class Player < ApplicationRecord

  validates_presence_of :name

  has_many :answers, dependent: :destroy


  def update_answer_cache
    self.update_column(:answer_cache, self.answers.ordered.pluck(:value))
  end


  def stats
    total_with_five = Player.where("array_length(answer_cache, 1) = 5")
                            .where.not(id: self.id)
                            .count

    matching_answers =  Player.where(answer_cache: self.answer_cache)
                              .where("array_length(answer_cache, 1) = 5")
                              .where.not(id: self.id)
                              .count

    # Calculate percentage
    if total_with_five > 0
      percentage = (matching_answers.to_f / total_with_five) * 100
      percentage_string = percentage.round.to_s
    else
      percentage_string = "0"
    end

    percentage_string

  end

end