Should I use past perfect tense here?

I was thinking about a certain situation.

Suppose that one week ago, I played basketball once, and that today I was talking with a friend.

I: I played basketball once last week.

My friend: Did you have fun?

I: Not bad, but I didn't play well because I haven't played in a long time.

I am really not sure whether I should use "haven't" or "hadn't" here.
Please let me hear your opinions.