#!/bin/bash

filename="$1"

# Check if the filename contains a period
if [[ $filename == *.* ]]; then
	# Extract the filename without the extension
	name="${filename%.*}"
	# Extract the extension
	extension=".${filename##*.}"
else
	# If there's no extension, the name is the whole filename
	name=$filename
	extension=""
fi

echo "Filename without extension: $name"
echo "Extension (if any): $extension"

generate_filename() {
	echo "${name}_${counter}${extension}"
}


if [ ! -f ${filename} ]; then
	echo ${filename}
	exit;
fi

counter=1

# Check if the file exists and increment the counter until a unique filename is
# found
while [ -f $(generate_filename) ]; do
    ((counter++))
done

echo $(generate_filename)