":
        return {
          ...s,
          value: formatCount(total),
          hint: isVi 
            ? `${formatCount(approved)} đã duyệt · ${formatCount(pending)} chờ duyệt · ${formatCount(rejected)} từ chối`
            : `${formatCount(approved)} approved · ${formatCount(pending)} pending · ${formatCount(rejected)} rejected`,
        };
      case "pending":
        return {
          ...s,
          value: formatCount(pending),
          hint: isVi
            ? (pending >= PENDING_THRESHOLD
              ? `Đạt hoặc vượt ngưỡng (${PENDING_THRESHOLD})`
              : `Dưới ngưỡng (${PENDING_THRESHOLD})`)
            : (pending >= PENDING_THRESHOLD
              ? `At or above threshold (${PENDING_THRESHOLD})`
              : `Below threshold (${PENDING_THRESHOLD})`),
        };
      case "confirmed":
        return {
          ...s,
          value: formatCount(approved),
          hint: total > 0 
            ? (isVi ? `${Math.round((approved / total) * 100)}% trên tổng số yêu cầu` : `${Math.round((approved / total) * 100)}% of all requests`)
            : (isVi ? "Chưa có yêu cầu nào" : "No requests yet"),
        };
      case "conversion":
        return {
          ...s,
          value: `${conversionPct}%`,
          hint: total > 0 
            ? (isVi ? `Tỷ lệ đã duyệt: ${approved} / ${total}` : `Approved share: ${approved} / ${total}`)
            : "",
          progressPercent: conversionPct,
        };
      default:
        return s;
    }
  });
}

export default function AdminConsole({ data, view = "all" }: { data: AdminData; view?: AdminConsoleView }) {
  const router = useRouter();
  const pathname = usePathname();
  const [isPending, startTransition] = useTransition();
  const [search, setSearch] = useState("");
  const [status, setStatus] = useState("all");
  const [companyGroup, setCompanyGroup] = useState("all");
  const [afterDate, setAfterDate] = useState("");
  const [page, setPage] = useState(1);
  const [detail, setDetail] = useState<AdminRequest | null>(null);
  const { lang, setLang } = useLanguage();
  const { admin: t } = useTranslation();
  const [userDropdown, setUserDropdown] = useState(false);

  const handleLogout = async () => {
    try {
      await fetch("/ipv6/api/auth/logout", { method: "POST" });
      router.push("/login");
    } catch (error) {
      console.error("Logout failed", error);
    }
  };

  // Merge real requests from server prop with translated UI labels
  const tData = {
    ...t,
    requests: data.requests,
    table: { ...t.table, pageSize: data.table.pageSize },
    stats: t.stats as AdminData["stats"],
  } as AdminData;

  const liveStats = useMemo(() => buildLiveStats(tData, lang), [tData, lang]);

  const statusFilter = view === "all" ? status : view;

  const filtered = useMemo(() => {
    let q = search.trim().toLowerCase();
    // Remove leading # if searching for ID
    if (q.startsWith("#")) {
      q = q.substring(1);
    }

    return data.requests.filter((r) => {
      if (statusFilter !== "all" && r.status !== statusFilter) return false;
      if (companyGroup !== "all" && r.segment !== companyGroup) return false;
      if (afterDate && r.submittedAt < afterDate) return false;
      if (!q) return true;

      const hay = `${r.id} ${r.fullName} ${r.company} ${r.email} ${r.phone} ${r.jobTitle} ${r.status}`.toLowerCase();
      return hay.includes(q);
    });
  }, [data.requests, search, statusFilter, companyGroup, afterDate]);

  async function commitStatus(publicId: string, next: SubmissionStatus) {
    try {
      await setRequestStatusAction(publicId, next);
      startTransition(() => router.refresh());
    } catch (e) {
      alert(e instanceof Error ? e.message : "Could not update status");
    }
  }

  const pageSize = data.table.pageSize;
  const totalPages = Math.max(1, Math.ceil(filtered.length / pageSize));
  const safePage = Math.min(page, totalPages);
  const sliceStart = (safePage - 1) * pageSize;
  const pageRows = filtered.slice(sliceStart, sliceStart + pageSize);

  const showingFrom = filtered.length === 0 ? 0 : sliceStart + 1;
  const showingTo = sliceStart + pageRows.length;

  return (
    <div className="bg-background text-on-surface font-[var(--font-body-base)] min-h-screen flex relative">
      <aside className="fixed left-0 top-0 h-full w-20 md:w-24 bg-surface-container-low border-r border-outline/20 flex flex-col items-center py-8 z-50">
        <div className="mb-12">
          <div className="w-12 h-12 gold-gradient-bg flex items-center justify-center rounded-lg shadow-lg">
            <span className="material-symbols-outlined text-on-primary text-3xl" style={{ fontVariationSettings: "'FILL' 1" }}>
              cloud_done
            </span>
          </div>
        </div>
        <nav className="flex flex-col gap-8 flex-1" aria-label="Admin sections">
          {(
            [
              { href: "/admin", icon: "dashboard", label: lang === "vi" ? "Bảng điều khiển" : "Panel" },
              { href: "/admin/pending", icon: "hourglass_empty", label: lang === "vi" ? "Chờ duyệt" : "Pending" },
              { href: "/admin/approved", icon: "check_circle", label: lang === "vi" ? "Đã duyệt" : "Approved" },
              { href: "/admin/rejected", icon: "cancel", label: lang === "vi" ? "Từ chối" : "Rejected" },
            ] as const
          ).map((item) => {
            const cleanPathname = pathname.endsWith("/") ? pathname.slice(0, -1) : pathname;
            const cleanHref = item.href.endsWith("/") ? item.href.slice(0, -1) : item.href;
            const active = cleanPathname === cleanHref;
            return (
              <Link
                key={item.href}
                href={item.href}
                className={`group flex flex-col items-center gap-1 ${
                  active ? "text-primary" : "text-on-surface-variant hover:text-primary"
                }`}
              >
                <span
                  className="material-symbols-outlined text-2xl transition-all duration-300 group-hover:scale-110"
                  style={active ? { fontVariationSettings: "'FILL' 1" } : undefined}
                >
                  {item.icon}
                </span>
                <span className="font-[var(--font-label-caps)] text-[8px] uppercase tracking-widest opacity-0 group-hover:opacity-100 transition-opacity">
                  {item.label}
                </span>
              </Link>
            );
          })}
        </nav>
        {/* Settings button removed as per request */}
      </aside>

      <div className="flex-1 ml-20 md:ml-24 flex flex-col min-w-0">
        <header className="sticky top-0 w-full z-40 glass-panel py-4 px-[var(--spacing-gutter)] flex flex-col lg:flex-row items-stretch lg:items-center justify-between gap-4 border-b border-outline/10">
          <div className="hidden md:block min-w-0">
            <h1 className="font-[var(--font-display-lg)] text-xl text-primary uppercase tracking-tighter truncate">
              {view === "all"
                ? t.meta.title
                : view === "pending"
                  ? (lang === "vi" ? "Chờ Duyệt" : "Pending Approval")
                  : view === "approved"
                    ? (lang === "vi" ? "Đã Duyệt" : "Approved Requests")
                    : (lang === "vi" ? "Từ Chối" : "Rejected Requests")}
            </h1>
            <p className="font-[var(--font-label-caps)] text-on-surface-variant text-[10px] uppercase tracking-widest">
              {t.meta.subtitle}
            </p>
          </div>
          <div className="flex-1 max-w-xl mx-0 lg:mx-8 min-w-0">
            <div className="relative group">
              <span className="material-symbols-outlined absolute left-4 top-1/2 -translate-y-1/2 text-outline pointer-events-none">
                search
              </span>
              <input
                className="w-full bg-surface-container-low border-none rounded-full py-2.5 pl-12 pr-4 text-on-surface placeholder:text-outline/50 focus:outline-none focus:ring-1 focus:ring-primary/40 transition-all"
                placeholder={t.filters.searchPlaceholder}
                type="search"
                value={search}
                onChange={(e) => {
                  setSearch(e.target.value);
                  setPage(1);
                }}
              />
            </div>
          </div>
          <div className="flex items-center gap-4 shrink-0 justify-end">
            {/* Language Switcher — Admin Header */}
            <div className="flex items-center gap-1 font-[var(--font-label-caps)] text-[10px]">
              <button
                type="button"
                onClick={() => setLang("en")}
                className={`flex items-center gap-1 px-2 py-1 rounded transition-all duration-200 ${
                  lang === "en" ? "text-primary border-b border-primary" : "text-on-surface-variant/50 hover:text-primary"
                }`}
              >
                <span>EN</span>
              </button>
              <span className="text-on-surface-variant/30">|</span>
              <button
                type="button"
                onClick={() => setLang("vi")}
                className={`flex items-center gap-1 px-2 py-1 rounded transition-all duration-200 ${
                  lang === "vi" ? "text-primary border-b border-primary" : "text-on-surface-variant/50 hover:text-primary"
                }`}
              >
                <span>VIE</span>
              </button>
            </div>
            <div className="relative">
              <button
                type="button"
                onClick={() => setUserDropdown(!userDropdown)}
                className="flex flex-col items-end group"
              >
                <span className="font-[var(--font-label-caps)] text-[10px] text-primary uppercase tracking-widest group-hover:text-primary/80 transition-colors">
                  {t.meta.user.role}
                </span>
                <span className="material-symbols-outlined text-outline group-hover:text-primary transition-colors text-xs">
                  {userDropdown ? "expand_less" : "expand_more"}
                </span>
              </button>

              {userDropdown && (
                <div className="absolute right-0 mt-2 w-48 glass-panel rounded-xl shadow-2xl border border-white/10 z-[60] overflow-hidden">
                  <button
                    onClick={handleLogout}
                    className="w-full px-4 py-3 flex items-center gap-3 text-left hover:bg-white/5 text-on-surface transition-colors border-b border-white/5"
                  >
                    <span className="material-symbols-outlined text-red-400 text-lg">logout</span>
                    <span className="text-xs font-[var(--font-label-caps)] uppercase tracking-wider">
                      {lang === "vi" ? "Đăng xuất" : "Log Out"}
                    </span>
                  </button>
                </div>
              )}
            </div>
          </div>
        </header>

        <main className="p-4 md:p-6 w-full flex flex-col gap-6 flex-1">
          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-[var(--spacing-gutter)]">
            {liveStats.map((s) => (
              <StatCard key={s.id} item={s} />
            ))}
          </div>

          <section className="glass-panel px-6 py-4 rounded-xl flex flex-col lg:flex-row items-stretch lg:items-end justify-between gap-4">
            <div className="flex flex-wrap items-end gap-4 w-full lg:w-auto">
              {view === "all" ? (
                <div className="flex flex-col gap-1 min-w-[140px]">
                  <label className="font-[var(--font-label-caps)] text-[10px] text-outline uppercase tracking-wider">
                    {t.filters.status.label}
                  </label>
                  <select
                    className="bg-surface-container-high border border-outline/30 text-on-surface text-sm rounded-lg px-3 py-2 focus:outline-none focus:ring-1 focus:ring-primary/50"
                    value={status}
                    onChange={(e) => {
                      setStatus(e.target.value);
                      setPage(1);
                    }}
                  >
                    {t.filters.status.options.map((o) => (
                      <option key={o.value} value={o.value}>
                        {o.label}
                      </option>
                    ))}
                  </select>
                </div>
              ) : (
                <div className="flex flex-col gap-1 min-w-[140px]">
                  <span className="font-[var(--font-label-caps)] text-[10px] text-outline uppercase tracking-wider">
                    {t.filters.status.label}
                  </span>
                  <p className="text-sm text-on-surface capitalize py-2 border border-outline/20 rounded-lg px-3 bg-surface-container-high/50">
                    {t.statusMap[view as StatusKey]?.label ?? view}
                  </p>
                </div>
              )}
              <div className="flex flex-col gap-1 min-w-[160px]">
                <label className="font-[var(--font-label-caps)] text-[10px] text-outline uppercase tracking-wider">
                  {t.filters.companyGroup.label}
                </label>
                <select
                  className="bg-surface-container-high border border-outline/30 text-on-surface text-sm rounded-lg px-3 py-2 focus:outline-none focus:ring-1 focus:ring-primary/50"
                  value={companyGroup}
                  onChange={(e) => {
                    setCompanyGroup(e.target.value);
                    setPage(1);
                  }}
                >
                  {t.filters.companyGroup.options.map((o) => (
                    <option key={o.value} value={o.value}>
                      {o.label}
                    </option>
                  ))}
                </select>
              </div>
              <div className="flex flex-col gap-1 min-w-[160px]">
                <label className="font-[var(--font-label-caps)] text-[10px] text-outline uppercase tracking-wider">
                  {lang === "vi" ? "Nộp sau ngày" : "Submitted after"}
                </label>
                <input
                  className="bg-surface-container-high border border-outline/30 text-on-surface text-sm rounded-lg px-3 py-2 focus:outline-none focus:ring-1 focus:ring-primary/50"
                  type="date"
                  value={afterDate}
                  onChange={(e) => {
                    setAfterDate(e.target.value);
                    setPage(1);
                  }}
                />
              </div>
            </div>
            <button
              type="button"
              className="w-full lg:w-auto border border-primary text-primary font-[var(--font-label-caps)] px-6 py-2 rounded-lg transition-all hover:bg-primary hover:text-on-primary flex items-center justify-center gap-2 uppercase tracking-wider text-xs"
              onClick={() => alert("Export is not wired (frontend-only demo).")}
            >
              <span className="material-symbols-outlined text-sm">download</span>
              {t.filters.exportLabel}
            </button>
          </section>

          <div className="glass-panel rounded-xl overflow-hidden shadow-2xl">
            <div className="overflow-x-auto">
              <table className="w-full text-left border-collapse min-w-[880px]">
                <thead>
                  <tr className="bg-surface-container-high border-b border-outline/20">
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest w-[80px]">
                      {t.table.columns.id}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest w-[100px]">
                      {t.table.columns.submitted}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest min-w-[160px]">
                      {t.table.columns.name}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest min-w-[140px]">
                      {t.table.columns.company}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest min-w-[160px]">
                      {t.table.columns.contact}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest w-[110px]">
                      {t.table.columns.status}
                    </th>
                    <th className="px-4 py-3 font-[var(--font-label-caps)] text-outline text-[10px] uppercase tracking-widest text-right w-[160px]">
                      {t.table.columns.actions}
                    </th>
                  </tr>
                </thead>
                <tbody className="divide-y divide-outline/10">
                  {pageRows.map((row) => {
                    const sm = t.statusMap[row.status as StatusKey];
                    return (
                      <tr key={row.id} className="hover:bg-surface-container-high/40 transition-colors border-b border-outline/5 last:border-0">
                        <td className="px-4 py-3 font-[var(--font-mono)] text-[13px] text-primary whitespace-nowrap">
                          #{row.id}
                        </td>
                        <td className="px-4 py-3 text-[13px] text-on-surface-variant whitespace-nowrap">
                          {row.displayDate}
                        </td>
                        <td className="px-4 py-3">
                          <div className="font-[var(--font-body-base)] text-[13px] font-semibold text-on-surface truncate max-w-[200px]" title={row.fullName}>
                            {row.fullName}
                          </div>
                          <div className="text-[11px] text-outline truncate max-w-[200px]" title={row.jobTitle}>
                            {row.jobTitle}
                          </div>
                        </td>
                        <td className="px-4 py-3 text-[13px] text-on-surface-variant truncate max-w-[150px]" title={row.company}>
                          {row.company || "—"}
                        </td>
                        <td className="px-4 py-3">
                          <div className="text-[13px] truncate max-w-[180px]" title={row.email}>{row.email || "—"}</div>
                          <div className="text-[11px] text-outline truncate max-w-[180px]" title={row.phone}>{row.phone || "—"}</div>
                        </td>
                        <td className="px-4 py-3">
                          <span
                            className={`px-2 py-0.5 rounded-full text-[9px] font-[var(--font-label-caps)] border uppercase tracking-wider flex items-center gap-1.5 w-fit ${sm.borderClass}`}
                          >
                            <span className={`w-1 h-1 rounded-full status-led ${sm.dotClass}`} />
                            {sm.label}
                          </span>
                        </td>
                        <td className="px-4 py-3 text-right">
                          <div className="flex items-center justify-end gap-0.5">
                            <button
                              type="button"
                              className="p-1.5 rounded-lg hover:bg-surface-container-highest text-on-surface-variant hover:text-on-surface transition-all disabled:opacity-40"
                              title={lang === "vi" ? "Xem" : "View"}
                              disabled={isPending}
                              onClick={() => setDetail(row)}
                            >
                              <span className="material-symbols-outlined text-lg">visibility</span>
                            </button>
                            {row.status === "pending" ? (
                              <>
                                <button
                                  type="button"
                                  className="p-1.5 rounded-lg hover:bg-primary/20 text-primary transition-all disabled:opacity-40"
                                  title={lang === "vi" ? "Sửa" : "Edit"}
                                  disabled={isPending}
                                  onClick={() => alert(lang === "vi" ? `Sửa ${row.id} (chưa hỗ trợ).` : `Edit ${row.id} (not implemented).`)}
                                >
                                  <span className="material-symbols-outlined text-lg">edit</span>
                                </button>
                                <button
                                  type="button"
                                  className="p-1.5 rounded-lg text-white hover:bg-primary hover:text-white transition-all disabled:opacity-40"
                                  title={lang === "vi" ? "Duyệt" : "Approve"}
                                  disabled={isPending}
                                  onClick={() => commitStatus(row.id, "approved")}
                                >
                                  <span className="material-symbols-outlined text-lg" style={{ fontVariationSettings: "'FILL' 1" }}>
                                    check
                                  </span>
                                </button>
                                <button
                                  type="button"
                                  className="p-1.5 rounded-lg hover:bg-red-500/15 text-red-300 transition-all disabled:opacity-40"
                                  title={lang === "vi" ? "Từ chối" : "Reject"}
                                  disabled={isPending}
                                  onClick={() => commitStatus(row.id, "rejected")}
                                >
                                  <span className="material-symbols-outlined text-lg">close</span>
                                </button>
                              </>
                            ) : (
                              <>
                                <button
                                  type="button"
                                  className="p-1.5 rounded-lg hover:bg-surface-container-highest text-on-surface-variant disabled:opacity-40"
                                  title={lang === "vi" ? "Lịch sử" : "History"}
                                  disabled={isPending}
                                  onClick={() => alert(lang === "vi" ? `Lịch sử cho ${row.id} (đang cập nhật).` : `History for ${row.id} (placeholder).`)}
                                >
                                  <span className="material-symbols-outlined text-lg">history</span>
                                </button>
                                {row.status === "approved" ? (
                                  <>
                                    <button
                                      type="button"
                                      className="p-1.5 rounded-lg hover:bg-surface-container-high text-on-surface-variant disabled:opacity-40"
                                      title={lang === "vi" ? "Hoàn tác" : "Mark pending"}
                                      disabled={isPending}
                                      onClick={() => commitStatus(row.id, "pending")}
                                    >
                                      <span className="material-symbols-outlined text-lg">undo</span>
                                    </button>
                                    <button
                                      type="button"
                                      className="p-1.5 rounded-lg hover:bg-red-500/15 text-red-300 transition-all disabled:opacity-40"
                                      title={lang === "vi" ? "Từ chối" : "Reject"}
                                      disabled={isPending}
                                      onClick={() => commitStatus(row.id, "rejected")}
                                    >
                                      <span className="material-symbols-outlined text-lg">close</span>
                                    </button>
                                  </>
                                ) : (
                                  <>
                                    <button
                                      type="button"
                                      className="p-1.5 rounded-lg text-white hover:bg-primary hover:text-white transition-all disabled:opacity-40"
                                      title={lang === "vi" ? "Duyệt" : "Approve"}
                                      disabled={isPending}
                                      onClick={() => commitStatus(row.id, "approved")}
                                    >
                                      <span className="material-symbols-outlined text-lg" style={{ fontVariationSettings: "'FILL' 1" }}>
                                        check
                                      </span>
                                    </button>
                                    <button
                                      type="button"
                                      className="p-2 rounded-lg hover:bg-surface-container-high text-on-surface-variant disabled:opacity-40"
                                      title={lang === "vi" ? "Hoàn tác" : "Mark pending"}
                                      disabled={isPending}
                                      onClick={() => commitStatus(row.id, "pending")}
                                    >
                                      <span className="material-symbols-outlined text-lg">undo</span>
                                    </button>
                                  </>
                                )}
                              </>
                            )}
                          </div>
                        </td>
                      </tr>
                    );
                  })}
                </tbody>
              </table>
            </div>
            <div className="px-6 py-4 border-t border-outline/10 flex flex-col sm:flex-row items-center justify-between gap-4">
              <p className="text-xs text-outline">
                {lang === "vi"
                  ? `Hiển thị ${showingFrom}–${showingTo} / ${filtered.length} mục`
                  : `Showing ${showingFrom} to ${showingTo} of ${filtered.length} entries`}
              </p>
              <div className="flex items-center gap-3">
                <span className="text-xs text-on-surface-variant hidden sm:inline">
                  {lang === "vi" ? `Trang ${safePage} / ${totalPages}` : `Page ${safePage} of ${totalPages}`}
                </span>
                <button
                  type="button"
                  className="w-8 h-8 flex items-center justify-center rounded border border-outline/30 text-outline hover:border-primary hover:text-primary transition-all disabled:opacity-40"
                  disabled={safePage <= 1}
                  onClick={() => setPage((p) => Math.max(1, p - 1))}
                >
                  <span className="material-symbols-outlined text-sm">chevron_left</span>
                </button>
                <button
                  type="button"
                  className="w-8 h-8 flex items-center justify-center rounded border border-outline/30 text-outline hover:border-primary hover:text-primary transition-all disabled:opacity-40"
                  disabled={safePage >= totalPages}
                  onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
                >
                  <span className="material-symbols-outlined text-sm">chevron_right</span>
                </button>
              </div>
            </div>
          </div>
        </main>

        <footer className="mt-auto border-t border-outline/20 py-8 px-[var(--spacing-gutter)] flex flex-col md:flex-row items-center justify-between gap-4">
          <div className="flex flex-wrap items-center gap-4 justify-center md:justify-start">
            <span className="font-[var(--font-display-lg)] text-sm text-primary uppercase tracking-tighter">IPv6 SUMMIT 2026</span>
            <span className="text-xs text-outline">| {t.meta.footerTag}</span>
          </div>
          <p className="text-[11px] font-[var(--font-label-caps)] text-outline tracking-widest text-center">
            {lang === "vi"
              ? "© 2026 Hội Nghị IPv6 cho AI & Trung Tâm Dữ Liệu. Hạ Tầng Cho Tương Lai."
              : "© 2026 IPv6 for AI & Data Centre Summit. Infrastructure for the Future."}
          </p>
          <div className="flex items-center gap-6 justify-center">
            {t.footer.legal.map((label) => (
              <button
                key={label}
                type="button"
                className="text-[10px] font-[var(--font-label-caps)] text-on-surface-variant hover:text-primary transition-colors uppercase tracking-widest"
                onClick={() => alert(`${label} (placeholder).`)}
              >
                {label}
              </button>
            ))}
          </div>
        </footer>
      </div>

      <div className="fixed top-[-10%] left-[-10%] w-[40%] h-[40%] bg-primary/5 blur-[120px] rounded-full -z-10 pointer-events-none" />
      <div className="fixed bottom-[-10%] right-[-10%] w-[30%] h-[30%] bg-secondary/5 blur-[100px] rounded-full -z-10 pointer-events-none" />

      {detail ? (
        <div
          className="fixed inset-0 z-[100] flex items-end sm:items-center justify-center p-4 bg-black/60 backdrop-blur-sm"
          role="dialog"
          aria-modal="true"
          aria-labelledby="admin-detail-title"
        >
          <button
            type="button"
            className="absolute inset-0 cursor-default"
            aria-label="Close"
            onClick={() => setDetail(null)}
          />
          <div className="relative w-full max-w-2xl glass-panel rounded-2xl border border-white/10 shadow-[0_20px_50px_rgba(0,0,0,0.5)] z-10 overflow-hidden flex flex-col max-h-[90vh]">
            {/* Modal Header */}
            <div className="p-6 border-b border-white/5 bg-white/5 flex items-center justify-between">
              <div className="flex items-center gap-4">
                <div className="w-10 h-10 gold-gradient-bg rounded-lg flex items-center justify-center shadow-lg">
                  <span className="material-symbols-outlined text-on-primary">
                    {detail.source === "feedback" ? "rate_review" : "person_add"}
                  </span>
                </div>
                <div>
                  <h2 id="admin-detail-title" className="font-[var(--font-display-lg)] text-xl text-primary leading-tight">
                    {detail.fullName || (lang === "vi" ? "Yêu cầu mới" : "New Request")}
                  </h2>
                  <p className="text-[10px] font-[var(--font-label-caps)] text-outline uppercase tracking-widest mt-0.5">
                    ID: #{detail.id} • {detail.displayDate}
                  </p>
                </div>
              </div>
              <button
                type="button"
                className="w-10 h-10 rounded-full hover:bg-white/10 text-on-surface-variant flex items-center justify-center transition-colors"
                onClick={() => setDetail(null)}
              >
                <span className="material-symbols-outlined text-2xl">close</span>
              </button>
            </div>

            {/* Modal Body */}
            <div className="flex-1 overflow-y-auto p-8 space-y-8 custom-scrollbar">
              {/* Primary Info Grid */}
              <div className="grid grid-cols-1 md:grid-cols-2 gap-8">
                <div className="space-y-6">
                  <h3 className="text-xs font-[var(--font-label-caps)] text-primary uppercase tracking-[0.2em] border-b border-primary/20 pb-2">
                    {lang === "vi" ? "Thông tin cá nhân" : "Identity & Professional"}
                  </h3>
                  <div className="space-y-4">
                    <InfoItem label={lang === "vi" ? "Họ và tên" : "Full Name"} value={detail.fullName} />
                    <InfoItem label={lang === "vi" ? "Chức vụ" : "Job Title"} value={detail.jobTitle} />
                    <InfoItem label={lang === "vi" ? "Công ty / Tổ chức" : "Company"} value={detail.company} />
                    <InfoItem label={lang === "vi" ? "Phân khúc" : "Segment"} value={detail.segment} />
                  </div>
                </div>

                <div className="space-y-6">
                  <h3 className="text-xs font-[var(--font-label-caps)] text-primary uppercase tracking-[0.2em] border-b border-primary/20 pb-2">
                    {lang === "vi" ? "Thông tin liên hệ" : "Contact Details"}
                  </h3>
                  <div className="space-y-4">
                    <InfoItem label="Email" value={detail.email} isEmail />
                    <InfoItem label={lang === "vi" ? "Số điện thoại" : "Phone Number"} value={detail.phone} />
                    <InfoItem 
                      label={lang === "vi" ? "Trạng thái hồ sơ" : "Application Status"} 
                      value={lang === "vi" ? (t.statusMap[detail.status as StatusKey]?.label || detail.status) : detail.status}
                      isStatus
                      status={detail.status}
                      statusMap={t.statusMap}
                    />
                  </div>
                </div>
              </div>

              {/* Form Content / Notes Section */}
              {detail.notes && (
                <div className="space-y-6">
                  <h3 className="text-xs font-[var(--font-label-caps)] text-primary uppercase tracking-[0.2em] border-b border-primary/20 pb-2">
                    {lang === "vi" ? "Nội dung phản hồi" : "Form Submission Content"}
                  </h3>
                  <div className="glass-panel p-6 rounded-xl bg-white/5 border border-white/5">
                    {detail.notes.startsWith("Source:") ? (
                      <div className="grid grid-cols-1 gap-4">
                        {detail.notes.split(/\s(?=[A-Z][a-z\s]+:)/).map((part, idx) => {
                          const [key, ...val] = part.split(":");
                          if (!val.length) return <p key={idx} className="text-sm text-on-surface-variant leading-relaxed">{part}</p>;
                          return (
                            <div key={idx} className="flex flex-col sm:flex-row sm:items-baseline gap-1 sm:gap-4 border-b border-white/5 pb-3 last:border-0 last:pb-0">
                              <span className="text-[11px] font-[var(--font-label-caps)] text-outline uppercase tracking-wider min-w-[140px] shrink-0">
                                {key.replace("Source:", "").trim()}
                              </span>
                              <span className="text-sm text-on-surface font-medium">
                                {val.join(":").trim()}
                              </span>
                            </div>
                          );
                        })}
                      </div>
                    ) : (
                      <p className="text-sm text-on-surface-variant leading-relaxed whitespace-pre-wrap italic">
                        {detail.notes}
                      </p>
                    )}
                  </div>
                </div>
              )}
            </div>

            {/* Modal Footer Actions */}
            <div className="p-6 border-t border-white/5 bg-white/5 flex items-center justify-end gap-4">
              <button
                type="button"
                className="px-6 py-2.5 rounded-lg border border-white/10 text-on-surface-variant text-xs font-bold uppercase tracking-wider hover:bg-white/5 transition-all"
                onClick={() => setDetail(null)}
              >
                {lang === "vi" ? "Đóng" : "Close"}
              </button>
              {detail.status === "pending" && (
                <button
                  type="button"
                  className="px-6 py-2.5 rounded-lg gold-gradient-bg text-on-primary text-xs font-bold uppercase tracking-wider shadow-lg shadow-primary/20 active:scale-95 transition-all"
                  onClick={() => {
                    commitStatus(detail.id, "approved");
                    setDetail(null);
                  }}
                >
                  {lang === "vi" ? "Phê duyệt hồ sơ" : "Approve Application"}
                </button>
              )}
            </div>
          </div>
        </div>
      ) : null}
    </div>
  );
}