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

SCREEN_DEVICE="amdgpu_bl1"

STATE_DIR="${XDG_RUNTIME_DIR:-/tmp}/hypridle"
SCREEN_STATE_FILE="$STATE_DIR/screen"

mkdir -p "$STATE_DIR"

save_current() {
  brightnessctl -d "$SCREEN_DEVICE" g >"$SCREEN_STATE_FILE"
}

dim() {
  save_current
  brightnessctl -d "$SCREEN_DEVICE" set 10%
}

restore() {
  [[ -f "$SCREEN_STATE_FILE" ]] && brightnessctl -d "$SCREEN_DEVICE" s "$(cat "$SCREEN_STATE_FILE")"
}

case "${1:-}" in
dim)
  dim
  ;;
restore)
  restore
  ;;
*)
  echo "Usage: $0 {dim|restore}"
  exit 1
  ;;
esac