Provide discounts through WooCommerce based on product purchase history?

I'm trying to keep track of purchases that users have made and based on that, group them into discount categories.

So a running total of purchases over 12 months - depending on how much they spend they are put into brackets with a specific % off.

How would I go about trying to implement this? I'm using the dynamic prices plugin but I'm not sure that would be a solution to what I want.