Woocommerce digitalkey mangement

Hello, im looking for a pretty simple thing, im currently trying to get a digital key (games-software etc, digital keys) i need a system, so when a customer buys a key, it should be sent directly to the customers email, i need a function where my keys (the keys in stock) are removed after its been sent to a customer. example: a customer buys windows 10 home key, i have a list of keys, its autmated to take a key, send it to the customers email, and after its sent, delete that key from the key list, and when the next customers buys a key, it should take the next key on the list. if a customers buys multible keys it should take the first key, and then add on as many keys as the customers chooses to buy, and when all those keys are sent, all the keys (that the customers bough, lets say he/her buys 10 keys) should be removed from the list.