import "server-only";

import { prisma } from "@/lib/db";
import { SignupMode } from "@/lib/generated/prisma/enums";

// Fixed id of the one-and-only SiteSettings row (see prisma/schema.prisma).
const SETTINGS_ID = "singleton";

/**
 * Reads the site's sign-up mode. No row means the settings were never
 * touched, which is the same as OPEN -- today's default behavior -- so
 * this never creates a row just to read it.
 */
export async function getSignupMode(): Promise<SignupMode> {
  const settings = await prisma.siteSettings.findUnique({
    where: { id: SETTINGS_ID },
    select: { signupMode: true },
  });
  return settings?.signupMode ?? SignupMode.OPEN;
}

/** Creates the settings row on first write, updates it on every write after. */
export async function setSignupMode(mode: SignupMode): Promise<void> {
  await prisma.siteSettings.upsert({
    where: { id: SETTINGS_ID },
    update: { signupMode: mode },
    create: { id: SETTINGS_ID, signupMode: mode },
  });
}