#!/bin/sh

#@@@@#

LOGFILE="/home/sats/satsd/log/install.log";


plog(){
	sudo -u sats tee -a /home/sats/satsd/log/install.log > /dev/null;
}

slog(){
	echo "$1" | plog;
}

failexit(){
	slog " > failed";
	exit 127;
}



# [1] Notify boot (first or normal) #
echo;
test ! -e /target/sync && echo "First Boot"  | plog;
test   -e /target/sync && echo "Normal Boot" | plog;
slog "============";


# [2] Start ssh service
slog " * 1. Starting ssh service";
sudo systemctl start ssh \
	&& slog " > done" \
	|| failexit;

# [3] Set random passwords for 'sats'
echo " * 2. Changing sats password" | plog;
RANDOM_PASS=$(tr -cd A-Za-z0-9_ < /dev/urandom | head -c 256);
echo -ne "$RANDOM_PASS\n$RANDOM_PASS\n" | sudo passwd sats;
test $? -eq 0 \
	&& slog " > done" \
	|| failexit;

# [4] Set random passwords for 'pi' itself
echo " * 3. Changing pi password" | plog;
RANDOM_PASS=$(tr -cd A-Za-z0-9_ < /dev/urandom | head -c 256);
echo -ne "$RANDOM_PASS\n$RANDOM_PASS\n" | sudo passwd pi;
test $? -eq 0 \
	&& slog " > done" \
	|| failexit;




################################################
####          ONLY ON FIRST BOOT            ####
################################################
if [ ! -e /target/sync ]; then

	# (x) If no network -> exit #
	slog " * 4. Checking connectivity";
	test $(systemctl is-active network-online.target) = "active" \
		&& slog " > done" \
		|| failexit;


	# [1] Installation
	#========================================================#
	# (1) Try to install necessary packages
	slog " * 5. Updating packages";
	sudo apt-get update;
	test $? -eq 0 \
		&& slog " > done" \
		|| failexit;

	slog " * 6. Installing necessary packages";
	sudo apt-get -y install git php5 php5-cli php5-curl python-dev;
	test $? -eq 0 \
		&& slog " > done" \
		|| failexit;


	BRANCH=$(sudo cat /home/sats/satsd/conf/machine.branch) > /dev/null;

	# (2) With git if installed #
	slog " * 7. Cloning source";
	if `sudo -u sats test -d /home/sats/satsd/source`; then
		slog " > done (already cloned)";
	else
		sudo -u sats git clone -b $BRANCH ssh://smmp-server/satsd/git /home/sats/satsd/source \
			&& slog " > done" \
			|| failexit;
	fi;



	# (2) Enable SPI device #
	echo " * 8. Enabling spi device";
	echo "dtparam=spi=on"        | sudo tee -a /boot/config.txt > /dev/null \
		|| failexit;
	echo "dtoverlay=spi-bcm2708" | sudo tee -a /boot/config.txt > /dev/null \
		|| failexit;
	slog " > done";

	# (3) Clone SPI python library #
	slog " * 9. Cloning 'SPI-Py' lib";
	if [ -d /home/pi/spi-lib ]; then
		slog " > done (already cloned)";
	else
		git clone https://github.com/lthiery/SPI-Py.git /home/pi/spi-lib \
			&& slog " > done" \
			|| failexit;
	fi;

	# (4) Install SPI python library #
	slog " * 10. Installing 'SPI-Py' lib into the system";
	cd /home/pi/spi-lib;
	sudo python setup.py build \
		|| failexit;
	sudo python setup.py install \
		|| failexit;
	slog " > done";


	# [2] Synchronization
	#========================================================#
	# (1) Process sync #
	slog " * 11. Synchronizing the SATS with SMMP's server";
	test "$(sudo -u sats /home/sats/satsd/source/lib/api/sync)" = "0" \
		&& slog " > done" \
		||  failexit;

	# (2) Create target file #
	slog " * 12. Creating target file 'sync'";
	sudo -u sats touch /target/sync \
		&& slog " > done" \
		|| failexit;

	# (3) Reboot to activate SPI #
	slog " * 13. Launching first reboot";
	sudo reboot;

fi;