-- Fix missing product data in order items
-- Updates order items to use actual product names and images from the product table
-- instead of placeholders or NULLs.

DO $$
BEGIN
    -- 1. Update image_url from SKU if available
    UPDATE public.ml_order_items oi
    SET image_url = sku.image_url
    FROM public.ml_product_skus sku
    WHERE oi.sku_id = sku.id 
    AND (oi.image_url IS NULL OR oi.image_url = '');

    -- 2. Update image_url from Product Main Image if still NULL
    UPDATE public.ml_order_items oi
    SET image_url = p.main_image_url
    FROM public.ml_products p
    WHERE oi.product_id = p.id 
    AND (oi.image_url IS NULL OR oi.image_url = '');

    -- 3. Update product_name from Product if it looks like a placeholder
    -- (checking for "Product" or similar might be too aggressive, but let's update all to ensure consistency with current product DB)
    -- Actually, let's only update if it looks like the mock data we inserted "Pending Order Product", etc.
    UPDATE public.ml_order_items oi
    SET product_name = p.name
    FROM public.ml_products p
    WHERE oi.product_id = p.id 
    AND (
        oi.product_name LIKE '%Product%' 
        OR oi.product_name LIKE 'Pending Order%'
        OR oi.product_name = 'Test Product'
    );

    -- 4. Ensure we have items for all orders (Cleanup empty orders if any, or insert default item)
    -- For now, let's just log if there are orders without items
    -- SELECT count(*) FROM ml_orders o WHERE NOT EXISTS (SELECT 1 FROM ml_order_items oi WHERE oi.order_id = o.id);
    
    -- Insert a default item for orders that have NO items (if any exist)
    -- We need a valid product ID for this.
    -- This is a bit complex in a DO block without specific IDs, so we'll skip creating new items for now 
    -- unless specifically requested. The main issue reported was likely "missing associated data" (images/names).

    RAISE NOTICE 'Updated order items with real product data.';
END $$;