import sys

import pygame
from pygame.sprite import Group
from settings import Settings
from ship import Ship
from alien import Alien
import game_functions as gf
from game_stats import GameStats

def run_game():
    #初始化游戏并创建一个屏幕对象
    pygame.init()
    ai_settings=Settings()
    screen=pygame.display.set_mode(
        (ai_settings.screen_width, ai_settings.screen_height))
    pygame.display.set_caption("Alien Invasion")

    # 创建一个用于存储游戏统计信息的实例
    stats = GameStats(ai_settings)
    #创建一艘飞船
    ship=Ship(ai_settings,screen)
    #创建一个用于存储子弹的编组
    bullets = Group()

    # #创建一个外星人
    # alien = Alien(ai_settings, screen)
    aliens = Group()

    # #创建外星人群
    gf.create_fleet(ai_settings, screen, ship, aliens)


    #开始游戏的主循环
    while True:  
        #监视键盘和鼠标事件
        gf.check_events(ai_settings,screen,ship,bullets)
        if stats.game_active:
            ship.update()
            gf.update_bullets(ai_settings, screen, ship, aliens, bullets)
            gf.update_aliens(ai_settings, stats, screen, ship, aliens, bullets)
            gf.update_screen(ai_settings, screen, ship, aliens, bullets)  ##
        
        
        #每次循环时都重绘屏幕
        gf.update_screen(ai_settings,screen,ship,aliens, bullets)  ##

run_game()