#!/bin/sh

if ! [ -x "$(command -v docker)" ]; then
  echo 'Unable to find docker command, please install Docker (https://www.docker.com/) and retry' >&2
  exit 1
fi

export BASIC_AUTH="true"

sha_cmd="shasum -a 256"
if ! command -v shasum >/dev/null; then
  sha_cmd="sha256sum"
fi

while [ ! $# -eq 0 ]
do
	case "$1" in
		--no-auth | -n)
			export BASIC_AUTH="false"
			;;
    --help | -h)
			echo "Usage: \n [default]\tdeploy the OpenFaaS core services\n --no-auth [-n]\tdisable basic authentication.\n --help\tdisplays this screen"
      exit
			;;
	esac
	shift
done

# Secrets should be created even if basic-auth is disabled.
echo "Attempting to create credentials for gateway.."
echo "admin" | docker secret create basic-auth-user -
secret=$(head -c 16 /dev/urandom| $sha_cmd | cut -d " " -f 1)
echo "$secret" | docker secret create basic-auth-password -
if [ $? = 0 ];
then
  echo "[Credentials]\n username: admin \n password: $secret\n echo -n "$secret" | faas-cli login --username=admin --password-stdin"
else
  echo "[Credentials]\n already exist, not creating"
fi

if [ $BASIC_AUTH = "true" ];
then
  echo ""
  echo "Enabling basic authentication for gateway.."
  echo ""
else
  echo ""
  echo "Disabling basic authentication for gateway.."
  echo ""
fi

echo "Deploying OpenFaaS core services"

docker stack deploy func --compose-file docker-compose.yml