ubiquitous-invention/apps/web/app/(app)/[workspaceSlug]/whiteboards/[whiteboardId]/page.tsx

"use client";

import { useParams, useRouter } from "next/navigation";
import dynamic from "next/dynamic";
import { ArrowLeft } from "lucide-react";
import { Button } from "@/components/ui/button";
import { api } from "@/lib/trpc";

const WhiteboardCanvas = dynamic(
  () => import("@/components/whiteboard/canvas").then((m) => m.WhiteboardCanvas),
  { ssr: false, loading: () => <div className="flex h-full items-center justify-center text-muted-foreground">Loading whiteboard...</div> },
);

export default function WhiteboardDetailPage() {
  const params = useParams();
  const router = useRouter();
  const workspaceSlug = params.workspaceSlug as string;
  const whiteboardId = params.whiteboardId as string;

  const { data: wb } = api.objects.getById.useQuery(
    { workspace: workspaceSlug, id: whiteboardId },
    { enabled: Boolean(whiteboardId) && Boolean(workspaceSlug) },
  );

  return (
    <div className="flex h-full flex-col">
      <div className="flex shrink-0 items-center gap-3 border-b px-4 py-2">
        <Button
          variant="ghost"
          size="icon"
          className="h-8 w-8"
          onClick={() => router.push(`/${workspaceSlug}/whiteboards`)}
        >
          <ArrowLeft className="size-4" />
        </Button>
        <h1 className="text-sm font-medium">{(wb as { title?: string } | undefined)?.title ?? "Whiteboard"}</h1>
      </div>
      <div className="flex-1">
        <WhiteboardCanvas documentId={whiteboardId} className="h-full" />
      </div>
    </div>
  );
}