Downloading Teratoma

#!/bin/bash

if ! command -v yt-dlp &> /dev/null
then
    echo "yt-dlp could not be found. Install it using 'pip install yt-dlp'."
    exit
fi

if ! command -v eyeD3 &> /dev/null
then
    echo "eyeD3 could not be found. Install it using 'pip install eyeD3'."
    exit
fi

ARTIST="VISCERA INFEST"
ALBUM="Teratoma"
GENRE="Goregrind"
COVER="https://www.metal-archives.com/images/1/2/5/4/1254583.jpg?2650"
URL="https://www.youtube.com/watch?v=0LO6I5MJ-TM"

mkdir -p "$ALBUM" 
cd "$ALBUM"

if ! wget -O cover.jpg "$COVER"; then
    echo "Error: Failed to download cover art from $COVER"
    exit 1
fi

if ! yt-dlp -x \
       --audio-format mp3 \
       --split-chapters \
       --output "%(title)s-%(section_number)s %(section_title)s.%(ext)s" \
       "$URL" ; then    
    echo "Error: Failed to download tracks from $URL"
    exit 1
fi

# Loop through all MP3 files in the current directory
for file in *.mp3; do 
    if [[ -f "$file" ]]; then
        # Extract the correct track number (second numeric sequence after the first hyphen)
        track=$(echo "$file" | sed -n 's/.*- \([0-9]\{3\}\) \([0-9]\{2\}\)\..*/\2/p')

        # Extract the title (everything after the section number and period)
        title=$(echo "$file" | sed 's/.*- [0-9]\{3\} [0-9]\{2\}\. \(.*\)\.mp3/\1/')

        if [[ -z "$track" ]]; then
            echo "Warning: Could not extract a valid track number for $file. Skipping."
            continue
        fi

        new_filename="${track}. ${title}.mp3"
        mv "$file" "$new_filename"

        # Use eyeD3 to set metadata
        eyeD3 --to-v2.3 \
              --title "$title" \
              --artist "$ARTIST" \
              --album "$ALBUM" \
              --genre "$GENRE" \
              --release-date "2024" \
              --track "$track" \
              --add-image "cover.jpg:FRONT_COVER" \
              "$new_filename"
    fi
done