brightness

#!/bin/bash

set -x

bright=$(cat /sys/class/backlight/intel_backlight/brightness)
max=$(cat /sys/class/backlight/intel_backlight/max_brightness)
level=
direction=
step=
param=1

#echo "$bright/$max"

#if [[ $# -eq 0 ]]; then
    #result=$(qalc "$bright / $max" | cut -f2 -d '=' | cut -f2 -d ' ')
    #echo $((100 * $bright / $max))
	#echo $bright
#else
if [[ $# -gt 0 ]]; then
    case ${!param} in
        up)
            level=1
	        param=$(($param + 1))
            ;;
        down)
            level=-1
	        param=$(($param + 1))
            ;;
        set)
            level=0
            param=$(($param + 1))
            #bright=${!param}
            ;;
        *)
            level=1
            ;;
    esac

    if [[ ${!param} > 0 ]]; then
        step=${!param}
    else
        step=.1
    fi
fi

case $BLOCK_BUTTON in
    1) # Left Click
        #level=0
        #step=1
        sudo ~/.config/i3/i3tools/brightness set 1
        ;;
    2) # Middle Click
        #level=0
        #step=.4
        sudo ~/.config/i3/i3tools/brightness set .4
        ;;
    3) # Right Click
        #level=0
        #step=.2
        sudo ~/.config/i3/i3tools/brightness set .2
        ;;
    4) # Wheel Up
        #level=1
        #step=.05
        sudo ~/.config/i3/i3tools/brightness up .05
        ;;
    5) # Wheel Down
        #level=-1
        #step=.05
        sudo ~/.config/i3/i3tools/brightness down .05
        ;;
    *)
        ;;
esac


if [[ -n $level ]]; then
    #step=$(qalc "$step * $max" | cut -f2 -d'=' | cut -f2 -d' ')
    step=$(echo "scale=0; ($step * $max) / 1" | bc)

    if [[ $level -eq 0 ]]; then
        bright=$step
    else
        #result=$(qalc "max(0, min(1, $bright + $level * $step))" | cut -f2 -d '=' | cut -f2 -d ' ')
        bright=$(qalc "round(max(0, min($max, ($level * $step) + $bright)))" | cut -f2 -d '=' | cut -f2 -d ' ')
    fi

    echo "|$level $step $bright $BLOCK_BUTTON|" >> /tmp/bright.log
    echo $bright | tee /sys/class/backlight/intel_backlight/brightness > /dev/zero
fi

#result=$(qalc "100 * $bright / $max" | cut -f2 -d'=' | cut -f2 -d' ')
result=$(echo "scale=0; (100 * $bright / $max) / 1" | bc)
echo $result"%"