#!/bin/bash

#TODO:
# EUR
# RUB

vars=( $(echo {a..z}) )
count=-1
prompt=' '
mesg=""
# menu=dmenu
menu="rofi -dmenu"

while eqn=$(echo | rofi -dmenu -lines 0 -theme Monokai -mesg "$mesg" -p "$prompt  "); do
	[[ $eqn ]] || exit

	echo $eqn | grep '#'

	if [ "$?" == 0 ]; then
		comment="#$(echo $eqn | cut -d '#' -f 2-)"
	else
		comment=""
	fi

	# if ans=$(calc -pd “$(eval echo $(echo $eqn | sed ‘s/([a-z])/$\1/g’))”); then
	exp=$(eval echo $(echo \"$eqn\" | sed 's/#.*"/"/; s/\([a-z]\)/$\1/g'))

	echo = $exp

	if ans=$(echo "$exp" | bc -l); then
		echo -n $ans | xclip
		count=$(( $count + 1 ))

		[[ $count -gt 25 ]] && count=0

		eval ${vars[$count]}=$ans

		# prompt="$prompt  $(eval echo ${vars[$count]}=$ans)"
		# mesg=$(echo "$mesg\n  ${vars[$count]}  $exp  $ans \t $comment")
		# printf "%50s\n" "This field is 50 characters wide..."
		mesg=$(printf "$mesg\n  %s  %-10s  %-10s %s" ${vars[$count]} $exp $ans $comment)
	fi
done