-- Vorlagen: Demo-Webseiten, die wir Kunden zeigen. Layout und Design stecken im Code
-- (modules/templates), hier liegen nur die angepassten Inhalte einer Variante.
create table public.template_variants (
  id               uuid primary key default gen_random_uuid(),
  template_key     text not null,
  name             text not null,
  client_id        uuid references public.profiles(id) on delete set null,
  content          jsonb not null default '{}'::jsonb,
  -- Öffentlicher Link /demo/<token>; null = nicht geteilt
  share_token      text unique,
  share_expires_at timestamptz,
  created_by       uuid references public.profiles(id) on delete set null default auth.uid(),
  created_at       timestamptz not null default now(),
  updated_at       timestamptz not null default now()
);

create index template_variants_updated_idx on public.template_variants (updated_at desc);
create index template_variants_client_idx on public.template_variants (client_id);

create trigger set_updated_at before update on public.template_variants
  for each row execute function public.set_updated_at();

alter table public.template_variants enable row level security;

create policy admin_all on public.template_variants for all to authenticated
  using ((select public.is_admin())) with check ((select public.is_admin()));

-- Kunden ohne Login sehen genau eine Variante über ihren Token, die Tabelle bleibt für anon zu.
create or replace function public.get_shared_template_variant(p_token text)
returns table (template_key text, name text, content jsonb)
language sql stable security definer set search_path = '' as $$
  select v.template_key, v.name, v.content
    from public.template_variants v
   where v.share_token = p_token
     and (v.share_expires_at is null or v.share_expires_at > now());
$$;

revoke all on function public.get_shared_template_variant(text) from public;
grant execute on function public.get_shared_template_variant(text) to anon, authenticated;