NextEdu/src/app/(dashboard)/messages/[id]/page.tsx

import { notFound } from "next/navigation"
import { after } from "next/server"
import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import { getMessageById, markMessageAsRead } from "@/modules/messaging/data-access"
import { MessageDetail } from "@/modules/messaging/components/message-detail"

export const dynamic = "force-dynamic"

export const metadata = {
  title: "Message Detail",
}

export default async function MessageDetailPage({
  params,
}: {
  params: Promise<{ id: string }>
}) {
  const ctx = await requirePermission(Permissions.MESSAGE_READ)
  const { id } = await params

  const message = await getMessageById(id, ctx.userId)
  if (!message) notFound()

  // Auto-mark as read when viewed by the receiver (non-blocking)
  if (!message.isRead && message.receiverId === ctx.userId) {
    after(() => markMessageAsRead(id, ctx.userId))
  }

  return (
    <div className="flex h-full flex-col p-8">
      <MessageDetail message={message} currentUserId={ctx.userId} />
    </div>
  )
}