#!/bin/bash

interval=0
interface="enp4s0"

datetime() {
    icon=""
    time="$(date "+%a, %d %b %H:%M")"
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s" "$icon" "$time"
}

battery() {
    icon=""
    battery="$(acpi | awk -F '[, :]' '{ print $6 }')" # without time
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s" "$icon" "$battery"
}

cpu() {
    icon=""
    read cpu a b c previdle rest < /proc/stat
    prevtotal=$((a+b+c+previdle))
    sleep 0.5
    read cpu a b c idle rest < /proc/stat
    total=$((a+b+c+idle))
    cpu=$((100*( (total-prevtotal) - (idle-previdle) ) / (total-prevtotal) ))
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s" "$icon" "$cpu%"
}

memory() {
    icon=""
    mem="$(free -h | awk '/^Mem/ { print $3"/"$2 }' | sed s/i//g)"
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s" "$icon" "$mem"
}

disk() {
    icon=""
    root="$(df / | awk '/^\// { print $5 }')"
    home="$(df /home | awk '/^\// { print $5 }')"
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ / %s | /home %s" "$icon" "$root" "$home"
}

networkspeed() {
    icon="龍"
    up=""
    down=""
    R1="$(cat /sys/class/net/$interface/statistics/rx_bytes)"
    T1="$(cat /sys/class/net/$interface/statistics/tx_bytes)"
    sleep 1
    R2="$(cat /sys/class/net/$interface/statistics/rx_bytes)"
    T2="$(cat /sys/class/net/$interface/statistics/tx_bytes)"
    TBPS="$(expr $T2 - $T1)"
    RBPS="$(expr $R2 - $R1)"
    TKBPS="$(expr $TBPS / 1024)"
    RKBPS="$(expr $RBPS / 1024)"
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s %skB/s %s %skB/s" "$icon" "$up" "$TKBPS" "$down" "$RKBPS"
}

networkinfo() {
    icon=""
    IPADDR="$(ip a show dev $interface | awk '/inet / { print $2 } ')"
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s [%s]" "$icon" "$interface" "$IPADDR"
}

song() {
    icon=""
    song=$(playerctl --player=spotify,mpd metadata title)
    artist=$(playerctl --player=spotify,mpd metadata artist)
    printf "^b#8FBCBB^^c#2E3440^ %s ^d^ %s - %s" "$icon" "$artist" "$song"
}

while true; do 
    xsetroot -name " $(cpu) $(memory) $(networkspeed) $(networkinfo) $(disk) $(song) $(datetime) "
    sleep 8
done