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