#!/usr/bin/env ash

# This script provides helper functions for blue-merle


UNICAST_MAC_GEN () {
    loc_mac_numgen=`python3 -c "import random; print(f'{random.randint(0,2**48) & 0b111111101111111111111111111111111111111111111111:0x}'.zfill(12))"`
    loc_mac_formatted=$(echo "$loc_mac_numgen" | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')
    echo "$loc_mac_formatted"
}

# randomize BSSID
RESET_BSSIDS () {
    uci set wireless.@wifi-iface[1].macaddr=`UNICAST_MAC_GEN`
    uci set wireless.@wifi-iface[0].macaddr=`UNICAST_MAC_GEN`
    uci commit wireless
    # you need to reset wifi for changes to apply, i.e. executing "wifi"
}


# This chaneges the MAC address clients see when connecting to the WiFi spawned by the device.
# You can check with "arp -a" that your endpoint, e.g. your laptop, sees a different MAC after a reboot of the Mudi.
RANDOMIZE_MACADDR () {
    uci set network.@device[1].macaddr=`UNICAST_MAC_GEN`
    uci commit network
    # You need to restart the network, i.e. /etc/init.d/network restart
}

READ_IMEI () {
	local answer=1
	while [[ "$answer" -eq 1 ]]; do
	        local imei=$(gl_modem AT AT+GSN | grep -w -E "[0-9]{14,15}")
	        if [[ $? -eq 1 ]]; then
                	echo -n "Failed to read IMEI. Try again? (Y/n): "
	                read answer
	                case $answer in
	                        n*) answer=0;;
	                        N*) answer=0;;
	                        *) answer=1;;
	                esac
	                if [[ $answer -eq 0 ]]; then
	                        exit 1
	                fi
	        else
	                answer=0
	        fi
	done
	echo $imei
}

READ_IMSI () {
	local answer=1
	while [[ "$answer" -eq 1 ]]; do
	        local imsi=$(gl_modem AT AT+CIMI | grep -w -E "[0-9]{6,15}")
	        if [[ $? -eq 1 ]]; then
                	echo -n "Failed to read IMSI. Try again? (Y/n): "
	                read answer
	                case $answer in
	                        n*) answer=0;;
	                        N*) answer=0;;
	                        *) answer=1;;
	                esac
	                if [[ $answer -eq 0 ]]; then
	                        exit 1
	                fi
	        else
	                answer=0
	        fi
	done
	echo $imsi
}


CHECK_ABORT () {
        sim_change_switch=`cat /tmp/sim_change_switch`
        if [[ "$sim_change_switch" = "off" ]]; then
                echo '{ "msg": "SIM change      aborted." }' > /dev/ttyS0
                sleep 1
                exit 1
        fi
}