-- ============================================================================
-- Phase V2-O: Expo Push Token 저장
-- 모바일 앱 로그인 시 Expo push token을 등록. 서버에서 토큰으로 notification 발송.
-- ============================================================================

CREATE TABLE public.push_tokens (
  id             uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id        uuid NOT NULL REFERENCES auth.users(id) ON DELETE CASCADE,
  token          text NOT NULL UNIQUE,
  platform       text NOT NULL CHECK (platform IN ('ios', 'android', 'web')),
  device_name    text,
  created_at     timestamptz NOT NULL DEFAULT now(),
  updated_at     timestamptz NOT NULL DEFAULT now()
);

CREATE INDEX idx_push_tokens_user_id ON public.push_tokens(user_id);

ALTER TABLE public.push_tokens ENABLE ROW LEVEL SECURITY;

CREATE POLICY "push_tokens_own" ON public.push_tokens
  FOR ALL USING (user_id = auth.uid()) WITH CHECK (user_id = auth.uid());

CREATE TRIGGER set_updated_at_push_tokens
  BEFORE UPDATE ON public.push_tokens
  FOR EACH ROW EXECUTE FUNCTION public.moddatetime();