"use server";

import { revalidatePath } from "next/cache";
import { moduleGuard } from "@/server/action-guard";
import { ctxFromGuard } from "@/server/services/context";
import { setPreferences } from "@/server/services/notifications/preferences";

const guard = moduleGuard("notifications");

export type PreferencesState = { status: "idle" | "saved" | "error" };

/** Save the current user's e-mail opt-outs (checked boxes = e-mail on). */
export async function saveNotificationPreferences(_prev: PreferencesState, formData: FormData): Promise<PreferencesState> {
  const g = await guard("notification:read");
  try {
    await setPreferences(ctxFromGuard(g), { emailOn: formData.getAll("emailOn").map(String) });
  } catch (err) {
    console.error("[notifications] saving preferences failed:", (err as Error).message);
    return { status: "error" };
  }
  revalidatePath("/account");
  return { status: "saved" };
}