California filing procedure for foreign spouse

[NeoNap]

I am California and US resident. My Spouse is a foreign national and residing in foreign country. 

I have all my income in US and California. 

My spouse has no income in US neither in foreign. 

I already prepared return to do mail filing (as I need to attach w7 for ITIN) and electing treating my foreign spouse as full year resident on US return. 

Questions:

1. But while preparing California return, it is preparing 540NR. Shouldn't be resident return, as I was full year resident? 
2. As I am married and filing MFJ for federal.  How can I file California return? MFJ or MFS? 
3. If I need to file MFS for california, how can I choose that status? And if MFS, do I still need to file paper return or I can efile?