import pygame, sys, random

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

class GameState():
    def __init__(self):
        self.state = 'intro'

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

        # Drawing
        screen.blit(background,(0,0))
        screen.blit(ready_text,(screen_width/2 -113,screen_height/2 -33))
        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()

        # Drawing
        screen.blit(background,(0,0))
        target_group.draw(screen)
        crosshair_group.draw(screen)
        crosshair_group.update()        

        pygame.display.flip()

    def state_manager(self):
        if self.state == "intro":
            self.intro()
        if self.state == "main_game":
            self.main_game()

        

# General Setup
pygame.init()
clock = pygame.time.Clock()
game_state = GameState()

#screen
screen_width = 1280
screen_height = 720
screen = pygame.display.set_mode((screen_width,screen_height))
pygame.display.set_caption("Sprites")
background = pygame.image.load("BG.png")
ready_text = pygame.image.load("ready_text.png")
pygame.mouse.set_visible(False)

crosshair = Crosshair("crosshair.png", screen_width // 2, screen_height // 2)
crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)

target_group = pygame.sprite.Group()
for target in range(20):
    new_target = Target("target.png",random.randrange(0,screen_width), random.randrange(0,screen_height))
    target_group.add(new_target)

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