class StudentResponseRateCalculator
  include ResponseRateCalculator

  private

  def survey_item_count
    @survey_item_count ||= begin
      survey = Survey.where(school: @school, academic_year: @academic_year).first
      survey_items = SurveyItem.includes(%i[scale
                                            measure]).student_survey_items.where("scale.measure": @subcategory.measures)
      survey_items = survey_items.where(on_short_form: true) if survey.form == 'short'
      survey_items = survey_items.reject do |survey_item|
        survey_item.survey_item_responses.where(school: @school, academic_year: @academic_year).none?
      end
      survey_items.count
    end
  end

  def response_count
    @response_count ||= @subcategory.measures.map do |measure|
      measure.student_survey_items.map do |survey_item|
        survey_item.survey_item_responses.where(school: @school,
                                                academic_year: @academic_year).exclude_boston.count
      end.sum
    end.sum
  end

  def total_possible_responses
    @total_possible_responses ||= begin
      total_responses = Respondent.where(school: @school, academic_year: @academic_year).first
      return 0 unless total_responses.present?

      total_responses.total_students
    end
  end
end

# survey = Survey.where(school:, academic_year:).first
# total_possible_student_responses = Respondent.where(school:, academic_year:).first

# student_survey_items = Subcategory.all.map do |subcategory|
#   subcategory.measures.map do |measure|
#     measure.student_scales.map do |scale|
#       scale.survey_items.count
#     end.sum
#   end.sum
# end
# student_response_counts = Subcategory.all.map do |subcategory|
#   subcategory.measures.map do |measure|
#     measure.student_survey_items.map do |survey_item|
#       survey_item.survey_item_responses.where(school:, academic_year:).exclude_boston.count
#     end.sum
#   end.sum
# end

# student_response_counts.each_with_index.map do |value, index|
#   value.to_f / student_survey_items[index] / total_possible_student_responses * 100
# end