#!/bin/bash

# Prints out battery percentage

# Global config
source config

# At which levels to trigger emoji at
max=80
high=70
midhi=60
mid=40
low=20
warn=20
crit=5

# Emoji used by module
i_charging="󱐋 "
i_warning=" "
i_full=" "
i_high=" "
i_midhi=" "
i_mid=" "
i_low=" "
i_empty=" "

# status2d patch alternating background
# background="^b#333333^"
# background="^b#222222^"

# Read battery data
bat_data="/sys/class/power_supply/BAT?*"

get_battery() {
  icon=""
  bat_icon=""

  # The vast majority of people only use one battery.
  if [ ! -d $bat_data ]; then return; fi

  # Get battery capacity and charging state
  capacity=$(cat $bat_data/capacity)
  charging=$(cat $bat_data/status)

  # Add warning/charging symbols
  if [[ "$charging" == "Charging" ]]; then icon="$i_charging"
  elif [[ $capacity -le $warn ]]; then icon="$i_warning"
  fi

  # Change battery symbol depending on capacity
  if [[ $capacity -ge $max ]]; then bat_icon=$i_full
  else
    case 1 in
      $(($capacity < $crit)) ) bat_icon=$i_empty ;;
      $(($capacity < $low)) ) bat_icon=$i_low ;;
      $(($capacity < $mid)) ) bat_icon=$i_mid ;;
      $(($capacity < $midhi)) ) bat_icon=$i_midhi ;;
      $(($capacity < $high)) ) bat_icon=$i_high ;;
      * ) bat_icon=$i_full ;;
    esac
  fi

  # Normalize capacity to a value between 0 and 100
  capacity=$(awk -v cap="$capacity" -v max="$max" \
    'BEGIN { printf "%.0f", cap * 100 / max }')

  echo "$background$wb$icon$bat_icon $capacity%$we^d^"
}

get_battery