Do not charge it! Follow these guides to clean all the parts to help prevent water from corroding it. Do it ASAP!
Read this: [[Electronics Water Damage]]
Disassembly: [guide|75225]
Proper cleaning demonstration: [guide|5825]
As for the camera, there is no hope. You'll need to replace it. Use the teardown to replace it and any other non-functioning part. I recommend taking it low and easy the first few flights to make sure everything's working.
Hope this helps!