How screwed am i?

Hey guys, I have a 2016 wildcat x1000 limited, just was out to put new primary and secondary clutches in it. Went to torque down the primary bolt, and the shaft it bolts into is spinning ,I'm guessing my crankshaft gear is broken... sucks cause I literally started it up with old clutch, drove it into garage to replace with new. And now it's fucked....could it have been the pressure of the primary clutch puller ? I did whole top end last year. Ran fine ever since. Do you have any suggestions on what happened? P.s. now engine won't start. Makes weird noise when starter turns over....I'm guessing I'm fucked and have to pull engine and rebuild bottom end...any videos or write ups that provide step by step process? Thanks