class Tag < ActiveRecord::Base

  has_and_belongs_to_many :benchmark_batches

  def all_configurations

    benchmark_batches.map(&:benchmark_configuration).uniq

  end

  def all_benchmark_infos

    benchmark_batches.

      flat_map(&:benchmark_results).

      map(&:benchmark_info).

      uniq.

      sort { |a, b| a.name <=> b.name }

  end

  def latest_results_for(benchmark_info, benchmark_configuration)

    benchmark_batches.

      joins(:benchmark_results).

      where(benchmark_configuration: benchmark_configuration,

            benchmark_results: { benchmark_info: benchmark_info }).

      max { |a, b| a.performed_at <=> b.performed_at }.

      result_for(benchmark_info)

  end

end