-- ============================================================================
-- 빅뱅 Phase 5 실증 중 발견: team_members RLS 정책이 자기 테이블을 재조회해서
-- "infinite recursion detected in policy for relation team_members" 에러.
--
-- meetings / meeting_memos / meeting_documents / team_invites 정책이
-- team_members 서브쿼리를 경유하면서 재귀가 트리거되어 pull 전부 실패 +
-- Realtime 구독 TIMED_OUT 발생.
--
-- 해결: SECURITY DEFINER 함수로 team_id 조회를 감싸 RLS 우회 + 재귀 끊기.
-- 이건 Supabase 공식 권장 패턴.
-- ============================================================================

-- ── 헬퍼 함수 ────────────────────────────────────────────────────────────

CREATE OR REPLACE FUNCTION public.user_team_ids(uid uuid)
  RETURNS SETOF uuid
  LANGUAGE sql
  STABLE
  SECURITY DEFINER
  SET search_path = public, pg_temp
AS $$
  SELECT team_id FROM public.team_members WHERE user_id = uid;
$$;

CREATE OR REPLACE FUNCTION public.user_admin_team_ids(uid uuid)
  RETURNS SETOF uuid
  LANGUAGE sql
  STABLE
  SECURITY DEFINER
  SET search_path = public, pg_temp
AS $$
  SELECT team_id FROM public.team_members
  WHERE user_id = uid AND role IN ('owner', 'admin');
$$;

REVOKE ALL ON FUNCTION public.user_team_ids(uuid) FROM PUBLIC;
REVOKE ALL ON FUNCTION public.user_admin_team_ids(uuid) FROM PUBLIC;
GRANT EXECUTE ON FUNCTION public.user_team_ids(uuid) TO authenticated, service_role;
GRANT EXECUTE ON FUNCTION public.user_admin_team_ids(uuid) TO authenticated, service_role;

-- ── team_members: 재귀 제거 ───────────────────────────────────────────────

DROP POLICY IF EXISTS "team_members_read_same_team" ON public.team_members;
CREATE POLICY "team_members_read_same_team" ON public.team_members
  FOR SELECT USING (
    user_id = auth.uid()
    OR team_id IN (SELECT public.user_team_ids(auth.uid()))
  );

DROP POLICY IF EXISTS "team_members_insert_admin" ON public.team_members;
CREATE POLICY "team_members_insert_admin" ON public.team_members
  FOR INSERT WITH CHECK (
    team_id IN (SELECT public.user_admin_team_ids(auth.uid()))
  );

DROP POLICY IF EXISTS "team_members_update_admin" ON public.team_members;
CREATE POLICY "team_members_update_admin" ON public.team_members
  FOR UPDATE USING (
    team_id IN (SELECT public.user_admin_team_ids(auth.uid()))
  );

DROP POLICY IF EXISTS "team_members_delete_admin_or_self" ON public.team_members;
CREATE POLICY "team_members_delete_admin_or_self" ON public.team_members
  FOR DELETE USING (
    user_id = auth.uid()
    OR team_id IN (SELECT public.user_admin_team_ids(auth.uid()))
  );

-- ── meetings: team_members 직접 참조 → 함수 호출로 교체 ───────────────────

DROP POLICY IF EXISTS "meetings_read" ON public.meetings;
CREATE POLICY "meetings_read" ON public.meetings
  FOR SELECT USING (
    user_id = auth.uid()
    OR (team_id IS NOT NULL AND team_id IN (SELECT public.user_team_ids(auth.uid())))
  );

DROP POLICY IF EXISTS "meetings_update" ON public.meetings;
CREATE POLICY "meetings_update" ON public.meetings
  FOR UPDATE USING (
    user_id = auth.uid()
    OR (team_id IS NOT NULL AND team_id IN (SELECT public.user_admin_team_ids(auth.uid())))
  );

-- ── meeting_memos: meetings RLS 경유 + insert 시 team 체크 ───────────────

DROP POLICY IF EXISTS "meeting_memos_insert" ON public.meeting_memos;
CREATE POLICY "meeting_memos_insert" ON public.meeting_memos
  FOR INSERT WITH CHECK (
    user_id = auth.uid()
    AND meeting_id IN (
      SELECT id FROM public.meetings
      WHERE user_id = auth.uid()
        OR (team_id IS NOT NULL AND team_id IN (SELECT public.user_team_ids(auth.uid())))
    )
  );

-- ── meeting_documents: 동일 패턴 ──────────────────────────────────────────

DROP POLICY IF EXISTS "meeting_documents_insert" ON public.meeting_documents;
CREATE POLICY "meeting_documents_insert" ON public.meeting_documents
  FOR INSERT WITH CHECK (
    user_id = auth.uid()
    AND meeting_id IN (
      SELECT id FROM public.meetings
      WHERE user_id = auth.uid()
        OR (team_id IS NOT NULL AND team_id IN (SELECT public.user_team_ids(auth.uid())))
    )
  );

DROP POLICY IF EXISTS "meeting_documents_update" ON public.meeting_documents;
CREATE POLICY "meeting_documents_update" ON public.meeting_documents
  FOR UPDATE USING (
    user_id = auth.uid()
    OR meeting_id IN (
      SELECT id FROM public.meetings
      WHERE team_id IN (SELECT public.user_admin_team_ids(auth.uid()))
    )
  );

-- ── team_invites: 같은 패턴 오염 ──────────────────────────────────────────

DROP POLICY IF EXISTS "team_invites_read" ON public.team_invites;
CREATE POLICY "team_invites_read" ON public.team_invites
  FOR SELECT USING (
    team_id IN (SELECT public.user_team_ids(auth.uid()))
    OR lower(email) = lower((SELECT email FROM auth.users WHERE id = auth.uid()))
  );