#!/bin/bash

mapfile -t mem < <( free --mega | tail -n +2)

IFS=$'\n' mem=($(sort <<<"${mem[*]}"))
unset IFS

barWidth=38
clear="\e[39m\e[0m"
usageColor="\e[33m"
buffColor="\e[36m"

printf '\nMemory:\n'

for point in "${mem[@]}"; do
    # printf "$point"
    IFS=" " read TYPE USED TOTAL CACHE <<<$(echo "${point}" | awk {'print $1,$3,$2,$6'} | sed 's/://')
    CACHE=$((CACHE+0))
    usedBarWidth=$((barWidth*USED/TOTAL))
    cachedBarWidth=$((barWidth*CACHE/TOTAL))
    barContent="${usageColor}"
    for sep in $(seq 1 $usedBarWidth); do
        barContent="${barContent}―"
    done
    barContent="${barContent}${buffColor}"
    for sep in $(seq 1 $cachedBarWidth); do
        barContent="${barContent}―"
    done
    barContent="${barContent}${clear}"
    for sep in $(seq 1 $(($barWidth-$usedBarWidth-$cachedBarWidth))); do
        barContent="${barContent}―"
    done
    bar="${barContent}${clear}"
    printf "  %-4s used ${usageColor}%2s${clear} Gi cache ${buffColor}%3s${clear} Gi of %3s Gi\n" "$TYPE" "$(($USED/1024))" "$(($CACHE/1024))"  "$(($TOTAL/1024))"

	echo -e "  ${bar}"

done