#!/bin/bash

# This script was written entirely by ChatGPT 4.

# Check for an argument
if [ $# -eq 0 ]; then
    echo "Usage: $0 filename"
    exit 1
fi

# A function to convert a string to Lisp case
to_lisp_case() {
    echo "$1" | awk '{ gsub(/_/,"-"); print tolower($0) }' | sed 's/[A-Z]/-\L&/g' | sed 's/^-//'
}

# The filename is the first argument
file="$1"

# Check if the file exists
if [ ! -f "$file" ]; then
    echo "Error: File does not exist."
    exit 1
fi

# Convert the filename to Lisp case
new_name=$(to_lisp_case "$file")

# Rename the file if the new name is different from the original
if [ "$file" != "$new_name" ]; then
    mv -- "$file" "$new_name"
    echo "File renamed to $new_name"
else
    echo "File name is already in Lisp case."
fi