#!/bin/sh

LOW_USED_COLOR="#b8bb26"
MEDIUM_USED_COLOR="#fabd2f"
HIGH_USED_COLOR="#fb4934"
DEFAULT_USED_COLOR="#d5c4a1"
UNUSED_COLOR="#a88984"

usage=$1
width=$2
usage_color=$3

command -v "$1" >/dev/null && usage=$($1)

low_used=$((width * 30 / 100))
medium_used=$((width * 60 / 100))
num_used_chars=$(echo "scale=0; ($usage * $width) / 100" | bc -l)

if [ -n "$usage_color" ]; then
	case "$num_used_chars" in
		[0-$low_used]) used_color="$LOW_USED_COLOR" ;;
		[$low_used-$medium_used]) used_color="$MEDIUM_USED_COLOR" ;;
		*) used_color="$HIGH_USED_COLOR" ;;
	esac
else
	used_color="$DEFAULT_USED_COLOR"
fi

i=1
while [ "$i" -le "$width" ]; do
	if [ "$i" -le "$num_used_chars" ]; then
		bar="$bar<fc=$used_color>#</fc>"
	else
		bar="$bar<fc=$UNUSED_COLOR>:</fc>"
	fi
	i=$((i + 1))
done

echo "$bar"