class Server < ApplicationRecord
  belongs_to :user
  belongs_to :server_template

  enum :status, { stopped: 0, starting: 1, running: 2, failed: 3 }

  validates :name, presence: true
  validates :name, uniqueness: { scope: :user_id }
  validates :port, presence: true, uniqueness: true, numericality: { only_integer: true, greater_than_or_equal_to: 27016, less_than_or_equal_to: 27999 }
  validates :status, presence: true

  before_validation :assign_port, if: -> { port.blank? }

  scope :for_user, ->(user) { where(user_id: user.id) }
  scope :active, -> { where(status: [ :starting, :running ]) }

  after_destroy :cleanup_server

  def self.next_available_port
    (27016..27999).each do |port|
      return port unless exists?(port: port)
    end
    nil
  end

  private

  def assign_port
    self.port = self.class.next_available_port
  end

  def cleanup_server
    L4dServer::SystemdManager.cleanup(self)
    L4dServer::Launcher.cleanup(self)
  end
end