#!/bin/bash
# Create a real cert for each file in config/conf.d/.

## Variables ##

DIR=`dirname $0`
if [[ $DIR == \.* ]]; then
	DIR=`pwd`
fi

# Where the files need to live.
CERT_DIR=$DIR/../../Volumes/ReverseProxy/letsencrypt-certs
echo "CERT_DIR=$CERT_DIR"

## Validations ##

# Ensure that fake certs were created at some point, or that the system has been run at least once.
if [[ ! -d $CERT_DIR ]]; then
	echo "ERROR: Certificate directory does not exist yet. Run the placeholder script first." >&2
	exit 1
fi

# The container needs to be running in order to use the certbot command.
certbot_running=`docker ps | grep -c reverseproxy-certbot-1`
if [[ $certbot_running != 1 ]]; then
	echo "ERROR: Certbot container does not appear to be running, cannot continue." >&2
	exit 1
fi

## Input ##
# Gather information from the user.

echo -n "Please provide the email address you would like the certs bound to: "
read email
if [[ -z $email ]]; then
	echo "ERROR: Email address is mandatory. $email" >&2
	exit 1
fi

echo -n "Please double check that '$email' looks correct and provide Yes if so: "
typeset -u confirm
read confirm
if [[ $confirm != "Y"* ]]; then
	echo "Email address was not confirmed, received '$confirm', aborting."
	exit 0
fi

echo -n "Is this a test run? [Y/n]: "
typeset -l test dry_run
read test
if [[ $test == "y"* || -z $test ]]; then
	dry_run="--dry-run"
	echo "   Great! Running with $dry_run to avoid using up requests."
else
	echo "   Requesting live certificates for new domains."
fi

## Main ##

# Loop over the proxy configuration files and ensure they have certs.
grep -l proxy_pass $DIR/config/conf.d/*.* | while read file; do
	filename=`basename $file`
	echo -e "\n"

	if [[ $filename == *"example.com"* ]]; then
		echo "Skipping $filename since it is only an example."
		continue
	fi

	echo  "*** Checking $filename ***"
	if [[ -f $CERT_DIR/$filename/SELF ]]; then
		echo "Removing self-signed certs."
		rm -rfv $CERT_DIR/$filename
	fi
	if [[ ! -d $CERT_DIR/$filename ]]; then
		echo "Getting the domains which need the cert."
		domains=`grep -v '$server_name' $file | grep server_name`

		# Clean up the data by removing the directive and semi-colon, changing
		#  spaces to commas, and making sure there are no gaps.
		domains=${domains//server_name/}
		domains=${domains//;/}
		domains=`echo $domains`
		domains=${domains// /,}
		echo "Domains='$domains'"

		echo "Attempting to create certs at $CERT_DIR/$filename."
		docker exec reverseproxy-certbot-1  \
				certbot certonly -n --webroot $dry_run \
				-w /etc/letsencrypt --agree-tos -m $email -d $filename

		if [[ -z $dry_run ]]; then
			docker exec reverseproxy-certbot-1 \
					sh -c "cp -rL /etc/letsencrypt/live/$filename /etc/letsencrypt/nginx/"
			ls -lh $CERT_DIR/$filename/*
		fi
	else
		echo "Website's certificate folder already exists, skipping."
		continue
	fi
done

exit 0