,brightness

#!/usr/bin/env bash
if ! (type xbacklight >/dev/null); then
	notify-send -u critical 'xbacklight command not found. Run `sudo apt install xbacklight`'
	exit 2
fi

intel_backlight="/sys/class/backlight/intel_backlight"
if ! [[ -d "$intel_backlight" ]]; then
	notify-send -u critical "intel_backlight not found"
	exit 2
fi

# Increase/descrease brightness
if [[ "$1" == "up" ]]; then
	xbacklight -inc 10
elif [[ "$1" == "down" ]]; then
	xbacklight -dec 10
fi

# Popup notification for brightness
brightness="$(xbacklight -get 2>&1)"
if (($?)); then
	# Example:
	# https://askubuntu.com/questions/715306/xbacklight-no-outputs-have-backlight-property-no-sys-class-backlight-folder
	# sudo find /sys/ -type f -iname '*brightness*'
	# sudo ln -s /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight  /sys/class/backlight
	notify-send -u critical "xbacklight: $brightness"
	# TODO: Check for this file: /etc/X11/xorg.conf
	# https://askubuntu.com/questions/715306/xbacklight-no-outputs-have-backlight-property-no-sys-class-backlight-folder
	exit 2
fi

# If the screen turns completely off, set birghtness to 1%
if (("${brightness%%.*}" == 0)); then
	xbacklight -set 1
fi

# Display brightness notification
brightness_icon="🔆"
bar_color="#6090b0"
dunstify \
	--timeout=1000 \
	--replace=2593 \
	--urgency=normal \
	"$brightness_icon $brightness%" \
	--hints="int:value:$brightness" \
	--hints="string:hlcolor:$bar_color"
exit

# Use notify-send to print brightness
notify-send \
	-t 400 \
	-u normal \
	-h string:x-canonical-private-synchronous:brightness \
	"Brightness: ${brightness%%.*}%"