import { notFound, redirect } from "next/navigation";
import { prisma } from "@/lib/db";
import { currentStaff } from "@/lib/staffsession";
import { approvalQueue } from "@/lib/managerdata";
import ApprovalsScreen from "@/components/screens/Approvals";

export const dynamic = "force-dynamic";

export default async function MyApprovals() {
  const sess = await currentStaff();
  if (!sess) redirect("/my/signin");
  // Whoever a request names decides it, team or no team. A request reaches somebody who manages
  // nobody more than one way: the linen room re-addresses one that arrived without an approver
  // (request.reassign only checks the person is on the register, not that anybody reports to
  // them), or a manager's last report is moved to somebody else while their request is still
  // awaiting. This is the same query Home counts for its "waiting on you" banner, and the banner
  // is the only door — the staff nav has no approvals tab — so turning these people away left a
  // colleague blocked behind a 404 nobody could clear.
  const rows = await approvalQueue(sess);
  if (!rows.length) {
    // Nothing waiting and nobody reporting to them gets nothing, not an empty queue: an empty
    // approvals screen implies they might one day have a team, which is a question for the linen
    // room and not something this app should imply an answer to.
    const reports = await prisma.staff.count({ where: { managerId: sess.staffId } });
    if (!reports) notFound();
  }
  // Which of the waiting requests are for the manager themselves. Some of these now are — the
  // rule against approving your own uniform has been relaxed for the case the owner named — and
  // the screen sets those apart so nobody approves their own by accident and works out later that
  // they did. Whether a self-approval is allowed at all is the server's call and is not re-tested
  // here; this only asks the database which of the rows it already let through are the reader's
  // own, by the request's subject, which is the same fact the record is written from. The rows are
  // scoped to this manager and to `awaiting` already, so the lookup is over a handful of ids.
  const ownIds = rows.length
    ? (
        await prisma.request.findMany({
          where: { id: { in: rows.map((r) => r.id) }, subjectId: sess.staffId },
          select: { id: true },
        })
      ).map((r) => r.id)
    : [];
  return <ApprovalsScreen rows={rows} ownIds={ownIds} />;
}