# frozen_string_literal: true

class Element < ApplicationRecord
  has_rich_text :description

  belongs_to :page, touch: true
  has_many :success_criteria, dependent: :destroy

  delegate :report, to: :page

  after_validation :set_position

  # Calculate actual conformity level:
  # - if a success_criterion has result :failed -> the confirmity_level
  #   of that success_criterion is not reached.
  # - the resulting level is the highest readched level
  #   abeying rule above.
  def level
    return nil
    return nil unless success_criteria.all(&:result)

    min_failed = success_criteria.select(&:failed?).map(&:level).min
    possible_levels = success_criteria.select(&:passed?).map(&:level).uniq

    return nil if possible_levels.empty?

    Rails.logger.debug possible_levels.inspect
    Rails.logger.debug min_failed
    possible_levels[possible_levels.find_index(min_failed) - 1]
  end

  def max_level
    @max_level ||= success_criteria.reject(&:not_applicable?).max(&:level)
  end

  def set_position
    Rails.logger.debug("element: position #{position}")
    self.position ||= (page.elements.pluck(:position).max || 0) + 1
  end
end