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# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

# frozen_string_literal: true

module ElasticAPM
  class Config
    # @api private
    class ServerInfo
      attr_reader :payload, :config, :http

      VERSION_8_0 = '8.0'
      VERSION_0 = '0'

      def initialize(config)
        @config = config
        @http = Transport::Connection::Http.new(config)
      end

      def execute
        resp = http.get(config.server_url)
        @payload = JSON.parse(resp.body)
      rescue
        @payload = { "version" => VERSION_0 }
      end

      def version
        @version ||= begin
          execute
          payload["version"] ? payload["version"].to_s : VERSION_0
        end
      end
    end
  end
end