require "image_processing/vips"

module LdapManager
  class UpdateAvatar < LdapManagerService
    def initialize(dn:, file:)
      @dn = dn
      @img_data = process(file)
    end

    def call
      Rails.logger.debug { "Storing jpegPhoto for dn=#{@dn}, size=#{@img_data.bytesize}" }
      result = replace_attribute @dn, :jpegPhoto, @img_data
      Rails.logger.debug { "LDAP replace_attribute result: #{result}" }
      result
    end

    private

    def process(file)
      processed = ImageProcessing::Vips
        .resize_to_fill(256, 256)
        .source(file)
        .convert("jpeg")
        .saver(strip: true)
        .call

      data = processed.read

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

      data
    end
  end
end