module LdapManager
  class FetchAvatar < LdapManagerService
    def initialize(cn:)
      @cn = cn
    end

    def call
      treebase   = ldap_config["base"]
      attributes = %w{ jpegPhoto }
      filter     = Net::LDAP::Filter.eq("cn", @cn)

      entry = client.search(base: treebase, filter: filter, attributes: attributes).first

      if entry&.jpegPhoto
        binary_data = entry.jpegPhoto.first # Use first value (binary)
        Rails.logger.debug { "Fetched jpegPhoto size: #{binary_data.bytesize}" }
        create_tempfile(binary_data)
      else
        Rails.logger.debug { "No jpegPhoto found for cn=#{@cn}, ou=#{@ou}" }
        nil
      end
    end

    def create_tempfile(binary_data)
      tempfile = Tempfile.new(['image', '.jpg'])
      tempfile.binmode
      tempfile.write(binary_data)
      tempfile.rewind

      Rails.logger.debug { "Storing debug file for cn=#{@cn}, size=#{tempfile.size}" }

      data = tempfile.read

      debug_file_path = "#{Rails.root}/tmp/avatar-fetched.jpg"
      debug_file = File.open(debug_file_path, 'wb')
      debug_file.write(data)
      debug_file.close

      data
    end
  end
end