"use server";

import { cookies } from "next/headers";
import {
  ACTIVE_SITE_COOKIE_MAX_AGE,
  isStorableActiveSite,
} from "./activeSite";
import { activeSiteCookieForRequest } from "./activeSiteServer";

// THE ONE WRITER of the active-site cookie (see ./activeSite.ts). Called by the
// picker's onChange, by SiteScopeProvider when a site's own page is visited, and
// once by its localStorage migration. Setting a cookie in a server action makes
// Next re-render the current page and its layouts with the new value, so the
// root layout hands the provider the new selection and Dashboard or Channels
// re-scope, with no refresh of our own.
//
// The value is only SHAPE-checked (a site id or "__all__"): whether it names a
// configured site is decided at every read, so a site deleted later resolves as
// no selection. Returns false, writing nothing, for anything else.
export async function setActiveSiteAction(value: string): Promise<boolean> {
  if (!isStorableActiveSite(value)) return false;
  const name = await activeSiteCookieForRequest();
  (await cookies()).set(name, value, {
    path: "/",
    sameSite: "lax",
    maxAge: ACTIVE_SITE_COOKIE_MAX_AGE,
    // Only the server reads it: the page gets it through the layout.
    httpOnly: true,
  });
  return true;
}