class Messages::Messenger::MessageBuilder
  def process_attachment(attachment)
    return if attachment['type'].to_sym == :template

    attachment_obj = @message.attachments.new(attachment_params(attachment).except(:remote_file_url))
    attachment_obj.save!
    attach_file(attachment_obj, attachment_params(attachment)[:remote_file_url]) if attachment_params(attachment)[:remote_file_url]
  end

  def attach_file(attachment, file_url)
    attachment_file = Down.download(
      file_url
    )
    attachment.file.attach(
      io: attachment_file,
      filename: attachment_file.original_filename,
      content_type: attachment_file.content_type
    )
  end

  def attachment_params(attachment)
    file_type = attachment['type'].to_sym
    params = { file_type: file_type, account_id: @message.account_id }

    if [:image, :file, :audio, :video].include? file_type
      params.merge!(file_type_params(attachment))
    elsif file_type == :location
      params.merge!(location_params(attachment))
    elsif file_type == :fallback
      params.merge!(fallback_params(attachment))
    end

    params
  end

  def file_type_params(attachment)
    {
      external_url: attachment['payload']['url'],
      remote_file_url: attachment['payload']['url']
    }
  end
end