require "async"
require "async/websocket"

module GameServer
  module Server
    class WebSocketServer
      def initialize(world)
        @world = world
      end

      def start
        Async do |task|
          task.async { simulation_loop }

          Async::WebSocket::Server.open("0.0.0.0", Settings::PORT) do |ws|
            task.async { Connection.new(ws, @world).run }
          end
        end
      end

      def simulation_loop
        last = Time.now
        loop do
          now = Time.now
          delta = (now - last) * Settings::GAME_SPEED
          @world.advance(delta)
          last = now
          sleep Settings::SIMULATION_STEP
        end
      end
    end
  end
end