# frozen_string_literal: true

module Spree
  module Core
    class MailSettings
      MAIL_AUTH = ['None', 'plain', 'login', 'cram_md5'].freeze
      SECURE_CONNECTION_TYPES = ['None', 'SSL', 'TLS'].freeze

      # Override the Rails application mail settings based on preferences
      def self.init
        new.override!
      end

      def override!
        ActionMailer::Base.default_url_options[:host] ||= ENV.fetch("SITE_URL", Config.site_url)
        ActionMailer::Base.smtp_settings = mail_server_settings
        ActionMailer::Base.perform_deliveries = true
      end

      private

      def mail_server_settings
        settings = if need_authentication?
                     basic_settings.merge(user_credentials)
                   else
                     basic_settings
                   end

        settings.merge(enable_starttls_auto: secure_connection?)
      end

      def user_credentials
        { user_name: Config.smtp_username,
          password: Config.smtp_password }
      end

      def basic_settings
        { address: Config.mail_host,
          domain: Config.mail_domain,
          port: Config.mail_port,
          authentication: Config.mail_auth_type }
      end

      def need_authentication?
        Config.mail_auth_type != 'None'
      end

      def secure_connection?
        Config.secure_connection_type == 'TLS'
      end
    end
  end
end