loop find mp3 in sub-folders, bypass when ok (already done), add BPM to etag (bypass if already)

bmp_mp3.sh

#!/bin/zsh
## DEBIAN https://www.ryananddebi.com/2023/12/09/linux-adding-bpm-to-id3-tags/
# Directory containing music files
MUSIC_DIR="$1"
echo $MUSIC_DIR
sleep 1

if [[ $2 == "--force" ]];then
    BYPASS_IF_OK_EXISTE="false" 
else
    BYPASS_IF_OK_EXISTE="true" # true == if .ok existe, bypass
fi

if [[ $2 == "--ls" ]];then
    ls -lha "$MUSIC_DIR"
    exit 0
fi
if [[ $2 == "--rm" ]];then
    rm "$MUSIC_DIR/.ok"
    ls -lha "$MUSIC_DIR"
    exit 0
fi




# Loop through each file in the directory
# Chercher tous les sous-dossiers ne contenant pas le fichier .ok
find "$MUSIC_DIR" -type d -print | while read -r dir; do
    
    echo
    echo "BYPASS_IF_OK_EXISTE == $BYPASS_IF_OK_EXISTE"
    # Vérifie si le fichier .ok existe déjà
    if [[ (-e "$dir/.ok") && ($BYPASS_IF_OK_EXISTE == "true") ]]; then
    
        echo "_________"
        echo "_________"
        echo "Le fichier .ok existe déjà dans..."
        echo $dir
        echo "_________"
        echo "_________"
        echo
    
    else
        echo
        echo
        echo "Traitement du dossier : "
        echo "----- $dir"
        
        mp3_total=$(find "$dir" -maxdepth 1 -type f \( -name "*.mp3" -o -name "*.flac" \) | wc -l)
        mp3_count=0
        bpm_exists=0

        # /// FIND IN SUB FOLDERS
        find "$dir" -maxdepth 1 -type f \( -name "*.mp3" -o -name "*.flac" \) | while read -r file; do
            mp3_count=$((mp3_count+1))
            filename=$(basename "$file")

            sleep 0.1
            echo
            echo
            echo
            echo "------------------------"
            echo $dir
            echo "  ------ : $filename"

            # /// CHECK IF BPM ALREADY EXISTS
            BPM_PRESENT=$(eyeD3 "$file" | grep -i 'bpm:' | awk '{print $2}')
            if [ -n "$BPM_PRESENT" ]; then
                echo "---OK BPM déjà présent ( $BPM_PRESENT ), on saute ce fichier."
                bpm_exists=$((bpm_exists+1))
            else 
                BPM=$(bpm-tag -f "$file")
                echo "---- GO - Calculated BPM: ( $BPM )"
                echo
            fi

            
            # SI LA TOUT TRAITE (todo -- less restrictiv, if just 1 is done (so, the folder is checked))
            # if [ $mp3_total = $mp3_count ]; then
            if [ $mp3_count -gt 0 ]; then


                touch "$dir/.ok"
                
                echo
                echo "_________"
                echo "_________"
                echo "_________"
                echo "_________"
                echo "Fichier .ok créé dans $dir"
                echo "_________"
                echo "_________"
                echo "_________"
                echo "_________"
                echo
                sleep 1
            else 
                echo $mp3_count
                echo "---- OOO"
                sleep 0
            fi
            echo

        done

    fi        

    
done