import sys
import pygame
import game_functions as gf
from settings import Settings
from ship import Ship
from pygame.sprite import Group
from alien import Alien
from game_stats import GameStats
from button import Button
from scoreboard import Scoreboard

def run_game():
    #初始化pygame、设置和屏幕对象
    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Play按键
    play_button = Button(ai_settings,screen,"Play")
    #创建一个用于存储游戏统计信息的实例,并创建记分牌
    stats = GameStats(ai_settings)
    sb = Scoreboard(ai_settings,screen,stats)
    #创建一艘飞船
    ship = Ship(ai_settings,screen)
    #创建一个外星人编组
    aliens = Group()
    #创建外星人群
    gf.create_fleet(ai_settings,screen,ship,aliens)
    #创建一个用于储存子弹的编组
    bullets = Group()
    #设置背景色
    bg_color = (230,230,230)
    #锁帧
    clock = pygame.time.Clock()
    #开始主循环
    while True:
        gf.check_events(ai_settings,screen,stats,play_button,ship,aliens,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,stats,sb,ship,aliens,bullets,play_button)
        clock.tick(250)
      
        
        
run_game()
