#!/usr/bin/env ruby
# Can run on any computer with ruby installed, with "ruby run_names.rb"

adults = [ 'Allen', 'Vickie', 'Matt', 'Lisa', 'James', 'Pich', 'Kristen', 'Jason', 'Markie' ]
kids = [ 'Malachi', 'Isaiah', 'Samara', 'Ethan', 'Kennedi', 'Kasen', 'Griffin', 'Millie', 'Otto' ]
names = adults

class Participant

  attr_accessor :name
  attr_accessor :buys_for

  def initialize name
    @name = name
  end

end

participants = Array.new
names.each { |name| participants.push Participant.new(name) }

# put everyone's name in the hat
hat = Array.new
participants.each { |participant| hat.push participant }

# randomize the order names are picked
pick_order = participants.shuffle

# pick names from hat, making sure they don't pick themself
pick_order.each do |participant|

  while participant.buys_for == nil
    pick =  hat[rand(hat.length)] # could use hat.sample instead, the sample method randomly picks from an array.
    puts "#{participant.name} picks #{pick.name}"
    unless pick == participant
      participant.buys_for = pick
      hat.delete(pick)
    end
  end

end