from typing import Optional

from hopper.engine import GameEngine, GameEngineFactory
from hopper.ws_server import WSServer
from settings import settings

game_engine: Optional[GameEngine] = None


def create_game_engine() -> GameEngine:
    global game_engine

    if game_engine:
        raise RuntimeError("Can't call create_game_engine() more than once!")

    ws_server = WSServer(
        host=settings.ws_server.HOST,
        port=settings.ws_server.PORT,
    )
    ws_server.start()

    game_engine = GameEngineFactory.create_default(ws_server=ws_server)

    return game_engine


def get_game_engine() -> GameEngine:
    return game_engine