Bash Getting each line of file to awk and have each column as a separate variable to run a command

Im trying to get this to take each line of a file that is formatted like 0310 05:00:00 AM and use the 0310 to open ####_Dealer_schedule.txt and then grep the time followed by adding each result to an output file. I've attempted to redo it repeatedly but end up scrapping the result as its just not working.

Code:

#!/bin/bash


echo "You have opened the Roulette Dealer Finder Program!"
echo "Do you have a list of dates and time? If so, run this script with the file as the arg"
echo "Make sure it is formatted as MMDD TIME"

#if the didnt give a file just ask them all the things
if [ -z "$1" ]
then
        echo "Enter Date as MMDD:"
        read date

        echo "Enter the Hour as ##:"
        read hour

        echo "Is this AM or PM?"
        echo "1) AM"
        echo "2) PM"
        read meridiem

        if [ "${meridiem}" = 1 ]; then
                echo "Here is the Roulette Dealer for" ${hour} "AM:"
                awk -F" " '{print $1,$2,$5,$6}' $date\_Dealer_schedule.txt | grep -i "${hour}:00:00 AM"

        elif [ "${meridiem}" = 2 ]; then
                echo "Here is the Roulette Dealer for" ${hour} "PM:"
                awk -F" " '{print $1,$2,$5,$6}' $date\_Dealer_schedule.txt | grep -i "${hour}:00:00 PM"
        else
                echo "You didnt pick from the available options..."
                echo "you selected: "${meridiem}
                echo "Please select either '1' or '2' next time."
        fi

# Now we want to do the thing for each of the lines in the file
else
        #slowly lose mind until it works or brain explodes
fi

List File:

0310 05:00:00 AM
0310 08:00:00 AM
0310 02:00:00 PM
0310 08:00:00 PM
0310 11:00:00 PM
0312 05:00:00 AM
0312 08:00:00 AM
0312 02:00:00 PM
0312 08:00:00 PM
0312 11:00:00 PM
0315 05:00:00 AM
0315 08:00:00 AM
0315 02:00:00 PM

Here is a list of what I have tried:

Testvar:

        testvar=$(awk '{print $1}' $1 | uniq)

        head ${testvar}\_Dealer_schedule.txt

This output:

head: cannot open '0310' for reading: No such file or directory
head: cannot open '0312' for reading: No such file or directory
==> 0315_Dealer_schedule.txt <==
Hour AM/PM	BlackJack_Dealer_FNAME LAST	Roulette_Dealer_FNAME LAST	Texas_Hold_EM_dealer_FNAME LAST

12:00:00 AM	Izabela Parrish	Marlene Mcpherson	Madina Britton
01:00:00 AM	Billy Jones	Saima Mcdermott	Summer-Louise Hammond
02:00:00 AM	Summer-Louise Hammond	Abigale Rich	John-James Hayward
03:00:00 AM	John-James Hayward	Evalyn Howell	Chyna Mercado
04:00:00 AM	Chyna Mercado	Cleveland Hanna	Katey Bean
05:00:00 AM	Katey Bean	Billy Jones	Evalyn Howell
06:00:00 AM	Evalyn Howell	Saima Mcdermott	Cleveland Hanna
07:00:00 AM	Cleveland Hanna	Abigale Rich	Billy Jones

Xargs:

        xargs < $1 -n 2 | awk -F" " '{print $1,$2}' > tempt.txt
        wc tempt.txt 
        awk -F" " '{print $1}' temp.txt
        #awk -F" " '{print $2}' temp.txt

this output:

 20  39 222 tempt.txt
awk: fatal: cannot open file `temp.txt' for reading (No such file or directory)

Array:

        i=0
        while read line
        do 
          array[$((++i))]=$line
          echo ${array[$i]}
        done < $1

This output:

find_the_dealer.sh: 37: array[0]=0310: not found
find_the_dealer.sh: 38: Bad substitution

What would you use awk for? Of course awk can open and handle additional files (other than its standard input), but this is somewhat easier to do in pure Bash. Here’s an ugly, inefficient hack, to show the basic principle:

while read -r prefix time meridiem discard; do
  grep -- "^${time} ${meridiem}" \
          "/path/to/${prefix}_Dealer_schedule.txt"
done < /path/to/list > /path/to/output

Now let’s make this↑ slightly more reasonable and efficient (fewer grep invocations, fewer file traversals):

declare -A prefix_times=()

while read -r prefix time meridiem discard; do
  prefix_times["$prefix"]+="|${time} ${meridiem}"
done < /path/to/list

for prefix in "${!prefix_times[@]}"; do
  grep -E -- "^(${prefix_times["$prefix"]:1})" \
             "/path/to/${prefix}_Dealer_schedule.txt"
done > /path/to/output