#!/usr/bin/env bash

LOW_LEVEL=15
CRITICAL_LEVEL=5
HIBERNATE_LEVEL=3

LEVEL=$(cat /sys/class/power_supply/BAT0/capacity)
STATUS=$(cat /sys/class/power_supply/BAT0/status)

hibernate() {
  notify-send -a "Battery" "Hibernating!" -u critical

  # Give some time to plug the power in
  sleep 5

  # Hibernate if still discharging
  STATUS=$(cat /sys/class/power_supply/BAT0/status)
  if [[ "$STATUS" = "Discharging" ]]; then
    systemctl hibernate
  else
    notify-send -a "Battery" "Power was plugged in. Hibernation is cancelled!"
  fi
}

notify_critical() {
  notify-send -a "Battery" "Battery is critically low!" -u critical
}

notify_low() {
  notify-send -a "Battery" "Battery is low!"
}


if [[ "$STATUS" = "Discharging" ]]; then
  if [[ "$LEVEL" -le "$HIBERNATE_LEVEL" ]]; then
    hibernate
  elif [[ "$LEVEL" -le "$CRITICAL_LEVEL" ]]; then
    notify_critical
  elif [[ "$LEVEL" -le "$LOW_LEVEL" ]]; then
    notify_low
  fi
fi

[module/battery_notifier]
type = custom/script
exec = ~/.config/polybar/battery-notifier.sh
interval = 60