[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
っこない => A is definitely not possible N2
Potential, Possibility
ことになっている => Plan, rule, decide N2
Information, Report
ところだった => About to… N3
Will, Decision, Doing
といったところだ => Display an amount/level/degree A (程度) N1
Degree/ Level/Amount
その[結果「けっか」] => Because of A (in the past), B N3
Reason, Result, Response
に[限「かぎ」]った[事「こと」]ではない => It's not limited to A, it's not only A N1
Degree/ Level/Amount
ことはない => Not necessary N3
Needs, Requirement
っぽい => Seems A; A-ish N3
Adjectival, Description
めったにない => Rarely N3
Degree. Level, Amount
がっている => Want, like N4
Secondary Verb
てはいけない => May not A, must not A N4
Can, Should, Must