"use server";

import { revalidatePath } from "next/cache";
import { redirect } from "next/navigation";
import { requirePermission } from "@/lib/admin/guard";
import { PERMS } from "@/lib/permissions";
import { slugify } from "@/lib/format";
import { prisma } from "@/lib/prisma";

async function uniqueSlug(title: string): Promise<string> {
	const base = slugify(title);
	let slug = base;
	let n = 2;
	while (
		await prisma.websiteArticles.findUnique({
			where: { slug },
			select: { id: true },
		})
	) {
		slug = `${base}-${n++}`;
	}
	return slug;
}

export async function createArticle(formData: FormData): Promise<void> {
	const staff = await requirePermission(PERMS.NEWS_EDIT);
	const title = String(formData.get("title") ?? "")
		.normalize("NFC")
		.trim();
	const shortStory = String(formData.get("shortStory") ?? "")
		.normalize("NFC")
		.trim();
	const fullStory = String(formData.get("fullStory") ?? "")
		.normalize("NFC")
		.trim();
	const image = String(formData.get("image") ?? "")
		.normalize("NFC")
		.trim();
	if (!title) return;

	try {
		const now = new Date();
		await prisma.websiteArticles.create({
			data: {
				slug: await uniqueSlug(title),
				title: title.slice(0, 255),
				shortStory: shortStory.slice(0, 255),
				fullStory,
				image: image.slice(0, 255),
				userId: staff.id,
				createdAt: now,
				updatedAt: now,
			},
		});
	} catch {
		// Database error — re-render unchanged with error.
		redirect(
			"/admin/articles/new?error=Database error while creating article. Please try again.",
		);
	}
	redirect("/admin/articles");
}

export async function updateArticle(formData: FormData): Promise<void> {
	await requirePermission(PERMS.NEWS_EDIT);
	const id = BigInt(String(formData.get("id")));
	try {
		await prisma.websiteArticles.update({
			where: { id },
			data: {
				title: String(formData.get("title") ?? "")
					.normalize("NFC")
					.trim()
					.slice(0, 255),
				shortStory: String(formData.get("shortStory") ?? "")
					.normalize("NFC")
					.trim()
					.slice(0, 255),
				fullStory: String(formData.get("fullStory") ?? "")
					.normalize("NFC")
					.trim(),
				image: String(formData.get("image") ?? "")
					.normalize("NFC")
					.trim()
					.slice(0, 255),
				updatedAt: new Date(),
			},
		});
	} catch {
		redirect("/admin/articles?error=Update failed");
	}
	revalidatePath(`/admin/articles/${id}`);
	redirect("/admin/articles");
}

export async function deleteArticle(formData: FormData): Promise<void> {
	await requirePermission(PERMS.NEWS_EDIT);
	const id = BigInt(String(formData.get("id")));
	try {
		await prisma.$transaction([
			prisma.websiteArticleReactions.deleteMany({ where: { articleId: id } }),
			prisma.websiteArticleComments.deleteMany({ where: { articleId: id } }),
			prisma.websiteArticles.delete({ where: { id } }),
		]);
	} catch {
		redirect("/admin/articles?error=Delete failed");
	}
	redirect("/admin/articles");
}