import pygame


class Game:
    """Basic Pygame game loop.

    Subclasses **must** implement:
    * ``update_game`` – update state, return ``False`` to quit.
    * ``draw_game``  – render to the screen.
    """

    def __init__(self, title: str, fps: int, size: tuple[int, int]):
        pygame.init()
        self.screen = pygame.display.set_mode(size)
        pygame.display.set_caption(title)
        self.clock = pygame.time.Clock()
        self.fps = fps
        self.size = size

    def run(self) -> None:
        running = True
        while running:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    running = False
            running = self.update_game()
            self.draw_game()
            pygame.display.flip()
            self.clock.tick(self.fps)
        pygame.quit()

    def update_game(self) -> bool:
        raise NotImplementedError

    def draw_game(self) -> None:
        raise NotImplementedError