#!/usr/bin/env bash

# shellcheck source=/dev/null
source "$(dirname "$0")"/utils

icons=("" "" "")
date="$XDG_CACHE_HOME/eww/osd_brightness.date"

gen_output() {
  percent="$(brillo)"
  icon="${icons[$(awk -v n="$percent" 'BEGIN{print int(n/34)}')]}"

  echo '{"percent": "'"$percent"'", "icon": "'"$icon"'"}'
}

if [ "$1" = "osd" ]; then
  osd "$date"
else
  # initial
  last_time=$(get_time_ms)
  gen_output
  osd_handler "osd-brightness" &

  udevadm monitor | rg --line-buffered "backlight" | while read -r _; do
    current_time=$(get_time_ms)
    delta=$((current_time - last_time))
    if [[ $delta -gt 50 ]]; then
      gen_output
      # reset debounce timer
      last_time=$(get_time_ms)
    fi
  done
fi