Here is the whole sentence:

결국 집에 들어올 때까지 비가오지않았습니다. 비가 올 때까지 안들어올 껄 그랬나.

I know it is talking about rain, but what's the meaning?

1. 결국 집에 들어올 때까지 비가오지않았습니다.

That's to say, it started to rain when I arrived home or it didn't rain even when I arrived home?

2. 비가 올 때까지 안들어올 껄 그랬나.

I've no idea about this.

anyone can help? Thank you in advance!