#!/bin/bash
################################################################################
# Copyright 2024 ModalAI Inc.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# 4. The Software is used solely in conjunction with devices provided by
#    ModalAI Inc.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
################################################################################

NAME="voxl-lepton-server"
SERVICE_FILE="${NAME}.service"
CONFIG_FILE="/etc/modalai/${NAME}.conf"
USER=$(whoami)


print_usage () {
	echo ""
	echo "Usage:"
	echo "voxl-configure-lepton {MODE}"
	echo ""
	echo "Valid Modes are:"
	echo ""
	echo "disable               disable the service"
	echo "VOXL2_J10             configure for SPI-only connection on VOXL2 J10"
	echo "m0130                 configure for SPI+I2C connection on M0130 (VOXL2 only)"
	echo "m0130_flow            M0130 on VOXL2 with flow shutter mode"
	echo "m0130_manual          M0130 on VOXL2 with manual shutter mode"
	echo "m0173                 configure for SPI+I2C connection on M0173"
	echo "m0173_manual          like above but with manual shutter"
	echo "m0173_rotated         like above but rotated image for Starling 2"
	echo "m0173_rotated_manual  like above but with manual shutter"
	echo "m0188                 configure for I2C connection on M0188"
	echo "m0197                 configure for I2C connection on M0197"
	echo "m0197_flow            configure for I2C connection on M0197 in flow shutter mode"
	echo "m0197_manual          configure for I2C connection on M0197 in manual shutter mode"
	echo "enable                enable the service, leave config file alone"
	echo ""
	echo ""
	echo "show this help message:"
	echo "voxl-configure-lepton help"
	echo ""
	exit 0
}


## set most parameters which don't have quotes in json
set_param () {
	if [ "$#" != "2" ]; then
		echo "set_param expected 2 args"
		exit 1
	fi

	# remove quotes if they exist
	var=$1
	var="${var%\"}"
	var="${var#\"}"
	val=$2
	val="${val%\"}"
	val="${val#\"}"

	sed -E -i "/\"$var\":/c\	\"$var\":	$val," ${CONFIG_FILE}
}

set_param_last () {
	if [ "$#" != "2" ]; then
		echo "set_param expected 2 args"
		exit 1
	fi

	# remove quotes if they exist
	var=$1
	var="${var%\"}"
	var="${var#\"}"
	val=$2
	val="${val%\"}"
	val="${val#\"}"

	sed -E -i "/\"$var\":/c\	\"$var\":	$val" ${CONFIG_FILE}
}

## set string parameters which need quotes in json
set_param_string () {
	if [ "$#" != "2" ]; then
		echo "set_param_string expected 2 args"
		exit 1
	fi
	var=$1
	var="${var%\"}"
	var="${var#\"}"
	sed -E -i "/\"$var\":/c\	\"$var\":	\"$2\"," ${CONFIG_FILE}
}


disable_service_and_exit () {
	echo "disabling ${NAME} systemd service"
	systemctl disable ${SERVICE_FILE}
	echo "stopping ${NAME} systemd service"
	systemctl stop ${SERVICE_FILE}
	echo "Done configuring ${NAME}"
	exit 0
}

enable_service_and_exit () {
	echo "enabling  ${NAME} systemd service"
	systemctl enable  ${SERVICE_FILE}
	echo "Done configuring ${NAME}"
	echo "Service will start on next reboot"
	exit 0
}

reset_config_file_to_default () {
	echo "wiping old config file"
	rm -rf ${CONFIG_FILE}
	${NAME} -c
}


################################################################################
## actual start of execution, handle optional arguments first
################################################################################

## sanity checks
if [ "${USER}" != "root" ]; then
	echo "Please run this script as root"
	exit 1
fi

## convert argument to lower case for robustness
arg=$(echo "$1" | tr '[:upper:]' '[:lower:]')

## parse arguments
case ${arg} in
	"")
		print_usage
		exit 0
		;;

	"h"|"-h"|"help"|"--help")
		print_usage
		exit 0
		;;

	"disable")
		disable_service_and_exit
		;;

	"VOXL2_J10"|"factory_enable")
		echo "configuring defaults"
		reset_config_file_to_default
		enable_service_and_exit
		;;

	"m0141"|"M0141"|"factory_enable_m0141")
		echo "configuring for VOXL2 with M0141"
		echo "note this requires a system image newer than Dec 1, 2023"
		reset_config_file_to_default
		set_param spi_bus 14
		set_param i2c_bus 1
		set_param en_i2c true
		enable_service_and_exit
		;;

	"m0130"|"M0130"|"m130"|"factory_enable_m0130")
		echo "configuring for VOXL2 with M0130"
		reset_config_file_to_default
		set_param spi_bus 11
		set_param i2c_bus 0
		set_param en_i2c true
		enable_service_and_exit
		;;

	"m0130_flow"|"M130_flow"|"factory_enable_m0130_flow")
		echo "configuring for VOXL2 with M0130 and flow mode"
		reset_config_file_to_default
		set_param spi_bus 11
		set_param i2c_bus 0
		set_param en_i2c true
		set_param_string shutter_mode flow
		enable_service_and_exit
		;;

	"m0130_manual"|"m130_manual"|"factory_enable_m0130_manual")
		echo "configuring for VOXL2 with M0130 and manual mode"
		reset_config_file_to_default
		set_param spi_bus 11
		set_param i2c_bus 0
		set_param en_i2c true
		set_param_string shutter_mode manual
		enable_service_and_exit
		;;

	"m0173"|"M0173"|"m173"|"factory_enable_m0173")
		echo "configuring for VOXL2 with M0173"
		reset_config_file_to_default
		set_param spi_bus 0
		set_param i2c_bus 4
		set_param en_i2c true
		enable_service_and_exit
		;;
	
	"m0173_manual")
		echo "configuring for VOXL2 with M0173"
		reset_config_file_to_default
		set_param spi_bus 0
		set_param i2c_bus 4
		set_param en_i2c true
		set_param_string shutter_mode manual
		enable_service_and_exit
		;;

	"m0173_rotated"|"M0173_rotated"|"m173_rotated"|"factory_enable_m0173_rotated")
		echo "configuring for VOXL2 with M0173"
		reset_config_file_to_default
		set_param spi_bus 0
		set_param i2c_bus 4
		set_param en_i2c true
		set_param en_rotate true
		enable_service_and_exit
		;;
	
	"m0173_rotated_manual"|"M0173_rotated_manual"|"m173_rotated_manual"|"factory_enable_m0173_rotated_manual")
		echo "configuring for VOXL2 with M0173"
		reset_config_file_to_default
		set_param spi_bus 0
		set_param i2c_bus 4
		set_param en_i2c true
		set_param_string shutter_mode manual
		set_param en_rotate true
		enable_service_and_exit
		;;

	"m0188"|"M0188"|"m188"|"factory_enable_m0188")
		echo "configuring for VOXL2 Mini with M0188"
		reset_config_file_to_default
		set_param spi_bus 0
		set_param i2c_bus 0
		set_param en_i2c true
		set_param_string shutter_mode manual
		set_param en_rotate true
		enable_service_and_exit
		;;

	"m0197"|"M0197"|"m197"|"factory_enable_m0197")
		echo "configuring for VOXL3 FPV with M0197"
		reset_config_file_to_default
		set_param spi_bus 14
		set_param i2c_bus 13
		set_param en_i2c true
		set_param_string shutter_mode auto
		enable_service_and_exit
		;;

	"m0197_rotated")
		echo "configuring for VOXL3 FPV with M0197"
		reset_config_file_to_default
		set_param spi_bus 14
		set_param i2c_bus 13
		set_param en_i2c true
		set_param_string shutter_mode auto
		set_param en_rotate true
		enable_service_and_exit
		;;

	"m0197_flow_rotated"|"M0197_flow_rotated")
		echo "configuring for VOXL3 FPV with M0197 and flow mode"
		reset_config_file_to_default
		set_param spi_bus 14
		set_param i2c_bus 13
		set_param en_i2c true
		set_param_string shutter_mode flow
		set_param en_rotate true
		enable_service_and_exit
		;;

	"m0197_manual_rotated"|"M0197_manual_rotated")
		echo "configuring for VOXL3 FPV with M0197 and manual mode"
		reset_config_file_to_default
		set_param spi_bus 14
		set_param i2c_bus 13
		set_param en_i2c true
		set_param_string shutter_mode manual
		set_param en_rotate true
		enable_service_and_exit
		;;

	"enable")
		enable_service_and_exit
		;;
	*)
		echo "invalid option"
		print_usage
		exit 1
esac



################################################################################
## no option given, print help
################################################################################
print_usage


