-- =============================================================================
-- Migration: 20260420000006_conv_messages_notifications
-- Sessao 11 - Fase 5a (extensao).
--
-- Integra conversation_messages ao sistema de notifications existente:
--   - Adiciona 'inbound_message' ao CHECK do notifications.type
--   - Trigger em conversation_messages: quando chega inbound, fan-out para
--     members do tenant apropriados (responsible_member do paciente, ou
--     todos tenant_admin/clinic_admin/therapist ativos se sem vinculo)
-- =============================================================================

-- Ajusta CHECK do type
ALTER TABLE public.notifications
    DROP CONSTRAINT IF EXISTS notifications_type_check;

ALTER TABLE public.notifications
    ADD CONSTRAINT notifications_type_check
    CHECK (type = ANY (ARRAY[
        'new_scheduling',
        'new_patient',
        'recurrence_alert',
        'session_status',
        'inbound_message'
    ]));

-- ---------------------------------------------------------------------------
-- Trigger function: fan-out mensagem inbound para notifications dos members
-- ---------------------------------------------------------------------------
CREATE OR REPLACE FUNCTION public.fanout_inbound_message_to_notifications()
RETURNS TRIGGER
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path = public, pg_temp
AS $$
DECLARE
    v_target_user UUID;
    v_title TEXT;
    v_detail TEXT;
    v_initials TEXT;
    v_deeplink TEXT;
    v_patient_name TEXT;
    v_payload JSONB;
BEGIN
    -- so processa inbound
    IF NEW.direction <> 'inbound' THEN
        RETURN NEW;
    END IF;

    -- busca nome do paciente (se vinculado)
    IF NEW.patient_id IS NOT NULL THEN
        SELECT nome_completo INTO v_patient_name FROM public.patients WHERE id = NEW.patient_id;
    END IF;

    -- titulo e detalhes
    v_title := COALESCE(v_patient_name, NEW.from_number, 'Desconhecido');
    v_detail := COALESCE(left(NEW.body, 100), '[mensagem sem texto]');

    -- iniciais
    IF v_patient_name IS NOT NULL THEN
        v_initials := upper(left(v_patient_name, 1)) ||
                      COALESCE(upper(left(split_part(v_patient_name, ' ', 2), 1)), '');
    ELSE
        v_initials := '?';
    END IF;

    -- deeplink para a pagina de conversas (clinic padrao; therapist tambem funciona via mesma rota na area dele)
    v_deeplink := '/admin/conversas';

    v_payload := jsonb_build_object(
        'title', v_title,
        'detail', v_detail,
        'avatar_initials', v_initials,
        'deeplink', v_deeplink,
        'channel', NEW.channel,
        'conversation_message_id', NEW.id,
        'patient_id', NEW.patient_id,
        'from_number', NEW.from_number
    );

    -- ─── decide destinatarios ─────────────────────────────────────────────

    -- Caso 1: paciente vinculado e tem responsible_member_id
    IF NEW.patient_id IS NOT NULL THEN
        SELECT tm.user_id INTO v_target_user
        FROM public.patients p
        JOIN public.tenant_members tm ON tm.id = p.responsible_member_id
        WHERE p.id = NEW.patient_id
          AND tm.status = 'active'
        LIMIT 1;

        IF v_target_user IS NOT NULL THEN
            INSERT INTO public.notifications (owner_id, tenant_id, type, ref_id, ref_table, payload)
            VALUES (v_target_user, NEW.tenant_id, 'inbound_message', NULL, 'conversation_messages', v_payload);
            RETURN NEW;
        END IF;
    END IF;

    -- Caso 2: fallback — fan-out pra todos tenant_admin/clinic_admin/therapist ativos
    INSERT INTO public.notifications (owner_id, tenant_id, type, ref_id, ref_table, payload)
    SELECT tm.user_id, NEW.tenant_id, 'inbound_message', NULL, 'conversation_messages', v_payload
    FROM public.tenant_members tm
    WHERE tm.tenant_id = NEW.tenant_id
      AND tm.status = 'active'
      AND tm.role IN ('clinic_admin', 'tenant_admin', 'therapist');

    RETURN NEW;
END;
$$;

-- Trigger
DROP TRIGGER IF EXISTS trg_fanout_inbound_to_notifications ON public.conversation_messages;
CREATE TRIGGER trg_fanout_inbound_to_notifications
    AFTER INSERT ON public.conversation_messages
    FOR EACH ROW EXECUTE FUNCTION public.fanout_inbound_message_to_notifications();

COMMENT ON FUNCTION public.fanout_inbound_message_to_notifications() IS
    'Cria registros em notifications pra members apropriados quando chega mensagem inbound. Respeita responsible_member do paciente.';