import {
  createRootRouteWithContext,
  createRoute,
  createRouter,
  Link,
  Outlet,
  redirect,
} from "@tanstack/react-router";
import { lazy, Suspense, useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import { useQuery, useQueryClient } from "@tanstack/react-query";
import type { Lang, Permission, SessionUser, Theme } from "./api.js";
import {
  can,
  closeShift,
  fetchShiftReport,
  fetchVersion,
  logout,
  openShift,
  setLanguagePref,
  setThemePref,
  setFontScalePref,
  FONT_SCALE_MIN,
  FONT_SCALE_MAX,
  FONT_SCALE_STEP,
} from "./api.js";
import { qk, queryClient } from "./lib/query.js";
import { Modal } from "./ui/Modal.js";
import { Spinner } from "./ui/Spinner.js";
import { setLanguage } from "./lib/i18n/index.js";
import { applyTheme, applyFontScale } from "./lib/theme.js";
import { useLiveFeed } from "./lib/use-live-feed.js";
import { inTauri } from "./lib/origin.js";
import { useShift } from "./lib/use-shift.js";
import { DeviceFooter } from "./ui/DeviceFooter.js";
import { StatusDot } from "./ui/StatusDot.js";
import { BoothScreen } from "./BoothScreen.js";
import { SetupWizard } from "./SetupWizard.js";
import { TariffComposer } from "./TariffComposer.js";
import { TariffLab } from "./TariffLab.js";
import { SubscriptionManager } from "./SubscriptionManager.js";
import { SubscriptionPlansManager } from "./SubscriptionPlansManager.js";
import { SiteSettings } from "./SiteSettings.js";
import { UsersManager } from "./UsersManager.js";
import { RolesManager } from "./RolesManager.js";
import { ShiftsHistory } from "./ShiftsHistory.js";
import { DrawerManager } from "./DrawerManager.js";
import { CARD_PAYMENTS_ENABLED } from "./lib/features.js";
import { LogsViewer } from "./LogsViewer.js";
import { BackupSettings } from "./BackupSettings.js";
import { WEB_MODULES } from "./modules/index.js";
import { moduleOn } from "./lib/modules.js";
import { RecycleBin } from "./RecycleBin.js";
import { Profile } from "./Profile.js";
// Reports pulls in Recharts (~heavy) — lazy-loaded so it stays OUT of the booth's
// initial bundle and only downloads when an admin opens /setup/reports.
const Reports = lazy(() => import("./Reports.js").then((m) => ({ default: m.Reports })));

// Code-based TanStack Router (no file-based codegen — the app is small enough that
// an explicit tree is clearer). The router context carries the signed-in user and
// a setter so route guards can redirect by role. The root renders the terminal
// chrome (nav + user + live status) and opens the booth WebSocket once, app-wide.

export interface RouterContext {
  user: SessionUser | null;
  setUser: (u: SessionUser | null) => void;
}

// Exported so a deep component (e.g. the booth pay modal) can read the signed-in user
// from route context without prop-threading through every layer.
export const rootRoute = createRootRouteWithContext<RouterContext>()({
  component: RootLayout,
});

function NavLink({ to, label }: { to: string; label: string }) {
  return (
    <Link
      to={to}
      className="px-2 py-1 text-[0.6875rem] uppercase tracking-wider text-term-muted rounded-term hover:text-term-text [&.active]:text-term-amber [&.active]:bg-term-panel-2"
    >
      {label}
    </Link>
  );
}

/** A tab inside the Setup layout. `exact` (activeOptions) so the Devices tab at
 *  `/setup` doesn't stay highlighted on the child tabs. */
function SetupTab({ to, label, exact = false }: { to: string; label: string; exact?: boolean }) {
  return (
    <Link
      to={to}
      activeOptions={{ exact }}
      className="border-b-2 border-transparent px-3 py-2 text-[0.75rem] uppercase tracking-wider text-term-muted hover:text-term-text [&.active]:border-term-amber [&.active]:text-term-amber"
    >
      {label}
    </Link>
  );
}

/** The running deploy's "<branch>-<short-sha>" (matches the Komodo Stack's TAG in
 *  komodo/resources.toml), gated the same as the "Park" tab (site:read) since it's the
 *  same kind of read-only app metadata. Renders nothing if the value isn't known (e.g. a
 *  local/dev build with no CI-supplied BUILD_VERSION) rather than showing an empty badge. */
function VersionBadge() {
  const q = useQuery({ queryKey: ["version"], queryFn: fetchVersion, staleTime: Infinity });
  const version = q.data?.buildVersion;
  if (!version) return null;
  return <span className="ml-auto shrink-0 pl-3 text-[0.7rem] text-term-muted">{version}</span>;
}

/** The installed Tauri app's own "vX.Y.Z" (from tauri.conf.json, synced to the git tag by
 *  release.yml — see wiki/decisions/desktop-shell-tauri.md) — the client's version, distinct
 *  from VersionBadge's SERVER build. No-op / renders nothing in a browser (there's no Tauri
 *  API to call). Was invisible before this: an operator had no way to tell which desktop
 *  build was actually installed short of reading the update-available prompt. */
function DesktopVersionBadge() {
  const [version, setVersion] = useState<string | null>(null);
  useEffect(() => {
    if (!inTauri()) return;
    let cancelled = false;
    void import("@tauri-apps/api/app").then(({ getVersion }) =>
      getVersion().then((v) => {
        if (!cancelled) setVersion(v);
      }),
    );
    return () => {
      cancelled = true;
    };
  }, []);
  if (!version) return null;
  return <span className="ml-auto shrink-0 pl-3 text-[0.7rem] text-term-muted">app v{version}</span>;
}

/** Desktop-only "change which server this install talks to" control. No-op /
 *  renders nothing in a browser (the concept doesn't apply — same-origin).
 *  Simplest correct action: clear the saved backend URL and reload, which
 *  drops the app back to ConnectScreen (see App.tsx) to re-enter it — this
 *  mirrors clearing the session (logout → back to Login), not an inline
 *  editor, since repointing the app is a rare, deliberate admin action. */
function DesktopServerButton() {
  const { t } = useTranslation();
  const [confirming, setConfirming] = useState(false);
  const [busy, setBusy] = useState(false);
  if (!inTauri()) return null;
  return (
    <>
      <button
        type="button"
        className="btn btn-ghost btn-sm ml-2"
        onClick={() => setConfirming(true)}
      >
        {t("connect.changeServer")}
      </button>
      {confirming && (
        <Modal open onClose={() => setConfirming(false)} title={t("connect.changeServer")} width="max-w-sm">
          <div className="text-[0.8125rem]">
            <p className="text-term-muted">{t("connect.changeServerConfirm")}</p>
            <div className="mt-3 flex justify-end gap-2">
              <button type="button" className="btn btn-sm" onClick={() => setConfirming(false)} disabled={busy}>
                {t("subs.cancel")}
              </button>
              <button
                type="button"
                className="btn btn-sm btn-danger"
                disabled={busy}
                onClick={async () => {
                  setBusy(true);
                  const { clearBackendUrl } = await import("./lib/backend-config.js");
                  await clearBackendUrl();
                  window.location.reload();
                }}
              >
                {busy ? <Spinner /> : t("connect.changeServer")}
              </button>
            </div>
          </div>
        </Modal>
      )}
    </>
  );
}

/** Setup layout — the config hub. Renders a permission-gated tab bar and the active
 *  tab's screen via <Outlet>. Each tab is a child route (its own URL + guard), so
 *  deep links and the back button work and a denied tab redirects to the booth. */
function SetupLayout() {
  const { user } = rootRoute.useRouteContext();
  const { t } = useTranslation();
  const show = (perm: Permission) => can(user, perm);
  return (
    <div className="">
      <nav className="mb-4 flex flex-wrap items-center gap-1 border-b border-term-border">
        {show("site:update") && <SetupTab to="/setup" label={t("nav.devices")} exact />}
        {show("tariff:read") && <SetupTab to="/setup/tariff" label={t("nav.tariff")} />}
        {show("site:read") && <SetupTab to="/setup/site" label={t("nav.site")} />}
        {show("user:read") && <SetupTab to="/setup/users" label={t("nav.users")} />}
        {show("role:read") && <SetupTab to="/setup/roles" label={t("nav.roles")} />}
        {show("recyclebin:read") && <SetupTab to="/setup/recycle-bin" label={t("nav.recycleBin")} />}
        {show("log:read") && <SetupTab to="/setup/logs" label={t("nav.logs")} />}
        {show("backup:read") && <SetupTab to="/setup/backup" label={t("nav.backup")} />}
        {show("site:read") && <VersionBadge />}
        <DesktopVersionBadge />
        <DesktopServerButton />
      </nav>
      <Outlet />
    </div>
  );
}

/** Subscriptions layout — a standalone top-level section (its own header nav entry),
 *  with tabs for the subscriber catalog and the plan catalog. Each tab is a gated
 *  child route; an operator with only subscription:read sees just the first tab.
 *  (The tariff lab moved to /setup/tariff/lab, 2026-07-05 — it tests the tariff, so
 *  it lives with the tariff.) */
function SubscriptionsLayout() {
  const { user } = rootRoute.useRouteContext();
  const { t } = useTranslation();
  const show = (perm: Permission) => can(user, perm);
  return (
    <div className="">
      <nav className="mb-4 flex flex-wrap items-center gap-1 border-b border-term-border">
        {show("subscription:read") && <SetupTab to="/subscriptions" label={t("nav.subscriptions")} exact />}
        {show("subscription:plan") && <SetupTab to="/subscriptions/plans" label={t("nav.plans")} />}
      </nav>
      <Outlet />
    </div>
  );
}

/** Tariff layout — the rate-card hub under Setup: the composer (index) and the
 *  pricing LAB as sub-tabs. One tariff:read gate on the parent covers both. */
function TariffLayout() {
  const { t } = useTranslation();
  return (
    <div>
      <nav className="mb-2 flex flex-wrap items-center gap-1 border-b border-term-border">
        <SetupTab to="/setup/tariff" label={t("nav.tariff")} exact />
        <SetupTab to="/setup/tariff/lab" label={t("nav.tariffLab")} />
      </nav>
      <Outlet />
    </div>
  );
}

/** SQ/EN toggle. Persists the choice to the user's profile (restored on next login)
 *  and applies it immediately. Updates the router-context user so App re-syncs. */
function LanguageToggle({
  user,
  setUser,
}: {
  user: SessionUser;
  setUser: (u: SessionUser | null) => void;
}) {
  // The ACTIVE language is i18n's own state, not the router-context `user` — the
  // latter is captured at route-resolution time and does NOT re-render when we call
  // setUser, so reading `user.language` here goes stale after the first switch (the
  // highlight froze and the equality guard blocked switching back until a refresh).
  // useTranslation() subscribes to i18n's languageChanged, so this stays live.
  const { i18n } = useTranslation();
  const active = i18n.language as Lang;
  async function pick(lang: Lang) {
    if (lang === active) return;
    setLanguage(lang); // instant UI (fires i18n languageChanged → re-render)
    setUser({ ...user, language: lang }); // keep context eventually-consistent + persisted state
    try {
      await setLanguagePref(lang); // persist
    } catch {
      /* non-fatal — the choice still applies this session */
    }
  }
  return (
    <div className="flex items-center gap-0.5 text-[0.625rem] uppercase tracking-wider">
      {(["sq", "en"] as const).map((l) => (
        <button
          key={l}
          type="button"
          onClick={() => pick(l)}
          className={`rounded-term px-1.5 py-0.5 ${
            active === l ? "bg-term-panel-2 text-term-amber" : "text-term-muted hover:text-term-text"
          }`}
        >
          {l}
        </button>
      ))}
    </div>
  );
}

/** Dark/light theme toggle. Same shape as the language toggle: applies instantly,
 *  persists to the user's profile, and updates the router-context user so App
 *  re-syncs. Restored on the next login from any booth. */
function ThemeToggle({
  user,
  setUser,
}: {
  user: SessionUser;
  setUser: (u: SessionUser | null) => void;
}) {
  const { t } = useTranslation();
  // Local state for the ACTIVE theme — same reason as LanguageToggle: the router
  // context `user` doesn't re-render on setUser, so reading `user.theme` here froze
  // the highlight after one switch and blocked toggling back until a refresh. Seed
  // from the prop; update optimistically on pick. App's effect keeps the DOM in sync
  // with the persisted user on (re)login.
  const [active, setActive] = useState<Theme>(user.theme);
  async function pick(theme: Theme) {
    if (theme === active) return;
    setActive(theme);
    applyTheme(theme); // instant UI
    setUser({ ...user, theme }); // keep context eventually-consistent + persisted state
    try {
      await setThemePref(theme); // persist
    } catch {
      /* non-fatal — the choice still applies this session */
    }
  }
  return (
    <div className="flex items-center gap-0.5 text-[0.625rem] uppercase tracking-wider">
      {(["dark", "light"] as const).map((th) => (
        <button
          key={th}
          type="button"
          onClick={() => pick(th)}
          className={`rounded-term px-1.5 py-0.5 ${
            active === th ? "bg-term-panel-2 text-term-amber" : "text-term-muted hover:text-term-text"
          }`}
        >
          {t(th === "dark" ? "common.themeDark" : "common.themeLight")}
        </button>
      ))}
    </div>
  );
}

/** Header font-size control: A−/value/A+ scaling the whole UI (root font-size). Persisted
 *  to the user profile like the theme, restored on next login. Local `active` state seeded
 *  from the prop (the router context doesn't re-render on setUser); App's effect keeps the
 *  DOM in sync with the persisted user on (re)login. */
function FontScaleToggle({ user, setUser }: { user: SessionUser; setUser: (u: SessionUser | null) => void }) {
  const { t } = useTranslation();
  const [active, setActive] = useState<number>(user.fontScale);
  function step(delta: number) {
    const next = Math.min(FONT_SCALE_MAX, Math.max(FONT_SCALE_MIN, active + delta));
    if (next === active) return;
    setActive(next);
    applyFontScale(next); // instant UI
    setUser({ ...user, fontScale: next });
    void setFontScalePref(next).catch(() => {
      /* non-fatal — the choice still applies this session */
    });
  }
  const btn = "rounded-term px-1.5 py-0.5 text-term-muted hover:text-term-text disabled:opacity-40";
  return (
    <div className="flex items-center gap-0.5 text-[0.625rem] uppercase tracking-wider">
      <button type="button" className={btn} onClick={() => step(-FONT_SCALE_STEP)} disabled={active <= FONT_SCALE_MIN} title={t("common.fontSmaller")} aria-label={t("common.fontSmaller")}>
        A−
      </button>
      <span className="min-w-[2.5rem] text-center text-term-muted" title={t("common.fontSize")}>{active}%</span>
      <button type="button" className={btn} onClick={() => step(FONT_SCALE_STEP)} disabled={active >= FONT_SCALE_MAX} title={t("common.fontLarger")} aria-label={t("common.fontLarger")}>
        A+
      </button>
    </div>
  );
}

/**
 * Header shift control — the site-wide single-open shift expressed as one button:
 *  - no shift open       → "Open shift" (enabled; opens this operator's shift)
 *  - my shift open       → "Close shift" (enabled; signs + prints the Z-report)
 *  - another's shift open → disabled, labelled with who holds it (you can neither
 *    open yours nor close theirs until they hand over).
 * On open/close it invalidates the shift status, the per-shift log, and occupancy.
 */
function ShiftButton() {
  const { t } = useTranslation();
  const qc = useQueryClient();
  const { isOpen, isMine, blockedByOther, heldBy } = useShift();
  const [busy, setBusy] = useState(false);
  const [err, setErr] = useState<string | null>(null);
  // Closing a shift signs the Z-report and is irreversible, so the header button never
  // closes directly (a stray click would end the shift) — it opens a confirm modal that
  // shows the live X-report first. Opening a shift has no such risk → immediate.
  const [confirmingClose, setConfirmingClose] = useState(false);

  function onClick() {
    if (isMine) {
      setConfirmingClose(true);
    } else {
      void act("open");
    }
  }

  async function act(kind: "open" | "close") {
    setBusy(true);
    setErr(null);
    try {
      if (kind === "open") await openShift();
      else await closeShift();
      // The shift boundary moves: refresh status, the per-shift log window, drawer.
      void qc.invalidateQueries({ queryKey: qk.shift });
      void qc.invalidateQueries({ queryKey: qk.events });
      void qc.invalidateQueries({ queryKey: qk.occupancy });
    } catch (e) {
      setErr((e as Error).message);
    } finally {
      setBusy(false);
    }
  }

  // Disabled when another operator holds the shift (can't open or close).
  const label = blockedByOther
    ? t("shift.headerHeldByShort", { operator: heldBy ?? "?" })
    : isMine
      ? t("shift.headerClose")
      : t("shift.headerOpen");
  const tone = blockedByOther
    ? "border-term-border text-term-muted opacity-60 cursor-not-allowed"
    : isMine
      ? "border-term-red text-term-red hover:bg-term-red/10"
      : "border-term-green text-term-green hover:bg-term-green/10";

  return (
    <div className="flex items-center gap-1">
      <button
        type="button"
        disabled={busy || blockedByOther}
        title={blockedByOther ? t("shift.headerHeldBy", { operator: heldBy ?? "?" }) : undefined}
        onClick={onClick}
        className={`rounded-term border px-2 py-0.5 text-[0.6875rem] font-semibold uppercase tracking-wider disabled:opacity-60 ${tone}`}
      >
        {busy ? (
          <span className="inline-flex items-center gap-1.5">
            <Spinner /> {isMine ? t("shift.ending") : t("shift.opening")}
          </span>
        ) : (
          label
        )}
      </button>
      {!isOpen && (
        <span className="text-[0.625rem] uppercase tracking-wider text-term-amber">{t("shift.headerNoShift")}</span>
      )}
      {err && <span className="text-[0.625rem] text-term-red">{err}</span>}
      {confirmingClose && (
        <CloseShiftConfirm
          busy={busy}
          onCancel={() => setConfirmingClose(false)}
          onConfirm={async () => {
            await act("close");
            setConfirmingClose(false);
          }}
        />
      )}
    </div>
  );
}

/** Confirm-before-close modal for the header shift button. Fetches the live X-report so
 *  the operator SEES their takings (split by source: tickets vs subscriptions) and the
 *  expected drawer before committing the irreversible Z-report. */
function CloseShiftConfirm({
  busy,
  onCancel,
  onConfirm,
}: {
  busy: boolean;
  onCancel: () => void;
  onConfirm: () => void;
}) {
  const { t } = useTranslation();
  const q = useQuery({ queryKey: ["shift", "xreport", "close-confirm"], queryFn: fetchShiftReport });
  const x = q.data;
  const cur = x?.currency ?? null;
  const fmt = (m: number) => `${(m / 100).toLocaleString()} ${cur ?? ""}`.trim();

  return (
    <Modal open onClose={onCancel} title={t("shift.endShift")} width="max-w-md">
      <div className="text-[0.8125rem] tabular-nums">
        <p className="text-term-muted">{t("shift.endConfirm")}</p>
        {!x ? (
          <p className="mt-2 text-term-muted">{t("common.loading")}</p>
        ) : (
          <>
            <div className="mt-2 grid grid-cols-2 gap-x-6 gap-y-0.5">
              <ConfirmFigure label={t("shift.payments")} value={String(x.paymentCount)} />
              <span />
              {/* Split by source — the operator's ask: subscription money apart from tickets. */}
              <ConfirmFigure label={t("shift.srcTickets")} value={fmt(x.ticketTotalMinor)} />
              <ConfirmFigure label={t("shift.srcSubscriptions")} value={fmt(x.subscriptionTotalMinor)} />
              {/* Abonime is the subscription TOTAL (sales + out-of-window). The 'jashtë orarit'
                  part is broken out below it; subscription SALES is not (it's the remainder). */}
              <span />
              <ConfirmFigure label={t("shift.srcSubWindow")} value={fmt(x.subscriptionWindowMinor)} sub />
            </div>
            <div className="mt-2 grid grid-cols-2 gap-x-6 gap-y-0.5 border-t border-term-border pt-2">
              <ConfirmFigure label={t("shift.cash")} value={fmt(x.cashTotalMinor)} />
              {CARD_PAYMENTS_ENABLED && <ConfirmFigure label={t("shift.card")} value={fmt(x.cardTotalMinor)} />}
              {/* Drawer math made explicit: opening float + cash taken = expected drawer. */}
              <ConfirmFigure label={t("shift.openingFloat")} value={fmt(x.openingFloatMinor)} />
              <span />
              <ConfirmFigure label={t("shift.expectedDrawer")} value={fmt(x.expectedDrawerMinor)} bold />
            </div>
          </>
        )}
        <div className="mt-3 flex justify-end gap-2">
          <button type="button" className="btn btn-sm" onClick={onCancel} disabled={busy}>
            {t("subs.cancel")}
          </button>
          <button type="button" className="btn btn-sm btn-danger" onClick={onConfirm} disabled={busy || !x}>
            {busy ? (
              <span className="inline-flex items-center gap-1.5">
                <Spinner /> {t("shift.ending")}
              </span>
            ) : (
              t("shift.endShift")
            )}
          </button>
        </div>
      </div>
    </Modal>
  );
}

function ConfirmFigure({ label, value, bold, sub }: { label: string; value: string; bold?: boolean; sub?: boolean }) {
  return (
    <div className={`flex items-baseline justify-between gap-2 ${sub ? "pl-3" : ""}`}>
      <span
        className={`whitespace-nowrap text-[0.6875rem] uppercase tracking-wider ${sub ? "text-term-muted/70" : "text-term-muted"}`}
      >
        {label}
      </span>
      {/* The money/number never splits across lines (e.g. "89,650 ALL"). */}
      <span className={`whitespace-nowrap ${bold ? "font-semibold text-term-text" : "text-term-text"}`}>{value}</span>
    </div>
  );
}

function RootLayout() {
  const { user, setUser } = rootRoute.useRouteContext();
  const { t } = useTranslation();
  // Nav is gated by PERMISSION, not role — a tab shows iff the user's role grants
  // the permission its screen needs (the route guards enforce the same server-side).
  const show = (perm: Permission) => can(user, perm);
  // One app-wide WebSocket for the live feed (booth + any live widget) — but ONLY
  // for roles the server would accept (routes/ws.ts gates on report:read). A
  // merchant validator must not even attempt it: the 403'd upgrade would reconnect
  // on backoff forever and spam the server log. Same rule for the widgets that feed
  // off it (StatusDot) or make their own gated calls (ShiftButton → shift:read,
  // DeviceFooter → device:read).
  const canWatch = show("report:read");
  useLiveFeed(canWatch);

  return (
    <div className="flex h-screen flex-col bg-term-bg text-term-text">
      <header className="flex items-center gap-4 border-b border-term-border bg-term-panel px-4 py-2">
        <span className="text-sm font-bold uppercase tracking-widest text-term-amber">▮ Parking</span>
        <nav className="flex items-center gap-1">
          {show("session:read") && <NavLink to="/booth" label={t("nav.booth")} />}
          {show("shift:read") && <NavLink to="/shifts" label={t("nav.shifts")} />}
          {/* Venue-module nav entries (e.g. the Bar merchant's scan-and-validate screen,
              often that role's whole nav): shown iff the module is effective at this
              site AND the role holds the entry's permission. See lib/modules.ts. */}
          {WEB_MODULES.flatMap((m) =>
            m.nav
              .filter((n) => moduleOn(user, m.id) && show(n.perm))
              .map((n) => <NavLink key={n.to} to={n.to} label={t(n.labelKey)} />),
          )}
          {/* Drawer — record cash movements (operator) / review them (admin). Shown if the
              user can do either. See wiki/concepts/shift.md. */}
          {(show("drawer:create") || show("drawer:review")) && (
            <NavLink to="/drawer" label={t("nav.drawer")} />
          )}
          {/* Subscriptions — a standalone section (Abonimet / Planet / Lab tarife).
              Shown if the user can reach ANY of its tabs. */}
          {(show("subscription:read") || show("subscription:plan") || show("tariff:read")) && (
            <NavLink to="/subscriptions" label={t("nav.subscriptions")} />
          )}
          {/* Reports — a standalone admin section (own header entry, route /reports). */}
          {show("report:read") && <NavLink to="/reports" label={t("nav.reports")} />}
          {/* One Setup entry — its tabs hold devices/tariff/site/users/roles/logs.
              Shown if the user can reach ANY of those screens (an operator with only
              shift:read still gets in, landing on Shifts). */}
          {(show("site:update") ||
            show("tariff:read") ||
            show("site:read") ||
            show("user:read") ||
            show("role:read") ||
            show("recyclebin:read") ||
            show("backup:read") ||
            show("shift:read")) && <NavLink to="/setup" label={t("nav.setup")} />}
        </nav>
        <div className="ml-auto flex items-center gap-3">
          {user && show("shift:read") && <ShiftButton />}
          {user && <LanguageToggle user={user} setUser={setUser} />}
          {user && <ThemeToggle user={user} setUser={setUser} />}
          {user && <FontScaleToggle user={user} setUser={setUser} />}
          {canWatch && <StatusDot />}
          {user && (
            <Link
              to="/profile"
              title={t("nav.profile")}
              className="text-[0.6875rem] text-term-muted hover:text-term-text [&.active]:text-term-amber"
            >
              {user.username} · {user.roleName}
            </Link>
          )}
          <button
            type="button"
            className="btn btn-ghost btn-sm"
            onClick={async () => {
              await logout();
              setUser(null);
            }}
          >
            {t("common.logout")}
          </button>
        </div>
      </header>
      <main className="min-h-0 flex-1 overflow-auto p-3">
        <Outlet />
      </main>
      {/* Fixed device-status footer — relays, readers, cameras, printers. Its REST
          seed needs device:read (and its live updates ride the report:read WS), so
          it's hidden for roles without device visibility (e.g. merchant validators). */}
      {user && show("device:read") && <DeviceFooter />}
    </div>
  );
}

const indexRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/",
  beforeLoad: ({ context }) => {
    // A merchant-only user (validation:create without the booth's session:read)
    // lands on their scan-and-validate screen — if the validation module is on at
    // this site; everyone else on the booth.
    if (
      moduleOn(context.user, "validation") &&
      can(context.user, "validation:create") &&
      !can(context.user, "session:read")
    ) {
      throw redirect({ to: "/validate" });
    }
    throw redirect({ to: "/booth" });
  },
});

const boothRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/booth",
  component: BoothScreen,
});

// Back-compat redirects for paths that moved. Most config screens live under /setup;
// Subscriptions/Plans/Tariff-Lab were promoted OUT of /setup into the standalone
// /subscriptions section (2026-06-21) — redirect the old /setup/* paths too so existing
// bookmarks/links don't 404. (No "/subscriptions" entry: that's now a REAL route.)
const legacyRedirects = (
  [
    ["/tariff", "/setup/tariff"],
    ["/site", "/setup/site"],
    ["/users", "/setup/users"],
    ["/roles", "/setup/roles"],
    ["/shift", "/shifts"],
    ["/setup/subscriptions", "/subscriptions"],
    ["/setup/plans", "/subscriptions/plans"],
    // The tariff lab bounced twice: /setup/tariff-lab → /subscriptions/tariff-lab
    // (2026-06-21) → /setup/tariff/lab (2026-07-05, back with the tariff it tests).
    ["/setup/tariff-lab", "/setup/tariff/lab"],
    ["/subscriptions/tariff-lab", "/setup/tariff/lab"],
    ["/setup/shifts", "/shifts"],
    ["/setup/reports", "/reports"],
  ] as const
).map(([from, to]) =>
  createRoute({
    getParentRoute: () => rootRoute,
    path: from,
    beforeLoad: () => {
      throw redirect({ to });
    },
  }),
);

// Admin reports/charts — a top-level section (own header nav entry), NOT a Setup tab.
// Gated by report:read. Lazy component (Recharts) in a Suspense so it stays out of the
// booth's initial bundle.
const reportsRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/reports",
  beforeLoad: ({ context }) => requirePerm("report:read")(context),
  component: function ReportsRoute() {
    return (
      <Suspense fallback={<div className="p-3 text-term-muted">…</div>}>
        <Reports />
      </Suspense>
    );
  },
});

const shiftRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/shifts",
  component: function ShiftRoute() {
    const { user } = rootRoute.useRouteContext();
    // The shift hub: list (current/open shift on top + history) + per-shift activity log.
    // The CURRENT shift's pane carries the actions (open/close, takings), each opening a
    // modal. `canManage` = shift:create (start/end). Drawer cash movements moved to /drawer
    // (2026-07-01).
    return <ShiftsHistory user={user} canManage={can(user, "shift:create")} />;
  },
});

const drawerRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/drawer",
  // Reachable by anyone who can record OR review; the component shows the right view per
  // permission. Guard on the broader of the two (create) so a review-only admin still gets
  // in — the redirect only fires if the user has NEITHER, which the nav already hides.
  beforeLoad: ({ context }) => {
    if (!can(context.user, "drawer:create") && !can(context.user, "drawer:review")) {
      throw redirect({ to: "/booth" });
    }
  },
  component: function DrawerRoute() {
    const { user } = rootRoute.useRouteContext();
    return (
      <DrawerManager
        canCreate={can(user, "drawer:create")}
        canReview={can(user, "drawer:review")}
      />
    );
  },
});

/** Guard factory: a route requiring `perm` redirects a user who lacks it back to
 *  the booth. Same permission the server enforces — defence in depth, not the only
 *  gate. */
function requirePerm(perm: Permission) {
  return (ctx: RouterContext) => {
    if (!can(ctx.user, perm)) throw redirect({ to: "/booth" });
  };
}

// The Setup tabs in display order, each with the permission its screen needs. Used
// to land a user on the FIRST tab they may see when they open /setup without
// `site:update` (e.g. an operator who only has shift:read → goes to the standalone
// /shifts hub, which is no longer a Setup tab).
const SETUP_TABS: { to: string; perm: Permission }[] = [
  { to: "/setup", perm: "site:update" },
  { to: "/setup/tariff", perm: "tariff:read" },
  { to: "/setup/site", perm: "site:read" },
  { to: "/setup/users", perm: "user:read" },
  { to: "/setup/roles", perm: "role:read" },
  { to: "/setup/recycle-bin", perm: "recyclebin:read" },
  { to: "/shifts", perm: "shift:read" },
  { to: "/setup/logs", perm: "log:read" },
];

// /setup is a LAYOUT route (tab bar + <Outlet>); the config screens are its
// children. The layout itself has no permission gate — each child enforces its own
// (so a user who can reach ANY tab gets the hub, but only the tabs they're allowed).
const setupRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/setup",
  component: SetupLayout,
});
// Index tab = Devices (the former SetupWizard). Lives at /setup exactly. A user who
// lacks site:update (e.g. an operator) is redirected to the FIRST tab they CAN see
// rather than bounced to the booth — so "Setup" always lands somewhere useful.
const setupDevicesRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "/",
  beforeLoad: ({ context }) => {
    if (can(context.user, "site:update")) return;
    const firstOther = SETUP_TABS.find((tab) => tab.to !== "/setup" && can(context.user, tab.perm));
    throw redirect({ to: firstOther?.to ?? "/booth" });
  },
  component: () => <SetupWizard />,
});
const tariffRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "tariff",
  beforeLoad: ({ context }) => requirePerm("tariff:read")(context),
  component: TariffLayout,
});
const tariffComposerRoute = createRoute({
  getParentRoute: () => tariffRoute,
  path: "/",
  component: () => <TariffComposer />,
});
// The tariff LAB — lives with the tariff it tests (moved from /subscriptions,
// 2026-07-05). The parent's tariff:read gate covers it.
const tariffLabRoute = createRoute({
  getParentRoute: () => tariffRoute,
  path: "lab",
  component: () => <TariffLab />,
});

// --- /subscriptions — a standalone top-level section with its own tabs. The catalog
//     (index), the plan catalog, and the tariff lab live here, not under /setup. ---
const subscriptionsRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "/subscriptions",
  component: SubscriptionsLayout,
});
// Index tab = the subscriber catalog at /subscriptions exactly. A user lacking
// subscription:read is redirected to the first sub-tab they CAN see (or the booth).
const subscriptionsIndexRoute = createRoute({
  getParentRoute: () => subscriptionsRoute,
  path: "/",
  beforeLoad: ({ context }) => {
    if (can(context.user, "subscription:read")) return;
    if (can(context.user, "subscription:plan")) throw redirect({ to: "/subscriptions/plans" });
    throw redirect({ to: "/booth" });
  },
  component: function SubscriptionsRoute() {
    const { user } = rootRoute.useRouteContext();
    return <SubscriptionManager user={user} />;
  },
});
const subscriptionPlansRoute = createRoute({
  getParentRoute: () => subscriptionsRoute,
  path: "plans",
  beforeLoad: ({ context }) => requirePerm("subscription:plan")(context),
  component: () => <SubscriptionPlansManager />,
});
const siteRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "site",
  beforeLoad: ({ context }) => requirePerm("site:read")(context),
  component: function SiteRoute() {
    const { user } = rootRoute.useRouteContext();
    return <SiteSettings canEdit={can(user, "site:update")} />;
  },
});
const usersRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "users",
  beforeLoad: ({ context }) => requirePerm("user:read")(context),
  component: function UsersRoute() {
    const { user } = rootRoute.useRouteContext();
    return <UsersManager user={user} />;
  },
});
const rolesRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "roles",
  beforeLoad: ({ context }) => requirePerm("role:read")(context),
  component: function RolesRoute() {
    const { user } = rootRoute.useRouteContext();
    return <RolesManager user={user} />;
  },
});
// (Shift history lives at the standalone /shifts route — see shiftRoute. It was
// removed as a Setup tab; /setup/shifts and the old /shift both redirect there.)

// Recycle bin — restore/purge soft-deleted master data. Gated by recyclebin:read.
const recycleBinRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "recycle-bin",
  beforeLoad: ({ context }) => requirePerm("recyclebin:read")(context),
  component: function RecycleBinRoute() {
    const { user } = rootRoute.useRouteContext();
    return <RecycleBin user={user} />;
  },
});

// Diagnostic logs. Gated by log:read (an admin/diagnostic permission).
const logsRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "logs",
  beforeLoad: ({ context }) => requirePerm("log:read")(context),
  component: LogsViewer,
});

// Encrypted DB backup — status + manual run. Gated by backup:read (run by backup:create).
const backupRoute = createRoute({
  getParentRoute: () => setupRoute,
  path: "backup",
  beforeLoad: ({ context }) => requirePerm("backup:read")(context),
  component: BackupSettings,
});

// My profile — self-service for ANY signed-in user (no permission gate). Edits only
// the caller's own name/email/password. See Profile.tsx and routes/auth.ts.
const profileRoute = createRoute({
  getParentRoute: () => rootRoute,
  path: "profile",
  component: function ProfileRoute() {
    const { user, setUser } = rootRoute.useRouteContext();
    if (!user) return null;
    return <Profile user={user} setUser={setUser} />;
  },
});

const routeTree = rootRoute.addChildren([
  indexRoute,
  boothRoute,
  // Venue-module routes (e.g. /validate) — each module gates its own routes on
  // moduleOn + permission. See modules/index.ts.
  ...WEB_MODULES.flatMap((m) => m.routes(rootRoute)),
  ...legacyRedirects,
  profileRoute,
  shiftRoute,
  drawerRoute,
  reportsRoute,
  subscriptionsRoute.addChildren([
    subscriptionsIndexRoute,
    subscriptionPlansRoute,
  ]),
  setupRoute.addChildren([
    setupDevicesRoute,
    tariffRoute.addChildren([tariffComposerRoute, tariffLabRoute]),
    siteRoute,
    usersRoute,
    rolesRoute,
    recycleBinRoute,
    logsRoute,
    backupRoute,
  ]),
]);

export const router = createRouter({
  routeTree,
  context: { user: null, setUser: () => {} },
  defaultPreload: "intent",
});

declare module "@tanstack/react-router" {
  interface Register {
    router: typeof router;
  }
}