#!/bin/bash

[[ "$BLOCK_BUTTON" == 2 ]] && i3-sensible-terminal -e htop

[[ "$BLOCK_INSTANCE" =~ "long" || "$BLOCK_BUTTON" == 1 ]] && LONG=true

if [[ "$BLOCK_INSTANCE" =~ "ram" ]]; then
   TYPE='swap'
elif [[ "$BLOCK_INSTANCE" =~ "swap" ]]; then
   TYPE='swap'
fi

gawk -v TYPE="$TYPE" -v LONG="$LONG" '
    /^MemTotal/ {
        rtg = $2 / 1024^2
    }
    /^MemAvailable/ {
        rfg = $2 / 1024^2
	    rfm = $2 / 1024
    } 
    /^SwapTotal/ {
        stg = $2 / 1024^2
    }
    /^SwapFree/ {
        sfg = $2 / 1024^2
	    sfm = $2 / 1024
    } 
    END {
        if (TYPE == "") {
            mfg = rfg + sfg
            mfm = rfm + sfm
            mtg = rtg + stg
        } else if (TYPE == "ram") {
            mfg = rfg
            mfm = rfm
            mtg = rtg
        } else if (TYPE == "swap") {
            mfg = sfg
            mfm = sfm
            rtg = stg
        }
        if (LONG == "true") {
            if (TYPE == "") {
                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 (mfg > 2) {
                    printf("%d G\n", mfg)
                    printf("%dG\n", mfg)
                    mfg = rfg
                } else {
                    printf("%d M\n", mfm)
                    printf("%dM\n", mfm)
                }
            }
        } else {
            load = mfg / mtg
            if (load < 100 / 9) {
                printf("▁\n▁\n")
            } else if (load < 100 / 9 * 2 ) {
                printf("▁\n▁\n")
            } else if (load < 100 / 9 * 3 ) {
                printf("▂\n▂\n")
            } else if (load < 100 / 9 * 4 ) {
                printf("▃\n▃\n")
            } else if (load < 100 / 9 * 5 ) {
                printf("▄\n▄\n")
            } else if (load < 100 / 9 * 6 ) {
                printf("▅\n▅\n")
            } else if (load < 100 / 9 * 7 ) {
                printf("▆\n▆\n")
            } else if (load < 100 / 9 * 8 ) {
                printf("▇\n▇\n")
            } else {
                printf("█\n█\n")
            } 
        }
        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