#!/usr/bin/env bash
set -euo pipefail

# Dim/restore brightness for hypridle.
# Uses brightnessctl on laptops (sysfs backlight) or ddcutil on external monitors.
#
# Usage:
#   brightness-dim <value>   # Set brightness to value (0-100)
#   brightness-dim restore  # Restore previous brightness

case "${1:-}" in
    restore)
        if [ -d /sys/class/backlight ] && [ -n "$(ls -A /sys/class/backlight 2>/dev/null)" ]; then
            brightnessctl -r
        else
            ddcutil setvcp 10 100
        fi
        ;;
    *)
        if [ -d /sys/class/backlight ] && [ -n "$(ls -A /sys/class/backlight 2>/dev/null)" ]; then
            brightnessctl -s set "${1}%"
        else
            ddcutil setvcp 10 "${1}"
        fi
        ;;
esac