"use server";

import { revalidatePath } from "next/cache";
import { prisma } from "@/lib/prisma";
import { logAdminAction } from "@/lib/audit-log";
import { MAX_SEPA_HOLD_DAYS, SEPA_HOLD_DAYS_KEY, getSepaHoldDays } from "@/lib/sponsorship/settings";
import { requireAdmin, fail, succeed, str } from "./_shared";
import { intOrNull } from "./sponsorship-shared";

const SUBSCRIPTIONS_PATH = "/admin/patenschaften/abos";

/**
 * Hebt die SEPA-Sperre eines Kontos auf (gesetzt nach einer Rueckbuchung).
 * Danach kann das Konto neue Abos wieder per Lastschrift abschliessen.
 */
export async function liftSepaBlockAction(formData: FormData): Promise<void> {
  const admin = await requireAdmin();
  const customerId = str(formData, "customerId");
  const customer = await prisma.customer.findUnique({ where: { id: customerId }, select: { email: true, sepaBlockedAt: true } });
  if (!customer) return fail(SUBSCRIPTIONS_PATH, "Das Konto wurde nicht gefunden.");
  if (!customer.sepaBlockedAt) return succeed(SUBSCRIPTIONS_PATH, "Für dieses Konto besteht keine SEPA-Sperre.");

  await prisma.customer.update({ where: { id: customerId }, data: { sepaBlockedAt: null } });
  await logAdminAction(admin, {
    action: "customer.sepa_unblock",
    entityType: "Customer",
    entityId: customerId,
    detail: `${customer.email} (gesperrt seit ${customer.sepaBlockedAt.toISOString().slice(0, 10)})`,
  });
  revalidatePath(SUBSCRIPTIONS_PATH);
  return succeed(SUBSCRIPTIONS_PATH, `SEPA-Sperre für ${customer.email} aufgehoben.`);
}

export async function updateSepaHoldDaysAction(formData: FormData): Promise<void> {
  const admin = await requireAdmin();
  const days = intOrNull(str(formData, "sepaHoldDays"));
  if (days === null || days > MAX_SEPA_HOLD_DAYS) {
    return fail(SUBSCRIPTIONS_PATH, `Bitte eine ganze Zahl von 0 bis ${MAX_SEPA_HOLD_DAYS} Tagen angeben.`);
  }
  const previous = await getSepaHoldDays();
  await prisma.siteContent.upsert({
    where: { key: SEPA_HOLD_DAYS_KEY },
    create: { key: SEPA_HOLD_DAYS_KEY, valueDe: String(days) },
    update: { valueDe: String(days) },
  });
  await logAdminAction(admin, {
    action: "sponsorship.sepa_hold_days",
    entityType: "SiteContent",
    entityId: SEPA_HOLD_DAYS_KEY,
    detail: `${previous} → ${days} Tage`,
  });
  revalidatePath(SUBSCRIPTIONS_PATH);
  return succeed(SUBSCRIPTIONS_PATH, days === 0 ? "SEPA-Neukunden-Frist abgeschaltet." : `SEPA-Neukunden-Frist auf ${days} Tage gesetzt.`);
}