module Report
  class Gps
    def self.to_csv
      headers = ['School', 'Pillar', 'Indicator', 'Period', 'HALS Category', 'Ref.', 'Score', 'Zone']
      attributes = %w[school_name pillar indicator period category measure_ids score zone]
      pillars = generate_pillars
      CSV.generate(headers: true) do |csv|
        csv << headers
        pillars.each do |gps|
          csv << attributes.map { |attr| gps.send(attr) }
        end
      end
    end

    def self.generate_pillars
      schools = School.all
      academic_years = AcademicYear.order(range: :desc).first(2)
      periods = %w[Current Previous]

      [].tap do |pillars|
        academic_years.zip(periods).each do |academic_year, period|
          schools.each do |school|
            INDICATORS.each do |indicator, measures|
              pillars << Pillar.new(school:, measures:, indicator:, period:, academic_year:)
            end
          end
        end
      end
    end

    INDICATORS =
      { "Teaching Environment": [Measure.includes(%i[subcategory admin_data_items]).find_by_measure_id('1A-iii'), Measure.includes(%i[subcategory admin_data_items]).find_by_measure_id('1B-ii')],
        "Safety": Subcategory.find_by_subcategory_id('2A').measures.includes(:admin_data_items),
        "Relationships": Subcategory.find_by_subcategory_id('2B').measures.includes(:admin_data_items),
        "Academic Orientation": Subcategory.find_by_subcategory_id('2C').measures.includes(:admin_data_items),
        "Facilities & Personnel": Subcategory.find_by_subcategory_id('3A').measures.includes(:admin_data_items),
        "Family-School Relationships": [Measure.includes(%i[subcategory admin_data_items]).find_by_measure_id('3C-i')],
        "Community Involvement & External Partners": [Measure.includes(%i[subcategory
                                                                          admin_data_items]).find_by_measure_id('3C-ii')],
        "Perception of Performance": Subcategory.find_by_subcategory_id('4A').measures.includes(:admin_data_items),
        "Student Commitment To Learning": Subcategory.find_by_subcategory_id('4B').measures.includes(:admin_data_items),
        "Critical Thinking": Subcategory.find_by_subcategory_id('4C').measures.includes(:admin_data_items),
        "College & Career Readiness": Subcategory.find_by_subcategory_id('4D').measures.includes(:admin_data_items) }
  end
end