Not good. Somethings bent, either chassis or suspension. One things certain - it didn't come from the Nissan factory like that.....
I worked at a panel beaters many years ago and saw similar things done with radius rods to 'compensate' for front end damage.
My brother's been a panel beater/mechanic for 30 years so I'll ask his opinion.
First thing you need to do is put the car on a hoist and very closely inspect all the rear suspension parts and rear subframe mounts - as well as all the chassis joints and panels at the rear of the car - for signs of damage. Also take out all the boot trim, spare wheel, etc so that you can inspect the shock towers and all the internal panels.
The only certain way to check the chassis is to use a chassis alignment jig, but that requires stripping a lot of the car, and would be a last resort.