if defined?(ActiveRecord)
  module ActionSmser
    class DeliveryReport < ActiveRecord::Base

      has_many :re_deliveries, :class_name => self.to_s, :foreign_key => :re_delivery_of_delivery_report_id
      belongs_to :re_delivery_of, :class_name => self.to_s, :foreign_key => :re_delivery_of_delivery_report_id, :optional => true

      def self.build_from_sms(sms, to, msg_id)
        @delivery_report = self.new

        [:from, :body, :sms_type, :re_delivery_of_delivery_report_id].each do |var|
          @delivery_report.send("#{var}=", sms.send(var))
        end
        @delivery_report.to = to
        @delivery_report.msg_id = msg_id
        @delivery_report.status = "LOCAL_SENT"
        @delivery_report.gateway = sms.delivery_options[:delivery_method].to_s
        @delivery_report
      end

      def self.create_from_sms(sms, to, sms_id)
        @delivery_report = self.build_from_sms(sms, to, sms_id)
        @delivery_report.save
        @delivery_report
      end

      def status=(stat, skip_log = false)
        self[:status] = stat
        self.status_updated_at = Time.now
        add_log("#{Time.now.to_fs(:db)}: #{stat}") unless skip_log
      end

      def add_log(str)
        self.log = "" if self.log.nil?
        self.log += "#{str}\n"
      end

      # Copy this delivery_report information to a new sms object
      def to_sms
        sms_new = ActionSmser::Base.new()
        [:sms_type, :to, :from, :body, :sms_type].each do |var|
          sms_new.send("#{var}=", self.send(var))
        end
        sms_new
      end

      # This updates re_delivered attribute for itself
      def re_delivarable_sms()
        ActionSmser::Logger.info("Re_delivering: #{self.inspect}")
        self.update_attribute(:re_delivered, true)

        sms_new = self.to_sms
        sms_new.sms_type = "#{sms_new.sms_type}.re_delivery"
        sms_new.re_delivery_of_delivery_report_id = self.id

        sms_new
      end

    end
  end
else
  # Fixes "Expected .../delivery_report.rb to define ActionSmser::DeliveryReport (LoadError)"
  module ActionSmser
    class DeliveryReport
    end
  end
end