# The game class
class Game < ActiveRecord::Base
  has_many :players, dependent: :destroy
  has_many :users, through: :players
  has_many :player_cards, through: :players
  accepts_nested_attributes_for :players
  validates :title, presence: true

  def start
    validate_startable
    return false unless startable?

    # Start the game
    self.status = 'Game Started'

    # Create a deck
    d = Deck.new
    # Shuffle the deck
    d.cards.shuffle!
    # Deal the cards
    players.each do |player|
      13.times do 
        card = d.cards.shift
        player.player_cards.new(card.instance_values)
      end
      player.save
    end
    save
  end

  def validate_startable
    @player_count = players.count
    errors[:players] = 'Must be at least 2 players.'  if @player_count < 2
    errors[:players] = 'Must be less than 5 players.'  if @player_count > 4
    errors[:status]  = 'Game already started...' if self.status == 'Game Started'
    raise StandardError, errors if errors
  end

  def startable?
    @player_count = players.count
    tests = [
      @player_count.between?(2, 4),
      status != 'Game Started'
    ]
    return tests.all?
  end

  def lowest_card
    self.player_cards.order(:value).first
  end

  def add_player_from_user(user)
    return false unless can_accomodate(user)
    self.players.create(user: user)
  end

  def can_accomodate(user)
    !(already_has?(user) || full?)
  end

  def already_has?(user)
    users.include?(user)
  end

  def full?
    players.count >= 4
  end
end