ifElseChain: rewrite if-else to switch statement (gocritic)

line is 208 characters (lll)

unnecessary leading newline (whitespace)

unnecessary leading newline (whitespace)

unnecessary trailing newline (whitespace)

unnecessary leading newline (whitespace)

unnecessary trailing newline (whitespace)

unnecessary trailing newline (whitespace)

ineffectual assignment to err (ineffassign)

SA1019: wait.Poll is deprecated: This method does not return errors from context, use PollWithContextTimeout. Note that the new method will no longer return ErrWaitTimeout and instead return errors defined by the context package. Will be removed in a future release. (staticcheck)