#!/bin/sh

volume() {
	volume="$(wpctl get-volume @DEFAULT_AUDIO_SINK@)"
	volume="$(dc -e "${volume#Volume:\ } 100 * p")"
	volume="${volume%.*}"
	if [ "$volume" -eq 0 ]; then
		symbol=
	elif [ "$volume" -le 50 ]; then
		symbol=
	else
		symbol=
	fi
	printf '%s %d%%' "$symbol" "$volume"
}

network() {
	ssid="$(iwctl station wlan0 get-networks | awk -F'  ' '/>/{print $3}')"
	if [ -n "$ssid" ]; then
		printf '󰖩  %s' "$ssid"
	else
		printf '󰖪 '
	fi
}

brightness() {
	printf ' %d%%' "$(brightctl)"
}

battery() {
	cap="$(cat /sys/class/power_supply/BAT0/capacity)"
	stat="$(cat /sys/class/power_supply/BAT0/status)"

	symbol=󰁹
	index=$(((cap-1)/10+1))
	case "$stat" in
		Discharging)
			symbol="$(printf '󰂃 󰁻 󰁼 󰁽 󰁾 󰁿 󰂀 󰂁 󰂂 󰁹' | cut -d' ' -f$index)"
			;;
		Charging)
			symbol="$(printf '󰢜 󰂆 󰂇 󰂈 󰢝 󰂉 󰢞 󰂊 󰂋 󰂅' | cut -d' ' -f$index)"
			;;
		Full)
			symbol=󰂄
			;;
	esac
	printf '%s %d%%' "$symbol" "$cap"
}

clock() {
	printf ' %s' "$(date '+%b %-d %H:%M:%S')"
}

# Make the volume and brightness sections appear to update in real time by
# polling more frequently when the user is changing them.
last_vol=
last_brt=
sleep_for=10
while true; do
	vol="$(volume)"
	brt="$(brightness)"
	if [ "$last_vol" != "$vol" ] || [ "$last_brt" != "$brt" ]; then
		sleep_for=1
	elif [ $sleep_for != 10 ]; then
		sleep_for=$((sleep_for+1))
	else
		sleep_for=10
	fi
	last_vol="$vol"
	last_brt="$brt"

	printf '%s | %s | %s | %s | %s\n' \
		"$vol" \
		"$(network)" \
		"$brt" \
		"$(battery)" \
		"$(clock)"
	sleep $((sleep_for/10)).$((sleep_for%10))
done