class SubcategoryPresenter
  def initialize(subcategory:, academic_year:, school:)
    @subcategory = subcategory
    @academic_year = academic_year
    @school = school
    @student_response_rate = StudentResponseRate.new(subcategory: @subcategory, school: @school,
                                                     academic_year: @academic_year)
    @teacher_response_rate = TeacherResponseRate.new(subcategory: @subcategory, school: @school,
                                                     academic_year: @academic_year)
  end

  def id
    @subcategory.subcategory_id
  end

  def name
    @subcategory.name
  end

  def description
    @subcategory.description
  end

  def gauge_presenter
    GaugePresenter.new(scale: scale, score: average_score)
  end

  def subcategory_card_presenter
    SubcategoryCardPresenter.new(name: @subcategory.name, scale: scale, score: average_score)
  end

  def average_score
    @average_score ||= SurveyItemResponse.score_for_subcategory(subcategory: @subcategory, school: @school,
                                                                academic_year: @academic_year)
  end

  def student_response_rate
    @student_response_rate.rate
  end

  def teacher_response_rate
    @teacher_response_rate.rate
  end

  def admin_collection_rate
    [0, @subcategory.measures.map { |measure| measure.admin_data_items.count }.sum]
  end

  def measure_presenters
    @subcategory.measures.includes([:admin_data_items]).sort_by(&:measure_id).map do |measure|
      MeasurePresenter.new(measure: measure, academic_year: @academic_year, school: @school)
    end
  end

  private

  def scale
    Scale.new(
      watch_low_benchmark: measures.map(&:watch_low_benchmark).average,
      growth_low_benchmark: measures.map(&:growth_low_benchmark).average,
      approval_low_benchmark: measures.map(&:approval_low_benchmark).average,
      ideal_low_benchmark: measures.map(&:ideal_low_benchmark).average
    )
  end

  def measures
    @measures ||= @subcategory.measures.includes([:admin_data_items]).order(:measure_id)
  end
end