-- create_shop_follows.sql
-- Run this in Supabase SQL Editor

CREATE TABLE IF NOT EXISTS public.ml_shop_follows (
    id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
    user_id UUID NOT NULL REFERENCES auth.users(id) ON DELETE CASCADE,
    shop_id UUID NOT NULL REFERENCES public.ml_shops(id) ON DELETE CASCADE, -- Assuming ml_shops.id is UUID
    created_at TIMESTAMP WITH TIME ZONE DEFAULT timezone('utc'::text, now()) NOT NULL,
    UNIQUE(user_id, shop_id)
);

-- Enable RLS
ALTER TABLE public.ml_shop_follows ENABLE ROW LEVEL SECURITY;

-- Policies
CREATE POLICY "Users can view their own follows" 
ON public.ml_shop_follows FOR SELECT 
USING (auth.uid() = user_id);

CREATE POLICY "Users can create their own follows" 
ON public.ml_shop_follows FOR INSERT 
WITH CHECK (auth.uid() = user_id);

CREATE POLICY "Users can delete their own follows" 
ON public.ml_shop_follows FOR DELETE 
USING (auth.uid() = user_id);

-- Optional: View count on shops
-- You might want to add follower_count to ml_shops and use triggers to update it.