module AsyncExperiments

# File lib/async_experiments.rb, line 54
def self.fix_ordering_issues(missing_entries, extra_entries)
  duplicate_entries = missing_entries & extra_entries

  missing_entries = missing_entries.reject { |entry| duplicate_entries.include?(entry) }
  extra_entries = extra_entries.reject { |entry| duplicate_entries.include?(entry) }

  [missing_entries, extra_entries]
end

# File lib/async_experiments.rb, line 16
def self.get_experiment_data(experiment_name)
  key_pattern = "experiments:#{experiment_name}:mismatches:*"
  mismatched_responses = redis_scan_and_retrieve(key_pattern).map do |json|
    JSON.parse(json)
  end

  mismatched_responses.map do |parsed|
    missing, other = parsed.partition { |(operator)| operator == "-" }

    extra, changed = other.partition { |(operator)| operator == "+" }

    missing_entries, extra_entries = self.fix_ordering_issues(
      missing.map(&:last),
      extra.map(&:last),
    )

    {
      missing: missing_entries,
      extra: extra_entries,
      changed: changed.map(&:last),
    }
  end
end

# File lib/async_experiments.rb, line 40
def self.get_experiment_exceptions(experiment_name)
  redis_scan_and_retrieve("experiments:#{experiment_name}:exceptions:*")
end

# File lib/async_experiments.rb, line 44
def self.redis_scan_and_retrieve(key_pattern)
  Sidekiq.redis do |redis|
    enumerator = redis.scan_each(
      match: key_pattern
    )
    retrieve = -> (key) { redis.get(key) }
    enumerator.map(&retrieve).compact
  end
end

# File lib/async_experiments.rb, line 8
def self.statsd
  @statsd
end

# File lib/async_experiments.rb, line 12
def self.statsd=(statsd)
  @statsd = statsd
end