#!/bin/bash
if [ $# -eq 0 ]; then
    echo "Usage: $0 <profile>"
    exit 1
fi

profile="$1"
while IFS=, read -r version backingversion url
do
    vhd=$(basename "$url" | sed -E "s/.app/.vhd/")
    if [ -f "images/vhd/$vhd" ]; then
        input=$(vhdiinfo images/vhd/$vhd)

        identifier=$(echo "$input" | grep -i "Identifier" | head -1 | awk '{print $NF}')
        parent_identifier=$(echo "$input" | grep -i "Parent identifier" | awk '{print $NF}')
        parent_filename=$(echo "$input" | grep -i "Parent filename" | awk -F': ' '{print $2}')
        if [ -n "$(printf "%s" "$parent_filename" | tr -d '\000-\177')" ]; then
            echo "Parent filename contains non-ASCII characters"
            str=$(strings -e l images/vhd/$vhd | head -n 1)
            be=$(echo -n $str | iconv -f UTF-8 -t UTF-16BE | xxd -p -c1 | tr -d '\n ' | sed 's/../\\x&/g')
            le=$(echo -n $str | iconv -f UTF-8 -t UTF-16LE | xxd -p -c1 | tr -d '\n ' | sed 's/../\\x&/g')
            mv images/vhd/$vhd images/vhd/$vhd.old
            bbe -e "s/$le/$be/" images/vhd/$vhd.old | pv -s $(stat --printf="%s" images/vhd/$vhd.old) > images/vhd/$vhd

            echo $parent_filename
            
        else
            echo "Parent filename contains only ASCII characters"
        fi
    else 
        echo "images/vhd/$vhd not found"
    fi

done < profiles/$profile/apps.csv