"use client";

import { useSession } from "@/lib/auth-client";
import { hasCompletedHealthProfile } from "@/lib/hellth-data";
import { trpc } from "@/lib/trpc";
import { usePathname, useRouter } from "next/navigation";
import { useEffect } from "react";

const PLATFORM_ALLOWED_PREFIXES = [
  "/",
  "/aktivitaeten",
  "/benutzer",
  "/einstellungen",
  "/erinnerungen",
  "/hellfireclub",
  "/einkaufsliste",
  "/lebensmittel",
  "/maerkte",
  "/onboarding",
  "/planung",
  "/rezepte",
  "/ziele",
  "/wochenbudget",
  "/sicherheit/2fa-setup",
];

export function AuthGuard({ children }: { children: React.ReactNode }) {
  const { data: session, isPending } = useSession();
  const router = useRouter();
  const pathname = usePathname();

  const platformAdminEmails = (
    process.env.NEXT_PUBLIC_PLATFORM_ADMIN_EMAILS ?? "admin@onl1.eu"
  )
    .split(",")
    .map((email) => email.trim().toLowerCase())
    .filter(Boolean);
  const userRole = ((session?.user as { role?: string } | undefined)?.role ?? "").toLowerCase();
  const userEmail = (session?.user?.email ?? "").toLowerCase();
  const isPlatformAdmin =
    userRole === "admin" ||
    userRole === "platform_admin" ||
    platformAdminEmails.includes(userEmail);
  const securityQuery = trpc.security.status.useQuery(undefined, {
    enabled: !!session && !isPending,
    retry: false,
  });
  const requiresTwoFactorSetup = securityQuery.data?.requiresTwoFactorSetup ?? false;

  useEffect(() => {
    if (!isPending && !session) {
      router.push("/login");
      return;
    }

    if (!isPending && session) {
      if (securityQuery.isLoading) return;

      if (requiresTwoFactorSetup && !pathname.startsWith("/sicherheit/2fa-setup")) {
        router.push("/sicherheit/2fa-setup");
        return;
      }

      if (isPlatformAdmin) {
        const isAllowed = PLATFORM_ALLOWED_PREFIXES.some((prefix) =>
          prefix === "/" ? pathname === "/" : pathname.startsWith(prefix),
        );
        if (!isAllowed) {
          router.push("/");
          return;
        }
      } else {
        const userKey = session.user.id ?? session.user.email ?? null;
        const onboardingComplete = hasCompletedHealthProfile(userKey);
        if (!onboardingComplete && !pathname.startsWith("/onboarding")) {
          router.push("/onboarding");
          return;
        }
        if (pathname.startsWith("/benutzer") || pathname.startsWith("/einstellungen")) {
          router.push("/");
        }
      }
    }
  }, [
    session,
    isPending,
    isPlatformAdmin,
    pathname,
    router,
    requiresTwoFactorSetup,
    securityQuery.isLoading,
  ]);

  if (isPending || (!!session && securityQuery.isLoading)) {
    return (
      <div className="min-h-screen flex items-center justify-center bg-gray-50">
        <div className="flex flex-col items-center gap-3">
          <div className="w-8 h-8 border-2 border-[#0F766E] border-t-transparent rounded-full animate-spin" />
          <p className="text-sm text-gray-400">Laden...</p>
        </div>
      </div>
    );
  }

  if (!session) return null;

  return <>{children}</>;
}