import pygame
import sys
import 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]


class Gamestate():
    def __init__(self):
        self.state = 'main_game'

    def intro(self):
         for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                crosshair.shoot()

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

    def main_game(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                crosshair.shoot()

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

# general setup
pygame.init()
clock = pygame.time.Clock()
game_state = Gamestate()

# game screen
screen_width = 1600
screen_height = 900
screen = pygame.display.set_mode((screen_width, screen_height))
background = pygame.image.load("images/bg_blue.png")
pygame.mouse.set_visible(False)

# targets
target_group = pygame.sprite.Group()
for _ in range(20):
    new_target = Target("images/target_red2.png", random.randrange(0, screen_width), random.randrange(0, screen_height))
    target_group.add(new_target)

# crosshair
crosshair = Crosshair("images/crosshair_red_large.png")
crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)

while True:
    game_state.main_game()
    clock.tick(60)