-- Feature 2.2 — Line Movement + Cascade Detection
-- New tables: line_baselines, line_movements, cascade_alerts

-- ============================================================
-- TABLE: line_baselines
-- Morning baseline lines for movement detection
-- ============================================================
CREATE TABLE public.line_baselines (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  sport TEXT NOT NULL,
  game_date DATE NOT NULL,
  player TEXT NOT NULL,
  stat_type TEXT NOT NULL,
  book TEXT NOT NULL,
  baseline_line NUMERIC(5,1) NOT NULL,
  captured_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE UNIQUE INDEX idx_baseline_unique ON public.line_baselines(game_date, player, stat_type, book);
CREATE INDEX idx_baseline_date ON public.line_baselines(game_date);

-- No RLS needed — server-only table, not user-facing

-- ============================================================
-- TABLE: line_movements
-- Detected line movements throughout the day
-- ============================================================
CREATE TABLE public.line_movements (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  sport TEXT NOT NULL,
  game_date DATE NOT NULL,
  player TEXT NOT NULL,
  stat_type TEXT NOT NULL,
  book TEXT NOT NULL,
  baseline_line NUMERIC(5,1) NOT NULL,
  current_line NUMERIC(5,1) NOT NULL,
  movement NUMERIC(4,1) NOT NULL,
  direction TEXT NOT NULL CHECK (direction IN ('up', 'down')),
  sharp_indicator TEXT CHECK (sharp_indicator IN ('sharp_action', 'public_action', 'unknown')),
  detected_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_movements_date ON public.line_movements(game_date);
CREATE INDEX idx_movements_player ON public.line_movements(player);

-- No RLS needed — server-only table

-- ============================================================
-- TABLE: cascade_alerts
-- Alerts for users whose scans are affected
-- ============================================================
CREATE TABLE public.cascade_alerts (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL REFERENCES public.users(id) ON DELETE CASCADE,
  alert_type TEXT NOT NULL CHECK (alert_type IN ('player_scratched', 'line_moved', 'parlay_regraded')),
  scan_session_id UUID REFERENCES public.scan_sessions(id),
  player TEXT,
  detail TEXT NOT NULL,
  is_read BOOLEAN NOT NULL DEFAULT false,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_alerts_user ON public.cascade_alerts(user_id, is_read);

ALTER TABLE public.cascade_alerts ENABLE ROW LEVEL SECURITY;

CREATE POLICY "alerts_select_own" ON public.cascade_alerts
  FOR SELECT USING (auth.uid() = user_id);

CREATE POLICY "alerts_update_own" ON public.cascade_alerts
  FOR UPDATE USING (auth.uid() = user_id)
  WITH CHECK (auth.uid() = user_id);

-- Cleanup: delete baselines older than 2 days (call periodically)
CREATE OR REPLACE FUNCTION public.cleanup_old_baselines()
RETURNS void AS $$
BEGIN
  DELETE FROM public.line_baselines WHERE game_date < (CURRENT_DATE - INTERVAL '2 days');
  DELETE FROM public.line_movements WHERE game_date < (CURRENT_DATE - INTERVAL '2 days');
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;