How to merge these codes, awk then cut - awk

Question

I am using awk in Debian.
input
11.22.33.44#55878:
11.22.33.43#55879:
...
...
(smtp:55.66.77.88)
(smtp:55.66.77.89)
...
...
cpe-33-22-11-99.buffalo.res.rr.com[99.11.22.33]
cpe-34-22-11-99.buffalo.res.rr.com[99.11.22.34]
...
Parts of sh codes (running in Debian)
awk '/#/ {print > "file1";next} \
/smtp/ {print > "file2";next} \
{print > "file7"}' input
#
if [ -s file1 ] ; then
#IP type => 11.22.33.44#55878:
cut -d'#' -f1 file1 >> output
rm -f file1
fi
#
if [ -s file2 ] ; then
#IP type => (smtp:55.66.77.88)
cut -d':' -f2 file2 | cut -d')' -f1 >> output
rm -f file2
fi
#
if [ -s file7 ] ; then
#IP type => cpe-33-22-11-99.buffalo.res.rr.com[99.11.22.33]
cut -d'[' -f2 file7 | cut -d']' -f1 >> output
rm -f file7
fi
then output
11.22.33.44
11.22.33.43
55.66.77.88
55.66.77.89
99.11.22.33
99.11.22.34
Is it possible to merge these codes only with awk , something like
awk '/#/ {print | cut -d'#' -f1 > "file1";next} \
/smtp/ {print | cut -d':' -f2 | cut -d')' -f1 > "file2";next} \
{print | cut -d'[' -f2 file7 | cut -d']' > "file7"}' input
I am newbie and have no idea for this,
After search questions, still no help.
any hint?
Thanks.
Best Regard.

Answer 1

$ awk -F'[][()#]|smtp:' '/#/{print $1;next} /smtp/{print $3;next} /\[/{print $2}' input
11.22.33.44
11.22.33.43
55.66.77.88
55.66.77.89
99.11.22.33
99.11.22.34
To save this in the file output:
awk -F'[][()#]|smtp:' '/#/{print $1;next} /smtp/{print $3;next} /\[/{print $2}' input >output
How it works
-F'[][()#]|smtp:'
This sets the field separator to (a) any of the characters ][()# or (b) the string smtp:.
/#/{print $1;next}
If the line contains #, then print the first field and skip to the next line.
/smtp/{print $3;next}
If the line contains smtp, then print the third field and skip to the next line.
/\[/{print $2}
If the line contains [, then print the second field.
Variation
There is more than one way to solve this problem, For example, using a slightly different field separator, we can still get the desired output:
$ awk -F'[][()#:]' '/#/{print $1;next} /smtp/{print $3;next} /\[/{print $2}' input
11.22.33.44
11.22.33.43
55.66.77.88
55.66.77.89
99.11.22.33
99.11.22.34