How to generate html from bash?

Question

bash

Hello.
There are some reports, many reports. They add up to the following file structure:
/reports
|__Year
|__Month_1
| |__Day_1
| | |__report_1.html
| | |__report_2.html
| | |__report_n.html
| |__Day_2
| |__report.....
|__Month_2.......
etc.

It is necessary to collect html on the bashik with spoilers / nesting:
1st level - Year
2nd level - Month
3rd level - Day
reports

So far, we managed to pull all the files with paths through find, save them to a textbox.
We read the textbook line by line and extract from it the year, month, day
But then the dregs ....

#!/bin/bash

find reports/folder_1/folder_2/ -type f > links.txt

echo "Создаем body.html для PROD и добавляем details"
echo "<details>" > body.html

while read LINE;
do
  echo "$LINE"
    for l in $LINE
    do
    YEAR="$( cut -d '/' -f 4 <<< "$l" )"
    echo $YEAR
      if grep "$YEAR" body.html; then
      echo $YEAR
      else echo "
          <summary>$YEAR</summary> <br>" >> body.html
      fi
      
    MONTH="$( cut -d '/' -f 5 <<< "$l" )"
    echo $MONTH
      if grep "$MONTH" body.html; then
      echo $MONTH
      else echo "<details>
          <summary>$MONTH</summary> <br>" >> body.html
      fi
      
    DAY="$( cut -d '/' -f 6 <<< "$l" )"
    echo $DAY
      if grep "$DAY" body.html; then
      echo $DAY
      else echo "<details>
          <summary>$DAY</summary> <br>" >> body.html
      fi
    
        DIRPATH=${LINE%/}
        echo $DIRPATH
        for file in $DIRPATH/*
        do
        NAME="$( cut -d '/' -f 7 <<< "$l" )"
        echo $NAME
        echo "<a href="$LINE"  class="rep-btn">$NAME</a> <br>"   >> body.html
        done
      echo "</details>" >>body.html
    done	
    

done < links.txt

I would appreciate any help)