#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x

APP="$1"; PORT="$2"
VHOST_PATH="$DOKKU_ROOT/$APP/VHOST"
WILDCARD_SSL="$DOKKU_ROOT/tls"
SSL="$DOKKU_ROOT/$APP/tls"

set +e; NO_VHOST=$(dokku config:get $APP NO_VHOST); set -e

restart_nginx () {
  case "$DOKKU_DISTRO" in
    ubuntu)
      sudo /etc/init.d/nginx reload > /dev/null
      ;;

    opensuse)
      sudo /sbin/service nginx reload > /dev/null
      ;;
  esac
}

if [[ -n "$NO_VHOST" ]]; then
  echo "-----> NO_VHOST config detected"
elif [[ ! -f "$DOKKU_ROOT/$APP/VHOST" ]]; then
  dokku domains:setup $APP
fi

NONSSL_VHOSTS=`cat $VHOST_PATH`

if [[ ! -n "$NO_VHOST" ]]; then
  if [[ -e "$SSL/server.crt" ]] && [[ -e "$SSL/server.key" ]]; then
    SSL_INUSE="$SSL"
    SSL_DIRECTIVES=$(cat <<EOF
  ssl_certificate     $SSL_INUSE/server.crt;
  ssl_certificate_key $SSL_INUSE/server.key;
EOF
)
  elif  [[ -e "$WILDCARD_SSL/server.crt" ]] && [[ -e "$WILDCARD_SSL/server.key" ]]; then
    SSL_INUSE="$WILDCARD_SSL"
    SSL_DIRECTIVES=""
  fi

  NGINX_CONF="$PLUGIN_PATH/nginx-vhosts/templates/nginx.conf"
  SCHEME="http"
  if [[ -n "$SSL_INUSE" ]]; then
    NGINX_CONF="$PLUGIN_PATH/nginx-vhosts/templates/nginx.ssl.conf"
    SCHEME="https"

    SSL_HOSTNAME=`openssl x509 -in $SSL_INUSE/server.crt -noout -subject | tr '/' '\n' | grep CN= | cut -c4-`
    SSL_HOSTNAME=`echo "$SSL_HOSTNAME" | sed 's|\.|\\.|g' | sed 's/\*/\.\*/g'`
    SSL_VHOSTS=`grep "$SSL_HOSTNAME" $VHOST_PATH`
    NONSSL_VHOSTS=`grep -v "$SSL_HOSTNAME" $VHOST_PATH`

    while read line; do
      echo "-----> Configuring SSL for $line..."
      SSL_SERVER_NAME=$line
      eval "cat <<< \"$(< $NGINX_CONF)\" >> $DOKKU_ROOT/$APP/nginx.conf"
    done <<< "$SSL_VHOSTS"
  fi

  APP_NGINX_TEMPLATE="$DOKKU_ROOT/$APP/nginx.conf.template"
  if [[ -f $APP_NGINX_TEMPLATE ]]; then
    echo "-----> Overriding default nginx.conf with detected nginx.conf.template"
    NGINX_CONF=$APP_NGINX_TEMPLATE
  fi

  cat $VHOST_PATH | xargs -i echo "-----> Configuring {}..."
  NOSSL_SERVER_NAME=`echo $NONSSL_VHOSTS | tr '\n' ' '`

  echo "-----> Creating $SCHEME nginx.conf"
  echo "upstream $APP { server 127.0.0.1:$PORT; }" > $DOKKU_ROOT/$APP/nginx.conf
  eval "cat <<< \"$(< $NGINX_CONF)\" >> $DOKKU_ROOT/$APP/nginx.conf"

  echo "-----> Running nginx-pre-reload"
  pluginhook nginx-pre-reload $APP $PORT

  echo "       Reloading nginx"
  restart_nginx
else
  if [[ -f "$DOKKU_ROOT/$APP/VHOST" ]]; then
    echo "-----> NO_VHOST set, deleting $APP/VHOST"
    rm "$DOKKU_ROOT/$APP/VHOST"
  fi
  if [[ -f "$DOKKU_ROOT/$APP/nginx.conf" ]]; then
    echo "-----> NO_VHOST set, deleting nginx.conf"
    rm "$DOKKU_ROOT/$APP/nginx.conf"

    echo "-----> NO_VHOST set, reloading nginx after nginx.conf deletion"
    restart_nginx
  fi
fi
