ふしがある => Seem N2
Speculation
ふとした ... => unexpected / incidental / little bitty N2
Expected
ふと => suddenly; accidentally; unexpectedly; unintentionally ~ N3
ふそくはない => nothing to complain about, just as expected N3
As expected
~こういうふう => like this N1
Means and methods
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
~ふり(~振り)      => to pretend; to act as if N3
もし~としても/もし~としたって => Assuming; Even if ~ N3
てしまった => to finish N4
Description
っぱなし => To keep A; To remain/stay A N2
Adjectival, Descriptions
ふりをする => to pretend; to act as if ~ N3
を[踏「ふ」]まえて => Thinking of A N1
Based/focused/depending on