msgapp/src/app/posts/[id]/page.tsx

import { notFound } from "next/navigation";
import { headers } from "next/headers";
import { HeroBanner } from "@/app/components/HeroBanner";

// 서버 전용 페이지: params가 Promise일 수 있어 안전 언랩 후 절대 URL로 fetch합니다.
export default async function PostDetail({ params }: { params: any }) {
  const p = params?.then ? await params : params;
  const id = p.id as string; // slug 값이 들어옴
  const h = await headers();
  const host = h.get("host") ?? "localhost:3000";
  const proto = h.get("x-forwarded-proto") ?? "http";
  const base = process.env.NEXT_PUBLIC_BASE_URL || `${proto}://${host}`;
  const res = await fetch(new URL(`/api/posts/${id}`, base).toString(), { cache: "no-store" });
  if (!res.ok) return notFound();
  const { post } = await res.json();
  const createdAt = post?.createdAt ? new Date(post.createdAt) : null;
  return (
    <div className="space-y-6">
      {/* 상단 배너 */}
      <section>
        <HeroBanner />
      </section>

      {/* 본문 카드 */}
      <section className="rounded-xl overflow-hidden bg-white">
        <header className="px-4 py-3 border-b border-neutral-200">
          <h1 className="text-xl md:text-2xl font-bold text-neutral-900 break-words">{post.title}</h1>
          {createdAt && (
            <p className="mt-1 text-xs text-neutral-500">{createdAt.toLocaleString()}</p>
          )}
        </header>
        <div className="p-4 md:p-6">
          <div className="prose max-w-none whitespace-pre-wrap break-words">{post.content}</div>
        </div>
        <footer className="px-4 py-3 border-t border-neutral-200 flex gap-2">
          <form action={`/api/posts/${post.id}/recommend`} method="post">
            <button type="submit" className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm hover:bg-neutral-800">추천</button>
          </form>
          <form action={`/api/posts/${post.id}/report`} method="post">
            <button type="submit" className="h-9 px-4 rounded-md border border-neutral-300 bg-white text-sm hover:bg-neutral-100">신고</button>
          </form>
        </footer>
      </section>
    </div>
  );
}