import { notFound } from "next/navigation";
import { EmployeeDetail } from "@/components/employees/EmployeeDetail";
import { currentUserId } from "@/lib/auth/session";
import { withUser } from "@/lib/db";
import { todayIso } from "@/lib/format";
import { breadcrumbLabel } from "@/lib/org";
import { loadEmployeeDetail } from "@/lib/employee-detail-data";

type PageProps = { params: Promise<{ id: string }> };

export default async function EmployeeDetailPage({ params }: PageProps) {
  const { id } = await params;
  const today = todayIso();

  // Was die Akte liest und in wie vielen Rundreisen, steht in
  // lib/employee-detail-data.ts.
  const data = await withUser(await currentUserId(), (tx) => loadEmployeeDetail(tx, id, today));

  if (!data) notFound();
  const { employee, line, reports, history, dependents, notes, orgMaps, placement, kostenstelle, onboarding, offboarding, openPositions, byId } = data;

  return (
    <EmployeeDetail
      employee={employee}
      placement={
        placement && {
          positionNumber: placement.positionNumber,
          jobTitle: placement.jobTitle,
          isChief: placement.isChief,
          current: placement.current,
        }
      }
      breadcrumb={breadcrumbLabel(orgMaps, placement?.orgUnitId)}
      kostenstelle={kostenstelle}
      onboarding={onboarding}
      offboarding={offboarding}
      manager={(line?.acting_manager_id ? byId.get(line.acting_manager_id) : null) ?? null}
      // Nur wenn eine Vertretung im Spiel ist — sonst stünde dieselbe Person
      // zweimal da.
      formalManager={
        line?.formal_manager_id && line.formal_manager_id !== line.acting_manager_id
          ? (byId.get(line.formal_manager_id) ?? null)
          : null
      }
      directReports={reports.flatMap((r) => {
        const e = byId.get(r.employee_id);
        return e ? [e] : [];
      })}
      history={history ?? []}
      dependents={dependents ?? []}
      notes={notes ?? []}
      locations={orgMaps.locationList}
      openPositions={openPositions}
      today={today}
    />
  );
}