#!/bin/sh

. /lib/blue-merle/functions.sh

if [ ! -c "/dev/ttyUSB3" ]; then
	e750-mcu "Error:          /dev/ttyUSB3    does not exist."
	sleep 3
	e750-mcu "Please reboot & contact maintainer if problem   persists."
	exit 1;
fi

if [ ! -f "/tmp/sim_change_start" ]; then
	echo 0 > /tmp/sim_change_start
fi

if [ ! -f "/tmp/sim_change_switch" ]; then
	sim_switch off
fi

now=$(date +%s)
sim_change_last=`cat /tmp/sim_change_start`
sim_change_diff=$((now-sim_change_last))

if [[ "$sim_change_diff" -lt 60  ]]; then
	e750-mcu "Please wait     >1min between   two SIM swaps.  ($sim_change_diff s)"
	exit 1
fi

echo "$now" > /tmp/sim_change_start

e750-mcu "Starting SIM    swap."
sleep 3

i=5
until  [[ $i -lt 0 ]]
do
	e750-mcu "Pull switch to  abort ($i).     "
	i=$((i-1))
	sleep 1

	CHECK_ABORT
done

e750-mcu "Continuing ..."
sleep 1

e750-mcu "Disabling the MEfrom transmit-  ting and recei- ving RF signals."
sleep 3

old_imei=$(READ_IMEI)
old_imsi=$(READ_IMSI)

CHECK_ABORT

answer=1
while [[ "$answer" -eq 1 ]]; do
	gl_modem AT AT+CFUN=4 | grep -q OK
	if [[ $? -eq 1 ]]; then
		e750-mcu "Disabling failed. Trying again."
		CHECK_ABORT
	else
		answer=0
		e750-mcu "Disabled."
		sleep 2
	fi
done

e750-mcu "Replace the SIM card. Then pull the switch."

while [[ `cat /tmp/sim_change_switch` = "on" ]]; do	
	e750-mcu "Replace the SIM card. Then pull the switch."
	sleep 3
done

e750-mcu "Switch pulled.  Continuing..."
sleep 1
sim_switch on

leak=0

until gl_modem AT AT+CFUN=0 | grep -q OK
do
	e750-mcu "CFUN=0 failed. Trying again."
	sleep 1
done

until gl_modem AT AT+CFUN=4 | grep -q OK
do
	leak=1
	e750-mcu "CFUN=4 failed. Trying again."
	sleep 1
done

if [[ $leak -eq 1 ]]; then
	e750-mcu "WARNING:        Reset took longer than expected."
	sleep 3
fi

sleep 1

new_imsi=$(READ_IMSI)

if [[ "$old_imsi" == "$new_imsi" ]]; then
	e750-mcu "WARNING:        Old IMSI equals new IMSI."
	sleep 3
fi

e750-mcu "Setting random  IMEI"
python3 /lib/blue-merle/imei_generate.py -r

new_imei=$(READ_IMEI)

if [[ "$old_imei" == "$new_imei" ]]; then
	e750-mcu "WARNING:        Old IMEI equals new IMEI."
	sleep 3
else
	mkdir -p /tmp/modem.1-1.2
	echo "$new_imei" > /tmp/modem.1-1.2/modem-imei
fi


e750-mcu "The device will shutdown now."
sleep 3
e750-mcu "You should      change your     location before booting again."
sleep 5 


i=5
until  [[ $i -eq 0 ]]
do
        i=$((i-1))
        e750-mcu "Shutting down... ($i)"
        sleep 1
done

echo {\"poweroff\": \"1\"} >/tmp/mcu_message && sleep 0.5 && killall -17 e750-mcu

exit 0