"use client";

import clsx from "clsx";
import Link from "next/link";
import {
  Activity,
  BarChart3,
  Bell,
  ChevronDown,
  ChevronLeft,
  ChevronRight,
  CloudSun,
  CreditCard,
  Gauge,
  LineChart,
  LockKeyhole,
  LogIn,
  Menu,
  RefreshCw,
  Search,
  Table2,
  UserRound,
} from "lucide-react";
import { Fragment, useCallback, useEffect, useMemo, useRef, useState } from "react";
import {
  Area,
  AreaChart,
  Bar,
  BarChart as ReBarChart,
  CartesianGrid,
  Line,
  LineChart as ReLineChart,
  ReferenceLine,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis,
} from "recharts";
import type { ProAccessState, ScanOpportunityRow } from "@/lib/dashboard-types";
import { getInitialLocaleFromNavigator } from "@/lib/i18n";
import { isBrowserLocalFullAccess } from "@/lib/local-dev-access";
import { sortRowsByUserTime } from "@/components/dashboard/scan-terminal/decision-utils";
import { ProductAccessRequired } from "@/components/dashboard/scan-terminal/ProductAccessRequired";
import {
  type ContinentGroup,
  buildContinentGroups,
  formatPrice,
  formatSpreadLiquidity,
  GAP_COLOR_MAP,
  getDefaultExpanded,
  getGapColor,
  getSignalLabel,
  getSignalState,
  TRADING_REGIONS,
} from "@/components/dashboard/scan-terminal/continent-grouping";
import { MobileCityCard } from "@/components/dashboard/scan-terminal/MobileCityCard";
import { MobileRegionTabs } from "@/components/dashboard/scan-terminal/MobileRegionTabs";
import { useScanTerminalQuery } from "@/components/dashboard/scan-terminal/use-scan-terminal-query";
import {
  useScanTerminalTheme,
  useUserLocalClock,
} from "@/components/dashboard/scan-terminal/use-scan-terminal-ui-state";
import { ScanTerminalLoadingScreen } from "@/components/dashboard/scan-terminal/ScanTerminalShellParts";
import { scanRootClass } from "@/components/dashboard/scan-root-styles";
import { useRelativeTime } from "@/hooks/useRelativeTime";
import { Panel } from "@/components/dashboard/scan-terminal/Panel";
import { GroupedMarketTable } from "@/components/dashboard/scan-terminal/GroupedMarketTable";
import { RunwayMeteorologyPanel } from "@/components/dashboard/scan-terminal/RunwayMeteorologyPanel";
import { rowName, pct, money, temp, edgeClass } from "@/components/dashboard/scan-terminal/utils";

function createEmptyAccess(loading = true): ProAccessState {
  return {
    loading,
    authenticated: false,
    userId: null,
    subscriptionActive: false,
    subscriptionPlanCode: null,
    subscriptionExpiresAt: null,
    subscriptionTotalExpiresAt: null,
    subscriptionQueuedDays: 0,
    points: 0,
    error: null,
  };
}

function createLocalAccess(): ProAccessState {
  return {
    loading: false,
    authenticated: true,
    userId: "local-dev",
    subscriptionActive: true,
    subscriptionPlanCode: "local-full-access",
    subscriptionExpiresAt: "2099-12-31T23:59:59Z",
    subscriptionTotalExpiresAt: "2099-12-31T23:59:59Z",
    subscriptionQueuedDays: 0,
    points: 999_999,
    error: null,
  };
}



const TERM = {
  cityContract: { en: "City / Contract", zh: "城市 / 合约" },
  live: { en: "Live", zh: "实测" },
  deb: { en: "DEB", zh: "DEB" },
  mkt: { en: "Mkt", zh: "市场" },
  edge: { en: "Edge", zh: "优势" },
  liq: { en: "Liq", zh: "流动性" },
  signal: { en: "Signal", zh: "信号" },
  searchPlaceholder: { en: "Search city, contract, station, or signal", zh: "搜索城市、合约、站点或信号" },
  weatherContracts: { en: "Weather Contracts", zh: "天气合约" },
  approvedSignals: { en: "Approved Signals", zh: "已确认信号" },
  selectedContractMonitor: { en: "Selected Contract Monitor", zh: "选中合约监控" },
  probabilityDistribution: { en: "Probability Distribution", zh: "概率分布" },
  marketList: { en: "Market List", zh: "市场列表" },
  watchlist: { en: "Watchlist", zh: "观察列表" },
  rows: { en: "Rows", zh: "行数" },
  avgEdge: { en: "Avg Edge", zh: "平均优势" },
  liquidity: { en: "Liquidity", zh: "流动性" },
  intradayPerformance: { en: "Intraday Performance", zh: "日内表现" },
  spread: { en: "Spread", zh: "价差" },
  model: { en: "Model", zh: "模型" },
  noData: { en: "No data", zh: "无数据" },
  noDistributionData: { en: "No distribution data", zh: "无分布数据" },
  selectContract: {
    en: "Select a weather contract to inspect model edge, market price, and live evidence.",
    zh: "选择天气合约以查看模型优势、市场价格和实况证据。",
  },
  signInToContinue: { en: "Sign in to continue", zh: "请先登录" },
  signInHint: {
    en: "The terminal is only available to registered users. Please sign in or create an account.",
    zh: "决策台仅对注册用户开放。请登录或创建账号。",
  },
  logIn: { en: "Log in", zh: "登录" },
  createAccount: { en: "Create an account", zh: "注册账号" },
  learnAbout: { en: "Learn about PolyWeather", zh: "了解 PolyWeather" },
  proAccessRequired: { en: "Pro Access Required", zh: "需要付费订阅" },
  proDesc: {
    en: "The PolyWeather terminal is a paid product. Subscribe to unlock real-time weather-market intelligence.",
    zh: "PolyWeather 决策台为付费产品。订阅以解锁实时天气市场情报。",
  },
  subscriptionTerms: {
    en: "Billed monthly. Cancel anytime. Payment via USDC on Polygon.",
    zh: "按月计费，随时可取消。通过 Polygon 链 USDC 支付。",
  },
  month: { en: "/ month", zh: "/ 月" },
  subscribeNow: { en: "Subscribe Now — $10/mo", zh: "立即订阅 — $10/月" },
  subscribePrompt: {
    en: "You need an active subscription to access the terminal.",
    zh: "你需要开通有效订阅才能访问决策台。",
  },
  backToProduct: { en: "Back to product overview", zh: "返回产品介绍页" },
  dashboard: { en: "PolyWeather Terminal", zh: "PolyWeather 交易决策台" },
  refresh: { en: "Refresh", zh: "刷新" },
  switchLang: { en: "Switch to Chinese", zh: "切换到英文" },
  globalWeatherFactors: { en: "Global Weather Factors", zh: "全球天气因子" },
  heat: { en: "Heat", zh: "高温风险" },
  active: { en: "Active", zh: "活跃" },
  watch: { en: "Watch", zh: "观察" },
  tradable: { en: "Tradable", zh: "可交易" },
  primary: { en: "Primary", zh: "主信号" },
  ai: { en: "AI", zh: "AI" },
  closed: { en: "Closed", zh: "已关闭" },
  terminalStatus: { en: "Terminal Status", zh: "终端状态" },
  tsData: { en: "Data", zh: "数据" },
  tsAccess: { en: "Access", zh: "访问权限" },
  tsLayout: { en: "Layout", zh: "布局" },
  tsLayoutValue: { en: "Multi-panel grid", zh: "多面板网格" },
  tsDataLive: { en: "live", zh: "实时" },
  tsAccessPaid: { en: "paid", zh: "付费" },
} as const;

function t(key: keyof typeof TERM, isEn: boolean) {
  return isEn ? TERM[key].en : TERM[key].zh;
}

function decisionLabel(row?: ScanOpportunityRow | null) {
  const raw =
    row?.ai_decision ||
    row?.v4_metar_decision ||
    row?.action ||
    row?.signal_status ||
    "";
  const value = String(raw || "").toLowerCase();
  if (value.includes("approve")) return "Approve";
  if (value.includes("veto")) return "Veto";
  if (value.includes("watch")) return "Watch";
  if (value.includes("downgrade")) return "Downgrade";
  if (row?.tradable) return "Tradable";
  return "Monitor";
}

function decisionClass(label: string) {
  const l = label.toLowerCase();
  if (l.includes("approve") || l.includes("active") || l.includes("活跃")) {
    return "bg-emerald-50 border-emerald-200 text-emerald-700";
  }
  if (l.includes("watch") || l.includes("观察") || l.includes("monitor")) {
    return "bg-amber-50 border-amber-200 text-amber-700";
  }
  if (l.includes("veto") || l.includes("downgrade") || l.includes("closed") || l.includes("关闭")) {
    return "bg-slate-50 border-slate-200 text-slate-500";
  }
  return "bg-blue-50 border-blue-200 text-blue-700";
}


function SparkArea({
  color = "#2563eb",
  data,
  isEn = true,
}: {
  color?: string;
  data: { v: number }[];
  isEn?: boolean;
}) {
  if (!data.length) {
    return (
      <div className="flex h-full items-center justify-center text-xs text-slate-400">
        {t("noData", isEn)}
      </div>
    );
  }
  return (
    <ResponsiveContainer width="100%" height="100%">
      <AreaChart data={data} margin={{ top: 2, right: 0, left: 0, bottom: 2 }}>
        <defs>
          <linearGradient id={`fill-${color}`} x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stopColor={color} stopOpacity={0.18} />
            <stop offset="100%" stopColor={color} stopOpacity={0.02} />
          </linearGradient>
        </defs>
        <Area
          type="monotone"
          dataKey="v"
          stroke={color}
          strokeWidth={2}
          fill={`url(#fill-${color})`}
          dot={false}
          isAnimationActive={false}
        />
      </AreaChart>
    </ResponsiveContainer>
  );
}

function ProbabilityDistributionChart({
  points,
  isEn = true,
}: {
  points?: ScanOpportunityRow["distribution_preview"];
  isEn?: boolean;
}) {
  if (!points?.length) {
    return (
      <div className="flex h-full items-center justify-center text-xs text-slate-400">
        {t("noDistributionData", isEn)}
      </div>
    );
  }
  const chartData = points.map((p) => ({
    label: p.label || "",
    model: Number((p.model_probability ?? 0) * 100),
    market: Number((p.market_probability ?? 0) * 100),
  }));
  return (
    <ResponsiveContainer width="100%" height="100%">
      <ReBarChart data={chartData} margin={{ top: 4, right: 4, left: 0, bottom: 4 }}>
        <CartesianGrid strokeDasharray="3 3" stroke="#e2e8f0" />
        <XAxis
          dataKey="label"
          tick={{ fontSize: 11, fill: "#64748b" }}
          axisLine={{ stroke: "#e2e8f0" }}
          tickLine={false}
        />
        <YAxis
          tick={{ fontSize: 11, fill: "#64748b" }}
          axisLine={false}
          tickLine={false}
          tickFormatter={(v) => `${v}%`}
        />
        <Tooltip
          contentStyle={{
            borderRadius: 4,
            border: "1px solid #e2e8f0",
            fontSize: 12,
            fontFamily: "monospace",
          }}
          formatter={(value: unknown) =>
            `${Number(value).toFixed(1)}%`
          }
        />
        <Bar dataKey="model" fill="#2563eb" radius={[2, 2, 0, 0]} name={t("model", isEn)} />
        <Bar dataKey="market" fill="#059669" radius={[2, 2, 0, 0]} name={t("mkt", isEn)} />
      </ReBarChart>
    </ResponsiveContainer>
  );
}

function PolyWeatherTerminal({
  generatedText,
  isEn,
  locale,
  onRefresh,
  refreshing,
  rows,
  selectedRow,
  setSelectedRow,
  toggleLocale,
  userLocalTime,
  searchQuery,
  setSearchQuery,
  searchInputRef,
}: {
  generatedText: string;
  isEn: boolean;
  locale: "zh-CN" | "en-US";
  onRefresh: () => void;
  refreshing: boolean;
  rows: ScanOpportunityRow[];
  selectedRow: ScanOpportunityRow | null;
  setSelectedRow: (row: ScanOpportunityRow) => void;
  toggleLocale: () => void;
  userLocalTime: string;
  searchQuery: string;
  setSearchQuery: (val: string) => void;
  searchInputRef: React.RefObject<HTMLInputElement | null>;
}) {
  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      const activeEl = document.activeElement;
      const isInputFocused =
        activeEl &&
        (activeEl.tagName === "INPUT" ||
          activeEl.tagName === "TEXTAREA" ||
          (activeEl instanceof HTMLElement && activeEl.isContentEditable));
      if (e.key === "/" && !isInputFocused) {
        e.preventDefault();
        searchInputRef.current?.focus();
        searchInputRef.current?.select();
      }
      if (e.key === "Escape" && activeEl === searchInputRef.current) {
        setSearchQuery("");
        searchInputRef.current?.blur();
      }
    };
    window.addEventListener("keydown", handleKeyDown);
    return () => window.removeEventListener("keydown", handleKeyDown);
  }, [searchInputRef, setSearchQuery]);
  const [navExpanded, setNavExpanded] = useState(false);
  const [activeNavKey, setActiveNavKey] = useState<string>("contracts");
  const [selectedRegionKey, setSelectedRegionKey] = useState<string>("all");

  const NAV_ITEMS = [
    { key: "contracts", Icon: Table2, labelEn: "Contracts", labelZh: "天气合约" },
    { key: "signals", Icon: LineChart, labelEn: "Signals", labelZh: "交易信号" },
    { key: "analytics", Icon: BarChart3, labelEn: "Analytics", labelZh: "分析图表" },
    { key: "watchlist", Icon: Gauge, labelEn: "Watchlist", labelZh: "自选监控" },
    { key: "alerts", Icon: Bell, labelEn: "Alerts", labelZh: "实时预警" },
    { key: "markets", Icon: Activity, labelEn: "Markets", labelZh: "市场概览" },
  ];

  const regionTabs = useMemo(() => {
    return [
      { key: "all", labelEn: "ALL", labelZh: "全部" },
      ...TRADING_REGIONS.map((r) => ({
        key: r.key,
        labelEn: r.labelEn.toUpperCase(),
        labelZh: r.labelZh,
      })),
    ];
  }, [isEn]);

  const filteredRegionRows = useMemo(() => {
    if (selectedRegionKey === "all") return rows;
    return rows.filter((row) => String(row.trading_region).toLowerCase() === selectedRegionKey);
  }, [rows, selectedRegionKey]);

  const approveRows = useMemo(() => {
    return filteredRegionRows
      .filter((row) => ["Approve", "Tradable"].includes(decisionLabel(row)))
      .slice(0, 8);
  }, [filteredRegionRows]);

  const watchRows = useMemo(() => {
    return filteredRegionRows
      .filter((row) => decisionLabel(row) === "Watch" || !row.tradable)
      .slice(0, 8);
  }, [filteredRegionRows]);

  const selectedSignal = selectedRow ? getSignalState(selectedRow) : "data" as const;
  const selectedLabel = selectedRow ? getSignalLabel(selectedSignal, isEn) : "";

  const continentGroups = useMemo(
    () => buildContinentGroups(filteredRegionRows, isEn),
    [filteredRegionRows, isEn]
  );
  const [mobileTab, setMobileTab] = useState<string>("active_signals");
  const mobileActiveGroup = useMemo(
    () => continentGroups.find((g) => g.key === mobileTab) || continentGroups[0],
    [continentGroups, mobileTab]
  );
  useEffect(() => {
    if (continentGroups.length > 0 && !continentGroups.find((g) => g.key === mobileTab)) {
      setMobileTab(continentGroups[0].key);
    }
  }, [continentGroups, mobileTab]);

  const avgEdge = useMemo(() => {
    const list = filteredRegionRows;
    return list.reduce((sum, row) => sum + Number(row.edge_percent || 0), 0) / Math.max(list.length, 1);
  }, [filteredRegionRows]);

  const totalLiquidity = useMemo(() => {
    const list = filteredRegionRows;
    return list.reduce(
      (sum, row) => sum + Number(row.book_liquidity || row.market_liquidity || row.volume || 0),
      0
    );
  }, [filteredRegionRows]);

  return (
    <div className="flex h-screen w-full overflow-hidden bg-[#e9edf3] text-[#202833]">
      <aside
        className={clsx(
          "flex shrink-0 flex-col bg-[#11161d] py-3 text-slate-400 transition-all duration-200",
          navExpanded ? "w-[172px] items-start px-3" : "w-[52px] items-center gap-2",
        )}
      >
        {/* Logo row */}
        <div className={clsx(
          "flex items-center w-full",
          navExpanded ? "gap-3 mb-3 px-1" : "justify-center mb-2",
        )}>
          <Link
            href="/"
            className="block h-7 w-7 shrink-0 overflow-hidden rounded transition hover:opacity-90"
            title="PolyWeather"
          >
            <img src="/apple-touch-icon.png" alt="PolyWeather" className="h-full w-full object-cover" />
          </Link>
          {navExpanded && (
            <span className="text-sm font-black text-white tracking-tight truncate">
              PolyWeather
            </span>
          )}
        </div>

        {/* Toggle button */}
        <button
          type="button"
          onClick={() => setNavExpanded((prev) => !prev)}
          className={clsx(
            "flex items-center gap-3 transition-colors hover:text-white",
            navExpanded
              ? "w-full h-8 px-1 mb-2"
              : "grid h-9 w-full place-items-center mb-2",
          )}
        >
          {navExpanded ? (
            <>
              <ChevronLeft size={14} />
              <span className="text-[11px] font-bold uppercase tracking-wide text-slate-500">
                {isEn ? "Collapse" : "收起"}
              </span>
            </>
          ) : (
            <Menu size={18} />
          )}
        </button>

        {/* Nav items */}
        {NAV_ITEMS.map(({ key, Icon, labelEn, labelZh }) => {
          const isActive = activeNavKey === key;
          return (
            <button
              key={key}
              type="button"
              onClick={() => { setActiveNavKey(key); }}
              className={clsx(
                "flex items-center gap-3 transition-colors rounded",
                navExpanded
                  ? "w-full h-9 px-2 text-left"
                  : "grid h-9 w-full place-items-center border-l-4",
                isActive
                  ? navExpanded
                    ? "bg-white/8 text-white"
                    : "border-blue-500 bg-white/5 text-white"
                  : navExpanded
                    ? "hover:bg-white/5 hover:text-white"
                    : "border-transparent hover:bg-white/5 hover:text-white",
              )}
              title={isEn ? labelEn : labelZh}
            >
              <Icon size={16} className="shrink-0" />
              {navExpanded && (
                <span className="text-xs font-semibold whitespace-nowrap">
                  {isEn ? labelEn : labelZh}
                </span>
              )}
            </button>
          );
        })}
      </aside>

      <div className="flex min-w-0 flex-1 flex-col">
        <header className="flex h-12 shrink-0 items-center justify-between bg-[#11161d] border-b border-[#242f3d] px-4 text-white">
          <div className="flex min-w-0 items-center gap-4">
            <div className="flex h-8 min-w-[320px] items-center gap-2 rounded border border-[#2d3846] bg-[#1e2630] px-2.5 text-slate-300">
              <Search size={14} className="text-slate-400" />
              <input
                ref={searchInputRef}
                type="text"
                value={searchQuery}
                onChange={(e) => setSearchQuery(e.target.value)}
                placeholder={t("searchPlaceholder", isEn)}
                className="w-full bg-transparent text-xs font-semibold text-white placeholder-slate-500 outline-none"
              />
              {searchQuery && (
                <button
                  type="button"
                  onClick={() => {
                    setSearchQuery("");
                    searchInputRef.current?.focus();
                  }}
                  className="text-slate-400 hover:text-white text-xs"
                >
                  ✕
                </button>
              )}
              <kbd className="ml-auto rounded border border-slate-600 bg-[#2a3543] px-1.5 py-0.5 text-[9px] font-mono text-slate-400">
                /
              </kbd>
            </div>
            <div className="hidden items-center gap-1.5 text-[10px] font-bold uppercase text-slate-500 lg:flex tracking-wider">
              <Activity size={13} />
              {t("dashboard", isEn)}
            </div>
          </div>
          <div className="flex items-center gap-3 text-xs text-slate-400">
            <span className="hidden font-mono md:inline text-slate-500">{userLocalTime}</span>
            <Link
              href="/account"
              className="grid h-7 w-7 place-items-center rounded-full bg-slate-700 border border-slate-600 text-slate-200 hover:bg-slate-600 hover:text-white transition-colors"
              title="User Account"
            >
              <UserRound size={13} />
            </Link>
          </div>
        </header>

        <main className="min-h-0 flex-1 overflow-hidden flex flex-col p-2 bg-[#eef2f6]">
          {/* Mobile layout */}
          <div className="flex flex-col gap-2 lg:hidden overflow-auto flex-1 pb-6">
            <MobileRegionTabs
              activeTab={mobileTab}
              groups={continentGroups}
              isEn={isEn}
              onSelectTab={setMobileTab}
            />
            <div className="space-y-2 px-1">
              {mobileActiveGroup?.rows.map((row) => (
                <MobileCityCard
                  key={row.id}
                  row={row}
                  isEn={isEn}
                  onClick={setSelectedRow}
                />
              ))}
            </div>
            {/* Mobile Selected Row Detail */}
            {selectedRow && (
              <div className="rounded-lg border border-slate-200 bg-white p-4 shadow-sm">
                <h3 className="text-sm font-black text-slate-900 mb-2">{rowName(selectedRow)}</h3>
                <div className="grid grid-cols-2 gap-2 text-xs">
                  {[
                    ["Obs", temp(selectedRow.current_temp, selectedRow.temp_symbol)],
                    ["High", temp(selectedRow.current_max_so_far, selectedRow.temp_symbol)],
                    ["DEB", temp(selectedRow.deb_prediction, selectedRow.temp_symbol)],
                    ["Gap", temp(selectedRow.signed_gap ?? selectedRow.gap_to_target, selectedRow.temp_symbol)],
                    ["Edge", pct(selectedRow.edge_percent)],
                    ["Market", formatPrice(selectedRow.midpoint, selectedRow.ask, selectedRow.bid)],
                  ].map(([label, value]) => (
                    <div key={label} className="rounded border border-slate-200 bg-slate-50 p-2">
                      <div className="text-[10px] font-black uppercase text-slate-500">{label}</div>
                      <div className="font-mono font-bold text-slate-900">{value}</div>
                    </div>
                  ))}
                </div>
              </div>
            )}
          </div>

          {/* Desktop layout */}
          <div className="hidden lg:grid lg:grid-cols-[1.1fr_1.65fr_0.95fr] h-full gap-2 min-h-0">
            {/* Column 1 */}
            <div className="flex flex-col gap-2 min-h-0 h-full">
              {/* Koyfin-style Region Selector */}
              <div className="flex items-center gap-1 overflow-x-auto bg-white border border-[#d2d9e2] rounded-[4px] p-1 shrink-0 scrollbar-none">
                {regionTabs.map((tab) => {
                  const isActive = selectedRegionKey === tab.key;
                  return (
                    <button
                      key={tab.key}
                      type="button"
                      onClick={() => setSelectedRegionKey(tab.key)}
                      className={clsx(
                        "px-2.5 py-1 text-[10px] font-bold uppercase tracking-wider rounded-[3px] transition-all whitespace-nowrap",
                        isActive
                          ? "bg-blue-600 text-white shadow-sm"
                          : "text-slate-500 hover:bg-slate-100 hover:text-slate-800"
                      )}
                    >
                      {isEn ? tab.labelEn : tab.labelZh}
                    </button>
                  );
                })}
              </div>

              {activeNavKey === "signals" ? (
                <>
                  <Panel title={t("approvedSignals", isEn)} className="flex-1 min-h-0">
                    <div className="divide-y divide-slate-100">
                      {approveRows.map((row) => (
                        <button
                          key={row.id}
                          type="button"
                          onClick={() => setSelectedRow(row)}
                          className={clsx(
                            "grid w-full grid-cols-[1fr_auto] items-center gap-3 px-3 py-2 text-left hover:bg-slate-50 transition-colors",
                            selectedRow?.id === row.id && "bg-blue-50/70"
                          )}
                        >
                          <span>
                            <b className="block text-xs font-bold text-slate-800">{rowName(row)}</b>
                            <small className="text-[10px] text-slate-400 block truncate max-w-[200px]">
                              {row.ai_reason_zh || row.ai_city_thesis_zh || row.target_label || "--"}
                            </small>
                          </span>
                          <span className={clsx("font-mono text-xs font-bold", edgeClass(row.edge_percent))}>
                            {pct(row.edge_percent)}
                          </span>
                        </button>
                      ))}
                      {approveRows.length === 0 && (
                        <div className="p-4 text-center text-xs text-slate-400">
                          {isEn ? "No approved signals in this timezone" : "该时区暂无已确认信号"}
                        </div>
                      )}
                    </div>
                  </Panel>

                  <Panel title={t("probabilityDistribution", isEn)} className="h-[250px] shrink-0">
                    <div className="p-3 h-full">
                      <ProbabilityDistributionChart points={selectedRow?.distribution_preview} isEn={isEn} />
                    </div>
                  </Panel>
                </>
              ) : (
                <>
                  <Panel title={isEn ? "Weather Contracts" : "天气合约"}>
                    <div className="grid grid-cols-3 border-b border-slate-200 text-center bg-[#f8f9fa] shrink-0">
                      <div className="py-2 border-r border-slate-200">
                        <div className="text-[10px] font-bold uppercase text-slate-400">
                          {t("rows", isEn)}
                        </div>
                        <div className="font-mono text-base font-black text-slate-800">{filteredRegionRows.length}</div>
                      </div>
                      <div className="py-2 border-r border-slate-200">
                        <div className="text-[10px] font-bold uppercase text-slate-400">
                          {t("avgEdge", isEn)}
                        </div>
                        <div className={clsx("font-mono text-base font-black", edgeClass(avgEdge))}>
                          {pct(avgEdge)}
                        </div>
                      </div>
                      <div className="py-2">
                        <div className="text-[10px] font-bold uppercase text-slate-400">
                          {t("liquidity", isEn)}
                        </div>
                        <div className="font-mono text-base font-black text-slate-800">
                          {money(totalLiquidity)}
                        </div>
                      </div>
                    </div>
                    <div className="flex-1 min-h-0 overflow-auto">
                      <GroupedMarketTable
                        groups={continentGroups}
                        isEn={isEn}
                        selectedId={selectedRow?.id}
                        onSelect={setSelectedRow}
                      />
                    </div>
                  </Panel>

                  <Panel title={t("approvedSignals", isEn)} className="h-[210px] shrink-0">
                    <div className="divide-y divide-slate-100">
                      {(approveRows.length ? approveRows : rows.slice(0, 5)).map((row) => (
                        <button
                          key={row.id}
                          type="button"
                          onClick={() => setSelectedRow(row)}
                          className={clsx(
                            "grid w-full grid-cols-[1fr_auto] items-center gap-3 px-3 py-1.5 text-left hover:bg-slate-50 transition-colors",
                            selectedRow?.id === row.id && "bg-blue-50/70"
                          )}
                        >
                          <span>
                            <b className="block text-xs font-bold text-slate-800">{rowName(row)}</b>
                            <small className="text-[10px] text-slate-400 block truncate max-w-[200px]">
                              {row.ai_reason_zh || row.ai_city_thesis_zh || row.target_label || "--"}
                            </small>
                          </span>
                          <span className={clsx("font-mono text-xs font-bold", edgeClass(row.edge_percent))}>
                            {pct(row.edge_percent)}
                          </span>
                        </button>
                      ))}
                    </div>
                  </Panel>
                </>
              )}
            </div>

            {/* Column 2 */}
            <div className="flex flex-col gap-2 min-h-0 h-full">
              <Panel title={t("selectedContractMonitor", isEn)} className="shrink-0">
                <div className="grid gap-4 p-3 lg:grid-cols-[1fr_200px]">
                  <div>
                    <div className="flex flex-wrap items-center gap-2">
                      <h1 className="text-lg font-black leading-tight text-slate-800">
                        {rowName(selectedRow)}
                      </h1>
                      <span
                        className={clsx(
                          "rounded border px-1.5 py-0.5 text-[10px] font-bold",
                          selectedSignal === "active" ? "border-emerald-200 bg-emerald-50 text-emerald-700" :
                          selectedSignal === "watch" ? "border-amber-200 bg-amber-50 text-amber-700" :
                          selectedSignal === "closed" ? "border-slate-200 bg-slate-50 text-slate-500" :
                          "border-red-200 bg-red-50 text-red-700",
                        )}
                      >
                        {selectedLabel}
                      </span>
                    </div>
                    <p className="mt-1.5 text-[11px] leading-relaxed text-slate-500">
                      {isEn
                        ? selectedRow?.ai_city_thesis_en || selectedRow?.ai_reason_en || selectedRow?.market_question || t("selectContract", isEn)
                        : selectedRow?.ai_city_thesis_zh || selectedRow?.ai_reason_zh || selectedRow?.market_question || t("selectContract", isEn)}
                    </p>
                    <div className="mt-3 grid grid-cols-2 gap-1.5 md:grid-cols-4">
                      {[
                        [t("live", isEn), temp(selectedRow?.current_max_so_far ?? selectedRow?.current_temp, selectedRow?.temp_symbol)],
                        [t("deb", isEn), temp(selectedRow?.deb_prediction, selectedRow?.temp_symbol)],
                        [t("model", isEn), pct(selectedRow?.model_probability ?? selectedRow?.model_event_probability)],
                        [t("mkt", isEn), pct(selectedRow?.market_probability ?? selectedRow?.market_event_probability)],
                      ].map(([label, value]) => (
                        <div key={String(label)} className="rounded border border-slate-200 bg-slate-50 px-2 py-1">
                          <div className="text-[9px] font-bold uppercase text-slate-400">
                            {label}
                          </div>
                          <div className="font-mono text-[13px] font-bold text-slate-800">{value}</div>
                        </div>
                      ))}
                    </div>
                  </div>
                  <div className="rounded border border-slate-200 bg-[#f8f9fa] p-2.5 flex flex-col justify-between">
                    <div>
                      <div className="mb-1 text-[9px] font-bold uppercase text-slate-400">
                        {t("intradayPerformance", isEn)}
                      </div>
                      <div className="h-12">
                        <SparkArea
                          isEn={isEn}
                          color={
                            Number(selectedRow?.edge_percent || 0) >= 0
                              ? "#059669"
                              : "#dc2626"
                          }
                          data={
                            selectedRow?.distribution_preview?.map((p) => ({
                              v:
                                typeof p === "number"
                                  ? p
                                  : p.model_probability ?? 0,
                            })) || []
                          }
                        />
                      </div>
                    </div>
                    <div className="mt-1.5 grid grid-cols-2 gap-1 text-[10px] font-bold">
                      <span className="rounded border border-slate-200 bg-white p-1 text-center">
                        {t("edge", isEn)} <b className={clsx("block font-mono", edgeClass(selectedRow?.edge_percent))}>{pct(selectedRow?.edge_percent)}</b>
                      </span>
                      <span className="rounded border border-slate-200 bg-white p-1 text-center text-slate-700">
                        {t("spread", isEn)} <b className="block font-mono">{pct(selectedRow?.spread)}</b>
                      </span>
                    </div>
                  </div>
                </div>
              </Panel>

              <Panel title={isEn ? "Runway Temperature Trend & Option Threshold Lines" : "实时气象走势与期权阈值线"} className="flex-1 min-h-0">
                <RunwayMeteorologyPanel row={selectedRow} isEn={isEn} />
              </Panel>
            </div>

            {/* Column 3 */}
            <div className="flex flex-col gap-2 min-h-0 h-full">
              <Panel title={t("watchlist", isEn)} className="flex-1 min-h-0">
                <div className="divide-y divide-slate-100">
                  {(watchRows.length ? watchRows : rows.slice(0, 8)).map((row) => (
                    <button
                      key={row.id}
                      type="button"
                      onClick={() => setSelectedRow(row)}
                      className="grid w-full grid-cols-[1fr_auto] gap-3 px-3 py-1.5 text-left hover:bg-slate-50 transition-colors"
                    >
                      <span>
                        <b className="block text-xs font-bold text-slate-800">{rowName(row)}</b>
                        <small className="text-[10px] text-slate-400 block truncate max-w-[150px]">
                          {row.airport || row.trading_region_label || row.local_time || "--"}
                        </small>
                      </span>
                      <span className={clsx("font-mono text-xs font-bold", edgeClass(row.signed_gap ?? row.gap))}>
                        {pct(row.signed_gap ?? row.gap)}
                      </span>
                    </button>
                  ))}
                </div>
              </Panel>

              <Panel title={t("globalWeatherFactors", isEn)} className="shrink-0">
                <div className="grid grid-cols-3 gap-1.5 p-2 text-center">
                  {[
                    [t("heat", isEn), rows.filter((r) => r.risk_level === "high").length],
                    [t("active", isEn), rows.filter((r) => r.active).length],
                    [t("tradable", isEn), rows.filter((r) => r.tradable).length],
                    [t("primary", isEn), rows.filter((r) => r.is_primary_signal).length],
                    [t("ai", isEn), rows.filter((r) => r.ai_decision).length],
                    [t("closed", isEn), rows.filter((r) => r.closed).length],
                  ].map(([label, value]) => (
                    <div key={String(label)} className="rounded border border-slate-200 bg-slate-50 p-1.5">
                      <div className="font-mono text-sm font-bold text-slate-800">{value}</div>
                      <div className="text-[9px] font-bold uppercase text-slate-400 truncate">
                        {label}
                      </div>
                    </div>
                  ))}
                </div>
              </Panel>

              <Panel title={t("terminalStatus", isEn)} className="shrink-0">
                <div className="space-y-1.5 p-2 text-[11px]">
                  <div className="flex items-center justify-between rounded border border-slate-200 bg-slate-50 px-2.5 py-1.5">
                    <span className="font-bold text-slate-500">{t("tsData", isEn)}</span>
                    <span className="font-mono text-emerald-700 font-bold">
                      {generatedText || t("tsDataLive", isEn)}
                    </span>
                  </div>
                  <div className="flex items-center justify-between rounded border border-slate-200 bg-slate-50 px-2.5 py-1.5">
                    <span className="font-bold text-slate-500">{t("tsAccess", isEn)}</span>
                    <span className="font-mono text-blue-700 font-bold">{t("tsAccessPaid", isEn)}</span>
                  </div>
                  <div className="flex items-center justify-between rounded border border-slate-200 bg-slate-50 px-2.5 py-1.5">
                    <span className="font-bold text-slate-500">{t("tsLayout", isEn)}</span>
                    <span className="font-mono text-slate-700 font-medium">{t("tsLayoutValue", isEn)}</span>
                  </div>
                </div>
              </Panel>
            </div>
          </div>
        </main>
      </div>
    </div>
  );
}



function ScanTerminalScreen() {
  const [proAccess, setProAccess] = useState<ProAccessState>(() =>
    createEmptyAccess(true),
  );
  const [locale, setLocale] = useState<"zh-CN" | "en-US">("zh-CN");
  const isEn = locale === "en-US";
  const toggleLocale = () =>
    setLocale((prev) => (prev === "zh-CN" ? "en-US" : "zh-CN"));
  const [hydrated, setHydrated] = useState(false);
  const [localFullAccess, setLocalFullAccess] = useState(false);
  const canUseLocalFullAccess = hydrated && localFullAccess;
  const isAuthenticated =
    hydrated && (proAccess.authenticated || canUseLocalFullAccess);
  const isPro =
    hydrated && (proAccess.subscriptionActive || canUseLocalFullAccess);
  const userLocalTime = useUserLocalClock();
  const { themeMode } = useScanTerminalTheme();

  useEffect(() => {
    let cancelled = false;
    setHydrated(true);
    setLocale(getInitialLocaleFromNavigator());
    const localAccess = isBrowserLocalFullAccess();
    setLocalFullAccess(localAccess);
    if (localAccess) {
      setProAccess(createLocalAccess());
      return () => {
        cancelled = true;
      };
    }
    if (typeof fetch !== "function") {
      setProAccess(createEmptyAccess(false));
      return () => {
        cancelled = true;
      };
    }
    fetch("/api/auth/me", {
      cache: "no-store",
      headers: { Accept: "application/json" },
    })
      .then(async (response) => {
        if (!response.ok) throw new Error(`HTTP ${response.status}`);
        return response.json() as Promise<{
          authenticated?: boolean;
          user_id?: string | null;
          subscription_active?: boolean | null;
          subscription_plan_code?: string | null;
          subscription_expires_at?: string | null;
          subscription_total_expires_at?: string | null;
          subscription_queued_days?: number | null;
          points?: number | null;
        }>;
      })
      .then((payload) => {
        if (cancelled) return;
        setProAccess({
          loading: false,
          authenticated: Boolean(payload.authenticated),
          userId: payload.user_id ?? null,
          subscriptionActive: payload.subscription_active === true,
          subscriptionPlanCode: payload.subscription_plan_code ?? null,
          subscriptionExpiresAt: payload.subscription_expires_at ?? null,
          subscriptionTotalExpiresAt:
            payload.subscription_total_expires_at ??
            payload.subscription_expires_at ??
            null,
          subscriptionQueuedDays: Math.max(
            0,
            Number(payload.subscription_queued_days ?? 0),
          ),
          points: Number(payload.points ?? 0),
          error: null,
        });
      })
      .catch((error) => {
        if (cancelled) return;
        setProAccess({
          ...createEmptyAccess(false),
          error: String(error),
        });
      });
    return () => {
      cancelled = true;
    };
  }, []);

  const { refreshScanTerminalManually, scanLoading, terminalData } =
    useScanTerminalQuery({
      isPro,
      proAccessLoading: !hydrated || (proAccess.loading && !canUseLocalFullAccess),
    });
  const rows = useMemo(
    () => sortRowsByUserTime(terminalData?.rows || []),
    [terminalData?.rows],
  );
  const [searchQuery, setSearchQuery] = useState("");
  const searchInputRef = useRef<HTMLInputElement>(null);

  const filteredRows = useMemo(() => {
    if (!searchQuery.trim()) return rows;
    const q = searchQuery.toLowerCase().trim();
    return rows.filter((row) => {
      const haystack = [
        row.city,
        row.city_display_name,
        row.display_name,
        row.airport,
        row.trading_region_label,
        row.trading_region_label_zh,
        row.market_question,
        row.target_label,
        row.ai_decision,
        row.v4_metar_decision,
        row.signal_status,
      ]
        .filter(Boolean)
        .map((v) => String(v).toLowerCase());
      return haystack.some((s) => s.includes(q));
    });
  }, [rows, searchQuery]);

  const [selectedId, setSelectedId] = useState<string | null>(null);
  const selectedRow = useMemo(
    () => filteredRows.find((row) => row.id === selectedId) || filteredRows[0] || null,
    [filteredRows, selectedId],
  );
  const generatedText = useRelativeTime(terminalData?.generated_at ?? null);

  if (!hydrated || (proAccess.loading && !canUseLocalFullAccess)) {
    return (
      <ScanTerminalLoadingScreen
        isEn={isEn}
        rootClassName={scanRootClass}
        themeMode={themeMode}
        userLocalTime={userLocalTime}
      />
    );
  }

  if (!isAuthenticated || !isPro) {
    return (
      <ProductAccessRequired
        isAuthenticated={isAuthenticated}
        isEn={isEn}
        userLocalTime={userLocalTime}
      />
    );
  }

  return (
    <PolyWeatherTerminal
      generatedText={generatedText || ""}
      isEn={isEn}
      locale={locale}
      onRefresh={refreshScanTerminalManually}
      refreshing={scanLoading}
      rows={filteredRows}
      selectedRow={selectedRow}
      setSelectedRow={(row) => setSelectedId(row.id)}
      toggleLocale={toggleLocale}
      userLocalTime={userLocalTime}
      searchQuery={searchQuery}
      setSearchQuery={setSearchQuery}
      searchInputRef={searchInputRef}
    />
  );
}

export function ScanTerminalDashboard() {
  return <ScanTerminalScreen />;
}
