#!/bin/sh

CFG=/etc/board.json

. /usr/share/libubox/jshn.sh

[ -f $CFG ] || exit 1

generate_static_network() {
	uci -q batch <<-EOF
		delete network.loopback
		set network.loopback='interface'
		set network.loopback.ifname='lo'
		set network.loopback.proto='static'
		set network.loopback.ipaddr='127.0.0.1'
		set network.loopback.netmask='255.0.0.0'
		delete network.globals
		set network.globals='globals'
		set network.globals.ula_prefix='auto'
	EOF
}

addr_offset=2
generate_network() {
	local ifname macaddr protocol type

	json_select network
		json_select "$1"
			json_get_vars ifname macaddr protocol
		json_select ..
	json_select ..

	[ -n "$ifname" ] || return

	# force bridge for multi-interface devices (and lan)
	case "$1:$ifname" in
		*\ * | lan:*) type="bridge" ;;
	esac

	uci -q batch <<-EOF
		delete network.$1
		set network.$1='interface'
		set network.$1.type='$type'
		set network.$1.ifname='$ifname'
		set network.$1.proto='none'
		set network.$1.macaddr='$macaddr'
	EOF

	case "$protocol" in
		static)
			local ipaddr
			case "$1" in
				lan) ipaddr="192.168.1.1" ;;
				*) ipaddr="192.168.$((addr_offset++)).1" ;;
			esac

			uci -q batch <<-EOF
				set network.$1.proto='static'
				set network.$1.ipaddr='$ipaddr'
				set network.$1.netmask='255.255.255.0'
				set network.$1.ip6assign='60'
			EOF
		;;

		dhcp)
			# fixup IPv6 slave interface if parent is a bridge
			[ "$type" = "bridge" ] && ifname="br-$1"

			uci -q batch <<-EOF
				set network.$1.proto='dhcp'
				delete network.${1}6
				set network.${1}6='interface'
				set network.${1}6.ifname='$ifname'
				set network.${1}6.proto='dhcpv6'
			EOF
		;;
	esac
}

generate_switch_vlans_ports() {
	local switch="$1"
	local port ports role roles num attr val

	#
	# autogenerate vlans
	#

	json_get_keys roles roles
	json_select roles

	for role in $roles; do
		json_select "$role"
			json_get_vars ports
		json_select ..

		uci -q batch <<-EOF
			add network switch_vlan
			set network.@switch_vlan[-1].device='$switch'
			set network.@switch_vlan[-1].vlan='$role'
			set network.@switch_vlan[-1].ports='$ports'
		EOF
	done

	json_select ..


	#
	# write port specific settings
	#

	json_get_keys ports ports
	json_select ports

	for port in $ports; do
		json_select "$port"
			json_get_vars num

			if json_is_a attr object; then
				json_get_keys attr attr
				json_select attr
					uci -q batch <<-EOF
						add network switch_port
						set network.@switch_port[-1].device='$switch'
						set network.@switch_port[-1].port=$num
					EOF

					for attr in $attr; do
						json_get_var val "$attr"
						uci -q set network.@switch_port[-1].$attr="$val"
					done
				json_select ..
			fi
		json_select ..
	done

	json_select ..
}

generate_switch() {
	local key="$1"
	local vlans

	json_select switch
	json_select "$key"
	json_get_vars enable reset blinkrate cpu_port

	uci -q batch <<-EOF
		add network switch
		set network.@switch[-1].name='$key'
		set network.@switch[-1].reset='$reset'
		set network.@switch[-1].enable_vlan='$enable'
		set network.@switch[-1].blinkrate='$blinkrate'
	EOF

	generate_switch_vlans_ports "$1"

	json_select ..
	json_select ..
}

generate_rssimon() {
	local key="$1"
	local cfg="rssid_$key"
	local refresh threshold

	json_select rssimon
	json_select "$key"
	json_get_vars refresh threshold
	json_select ..
	json_select ..

	uci -q batch <<-EOF
		delete system.$cfg
		set system.$cfg='rssid'
		set system.$cfg.dev='$key'
		set system.$cfg.refresh='$refresh'
		set system.$cfg.threshold='$threshold'
	EOF
}

generate_led() {
	local key="$1"
	local cfg="led_$key"

	json_select led
	json_select "$key"
	json_get_vars name sysfs type trigger default

	uci -q batch <<-EOF
		delete system.$cfg
		set system.$cfg='led'
		set system.$cfg.name='$name'
		set system.$cfg.sysfs='$sysfs'
		set system.$cfg.trigger='$trigger'
		set system.$cfg.default='$default'
	EOF

	case "$type" in
		gpio)
			local gpio inverted
			json_get_vars gpio inverted
			uci -q batch <<-EOF
				set system.$cfg.trigger='gpio'
				set system.$cfg.gpio='$gpio'
				set system.$cfg.inverted='$inverted'
			EOF
		;;

		netdev)
			local device
			json_get_vars device
			uci -q batch <<-EOF
				set system.$cfg.trigger='netdev'
				set system.$cfg.mode='link tx rx'
				set system.$cfg.dev='$device'
			EOF
		;;

		usb)
			local device
			json_get_vars device
			uci -q batch <<-EOF
				set system.$cfg.trigger='usbdev'
				set system.$cfg.interval='50'
				set system.$cfg.dev='$device'
			EOF
		;;

		rssi)
			local iface minq maxq offset factor
			json_get_vars iface minq maxq offset factor
			uci -q batch <<-EOF
				set system.$cfg.trigger='rssi'
				set system.$cfg.iface='rssid_$iface'
				set system.$cfg.minq='$minq'
				set system.$cfg.maxq='$maxq'
				set system.$cfg.offset='$offset'
				set system.$cfg.factor='$factor'
			EOF
		;;

		switch)
			local port_mask
			json_get_vars port_mask
			uci -q batch <<-EOF
				set system.$cfg.port_mask='$port_mask'
			EOF
		;;

		timer)
			local delayon delayoff
			json_get_vars delayon delayoff
			uci -q batch <<-EOF
				set system.$cfg.trigger='timer'
				set system.$cfg.delayon='$delayon'
				set system.$cfg.delayoff='$delayoff'
			EOF
		;;
	esac

	json_select ..
	json_select ..
}

json_init
json_load "$(cat ${CFG})"

generate_static_network

json_get_keys keys network
for key in $keys; do generate_network $key; done

json_get_keys keys switch
for key in $keys; do generate_switch $key; done

json_get_keys keys rssimon
for key in $keys; do generate_rssimon $key; done

json_get_keys keys led
for key in $keys; do generate_led $key; done

uci commit