This has happened to the A320 3 or 4 times before. It starts with a shock absorber which does not extend, and the gear won't retract. It can be accompanied by a nosewheel steering fault which results in the wheels being offset by 90 degrees. The reason for no reverse is that the fault results in a dual Landing Gear Control & Interface Unit failure, which disables the reversers. Not sure why the spoilers didn't deploy.