#!/bin/sh

dpi_to_hex()
{
	case $2 in
	40) eval $1=00;;
	80) eval $1=01;;
	120) eval $1=02;;
	160) eval $1=03;;
	200) eval $1=04;;
	240) eval $1=05;;
	280) eval $1=06;;
	320) eval $1=07;;
	360) eval $1=08;;
	400) eval $1=09;;
	440) eval $1=0a;;
	480) eval $1=0b;;
	520) eval $1=0c;;
	560) eval $1=0d;;
	600) eval $1=0e;;
	640) eval $1=0f;;
	680) eval $1=10;;
	720) eval $1=11;;
	760) eval $1=12;;
	800) eval $1=13;;
	840) eval $1=14;;
	880) eval $1=15;;
	920) eval $1=16;;
	960) eval $1=17;;
	1000) eval $1=18;;
	1040) eval $1=19;;
	1080) eval $1=1a;;
	1160) eval $1=1b;;
	1200) eval $1=1c;;
	1240) eval $1=1d;;
	1280) eval $1=1e;;
	1320) eval $1=1f;;
	1360) eval $1=20;;
	1400) eval $1=21;;
	1440) eval $1=22;;
	1480) eval $1=23;;
	1520) eval $1=24;;
	1560) eval $1=25;;
	1600) eval $1=26;;
#... can do way more
	*)
		printf "\nERROR:invalid dpi (40-1600/40 increment)\n"
		exit 1
		;;
	esac
}

effect_to_hex()
{
	case $effect in
	steady) effect=01;;
	slow) effect=02;;
	breath) effect=03;;
	pulsing) effect=04;;
	*)
		printf "\nERROR:invalid effect (steady|slow|breath|pulsing)\n"
		exit 1
		;;
	esac
}

# not implemented, because factory default value is ok
# set polling rate in Hz:
# command=04 00
# suffix=00 00 00 00 00 00
# values=
#	125 Hz=04
#	250 Hz=03
#	500 Hz=02
#	1000 Hz=02 (factory default)
#
# not implemented, because no use for it
# button 6 (wheel button) action:
# command=0b
# suffix=00 00 00 00 00 00 00
# values=
#       default=00
# 	os=01

USAGE="Usage: $0 -c color(hex 3 bytes rrggbb) -s1 dpi1(200-7200/100 increment) -s2 dpi2(100-7200/100 increment) -e effect(steady|slow|breath|pulsing) -s"
if test $# -eq 0; then
	echo $USAGE
	exit 0
fi

# vendor_id=0x1038
# product_id=0x1729
for l in /sys/class/hidraw/*; do
	if readlink -f $l | egrep '1038:1729' >/dev/null 2>&1; then
		rival110=/dev/$(basename $l)
		break
	fi
done

if test "${rival110-unset}" = unset; then
	echo ERROR:unable to locate a rival110
	exit 1
else
	echo $rival110
fi

while test $# -ne 0; do
	case $1 in
		-c)
			if test "$2" = ""; then
				echo missing rgb_hex
				exit 1
			fi
			rgb_hex=$2
			shift 2
			;;
		-s1)
			if test "$2" = ""; then
				echo missing sensitivity 1
				exit 1
			fi
			sensitivity_1=$2
			shift 2
			;;
		-s2)
			if test "$2" = ""; then
				echo missing sensitivity 2
				exit 1
			fi
			sensitivity_2=$2
			shift 2
			;;
		-e)
			if test "$2" = ""; then
				echo missing effect
				exit 1
			fi
			effect=$2
			shift 2
			;;
		-s)
			save=yes
			shift
			;;
		*)
			echo ignoring $1
			shift
			;;
	esac
done

# each command is padded to 9 bytes
if test "${rgb_hex-unset}" != unset; then
	echo "rgb_hex=$rgb_hex";
	cmd_hex=0500${rgb_hex}00000000
fi
if test "${sensitivity_1-unset}" != unset; then
	printf "sensitivity_1=$sensitivity_1 dpi"
	dpi_to_hex sensitivity_1 $sensitivity_1
	echo "/hexcode=$sensitivity_1"
	cmd_hex=${cmd_hex}0301${sensitivity_1}000000000000
fi
if test "${sensitivity_2-unset}" != unset; then
	printf "sensitivity_2=$sensitivity_2 dpi"
	dpi_to_hex sensitivity_2 $sensitivity_2
	echo "/hexcode=$sensitivity_2"
	cmd_hex=${cmd_hex}0302${sensitivity_2}000000000000
fi
if test "${effect-unset}" != unset; then
	printf "effect=$effect"
	effect_to_hex
	echo "/hexcode=$effect"
	cmd_hex=${cmd_hex}0700${effect}000000000000
fi
# must be last for an obvious reason
if test "${save-unset}" != unset; then
	echo "****will save settings in mouse persistent memory****"
	cmd_hex=${cmd_hex}090000000000000000
fi
printf $cmd_hex | xxd -r -p >$rival110