import { Outlet, useLocation } from "react-router";

import { ErrorBoundary } from "@/client/components/error-boundary";
import { Footer } from "@/client/components/footer";
import { Header } from "@/client/components/header";
import { useSessionWithInitialPending } from "@/client/lib/auth-client";
import { useSessionQueryCacheBoundary } from "@/client/lib/query";

// Pure unauthenticated paths — sign-in, auth error, the invite acceptance
// flow. `/` is auth-aware (marketing vs launcher) so it's not in this
// set; the header variant for `/` is chosen by session state below.
const ALWAYS_PUBLIC_PATHS = ["/sign-in", "/auth-error", "/privacy", "/terms"];

const isPublicPath = (pathname: string): boolean => {
  if (ALWAYS_PUBLIC_PATHS.includes(pathname)) return true;
  if (pathname.startsWith("/invite/")) return true;
  return false;
};

export const AppShell = () => {
  const { pathname } = useLocation();
  const session = useSessionWithInitialPending();
  useSessionQueryCacheBoundary(session.data?.user.id ?? null, session.isPending);
  // Public chrome (brand + sign-in pill) for unauthenticated paths and
  // for the marketing landing when no session exists. `/` keeps neutral
  // loading chrome only during the initial auth resolution so later
  // refetches don't swap mounted content back to a placeholder.
  const variant =
    pathname === "/" && session.isInitialPending
      ? "loading"
      : isPublicPath(pathname) || (pathname === "/" && !session.data)
        ? "public"
        : "app";

  return (
    <div className="relative z-10 flex min-h-screen flex-col">
      <a
        href="#main-content"
        className="sr-only focus:not-sr-only focus:fixed focus:top-4 focus:left-4 focus:z-[200] focus:rounded-lg focus:bg-zinc-900 focus:px-4 focus:py-2 focus:text-accent-400 focus:ring-2 focus:ring-accent-500/50"
      >
        Skip to content
      </a>
      <Header variant={variant} />
      <main id="main-content" className="flex-1">
        <div className="mx-auto max-w-7xl px-4 py-6 sm:px-6">
          {/* Resetting on `pathname` means a runtime error on /account/apps
              clears as soon as the user navigates away — no full page
              reload needed to recover. */}
          <ErrorBoundary resetKey={pathname}>
            <div className="animate-slide-up">
              <Outlet />
            </div>
          </ErrorBoundary>
        </div>
      </main>
      <Footer />
    </div>
  );
};