#!/bin/sh

# Set keyboard layout
setxkbmap \
    -option 'grp:alt_shift_toggle' \
    -option 'caps:swapescape' \
    'dvorak,ru'

# Battery
BATTERY="BAT0"
HAS_BATTERY="no"
LOW_BATTERY_LIMIT=20
if [ -d /sys/class/power_supply/$BATTERY ]; then
    HAS_BATTERY="yes"
fi

battery_is_charging() {
    battery_status=$(cat /sys/class/power_supply/$BATTERY/status)

    if [ $battery_status = "Charging" ]; then
        return 0;
    fi

    return 1;
}

battery_level() {
    echo $(cat /sys/class/power_supply/$BATTERY/capacity)
}

battery_level_too_low() {
    if [ $(eval battery_level) -lt $LOW_BATTERY_LIMIT ]; then
        return 0;
    fi

    return 1;
}

while true; do
    XROOTNAME="RAM: $(free -m | grep '^Mem' | awk '{print $3"MB"}') |"
    XROOTNAME="$XROOTNAME CPU: $(top -bn1 | awk '/Cpu/ { print $2}')% |"
    if [ $HAS_BATTERY = "yes" ]; then
        XROOTNAME="$XROOTNAME BAT: $(eval battery_level)%"
        if battery_level_too_low; then
            XROOTNAME="$XROOTNAME PLUG CHARGER"
        fi
        XROOTNAME="$XROOTNAME |"
    fi
    XROOTNAME="$XROOTNAME $(date +"%F %R")"

    xsetroot -name "$XROOTNAME"
    sleep 20s
done &

# Set wallpaper
xsetroot -solid gray
feh --bg-scale ./.fehbg/wallpaper.png

# Start window manager
exec dwm