import { auth } from "@/auth";
import { db } from "@/lib/db";
import { hasPermission } from "@/lib/permissions";
import { CREWING_ENABLED } from "@/lib/feature-flags";
import { redirect, notFound } from "next/navigation";
import { CandidatesManager } from "./candidates-manager";
import type { Metadata } from "next";

export const metadata: Metadata = { title: "Candidates" };

export default async function CandidatesPage() {
  if (!CREWING_ENABLED) notFound();

  const session = await auth();
  if (!session?.user) redirect("/login");
  if (!hasPermission(session.user.role, "manage_candidates")) redirect("/dashboard");

  const [candidates, ranks] = await Promise.all([
    db.crewMember.findMany({
      // Active employees live in the Crew directory (Phase 4); the pool is
      // everyone still a candidate / ex-hand (spec §8.6 R9).
      where: { status: { not: "EMPLOYEE" } },
      orderBy: { createdAt: "desc" },
      include: {
        appliedRank: { select: { name: true } },
        currentRank: { select: { name: true } },
      },
    }),
    db.rank.findMany({ where: { isActive: true }, orderBy: { name: "asc" }, select: { id: true, code: true, name: true } }),
  ]);

  const rows = candidates.map((c) => ({
    id: c.id,
    name: c.name,
    source: c.source,
    type: c.type,
    status: c.status,
    appliedRankId: c.appliedRankId,
    appliedRank: c.appliedRank?.name ?? null,
    currentRankId: c.currentRankId,
    currentRank: c.currentRank?.name ?? null,
    experienceMonths: c.experienceMonths,
    vesselTypeExperience: c.vesselTypeExperience,
    email: c.email,
    phone: c.phone,
    notes: c.notes,
    hasCv: Boolean(c.cvKey),
  }));

  // B3 AC2 — ex-hands (proven crew) surface above new candidates by default.
  // Stable sort preserves the createdAt-desc order within each group.
  rows.sort((a, b) => Number(b.status === "EX_HAND") - Number(a.status === "EX_HAND"));

  return <CandidatesManager candidates={rows} ranks={ranks} />;
}
