#!/bin/bash

source functions.sh
source configs.sh

# Pinout for cellulariot app shield
STATUS=23
POWERKEY=24
DISABLE=17

# Configure pins
gpio -g mode $STATUS in
gpio -g mode $POWERKEY out
gpio -g mode $DISABLE out


function power_up_module()
{
	for i in {1..20}; do
		if [[ $(gpio -g read $STATUS) -eq 1 ]]; then
			debug "Module is powering up..."

			gpio -g write $POWERKEY 0
			gpio -g write $POWERKEY 1
			sleep 2
			gpio -g write $POWERKEY 0
			sleep 5

			if [[ $(gpio -g read $STATUS) -eq 0 ]]; then
				debug "Module is powered up."
				return 0
				break
			else
				debug "Module couldn't be powered up!"
				sleep 2
			fi
		else
			debug "Module is just powered up."
			return 0
			break
		fi
	done
	return 1 
}

function restart_power()
{
	debug "Power of the module is restarting..."
	# Restart power
	gpio -g write $DISABLE 0 # power is disabled 
	sleep 2
	gpio -g write $DISABLE 1 # power is enabled
}

#restart_power

# Modem power up
if power_up_module -eq 0 ; then sleep 0.1; else debug "Module couldn't be powered up! Check the hardware setup!"; fi

if check_network -eq 0; then 
    debug "PPP chatscript is starting...";
    sudo pon;

	# check default interface
	route | grep ppp | grep default > /dev/null
	PPP_IS_DEFAULT=$?
	if [[ $PPP_IS_DEFAULT -ne 0 ]]; then sudo route add default ppp0; debug "ppp0 is added as default interface manually."; fi
else 
    debug "Network registration is failed!";
fi 

while true; do
    # Checking cellular internet connection
    ping -q -c 1 -s 0 -w $PING_TIMEOUT -I ppp0 8.8.8.8 > /dev/null 2>&1
    PINGG=$?

    if [[ $PINGG -eq 0 ]]; then
        printf "."
    else
        printf "/"
        sleep $DOUBLE_CHECK_WAIT
	    # Checking cellular internet connection
        ping -q -c 1 -s 0 -w $PING_TIMEOUT -I ppp0 8.8.8.8 > /dev/null 2>&1
        PINGG=$?

        if [[ $PINGG -eq 0 ]]; then
            printf "+"
        else
	        debug "Connection is down, reconnecting..."
			restart_power
			if power_up_module -eq 0 ; then sleep 0.1; else debug "Module couldn't be powered up! Check the hardware setup!"; fi
            if check_network -eq 0; then sleep 0.1; else debug "Network registration is failed!"; fi
	        sudo pon

			# check default interface
			route | grep ppp | grep default > /dev/null
			PPP_IS_DEFAULT=$?
			if [[ $PPP_IS_DEFAULT -ne 0 ]]; then sudo route add default ppp0; debug "ppp0 is added as default interface manually."; fi
	    fi
    fi
	sleep $INTERVAL
done