Did snape almost catches harry wandering around the castle at night

Yes, in the first book he almost did.

Explanation:

When Harry Potter was walking around the Hogwarts halls in the first book and find Snape fighting with the defence against the dark arts teacher. Snape turns around after hearing a noise made by Harry while he is under the cloak of invisibility but Harry moves away and finds the Mirror of Erised. In conclusion, Snape did almost find Harry but he got away.

He did actually. Then he compared him to his father.