#!/usr/bin/env ruby

require 'net/smtp'
require 'time'
require 'securerandom'
require 'tempfile'

admin_email = ENV.fetch('ADMIN_EMAIL') { fail "no ADMIN_EMAIL set" }
smtp_domain = ENV.fetch('SMTP_DOMAIN') { "example.net" }
from = "no-reply@#{smtp_domain}"
delivery_method = ENV.fetch('EMAIL_DELIVERY_METHOD') { "sendmail" }

msgstr = <<~END_OF_MESSAGE
    From: OpenProject <#{from}>
    To: #{admin_email}
    Subject: Test message
    Date: #{Time.now.httpdate}
    Message-Id: <#{SecureRandom.hex}@#{smtp_domain}>
  #{'  '}
    This is a test message to verify your OpenProject settings.
    If you see this, this means OpenProject email settings are working properly.
END_OF_MESSAGE

if delivery_method == "sendmail"
  puts "sending test email using sendmail..."
  tmpfile = Tempfile.new("mail-test")
  File.open(tmpfile.path, "w+") { |f| f << msgstr }
  system("cat #{tmpfile.path} | sendmail -i -t") || exit(1)
else
  smtp_authentication = ENV.fetch('SMTP_AUTHENTICATION', "none").to_sym
  # set authentication to nil because :none is not supported by SMTP module
  smtp_authentication = nil if smtp_authentication == :none
  puts "sending test email using SMTP..."
  smtp = Net::SMTP.new(
    ENV.fetch('SMTP_HOST'),
    ENV.fetch('SMTP_PORT')
  )
  smtp.enable_starttls_auto if ENV.fetch('SMTP_ENABLE_STARTTLS_AUTO', 'false') == 'true'
  smtp.start(
    ENV.fetch('SMTP_DOMAIN'),
    ENV.fetch('SMTP_USERNAME', nil),
    ENV.fetch('SMTP_PASSWORD', nil),
    smtp_authentication
  )
  smtp.send_message msgstr, from, admin_email
  smtp.finish
end