-- Seguimiento de Impuestos GLM
-- Actualización para consultar, editar o eliminar eventos desde la app.
-- Los eventos quedan bloqueados automáticamente después del primer aviso enviado.
-- Ejecutar una sola vez si ya se ejecutó el script completo anteriormente.

begin;

create or replace function public.tax_obligation_delivery_status()
returns table (
  obligation_id uuid,
  has_sent_notification boolean,
  first_sent_at timestamptz,
  sent_notification_count bigint
)
language sql
stable
security definer
set search_path = ''
as $$
  select
    obligation.id as obligation_id,
    count(log.id) filter (where log.status = 'sent') > 0 as has_sent_notification,
    min(log.sent_at) filter (where log.status = 'sent') as first_sent_at,
    count(log.id) filter (where log.status = 'sent') as sent_notification_count
  from public.tax_obligations obligation
  left join public.tax_notification_log log
    on log.obligation_id = obligation.id
  where obligation.active = true
    and public.has_tax_calendar_access()
  group by obligation.id;
$$;

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

create or replace function public.tax_prevent_sent_obligation_changes()
returns trigger
language plpgsql
security definer
set search_path = ''
as $$
begin
  if exists (
    select 1
    from public.tax_notification_log log
    where log.obligation_id = old.id
      and log.status = 'sent'
  ) and (
    new.due_date is distinct from old.due_date
    or new.description is distinct from old.description
    or new.category is distinct from old.category
    or new.country_id is distinct from old.country_id
    or new.active is distinct from old.active
  ) then
    raise exception using
      errcode = 'P0001',
      message = 'Esta obligación ya generó avisos y no puede modificarse ni eliminarse.';
  end if;

  return new;
end;
$$;

drop trigger if exists tax_obligations_lock_after_sent_trigger
on public.tax_obligations;

create trigger tax_obligations_lock_after_sent_trigger
before update on public.tax_obligations
for each row execute function public.tax_prevent_sent_obligation_changes();

commit;