#!/usr/bin/env bash
# Adjust backlight and emit current percentage to the wob overlay FIFO.
# Usage: wob-brightness.sh up|down

set -u

case "${1:-}" in
    up)   brightnessctl -e4 -n2 set 5%+ >/dev/null ;;
    down) brightnessctl -e4 -n2 set 5%- >/dev/null ;;
    *)    echo "usage: $0 up|down" >&2; exit 2 ;;
esac

fifo="${XDG_RUNTIME_DIR:-/tmp}/hypr-wob.${HYPRLAND_INSTANCE_SIGNATURE:-default}"
[[ -p "$fifo" ]] || exit 0
current=$(brightnessctl get)
max=$(brightnessctl max)
awk -v c="$current" -v m="$max" 'BEGIN { printf "%d\n", (c/m)*100 }' > "$fifo"