-- =============================================================================
-- F6.2 Lote A — anexa triggers schema-agnósticos aos schemas tenant
--
-- O clone (LIKE INCLUDING ALL) NÃO copia triggers. As tabelas tenant nos
-- schemas precisam dos triggers de negócio. Lote A: os PROVADAMENTE
-- schema-agnósticos (só mexem em NEW/OLD, não referenciam outras tabelas) —
-- seguros pra anexar sem reescrever a função:
--   família updated_at (8) + prevent_promoting_to_system +
--   prevent_system_group_changes
-- Os schema-aware (financeiro/audit/notif/timeline/sync) vêm no Lote B.
--
-- attach_agnostic_triggers(schema) recria, no schema dado, os triggers de
-- public cuja função está na whitelist agnóstica. A função do trigger continua
-- sendo a de public (agnóstica → funciona em qualquer schema). Backfill dos 9;
-- o wiring no clone_tenant_template acontece no fim da F6.2 (com todos prontos).
-- =============================================================================

BEGIN;

CREATE OR REPLACE FUNCTION public.attach_agnostic_triggers(p_schema text)
RETURNS int
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path TO 'public', 'pg_temp'
AS $$
DECLARE
    agnostic text[] := ARRAY[
        'set_updated_at','fn_clinical_notes_updated_at','set_insurance_plans_updated_at',
        'set_medicos_updated_at','set_services_updated_at','set_updated_at_recurrence',
        'update_payment_settings_updated_at','update_professional_pricing_updated_at',
        'prevent_promoting_to_system','prevent_system_group_changes'
    ];
    r record;
    v_def text;
    v_count int := 0;
BEGIN
    IF p_schema NOT LIKE 'tenant\_%' THEN
        RAISE EXCEPTION 'attach_agnostic_triggers: schema inválido %', p_schema;
    END IF;

    FOR r IN
        SELECT c.relname AS tab, t.tgname, pg_get_triggerdef(t.oid) AS def
        FROM pg_trigger t
        JOIN pg_class c ON c.oid = t.tgrelid
        JOIN pg_namespace n ON n.oid = c.relnamespace
        JOIN pg_proc p ON p.oid = t.tgfoid
        WHERE n.nspname = 'public' AND NOT t.tgisinternal
          AND p.proname = ANY(agnostic)
          AND EXISTS (SELECT 1 FROM information_schema.tables
                      WHERE table_schema = p_schema AND table_name = c.relname)
    LOOP
        -- redireciona o ON public.<tab> pro schema do tenant (a função fica em public)
        v_def := replace(r.def, 'ON public.' || r.tab || ' ', 'ON ' || p_schema || '.' || r.tab || ' ');
        IF v_def = r.def THEN
            RAISE EXCEPTION 'attach_agnostic_triggers: não consegui redirecionar % (%.%)', r.tgname, p_schema, r.tab;
        END IF;
        EXECUTE format('DROP TRIGGER IF EXISTS %I ON %I.%I', r.tgname, p_schema, r.tab);
        EXECUTE v_def;
        v_count := v_count + 1;
    END LOOP;

    RETURN v_count;
END;
$$;

-- Backfill dos 9 schemas existentes
DO $$
DECLARE r record; v int;
BEGIN
    FOR r IN SELECT schema_name FROM public.tenant_schemas ORDER BY schema_name LOOP
        v := public.attach_agnostic_triggers(r.schema_name);
        RAISE NOTICE 'F6.2A %: % triggers agnósticos', r.schema_name, v;
    END LOOP;
END $$;

COMMIT;