import Link from "next/link";
import { ClipboardList } from "lucide-react";
import { dismissApplication } from "@/actions/admin-applications";
import { StatusCard } from "@/components/admin/dashboard";
import { prisma } from "@/lib/prisma";
import { getTranslations } from "next-intl/server";

export const dynamic = "force-dynamic";

type ApplicationRow = {
  id: bigint;
  userId: number;
  rankId: number;
  content: string;
  createdAt: Date | null;
};

function formatDate(d: Date | null): string {
  return d ? d.toISOString().slice(0, 16).replace("T", " ") : "—";
}

export default async function AdminApplications() {
  const t = await getTranslations("pages.admin.applications");
  let applications: ApplicationRow[];
  try {
    applications = await prisma.websiteStaffApplications.findMany({
      orderBy: { createdAt: "desc" },
      take: 100,
    });
  } catch {
    applications = [];
  }

  // Resolve applicant usernames (no relation defined on the model).
  const userMap = new Map<number, string>();
  if (applications.length > 0) {
    try {
      const ids = Array.from(new Set(applications.map((a) => a.userId)));
      const users = await prisma.user.findMany({
        where: { id: { in: ids } },
        select: { id: true, username: true },
      });
      for (const u of users) userMap.set(u.id, u.username);
    } catch {
      // no DB — fall back to raw ids
    }
  }

  return (
    <main>
      <div className="flex items-center gap-3 mb-6">
        <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-[var(--color-primary)]/20 to-[var(--color-primary)]/5 grid place-items-center">
          <ClipboardList size={20} className="text-[var(--color-primary)]" />
        </div>
        <div>
          <h1 className="m-0 text-xl font-extrabold text-[var(--color-text)]">{t("title")}</h1>
          <p className="m-0 text-xs text-[var(--color-text-muted)] mt-0.5">{t("subtitle")}</p>
        </div>
      </div>

      <div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
        <StatusCard
          label={t("pending")}
          value={applications.length}
          state={applications.length > 0 ? "warn" : "ok"}
          icon="📨"
        />
      </div>

      <section className="mt-6">
        <h2 className="admin-section-title">{t("applicationsTitle", { count: applications.length })}</h2>
        {applications.length === 0 ? (
          <div className="admin-empty">{t("noApplications")}</div>
        ) : (
          <div className="grid grid-cols-1 gap-4 md:grid-cols-2">
            {applications.map((a) => {
              const username = userMap.get(a.userId);
              return (
                <article key={String(a.id)} className="admin-card p-3">
                  <div className="flex items-baseline justify-between gap-2 mb-1">
                    <h3 className="m-0 text-sm font-semibold text-[var(--color-text)]">
                      {username ? (
                        <Link href={`/admin/users/${a.userId}`}>{username}</Link>
                      ) : (
                        <>{t("userNumber", { id: a.userId })}</>
                      )}
                    </h3>
                    <span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--color-primary)]/18 text-[var(--color-text)]">
                      {t("rankLabel", { rank: a.rankId })}
                    </span>
                  </div>
                  <p className="text-xs theme-text-muted dark:theme-text-muted m-0 mb-2">
                    {formatDate(a.createdAt)}
                  </p>
                  <p className="text-sm text-[var(--color-text)] whitespace-pre-wrap m-0 mb-3">{a.content}</p>
                  <form action={dismissApplication}>
                    <input type="hidden" name="id" value={String(a.id)} />
                    <button type="submit" className="btn btn-danger">
                      {t("dismiss")}
                    </button>
                  </form>
                </article>
              );
            })}
          </div>
        )}
      </section>
    </main>
  );
}