import { desc, inArray } from "drizzle-orm";
import { Newspaper } from "lucide-react";
import { redirect } from "next/navigation";
import { getTranslations } from "next-intl/server";
import { AdminPageShell } from "@/components/admin/admin-page-shell";
import { ArticleCard } from "@/components/admin/article-card";
import { StatusCard } from "@/components/admin/dashboard";
import Link from "@/components/link";
import { Button } from "@/components/ui/button";
import { db, User, WebsiteArticles } from "@/lib/db";
import { formatDate } from "@/lib/format-date";
import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";

export default async function AdminArticles({
	searchParams,
}: {
	searchParams: Promise<{ error?: string }>;
}) {
	const { session, permissions } = await getAdminContext();
	if (!canAccess(permissions, PERMS.NEWS_VIEW, session.user.rank)) {
		redirect("/admin");
	}

	const { error } = await searchParams;
	const t = await getTranslations("pages.admin.articles");
	const articles = await db
		.select({
			id: WebsiteArticles.id,
			title: WebsiteArticles.title,
			slug: WebsiteArticles.slug,
			image: WebsiteArticles.image,
			createdAt: WebsiteArticles.createdAt,
			userId: WebsiteArticles.userId,
		})
		.from(WebsiteArticles)
		.orderBy(desc(WebsiteArticles.createdAt))
		.limit(50)
		.catch(() => []);

	const authorMap = new Map<number, string>();
	const authorIds = articles
		.map((a) => a.userId)
		.filter((id): id is number => Boolean(id));
	if (authorIds.length > 0) {
		const authors = await db
			.select({ id: User.id, username: User.username })
			.from(User)
			.where(inArray(User.id, authorIds))
			.catch(() => []);
		for (const u of authors) authorMap.set(u.id, u.username);
	}

	const latest = articles[0]?.createdAt
		? formatDate(articles[0].createdAt, "date")
		: "—";

	return (
		<AdminPageShell
			icon={Newspaper}
			title={t("title")}
			subtitle={t("subtitle")}
			actions={
				<Button variant="default" asChild>
					<Link href="/admin/articles/new">{t("newArticle")}</Link>
				</Button>
			}
		>
			{error ? (
				<p className="text-xs text-[var(--admin-error)] mb-4">Error: {error}</p>
			) : null}

			<div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
				<StatusCard
					label={t("articlesShown")}
					value={articles.length}
					icon="📰"
				/>
				<StatusCard
					label={t("latest")}
					value={latest}
					hint={t("mostRecentPost")}
					icon="🕒"
				/>
			</div>

			<section className="mt-2">
				<h2 className="admin-section-title">{t("recentArticles")}</h2>
				{articles.length === 0 ? (
					<div className="admin-empty">{t("noArticles")}</div>
				) : (
					<div className="grid grid-cols-[repeat(auto-fill,minmax(260px,1fr))] gap-4">
						{articles.map((a) => (
							<ArticleCard
								key={String(a.id)}
								id={String(a.id)}
								title={a.title}
								image={a.image}
								createdAt={a.createdAt ? a.createdAt.toISOString() : null}
								author={authorMap.get(a.userId ?? -1)}
							/>
						))}
					</div>
				)}
			</section>
		</AdminPageShell>
	);
}