#!/usr/bin/env ruby

class Entry
  @@queue = []
  def self.include_serach
    (class_variables - @@queue).each do |attribute|
      method_name  = attribute.to_s[2..-1]
      define_singleton_method("find_by_#{method_name}") do |key|
        @@queue.select { |e| e.instance_variable_get(attribute.to_s[1..-1]) == key }
      end
      define_singleton_method("find_first_by_#{method_name}") do |key|
        @@queue.find { |e| e.instance_variable_get(attribute.to_s[1..-1]) == key }
      end
    end
  end
end

class Person < Entry
  @@name = 0
  @@surname = 0
  @@age = 0
  @@sex = 0
  include_serach

  def initialize(name, surname, age, sex)
    @name = name
    @surname = surname
    @age = age
    @sex = sex
    @@queue.unshift(self)
  end
end

NAMES = %w[Jordan James Liza Hans Vano Sasha].freeze
SURNAMES = %w[Pitt Last LaBrie Sharshepkin Barret].freeze
SEX = %w[M F].freeze

100.times do |name, surname, sex|
  name = NAMES[rand(NAMES.length)]
  surname = SURNAMES[rand(SURNAMES.length)]
  sex = SEX[rand(SEX.length)]
  Person.new(name, surname, rand(100), sex)
end

p Person.find_first_by_surname('Sharshepkin')