import pygame

pygame.init()

# 设置游戏窗口大小
screen_width = 480
screen_height = 700
screen = pygame.display.set_mode((screen_width, screen_height))

# 设置游戏标题
pygame.display.set_caption("打飞机游戏")

# 加载游戏背景图片
bg_img = pygame.image.load("background.png")

# 设置玩家飞机
player_img = pygame.image.load("player.png")
player_rect = player_img.get_rect()  # 矩形大小和位置
player_rect.centerx = screen_width // 2  # 初始位置为屏幕中央
player_rect.bottom = screen_height - 20  # 初始位置在底部
player_speed = 5  # 飞机移动速度

# 设置敌方飞机
enemy_img = pygame.image.load("enemy.png")
enemy_rect = enemy_img.get_rect()
# TODO：随机生成敌机位置

# 设置子弹
bullet_img = pygame.image.load("bullet.png")
bullet_rect = bullet_img.get_rect()
bullet_rect.centery = player_rect.top  # 子弹发射位置在飞机顶部
bullet_speed = 10  # 子弹射速

# 游戏循环
while True:
    # 监听游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:  # 关闭游戏窗口
            pygame.quit()
            sys.exit()

    # 玩家移动
    keys_pressed = pygame.key.get_pressed()
    if keys_pressed[pygame.K_LEFT]:
        player_rect.x -= player_speed
    if keys_pressed[pygame.K_RIGHT]:
        player_rect.x += player_speed

    # 子弹发射
    keys_pressed = pygame.key.get_pressed()
    if keys_pressed[pygame.K_SPACE]:
        pass  # TODO：发射子弹

    # 敌方飞机移动

    # 碰撞检测

    # 绘制游戏界面
    screen.blit(bg_img, (0, 0))
    screen.blit(player_img, player_rect)
    screen.blit(enemy_img, enemy_rect)
    screen.blit(bullet_img, bullet_rect)

    # 刷新游戏界面
    pygame.display.update()