#!/bin/bash

WORKING_DIR=/usr/share/fastapi-dls
CONFIG_DIR=/etc/fastapi-dls

if [ ! -f $CONFIG_DIR/instance.private.pem ]; then
  echo "> Create dls-instance keypair ..."
  openssl genrsa -out $CONFIG_DIR/instance.private.pem 2048
  openssl rsa -in $CONFIG_DIR/instance.private.pem -outform PEM -pubout -out $CONFIG_DIR/instance.public.pem
else
  echo "> Create dls-instance keypair skipped! (exists)"
fi

while true; do
  [ -f $CONFIG_DIR/webserver.key ] && default_answer="N" || default_answer="Y"
  [ $default_answer == "Y" ] && V="Y/n" || V="y/N"
  read -p "> Do you wish to create self-signed webserver certificate? [${V}]" yn
  yn=${yn:-$default_answer} # ${parameter:-word} If parameter is unset or null, the expansion of word is substituted. Otherwise, the value of parameter is substituted.
  case $yn in
  [Yy]*)
    echo "> Generating keypair ..."
    openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout $CONFIG_DIR/webserver.key -out $CONFIG_DIR/webserver.crt
    break
    ;;
  [Nn]*) echo "> Generating keypair skipped! (exists)"; break ;;
  *) echo "Please answer [y] or [n]." ;;
  esac
done

if [ -f $CONFIG_DIR/webserver.key ]; then
  echo "> Starting service ..."
  systemctl start fastapi-dls.service

  if [ -x "$(command -v curl)" ]; then
    echo "> Testing API ..."
    source $CONFIG_DIR/env
    curl --insecure -X GET https://$DLS_URL:$DLS_PORT/-/health
  else
    echo "> Testing API failed, curl not available. Please test manually!"
  fi
fi

chown -R www-data:www-data $CONFIG_DIR
chown -R www-data:www-data $WORKING_DIR

cat <<EOF

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#                                                                             #
#    fastapi-dls is now installed.                                            #
#                                                                             #
#    Service should be up and running.                                        #
#      Webservice is listen to https://localhost                              #
#                                                                             #
#    Configuration is stored in /etc/fastapi-dls/env.                         #
#                                                                             #
#                                                                             #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

EOF