#!/bin/bash

#
# Try to setup Kit !
#

function scanWifi() {
	local iface=${1}
	iwinfo ${iface} scan
	return ${?}
}

function getWifiCell()
{
	local iface=${1}
	local ssidPrefix=${2}
	res=$(scanWifi ${iface} | grep -B 1 "ESSID: \"${ssidPrefix}")
	if [[ "${res}" == "Scanning not possible" ]] || [[ "${res}" == "" ]]
	then
		for try in $(seq 0 10)
		do
			sleep 5
			res=$(scanWifi ${iface} | grep -B 1 "ESSID: \"${ssidPrefix}")
			if [[ "${res}" == "Scanning not possible"  ]] || [[ "${res}" == ""  ]]
			then
				continue
			else
				echo ${res}
				return 0
			fi
		done
		echo "Error scanning wifi networks !"
		return 2
	else
		echo ${res}
		return 0
	fi
}

function connectWifi() {
	local iface=${1}
	local ssidPrefix=${2}
	local wpa=${3}

	local cell=$(getWifiCell ${iface} ${ssidPrefix})
	if [[ $? -ne 0 ]]
	then
		echo "Error on wifi scan !"
		exit 12
	fi
	local ssid=$(echo ${cell} | awk '{print $7}' | sed -e 's/"//g')
	local cellMAC=$(echo ${cell} | awk '{print $5}' | sed -e 's/"//g"')

	set -x
    uci delete wireless.@wifi-iface[1]
	uci add wireless wifi-iface
	uci set wireless.@wifi-iface[1].network="EmlidReach"
	uci set wireless.@wifi-iface[1].ssid="${ssid}"
	uci set wireless.@wifi-iface[1].encryption="psk2"
	uci set wireless.@wifi-iface[1].device="radio1"
	uci set wireless.@wifi-iface[1].mode="sta"
	uci set wireless.@wifi-iface[1].bssid="${cellMAC}"
	uci set wireless.@wifi-iface[1].key="${wpa}"
    uci commit
	reload_config
	sleep 20
	set +x
    udhcpc -i ${iface}
}

#           interface SSID_PREFIX Network_KEY
connectWifi "$1"         "$2"        "$3"