#!/bin/sh

. /usr/share/libubox/jshn.sh
. /lib/functions.sh

get_if_creds() {
	local section=$1
	local network=$2
	local net dev ssid key encryption band
	config_get net $section "network" "lan"
	if [ "$net" == "$network" ]; then
		config_get dev $section "device"
		band="$(uci -q get wireless.$dev.band)"
		config_get ssid $section ssid
		config_get key $section key
		config_get encryption $section encryption
		config_get disabled $section disabled 0
		[ $disabled -eq 1 ] && return
		[ "$ssid" == "" -o "$band" == "" ] && return
		json_add_object
		json_add_string "ssid" "$ssid"
		json_add_string "band" "$band"
		json_add_string "key" "$key"
		json_add_string "encryption" "$encryption"
		json_close_object
	fi
}

validate_file() {
	local file="$1"
	local real="$(readlink -f `dirname $file`)"
	real="${real}/`basename $file`"
	case "$real" in
		/tmp/*)
			touch $real && return 0 || return 1
		;;
		*)
			return 1
		;;
	esac
}

write_error(){
	json_init
	json_add_string "status" "error: $1"
	json_dump
	exit 1
}

duplicate_if_single_radio() {
	json_select "wifi-ifaces"
	local i=1
	local dummy band dup_band num_radios

	num_radios="$(uci -q show wireless | grep wifi-device | wc -l)"

	[ "$num_radios" == "2" ] && return

	band="$(uci -q get wireless.@wifi-device[0].band)"

	[ "$band" == "a" ] && dup_band="b"
	[ "$band" == "b" ] && dup_band="a"
	[ -z "$dup_band" ] && return


	while json_get_var dummy $i; do
		i=$((i+1))
	done
	i=$((i-1))
	local ssid key encryption
	while [ $i -gt 0 ]; do
		json_select $i
		json_get_var ssid ssid
		json_get_var key key
		json_get_var encryption encryption
		json_select ..
		json_add_object
		json_add_string "ssid" "$ssid"
		json_add_string "band" "$dup_band"
		json_add_string "key" "$key"
		json_add_string "encryption" "$encryption"
		json_close_object
		i=$((i-1))
	done
}

case "$1" in
	list)
		echo '{ "get_creds": { "network": "str", "file": "str" }, "set_creds": { "file": "str", "from_gui": "str" } }'
	;;
	call)
		case "$2" in
			get_creds)
				#TODO: if not routed exit
				local curmode="$(uci -q get netmode.setup.curmode)"
				case $curmode in
					*repeater*) write_error "not in repeater mode";;
				esac
				local network file input
				read input
				json_load $input
				json_get_var network network
				json_get_var file file

				json_init
				json_add_array "wifi-ifaces"
				config_load wireless
				config_foreach get_if_creds "wifi-iface" "$network"
				json_close_array

				duplicate_if_single_radio

				if [ "$file" == "" ]; then
					json_dump
				else
					validate_file $file && json_dump -i >$file || write_error "invalid filename (\"$file\"), file must be in /tmp/ and in an existing directory"
				fi
				json_init
				json_add_string "status" success
				json_dump
			;;
			set_creds)
				local file from_gui
				read input
				json_load "$input"
				json_get_var file file
				json_get_var from_gui from_gui
				validate_file "$file" || write_error "invalid filename (\"$file\"), file must be in /tmp and exist"
				json_load "`cat $file`" || write_error "invalid file content"
				json_select "wifi_ifaces" || write_error "invalid file content"

				start-netmode-conf "$file" "$from_gui" >/dev/null 2>/dev/null

				json_init
				json_add_string "status" success
				json_dump

			;;
		esac
	;;
esac