import pygame, sys, random 

class Crosshair(pygame.sprite.Sprite):
    def __init__(self, picture_path):
        super().__init__()
        self.image = pygame.image.load(picture_path)
        self.rect = self.image.get_rect()
        self.gunshot = pygame.mixer.Sound("gunshot.mp3") 
    def shoot(self):
        self.gunshot.play()
        pygame.sprite.spritecollide(crosshair, target_group, True)
    def update(self): 
        self.rect.center = pygame.mouse.get_pos()

class Target(pygame.sprite.Sprite):
    def __init__(self, picture_path, pos_x, pos_y) :
        super().__init__()
        self.image = pygame.image.load(picture_path)
        self.rect = self.image.get_rect()
        self.rect.center = [pos_x,pos_y]



pygame.init()
clock = pygame.time.Clock()


screen_width = 1920
screen_height = 1080
screen = pygame.display.set_mode((screen_width,screen_height))
background = pygame.image.load("bg_green.png")
pygame.mouse.set_visible(False)

crosshair = Crosshair("crosshair_blue_small.png")
crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)

target_group = pygame.sprite.Group()
for target in range(50000):
    new_target = Target("target.png", random.randrange(0,screen_width), random.randrange(0,screen_height))
    target_group.add(new_target)

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.MOUSEBUTTONDOWN:
            crosshair.shoot()

    pygame.display.flip()
    screen.blit(background, (0,0))
    target_group.draw(screen)
    crosshair_group.draw(screen)
    crosshair_group.update()
    clock.tick(60)