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(self, 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 = "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"

        for y in range(num_tiles_y):
            for x in range(num_tiles_x):
                screen.blit(background, (x * background.get_width(), y * background.get_height()))

        screen.blit(ready_text, (screen_width/2 - 480, screen_height/2 - 135))
        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 and event.button == 1:
                crosshair.shoot()

        for y in range(num_tiles_y):
            for x in range(num_tiles_x):
                screen.blit(background, (x * background.get_width(), y * background.get_height()))


            
            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()
        elif self.state == "main_game":
            self.main_game()

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

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

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

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

num_tiles_x = (screen_width // background.get_width()) + 1
num_tiles_y = (screen_height // background.get_height()) + 1

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