from __future__ import annotations
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from alien_invasion import AlienInvasion

class GameStats:
    """Track statistics for Alien Invasion."""

    def __init__(self, ai_game: 'AlienInvasion') -> None:
        """Initialize statistics."""
        self.settings = ai_game.settings
        self.reset_stats()
        self.high_score = 0

    def reset_stats(self) -> None:
        """Initialize statistics that can change during the game."""
        self.ships_left = self.settings.ship_limit
        self.score = 0
        self.level = 1