"use server";

import { revalidatePath } from "next/cache";
import { getServerSession } from "next-auth";
import { authOptions } from "@/lib/auth-options";
import type { LandingContentV1 } from "@/lib/landing";
import { saveLandingContent } from "@/lib/landing";

async function assertAdmin() {
  const session = await getServerSession(authOptions);
  if (!session?.user?.id || session.user.role !== "ADMIN") {
    throw new Error("Keine Berechtigung.");
  }
}

export async function updateLandingAction(formData: FormData) {
  await assertAdmin();

  const heroTitle = String(formData.get("heroTitle") ?? "").trim();
  const heroLead = String(formData.get("heroLead") ?? "").trim();
  const primaryLabel = String(formData.get("primaryLabel") ?? "").trim();
  const primaryHref = String(formData.get("primaryHref") ?? "").trim();
  const secondaryLabel = String(formData.get("secondaryLabel") ?? "").trim();
  const secondaryHref = String(formData.get("secondaryHref") ?? "").trim();
  const benefitSectionTitle = String(formData.get("benefitSectionTitle") ?? "").trim();

  const benefits: { title: string; body: string }[] = [];
  for (let i = 1; i <= 6; i++) {
    const title = String(formData.get(`benefit${i}Title`) ?? "").trim();
    const body = String(formData.get(`benefit${i}Body`) ?? "").trim();
    if (title || body) benefits.push({ title, body });
  }

  const content: LandingContentV1 = {
    version: 1,
    heroTitle,
    heroLead,
    primaryCta: {
      label: primaryLabel || "Zu den Kursen",
      href: primaryHref || "/kurse",
    },
    secondaryCta:
      secondaryLabel && secondaryHref ? { label: secondaryLabel, href: secondaryHref } : undefined,
    benefitSectionTitle: benefitSectionTitle || "Deine Vorteile",
    benefits,
  };

  await saveLandingContent(content);
  revalidatePath("/");
  revalidatePath("/admin/landing");
}