#!/bin/bash

set -e

# Define the backlight device
BACKLIGHT_DEVICE="/sys/class/backlight/intel_backlight"
DECREMENT=300 # Adjust this to the value you want to increase

# Get the current and max brightness
current_brightness=$(cat "$BACKLIGHT_DEVICE/brightness")
max_brightness=$(cat "$BACKLIGHT_DEVICE/max_brightness")

# Calculate new brightness value
new_brightness=$((current_brightness - DECREMENT))

# Ensure it doesn't exceed the maximum brightness
if [ "$new_brightness" -gt "$max_brightness" ]; then
    new_brightness=$max_brightness
fi

# Set the new brightness
echo "$new_brightness" > "$BACKLIGHT_DEVICE/brightness"

notify-send "Brightness increased to $new_brightness"