#!/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-osd"
SERVICE_FILE="${NAME}.service"
CONFIG_FILE="/etc/modalai/${NAME}.conf"
USER=$(whoami)
PLATFORM=`/usr/bin/voxl-platform 2> /dev/null`


print_usage () {
	echo ""
	echo "Start wizard with prompts:"
	echo "voxl-configure-osd"
	echo ""
	echo "Shortcut configuration arguments for scripted setup."
	echo "factory_enable will reset the config file to factory defaults"
	echo "before enabling the service."
	echo ""
	echo ""
	echo "voxl-configure-osd disable"
	echo "voxl-configure-osd enable"
	echo "voxl-configure-osd factory_enable"
	echo "voxl-configure-osd factory_enable_no_compass"
	echo "voxl-configure-osd external_fc"
	echo "voxl-configure-osd hdzero"
	echo ""
	echo "show this help message:"
	echo "voxl-configure-osd 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 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}
}

## set bool parameters which need true/false in json
set_param_bool () {
	if [ "$#" != "2" ]; then
		echo "set_param_bool expected 2 args"
		exit 1
	fi

	var=$1
	var="${var%\"}"
	var="${var#\"}"
	val=$2
	val="${val%\"}"
	val="${val#\"}"

	if [ "$val" != "true" ] && [ "$val" != "false" ]; then
		echo "set_param_bool expected true or false"
		exit 1
	fi

	sed -E -i "/\"$var\":/c\	\"$var\":	$val," ${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}"
	exit 0
}

reset_config_file_to_default () {
	echo "wiping old config file"
	rm -rf ${CONFIG_FILE}
	# Only want to print the final configuration file contents
	if [ $# -gt 0 ]; then
		${NAME} -c > /dev/null 2>&1
	else 	
		${NAME} -c
	fi
}


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

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


## parse arguments
case $1 in
	"")
		echo "no argument given"
		print_usage
		exit 1
		;;
	"h"|"-h"|"help"|"--help")
		print_usage
		exit 0
		;;
	"enable")
		enable_service_and_exit
		;;
	"disable")
		disable_service_and_exit
		;;
	"factory_enable")
		reset_config_file_to_default
		enable_service_and_exit
		;;
	"factory_enable_no_compass")
		reset_config_file_to_default
		set_param_bool "show_compass_tape" false
		set_param_bool "show_compass_degrees" false
		enable_service_and_exit
		;;
	"external_fc")
		reset_config_file_to_default 1
		set_param "input_type" 2
		set_param "input_protocol" 2
		set_param "output_type" 1
		set_param_string "output_port" ""

		if [ "$PLATFORM" == "M0054" ] || [ "$PLATFORM" == "M0154" ]; then 
			set_param_string "input_port" "/dev/ttyHS1"
		elif [ "$PLATFORM" == "M0104" ] || [ "$PLATFORM" == "M0204" ]; then
			set_param_string "input_port" "/dev/ttyHS0"
		elif [ "$PLATFORM" == "M0197" ]; then
			set_param_string "input_port" "/dev/ttyHS7"
		else 
			echo "No default input port defined for $PLATFORM - defaulting to input port /dev/ttyHS1."
			set_param_string "input_port" "/dev/ttyHS1"
		fi
		${NAME} -c
		enable_service_and_exit
		;;
	"hdzero")
		reset_config_file_to_default 1
		set_param "output_type" 2
		if [ "$PLATFORM" == "M0054" ] || [ "$PLATFORM" == "M0154" ]; then 
			set_param_string "output_port" "/dev/ttyHS1"
		elif [ "$PLATFORM" == "M0104" ] || [ "$PLATFORM" == "M0204" ]; then
			set_param_string "output_port" "/dev/ttyHS0"
		else 
			echo "No default input port defined for $PLATFORM."
			set_param_string "output_port" ""
		fi
		enable_service_and_exit
		;;
	*)
		echo "invalid option"
		print_usage
		exit 1
esac



# should not get here
exit 1
