Crafting system

[PatapoIIIka]

Hi all!
In general, I was engaged in the alteration of crafting for our build
Made a chance craft for an example
/datum/crafting_recipe/something
result = list(/obj/item/crafting/weapon_parts/energy = 80,/obj/item/crafting/weapon_parts/plasma = 60)

Now I need a mechanism that allows me to make a dynamic chance of crafting and control the number of items as a result of crafting.
do you have any ideas

[PKPenguin321]

To clarify, you want to make a crafting recipe that returns a weighted-randomized item?