doing sleeping

I would like to know the meaning of the next sentence.

What are you doing sleeping in the middle of the day?

I would like to know the difference between '1" and "2'
1. what are you doing in the middle of the day?
2. what are you doing sleeping in the middle of the day?

I can see why you are confused. It's very informal and spoken English.

What are you doing sleeping in the middle of the day?

This means Why are you sleeping? It's the middle of the day. (People don't normally sleep in the middle of the day.)

Other examples:
What are you doing taking the garbage out? You're our guest! (Guests don't usually take the garbage out.)

What are you doing checking your email? You're on vacation!