#!/bin/sh
###########################################################################
#
# Copyright (c) 2021-2023 Diality Inc. - All Rights Reserved.
#
# THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
# WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
#
# @file    brightness_get.sh
#
# @author  (last)      Behrouz NematiPour
# @date    (last)      15-Jan-2025
# @author  (original)  Behrouz NematiPour
# @date    (original)  15-Jan-2025
#
############################################################################

# sources
. ./_errors_
. ./_functions_
. ./_variables_

# local variables
# either set or get a parameter always has to be given.
PARAM_COUNT=1
BRIGHTNESS_VALUE="$(trim "$1")"

# local functions

# checks
check_param_count  "$#" "$PARAM_COUNT"
check_file_exists "$BRIGHTNESS_SYSFS" "$BRIGHTNESS_SYSFS"

# main
# if a value is give update the brightness
if [ "$BRIGHTNESS_VALUE" != "" ]; then
    echo "$BRIGHTNESS_VALUE" > "$BRIGHTNESS_SYSFS"
    check_result "$?" "$ERR_CMDFAIL_BRIGHTNESS_SET"
fi

# return the current/updated brightness
BRIGHTNESS_VALUE="$(cat $BRIGHTNESS_SYSFS)"
check_result "$?" "$ERR_CMDFAIL_BRIGHTNESS_GET"

sleep 0.1
echo $BRIGHTNESS_VALUE
exit 0