#!/bin/bash

[[ "$BLOCK_BUTTON" == 1 ]] && i3-sensible-terminal -e htop

case "${BLOCK_INSTANCE}" in
    swap) TYPE="swap";;
    ram) TYPE="ram";;
    *) TYPE="";;
esac

gawk -v TYPE="$TYPE" '
    /^MemAvailable/ {
        rfg = $2 / 1024^2
	    rfm = $2 / 1024
    } 
    /^SwapFree/ {
        sfg = $2 / 1024^2
	    sfm = $2 / 1024
    } 
    END {
        if (TYPE == "") {
            mfg = rfg + sfg
            mfm = rfm + sfm
            if (mfg > 2) {
                printf("%d+%d G\n", rfg, sfg)
                printf("%d+%dG\n", rfg, sfg)
            } else {
                printf("%d+%d M\n", rfm, sfm)
                printf("%d+%dM\n", rfm, sfm)
            }
        } else if (TYPE == "ram") {
            if (rfg > 2) {
                printf("%d G\n", rfg)
                printf("%dG\n", rfg)
                mfg = rfg
            } else {
                printf("%d M\n", rfm)
                printf("%dM\n", rfm)
            }
        } else if (TYPE == "swap") {
            if (sfg > 2) {
                printf("%d G\n", sfg)
                printf("%dG\n", sfg)
                mfg = sfg
            } else {
                printf("%d M\n", sfm)
                printf("%dM\n", sfm)
            }
        }
        if (mfg > 5) {
             print("#04B431\n")
         } else if (mfg > 4) {
             print("#A8FF00\n")
         } else if (mfg > 3) {
             print("#FFF600\n")
         } else if (mfg > 2) {
             print("#FFAE00\n")
         } else if (mfg > 1) {
             print("#FF0000\n")
         } else {
             exit 33
         } 
    }
' /proc/meminfo