awk to add text to file based on coordinates - awk

Question

In the below awk (which executes but produces an empty output) I am using the $4 in file1 as a unique id and reading each $1, $2, and $3 value into a variable chr, min, and max.
The $4 is then split on the _ in file2 and read into array. Each value in the split will match a $4 id in file1 The chr needs to match the $1, the min and max must be between the $2 and $3 values in file2.
An exact match is not needed rather just that the min or max variables falls within $2 and $3. If that is true then exon is printed in $5 of file1, if it is not true then intron is printed in $5.
The desired output has the exon/intron added to it but there is another part where the values in $2 or $3 are adjusted but I am trying to script that before I ask. I am not sure if the below is the best way but hopefully it is a start. Thank you :).
file1 tab delimited except for whitespace after $3 and $4
chr7 94027591 94027701 COL1A2
chr6 31980068 31980074 TNXB
file2 tab delimited
chr7 94027059 94027070 COL1A2_cds_1_0_chr7_94027060_f 0 +
chr7 94027693 94027708 COL1A2_cds_2_0_chr7_94027694_f 0 +
chr6 32009125 32009227 TNXB_cds_0_0_chr6_32009126_r 0 -
chr6 32009547 32009711 TNXB_cds_1_0_chr6_32009548_r 0 -
desired output
chr7 94027683 94027701 COL1A2 exon
chr6 31980068 31980074 TNXB intron
awk w/ comments
awk '
FNR==NR{ open block process matching line in file 1 and file2
a[$4]; # use as a key with unique id
chr[$4]=$1; # store $1 value in chr
min[$4]=$2; # store $2 value in min
max[$4]=$3; # store $3 value in max
next # process next line
} # close block
{ # open block
split($4,array,"_"); # spilt $4 on underscore
print $0,(array[1] in a) && ($2<=min[array[1]] && $2<=max[array[1] && $1=chr[array[1]])?"exon":"intron"
}' file1 OFS="\t" file2 > output # close block, mention input with field separators and output

Answer 1

IMHO, your shown final output is NOT looking correct by logic, since Input_file2 has multiple entries and Input_file1 has only single ones(I am going by samples shown only). Could you please check this one once? If any changes in your output or logic then please do mention them clearly.
awk '
BEGIN{
SUBSEP=","
}
FNR==NR{
max[$1,$NF]=$3
min[$1,$NF]=$2
next
}
{
split($4,array,"_")
}
(($1,array[1]) in max){
if(($2>min[array[5],array[1]] && $2<max[array[5],array[1]]) || ($3>max[array[5],array[1]] && $3<max[array[5],array[1]])){
print array[5],array[1],min[array[5],array[1]],max[array[5],array[1]],"exon"
next
}
}
{
print $0,"intron"
}' Input_file1 Input_file2 | column -t
What this command is doing it is checking Input_file2's 2nd field OR 3rd field either they are coming in range of Input_file1's 2nd and 3rd field. If anyone of them is coming then I am printing Input_file1's output adding exon in it or else printing Input_file2's output adding intron string at last of it.