import { Link, useRouterState } from "@tanstack/react-router";
import { CalendarCheck, Wallet, UserRound, Bell, LogOut, Menu, Sparkles, Ticket } from "lucide-react";
import { useState, type ReactNode } from "react";
import { cn } from "@/lib/utils";
import { useAppState } from "@/lib/store";
import { notificar, pedirPermisoNotificaciones } from "@/lib/notificaciones";
import { BrandLogo, BrandMark } from "@/components/BrandLogo";
import { useInstalarPWA } from "@/lib/pwa-install";

const NAV = [
  { to: "/vuelos", label: "Vuelos", icon: Sparkles },
  { to: "/reserva", label: "Reservar", icon: Ticket },
  { to: "/reservaciones", label: "Reservas", icon: CalendarCheck },
  { to: "/comisiones", label: "Comisiones", icon: Wallet },
  { to: "/perfil", label: "Perfil", icon: UserRound },
] as const;

export function AppShell({
  title,
  subtitle,
  children,
}: {
  title: string;
  subtitle?: string;
  children: ReactNode;
}) {
  const { pathname } = useRouterState({ select: (s) => s.location });
  const { socio } = useAppState();
  const [sidebarAbierto, setSidebarAbierto] = useState(true);
  const { instalada, instalar } = useInstalarPWA();

  const activarNotificaciones = async () => {
    const estado = await pedirPermisoNotificaciones();
    notificar(
      "Notificaciones activas",
      estado === "granted"
        ? "Te avisaremos de reservaciones confirmadas y comisiones acreditadas."
        : "Verás los avisos dentro de la app.",
    );
  };

  return (
    <div className="min-h-screen bg-background font-sans">
      {/* Sidebar retráctil — solo desktop/tablet */}
      <aside
        className={cn(
          "fixed inset-y-0 left-0 z-30 hidden flex-col bg-sidebar p-4 text-sidebar-foreground transition-all duration-300 lg:flex",
          sidebarAbierto ? "w-64" : "w-20",
        )}
      >
        <div className="px-2 py-3">
          <BrandLogo soloIcono={!sidebarAbierto} invertido />
        </div>

        <nav className="mt-6 flex flex-1 flex-col gap-1">
          {NAV.map(({ to, label, icon: Icon }) => {
            const activo = pathname.startsWith(to);
            return (
              <Link
                key={to}
                to={to}
                className={cn(
                  "flex items-center gap-3 rounded-2xl px-3 py-3 text-sm font-medium transition-colors",
                  activo
                    ? "bg-brand text-brand-foreground"
                    : "text-sidebar-foreground/70 hover:bg-sidebar-accent hover:text-sidebar-foreground",
                )}
              >
                <Icon className="size-5 shrink-0" />
                {sidebarAbierto && label}
              </Link>
            );
          })}
        </nav>

        <button
          onClick={() => setSidebarAbierto((v) => !v)}
          className="flex items-center gap-3 rounded-2xl px-3 py-3 text-sm text-sidebar-foreground/70 transition-colors hover:bg-sidebar-accent"
        >
          <Menu className="size-5" />
          {sidebarAbierto && "Contraer"}
        </button>
      </aside>

      <div className={cn("transition-all duration-300", sidebarAbierto ? "lg:pl-64" : "lg:pl-20")}>
        {/* Encabezado */}
        <header className="sticky top-0 z-20 border-b border-border/70 bg-background/85 backdrop-blur-xl">
          <div className="mx-auto flex max-w-6xl items-center justify-between gap-4 px-4 py-4 sm:px-6">
            <div className="min-w-0">
              <h1 className="truncate text-xl font-bold tracking-tight sm:text-2xl">{title}</h1>
              {subtitle && (
                <p className="truncate text-sm text-muted-foreground">{subtitle}</p>
              )}
            </div>
            <div className="flex items-center gap-2">
              {!instalada && (
                <button
                  onClick={async () => {
                    const ok = await instalar();
                    if (!ok)
                      notificar(
                        "Instalar la app",
                        "Usa “Agregar a pantalla de inicio” desde el menú de tu navegador.",
                      );
                  }}
                  className="flex items-center gap-2 rounded-2xl border border-border bg-card px-3 py-2.5 text-sm font-semibold shadow-soft transition-all hover:-translate-y-0.5 hover:shadow-lift active:scale-95"
                >
                  <span className="grid size-6 place-items-center rounded-lg bg-ink p-0.5">
                    <BrandMark className="h-4" />
                  </span>
                  <span className="hidden sm:inline">Instalar</span>
                </button>
              )}
              <button
                onClick={activarNotificaciones}
                aria-label="Activar notificaciones"
                className="grid size-11 place-items-center rounded-2xl border border-border bg-card text-foreground shadow-soft transition-all hover:-translate-y-0.5 hover:bg-muted active:scale-95"
              >
                <Bell className="size-5" />
              </button>

              <Link
                to="/perfil"
                className="hidden items-center gap-2 rounded-2xl bg-ink px-3 py-2.5 text-sm font-medium text-ink-foreground sm:flex"
              >
                <span className="grid size-6 place-items-center rounded-full bg-brand text-[11px] font-bold text-brand-foreground">
                  {(socio?.nombre ?? "S").charAt(0).toUpperCase()}
                </span>
                <span className="max-w-28 truncate">{socio?.nombre ?? "Socio"}</span>
              </Link>
            </div>
          </div>
        </header>

        <main className="mx-auto max-w-6xl px-4 pb-28 pt-5 sm:px-6 lg:pb-12">{children}</main>
      </div>

      {/* Bottom navigation — móvil */}
      <nav className="fixed inset-x-0 bottom-0 z-30 border-t border-border bg-card/95 pb-[env(safe-area-inset-bottom)] backdrop-blur-xl lg:hidden">
        <ul className="mx-auto grid max-w-md grid-cols-4">
          {NAV.map(({ to, label, icon: Icon }) => {
            const activo = pathname.startsWith(to);
            return (
              <li key={to}>
                <Link
                  to={to}
                  className="flex flex-col items-center gap-1 px-2 py-3 text-[11px] font-medium"
                >
                  <span
                    className={cn(
                      "grid size-10 place-items-center rounded-2xl transition-colors",
                      activo ? "bg-brand text-brand-foreground" : "text-muted-foreground",
                    )}
                  >
                    <Icon className="size-5" />
                  </span>
                  <span className={activo ? "text-foreground" : "text-muted-foreground"}>{label}</span>
                </Link>
              </li>
            );
          })}
        </ul>
      </nav>
    </div>
  );
}

export function SalirButton() {
  return (
    <span className="inline-flex items-center gap-2 text-sm">
      <LogOut className="size-4" /> Cerrar sesión
    </span>
  );
}