Need help with night binging

Title says it all. I've been trying to break this habit for last 4-5 years now. But more often then not, I will wake up in the middle of the night and go to town on the fridge. On my worst nights, eating up to 1000 calories at a time. I've had considerable weight gain that I attribute to this habit directly.

My strategy has been to lock up the fridge/pantry at night and hiding the key, but this is not a sustainable habit.

Just want to see if anyone else has dealt with this and what their solutions were.

Thanks!