#!/bin/sh
wfb_soc=$(ipcinfo -c)
wfb_key=/etc/drone.key
wfb_dev=wlan0

wfb_yaml() {
	if [ -e "$1" ]; then
		while IFS=": " read -r key value; do
			[ -n "$value" ] && export "$key=$value"
		done < "$1"
	fi
}

load_config() {
	wfb_yaml /rom/etc/wfb.yaml
	wfb_yaml /etc/wfb.yaml

	if [ ! -e "$wfb_key" ]; then
		wfb_key=/rom/etc/drone.key
	fi
}

load_modules() {
	for card in $(lsusb | awk '{print $6}' | sort | uniq); do
		case "$card" in
			"0bda:8812" | "0bda:881a" | "0b05:17d2" | "2357:0101" | "2604:0012")
				driver=88XXau
				modprobe "$driver"
				;;

			"0bda:a81a")
				driver=8812eu
				modprobe "$driver" rtw_regd_src=1 rtw_tx_pwr_by_rate=0 rtw_tx_pwr_lmt_enable=0
				;;

			"0bda:f72b" | "0bda:b733")
				driver=8733bu
				modprobe "$driver" rtw_regd_src=1 rtw_tx_pwr_by_rate=0 rtw_tx_pwr_lmt_enable=0
				;;
		esac
	done

	if [ -z "$driver" ]; then
		echo "- Wireless module not detected!"
		exit 1
	else
		echo "- Detected driver: $driver"
	fi

	if ! ifconfig "$wfb_dev" up; then
		echo "- Wireless driver not found!"
		exit 1
	fi
}

load_interface() {
	iw "$wfb_dev" set monitor none
	iw "$wfb_dev" set channel "$channel" "$mode"
	iw reg set "$region"

	if [ "$driver" = "88XXau" ]; then
		iw "$wfb_dev" set txpower fixed $((txpower * -100))
	else
		iw "$wfb_dev" set txpower fixed $((txpower * 50))
	fi

	case "$mode" in
		"HT20")
			bandwidth=20
			;;
		"HT40+" | "HT40-")
			bandwidth=40
			;;
	esac
}

start_broadcast() {
	echo "- Starting wfb_tx"
	wfb_tx -K "$wfb_key" -M "$wfb_index" -B "$bandwidth" -C 8000 \
		-k "$fec_k" -n "$fec_n" -i "$link_id" "$wfb_dev" &> /dev/null &
}

start_tunnel() {
	echo "- Starting wfb_tun"
	wfb_rx -p 160 -u 5800 -K "$wfb_key" -i "$link_id" "$wfb_dev" &> /dev/null &
	wfb_tx -p 32 -u 5801 -K "$wfb_key" -M "$tun_index" \
		-k "$fec_k" -n "$fec_n" -i "$link_id" "$wfb_dev" &> /dev/null &
	wfb_tun -a 10.5.0.10/24 > /dev/null &
}

start_telemetry() {
	if [ "$wfb_soc" = "ssc33x" ]; then
		devmem 0x1F207890 16 0x8
	fi

	if [ "$router" = "msposd" ]; then
		echo "- Starting $router"
		size=$(curl -s localhost/api/v1/config.json | jsonfilter -e "@.video0.size")
		msposd --baudrate 115200 --channels 8 --ahi 0 -osd -r "$osd_fps" \
			--master "$serial" --out 10.5.0.1:14551 --size "${size:-1280x720}" > /dev/null &
	elif [ "$router" = "mavfwd" ]; then
		echo "- Starting $router"
		mavfwd --baudrate 115200 --channels 8 -p 100 -a 15 -t \
			--master "$serial" --in 0.0.0.0:14550 --out 10.5.0.1:14551 > /dev/null &
	fi
}

majestic_sigmastar() {
	if [ "$(ipcinfo -s)" = "imx415" ]; then
		cli -s .isp.sensorConfig /etc/sensors/imx415_fpv.bin
	fi
	cli -s .isp.exposure 5
	cli -s .video0.codec h265
	cli -s .video0.fps 60
	cli -s .video0.rcMode cbr
	cli -s .outgoing.enabled true
	cli -s .outgoing.server udp://0.0.0.0:5600
}

start() {
	load_config
	load_modules
	load_interface

	start_broadcast
	start_tunnel
	start_telemetry

	if [ ! -e /etc/system.ok ]; then
		if [ "$wfb_soc" = "ssc33x" ]; then
			majestic_sigmastar
		fi

		touch /etc/system.ok
		killall -1 majestic
	fi
}

stop() {
	killall -q wfb_rx
	killall -q wfb_tx
	killall -q wfb_tun
	killall -q msposd
	killall -q mavfwd
}

case "$1" in
	start|stop)
		$1
		;;

	restart|reload)
		stop
		start
		;;

	*)
		echo "Usage: $0 {start|stop|restart|reload}"
		exit 1
		;;
esac