How to assign awk result variable to an array and is it possible to use awk inside another awk in loop - bash

Question

I've started to learn bash and totally stuck with the task. I have a comma separated csv file with records like:
id,location_id,organization_id,service_id,name,title,email,department
1,1,,,Name surname,department1 department2 department3,,
2,1,,,name Surname,department1,,
3,2,,,Name Surname,"department1 department2, department3",, e.t.c.
I need to format it this way: name and surname must start with a capital letter
add an email record that consists of the first letter of the name and full surname in lowercase
create a new csv with records from the old csv with corrected fields.
I split csv on records using awk ( cause some fields contain fields with a comma between quotes "department1 department2, department3" ).
#!/bin/bash
input="$HOME/test.csv"
exec 0<$input
while read line; do
awk -v FPAT='"[^"]*"|[^,]*' '{
...
}' $input)
done
inside awk {...} (NF=8 for each record), I tried to use certain field values ($1 $2 $3 $4 $5 $6 $7 $8):
#it doesn't work
IFS=' ' read -a name_surname<<<$5 # Field 5 match to *name* in heading of csv
# Could I use inner awk with field values of outer awk ($5) to separate the field value of outer awk $5 ?
# as an example:
# $5="${awk '{${1^}${2^}}' $5}"
# where ${1^} and ${2^} fields of inner awk
name_surname[0]=${name_surname[0]^}
name_surname[1]=${name_surname[1]^}
$5="${name_surname[0]}' '${name_surname[1]}"
email_name=${name_surname[0]:0:1}
email_surname=${name_surname[1]}
domain='#domain'
$7="${email_name,}${email_surname,,}$domain" # match to field 7 *email* in heading of csv
how to add field values ($1 $2 $3 $4 $5 $6 $7 $8) to array and call function join for each for loop iteration to add record to new csv file?
function join { local IFS="$1"; shift; echo "$*"; }
result=$(join , ${arr[#]})
echo $result >> new.csv

Answer 1

This may be what you're trying to do (using gawk for FPAT as you already were doing) but without more representative sample input and the expected output it's a guess:
$ cat tst.sh
#!/usr/bin/env bash
awk '
BEGIN {
OFS = ","
FPAT = "[^"OFS"]*|\"[^\"]*\""
}
NR > 1 {
n = split($5,name,/\s*/)
$7 = tolower(substr(name[1],1,1) name[n]) "#example.com"
print
}
' "${#:--}"
$ ./tst.sh test.csv
1,1,,,Name surname,department1 department2 department3,nsurname#example.com,
2,1,,,name Surname,department1,nsurname#example.com,
3,2,,,Name Surname,"department1 department2, department3",nsurname#example.com,
I put the awk script inside a shell script since that looks like what you want, obviously you don't need to do that you could just save the awk script in a file and invoke it with awk -f.

Answer 2

Completely working answer by Ed Morton.
If it may be will be helpful for someone, I added one more checking condition: if in CSV file more than one email address with the same name - index number is added to email local part and output is sent to file
#!/usr/bin/env bash
input="$HOME/test.csv"
exec 0<$input
awk '
BEGIN {
OFS = ","
FPAT = "[^"OFS"]*|\"[^\"]*\""
}
(NR == 1) {print} #header of csv
(NR > 1) {
if (length($0) > 1) { #exclude empty lines
count = 0
n = split($5,name,/\s*/)
email_local_part = tolower(substr(name[1],1,1) name[n])
#array stores emails from csv file
a[i++] = email_local_part
#find amount of occurrences of the same email address
for (el in a) {
ret=match(a[el], email_local_part)
if (ret == 1) { count++ }
}
#add number of occurrence to email address
if (count == 1) { $7 = email_local_part "#abc.com" }
else { --count; $7 = email_local_part count "#abc.com" }
print
}
}
' "${#:--}" > new.csv