#!/usr/bin/env sh

######################################################################
# @author      : swytch (adapated from github.com/jschx/ufetch)
# @file        : fetch
# @license     : GPLv3
# @created     : Wednesday May 20, 2020 18:16:09 CEST
#
# @description : display system infos
######################################################################


## INFO

# $USER is already defined
host="$(cat /etc/hostname)"
os='Arch Linux'
kernel="$(uname -sr)"
uptime="$(uptime -p | sed 's/up //')"
packages="$(pacman -Q | wc -l)"
shell="$($SHELL --version | sed -e 's/(.*)//')"
wm="$(tail -n 1 "$XDG_CONFIG_HOME/X11/xinitrc" | rev | cut -d ' ' -f 1 | rev)"

# parse the '/proc/meminfo' file splitting on ':' and 'k'.
# the format of the file is 'key:   000kB' and an additional
# split is used on 'k' to filter out 'kB'.
while IFS=':k '  read -r key val _; do
	case $key in
		# MemUsed = MemTotal + Shmem - MemFree - Buffers - Cached - SReclaimable
		MemTotal)
			mem_used=$((mem_used + val))
			mem_total=$val
		;;

		Shmem)
			mem_used=$((mem_used + val))
		;;

		MemFree|Buffers|Cached|SReclaimable)
			mem_used=$((mem_used - val))
		;;
	esac
done < /proc/meminfo

mem_used=$((mem_used / 1024))
mem_total=$((mem_total / 1024))

# set colors
if [ -x "$(command -v tput)" ]; then
	bold="$(tput bold)"
	black="$(tput setaf 0)"
	red="$(tput setaf 1)"
	green="$(tput setaf 2)"
	orange="$(tput setaf 3)"
	yellow="$(tput setaf 11)"
	blue="$(tput setaf 4)"
	magenta="$(tput setaf 5)"
	cyan="$(tput setaf 6)"
	white="$(tput setaf 15)"
	reset="$(tput sgr0)"
fi

# you can change these
lc="${bold}${green}"                # labels
nc="${bold}${red}"                  # user and hostname
ic="${white}"                       # info
a0="${blue}"                        # first arch color
a1="${cyan}"                        # second arch color

cat <<EOF
${a0}                   ${nc}${USER}${ic}@${nc}${host}
${a0}         /\\        ${lc}OS:        ${ic}${os}
${a0}        /  \\       ${lc}KERNEL:    ${ic}${kernel}
${a0}       /\\   \\      ${lc}SHELL:     ${ic}${shell}
${a1}      /      \\     ${lc}WM:        ${ic}${wm}
${a1}     /   ,,   \\    ${lc}UPTIME:    ${ic}${uptime}
${a1}    /   |  |  -\\   ${lc}PACKAGES:  ${ic}${packages}
${a1}   /_-''    ''-_\\  ${lc}MEMORY:    ${ic}${mem_used}MiB/${mem_total}MiB

EOF