#!/bin/bash

# 1: last minute
cpu() {
    CPULOAD=$(cut -d " " -f 1 /proc/loadavg)
    printf " (%s%%)" "$CPULOAD"
}

mail() {
    NEWMAIL=$(expr $(ls -1 ~/mail/*/INBOX/new | wc -l) - 7)

    if [ "${NEWMAIL%% *}" -eq 0 ]; then
        printf " (%s)" "${NEWMAIL%% *}"
    else
        printf " (%s)" "${NEWMAIL%% *}"
    fi
}

battery() {
    CHARGE=$(cat /sys/class/power_supply/BAT0/capacity)
    STATUS=$(cat /sys/class/power_supply/BAT0/status)
    if [ "$STATUS" = "Charging" ]; then
        printf "  %s%%" "$CHARGE"
    else
        if [ "$CHARGE" -le 30 ]; then
            printf " %s%%" "$CHARGE"
        elif [ "$CHARGE" -le 60 ]; then
            printf " %s%%" "$CHARGE"
        elif [ "$CHARGE" -le 90 ]; then
            printf "  %s%%" "$CHARGE"
        else
            printf " %s%%" "$CHARGE"
        fi
    fi
}

volume() {
    VOL=$(amixer get Master | tail -n1 | sed -r "s/.*\[(.*)%\].*/\1/")

    if [ "$VOL" -eq 0 ]; then
        printf "🔇"
    elif [ "$VOL" -gt 0 ] && [ "$VOL" -le 33 ]; then
        printf "🔈%s%%" "$VOL"
    elif [ "$VOL" -gt 33 ] && [ "$VOL" -le 66 ]; then
        printf "🔉%s%%" "$VOL"
    else
        printf "🔊%s%%" "$VOL"
    fi
}

memory() {
    USED=$(free | awk '(NR == 2) {print $3}')
    TOTL=$(free | awk '(NR == 2) {print $2}')
    FRAC=$(tail -c 3 <<< $((${USED}00/$TOTL)))
    USED=$(free -h | awk '(NR == 2) {print $3}')

    printf " %s(%d%%)" "$USED" "$FRAC" 
}

weather() {
    curl wttr.in?format="%c+%t"
}

datetime() {
	date '+%Y-%m-%d %A %H:%M'
}

ipaddr() {
    for i in $(ip r); do echo "$i"; done | grep -A 1 src | tail -n1
}

dostatus() {
    xsetroot -name "$VOL│$MEM│$IP│$CPU│$NML│$WTR│$TIM" 
    # xsetroot -name "$VOL│$BAT│$MEM│$IP│$CPU│$NML│$WTR│$TIM" 
    # echo "$VOL│$BAT│$MEM│$IP│$CPU│$NML│$WTR│$TIM" 
}

# signal handlers
refresh_volume() {
    VOL=$(volume)
}


refresh_battery() {
    BAT=$(battery)
}

refresh_memory() {
    MEM=$(memory)
}

refresh_ip() {
    IP=$(ipaddr)
}


refresh_cpu() {
    CPU=$(cpu)
}

refresh_mail() {
    NML=$(mail)
}

refresh_weather() {
    WTR=$(weather)
}

refresh_time() {
    TIM=$(datetime)
}

refresh_all() {
    refresh_volume
    refresh_battery
    refresh_ip
    refresh_cpu
    refresh_mail
    refresh_weather
    refresh_time
}

trap "refresh_volume"  35
trap "refresh_battery" 36
trap "refresh_memory"  37
trap "refresh_ip"      38
trap "refresh_cpu"     39
trap "refresh_weather" 40
trap "refresh_time"    41
trap "refresh_all"     42

while true # ip address
do
    sleep 2h
    refresh_ip
    refresh_weather
done &

refresh_volume
refresh_weather
refresh_ip
while true
do
    refresh_battery
    refresh_memory
    refresh_cpu
    refresh_mail
    refresh_time
    dostatus
    sleep 1m & wait $!
done