EXEC_SHELL_PATH=$(command -v bash)

export THUMBNAIL_DIR="$HOME/.cache/lf/epub"

set -e

# Define cleanup function to close file descriptor and remove FIFO file
cleanup() {
    exec 3>&-
    rm "$FIFO_UEBERZUG"
}

# Check if running over SSH and exit if true
[[ -n $SSH_CLIENT || -n $SSH_TTY ]] && exit 0

# Create necessary directories
[[ ! -d $HOME/.cache/lf ]] && mkdir -p "$HOME/.cache/lf"
export FIFO_UEBERZUG="$HOME/.cache/lf/ueberzug-$$"
mkfifo "$FIFO_UEBERZUG"

# Start ueberzugpp in background
ueberzugpp layer -s <"$FIFO_UEBERZUG" -p json &
exec 3>"$FIFO_UEBERZUG"
trap cleanup EXIT

case "$1" in
    *.epub)
        EPUB_FILE="$1"
        THUMBNAIL_DIR="$HOME/.cache/lf/epub"
        mkdir -p "$THUMBNAIL_DIR"
        THUMBNAIL_PATH="${THUMBNAIL_DIR}/${EPUB_FILE%.epub}.png"
        
        # Check if the thumbnail exists, if not, generate it
        if [[ ! -f $THUMBNAIL_PATH ]]; then
            $HOME/.config/lf/epub_thumbnailer.sh "$EPUB_FILE" 256
        fi
        
        # Open the generated thumbnail with nsxiv
        nsxiv "$THUMBNAIL_DIR" &    
	# just a workaround, will fix to display the file instead of the
	# whole folder        
	;;
    *)
        exit 0
        ;;
esac