#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(dirname $0)/../common/functions"
source "$(dirname $0)/functions"

case "$1" in
  certs:generate)
    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
    verify_app_name "$2"
    APP="$2"; DOMAIN="$3"; SSL_PATH="$DOKKU_ROOT/$APP/tls"

    if [[ ! -f "$SSL_PATH/server.key" ]] && [[ ! -f "$SSL_PATH/server.crt" ]]; then
      TMP_WORK_DIR=$(mktemp -d -t "dokku_certs.XXXXXXXXX")
      trap 'rm -rf "$TMP_WORK_DIR" > /dev/null' INT TERM EXIT

      pushd $TMP_WORK_DIR > /dev/null

      openssl genrsa -des3 -passout pass:x -out server.pass.key 2048
      openssl rsa -passin pass:x -in server.pass.key -out server.key
      openssl req -new -key server.key -out server.csr
      openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt

      mkdir -p "$DOKKU_ROOT/$APP/tls"
      mv -f $TMP_WORK_DIR/server.key $TMP_WORK_DIR/server.crt $SSL_PATH
      [[ -n "$DOMAIN" ]] && dokku domains:add $APP $DOMAIN || true
      dokku_log_info1 "The following is a certificate signing request that can be used"
      dokku_log_info1 "to generate an 'officially' signed SSL certificate for $APP at $DOMAIN"
      dokku_log_info1 "by a CA of your choosing."
      cat server.csr
    else
      dokku_log_info1 "$APP has an SSL endpoint already defined"
    fi
  ;;

  certs:info)
    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
    verify_app_name "$2"
    APP="$2"; SSL_TYPE=$(is_ssl_enabled $APP)
    case "$SSL_TYPE" in
      app)
        SSL_PATH="$DOKKU_ROOT/$APP/tls"
      ;;

      global)
        SSL_PATH="$DOKKU_ROOT/tls"
      ;;

      *)
      ;;
    esac

    if [[ -n "$SSL_PATH" ]]; then
      dokku_log_info1 "Fetching SSL Endpoint info for $APP..."
      dokku_log_info1 "Certificate details:"
      dokku_log_info2 "Common Name(s): "

      for domain in $(get_ssl_hostnames $APP | xargs); do
        dokku_log_info2 "   $domain"
      done

      dokku_log_info2 "Expires At: $(openssl x509 -in $SSL_PATH/server.crt -noout -text | grep "Not After :" | awk -F " : " '{ print $2 }')"
      dokku_log_info2 "Issuer: $(openssl x509 -in $SSL_PATH/server.crt -noout -text | grep "Issuer:" | xargs | sed -e "s/Issuer: //g")"
      dokku_log_info2 "Starts At: $(openssl x509 -in $SSL_PATH/server.crt -noout -text | grep "Not Before:" | awk -F ": " '{ print $2 }')"
      dokku_log_info2 "Subject: $(openssl x509 -in $SSL_PATH/server.crt -noout -subject | sed -e "s:subject= ::g"| sed -e "s:^/::g" | sed -e "s:/:; :g")"
      SSL_VERIFY_OUTPUT="$(openssl verify -verbose -purpose sslserver $SSL_PATH/server.crt | awk -F ':' '{ print $2 }' | tail -1 | xargs || true)"
      if [[ "$SSL_VERIFY_OUTPUT" == "OK" ]]; then
        SSL_SELF_SIGNED="verified by a certificate authority."
      else
        SSL_SELF_SIGNED="self signed."
      fi
      dokku_log_info2 "SSL certificate is $SSL_SELF_SIGNED"
    else
      dokku_log_info1 "$APP does not have an SSL endpoint"
    fi
  ;;

  certs:remove)
    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
    verify_app_name "$2"
    APP="$2"; APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"

    if [[ -d "$APP_SSL_PATH" ]]; then
      dokku_log_info1 "Removing SSL endpoint from $APP"
      rm -rf $APP_SSL_PATH
      pluginhook post-domains-update $APP
    else
      dokku_log_info1 "An app-specific SSL endpoint is not defined"
    fi
  ;;

  help | certs:help)
    cat && cat<<EOF
    certs:generate <app> DOMAIN, Generate a key and certificate signing request (and self-signed certificate)
    certs:info <app>, Show certificate information for an ssl endpoint.
    certs:remove <app>, Remove an SSL Endpoint from an app.
EOF
    ;;

  *)
    exit $DOKKU_NOT_IMPLEMENTED_EXIT
    ;;

esac