class BenchmarkResult < ActiveRecord::Base

  belongs_to :benchmark_info, inverse_of: :benchmark_results

  belongs_to :benchmark_batch, inverse_of: :benchmark_results

  has_many :benchmark_durations, dependent: :destroy, inverse_of: :benchmark_result

  has_many :benchmark_parameters, dependent: :destroy, inverse_of: :benchmark_result

  scope :for_configuration_id, -> (configuration_id) do

    joins(:benchmark_batch).

      where("benchmark_batches.benchmark_configuration_id = ?", configuration_id)

  end

  scope :with_batch_and_duration_preloaded, -> do

    includes(:benchmark_batch, :benchmark_durations)

  end

  scope :newest_first, -> do

    order("benchmark_batches.performed_at desc, benchmark_batches.created_at desc")

  end

  def average_duration

    sum = benchmark_durations.inject(0) { |acc, val| acc += val.duration }

    sum / benchmark_durations.size

  end

  def min_duration

    benchmark_durations.map { |duration| duration.duration }.min

  end

  def max_duration

    benchmark_durations.map { |duration| duration.duration }.max

  end

  def to_json

    { timestamp: performed_at.to_i, value: min_duration }

  end

  def performed_at

    benchmark_batch.performed_at

  end

  def benchmark_parameters_json

    JSON.generate(benchmark_parameters.collect { |p| p.to_json } )

  end

end

# == Schema Information

#

# Table name: benchmark_results

#

#  id                 :integer          not null, primary key

#  benchmark_info_id  :integer

#  created_at         :datetime

#  updated_at         :datetime

#  benchmark_batch_id :integer

#