import type { SupabaseClient } from "@supabase/supabase-js";
import type { Database } from "supabase/database.types";
import { supabaseServerClient } from "supabase/serverClient";

// The publication served on a custom domain, if any. Cross-domain login lands
// on the main-site confirm page after leaving the publication's domain;
// resolving the originating host back to its publication lets that page adopt
// the publication's theme. Mirrors the custom_domains -> publication_domains ->
// publications lookup the middleware uses to route custom domains.
export async function publicationUriForHost(
  host: string,
  supabase: SupabaseClient<Database> = supabaseServerClient,
): Promise<string | null> {
  let { data } = await supabase
    .from("custom_domains")
    .select("publication_domains(publications(uri))")
    .eq("domain", host)
    .maybeSingle();
  return data?.publication_domains?.[0]?.publications?.uri ?? null;
}