"use server";

import { revalidatePath } from "next/cache";
import { redirect } from "next/navigation";
import { slugify } from "@/lib/format";
import { requireStaff } from "@/lib/admin/guard";
import { prisma } from "@/lib/prisma";
import { formPositiveBigInt } from "@/lib/form-data";

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 requireStaff();
  const title = String(formData.get("title") ?? "").trim();
  const shortStory = String(formData.get("shortStory") ?? "").trim();
  const fullStory = String(formData.get("fullStory") ?? "").trim();
  const image = String(formData.get("image") ?? "").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 requireStaff();
  const id = BigInt(String(formData.get("id")));
  try {
    await prisma.websiteArticles.update({
      where: { id },
      data: {
        title: String(formData.get("title") ?? "").trim().slice(0, 255),
        shortStory: String(formData.get("shortStory") ?? "").trim().slice(0, 255),
        fullStory: String(formData.get("fullStory") ?? "").trim(),
        image: String(formData.get("image") ?? "").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 requireStaff();
  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");
}