-- Announcements table
CREATE TABLE public.announcements (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  title TEXT NOT NULL,
  content TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'active',
  visibility TEXT NOT NULL DEFAULT 'all',
  created_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

ALTER TABLE public.announcements ENABLE ROW LEVEL SECURITY;

CREATE POLICY "Authenticated users can read active announcements"
  ON public.announcements FOR SELECT TO authenticated
  USING (status = 'active');

CREATE POLICY "Authenticated users can insert announcements"
  ON public.announcements FOR INSERT TO authenticated
  WITH CHECK (true);

CREATE POLICY "Authors can update their announcements"
  ON public.announcements FOR UPDATE TO authenticated
  USING (created_by = auth.uid());

CREATE POLICY "Authors can delete their announcements"
  ON public.announcements FOR DELETE TO authenticated
  USING (created_by = auth.uid());

-- Reminders table
CREATE TABLE public.reminders (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  title TEXT NOT NULL,
  description TEXT,
  due_date DATE NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending',
  created_by UUID REFERENCES auth.users(id) ON DELETE CASCADE NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

ALTER TABLE public.reminders ENABLE ROW LEVEL SECURITY;

CREATE POLICY "Users can read own reminders"
  ON public.reminders FOR SELECT TO authenticated
  USING (created_by = auth.uid());

CREATE POLICY "Users can create reminders"
  ON public.reminders FOR INSERT TO authenticated
  WITH CHECK (created_by = auth.uid());

CREATE POLICY "Users can update own reminders"
  ON public.reminders FOR UPDATE TO authenticated
  USING (created_by = auth.uid());

CREATE POLICY "Users can delete own reminders"
  ON public.reminders FOR DELETE TO authenticated
  USING (created_by = auth.uid());