-- Fix: subscriptions_validate_scope — adiciona suporte a target='patient'

CREATE OR REPLACE FUNCTION public.subscriptions_validate_scope()
RETURNS trigger
LANGUAGE plpgsql
AS $$
DECLARE
  v_target text;
BEGIN
  SELECT lower(p.target) INTO v_target
  FROM public.plans p
  WHERE p.id = NEW.plan_id;

  IF v_target IS NULL THEN
    RAISE EXCEPTION 'Plano inválido (target nulo).';
  END IF;

  IF v_target = 'clinic' THEN
    IF NEW.tenant_id IS NULL THEN
      RAISE EXCEPTION 'Assinatura clinic exige tenant_id.';
    END IF;
    IF NEW.user_id IS NOT NULL THEN
      RAISE EXCEPTION 'Assinatura clinic não pode ter user_id (XOR).';
    END IF;

  ELSIF v_target = 'therapist' THEN
    IF NEW.tenant_id IS NOT NULL THEN
      RAISE EXCEPTION 'Assinatura therapist não deve ter tenant_id.';
    END IF;
    IF NEW.user_id IS NULL THEN
      RAISE EXCEPTION 'Assinatura therapist exige user_id.';
    END IF;

  ELSIF v_target = 'patient' THEN
    IF NEW.tenant_id IS NOT NULL THEN
      RAISE EXCEPTION 'Assinatura patient não deve ter tenant_id.';
    END IF;
    IF NEW.user_id IS NULL THEN
      RAISE EXCEPTION 'Assinatura patient exige user_id.';
    END IF;

  ELSE
    RAISE EXCEPTION 'Target de plano inválido: %', v_target;
  END IF;

  RETURN NEW;
END;
$$;

ALTER FUNCTION public.subscriptions_validate_scope() OWNER TO supabase_admin;