class SplitIoClient::Api::Splits

def initialize(api_key, config, telemetry_runtime_producer)
  super(config)
  @api_key = api_key
  @telemetry_runtime_producer = telemetry_runtime_producer
  @flag_sets_filter = @config.flag_sets_filter
end

def since(since, fetch_options = { cache_control_headers: false, till: nil, sets: nil })
  start = Time.now
  params = { since: since }
  params[:till] = fetch_options[:till] unless fetch_options[:till].nil?
  params[:sets] = @flag_sets_filter.join(",") unless @flag_sets_filter.empty?
  @config.logger.debug("Fetching from splitChanges with #{params}: ")
  response = get_api("#{@config.base_uri}/splitChanges", @api_key, params, fetch_options[:cache_control_headers])
  if response.status == 414
    @config.logger.error("Error fetching feature flags; the amount of flag sets provided are too big, causing uri length error.")
    raise ApiException.new response.body, 414
  end
  if response.success?
    result = splits_with_segment_names(response.body)
    unless result[:splits].empty?
      @config.split_logger.log_if_debug("#{result[:splits].length} feature flags retrieved. since=#{since}")
    end
    @config.split_logger.log_if_transport("Feature flag changes response: #{result.to_s}")
    bucket = BinarySearchLatencyTracker.get_bucket((Time.now - start) * 1000.0)
    @telemetry_runtime_producer.record_sync_latency(Telemetry::Domain::Constants::SPLIT_SYNC, bucket)
    @telemetry_runtime_producer.record_successful_sync(Telemetry::Domain::Constants::SPLIT_SYNC, (Time.now.to_f * 1000.0).to_i)
    result
  else
    @telemetry_runtime_producer.record_sync_error(Telemetry::Domain::Constants::SPLIT_SYNC, response.status)
    @config.logger.error("Unexpected status code while fetching feature flags: #{response.status}. " \
    'Check your API key and base URI')
    raise 'Split SDK failed to connect to backend to fetch feature flags definitions'
  end
end

def splits_with_segment_names(splits_json)
  parsed_splits = JSON.parse(splits_json, symbolize_names: true)
  parsed_splits[:segment_names] =
    parsed_splits[:splits].each_with_object(Set.new) do |split, splits|
      splits << Helpers::Util.segment_names_by_feature_flag(split)
    end.flatten
  parsed_splits
end