import pygame
import sys
import os
import random

# Initialize Pygame
pygame.init()

# Screen dimensions
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600

# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)

# Fonts
FONT = pygame.font.Font(None, 36)

# High score file
HIGH_SCORE_FILE = "high_score.txt"

def load_high_score():
    """Load the high score from a file, if it exists. Return 0 if there is an error or the file doesn't exist."""
    if os.path.exists(HIGH_SCORE_FILE):
        with open(HIGH_SCORE_FILE, 'r') as file:
            try:
                return int(file.read().strip())
            except ValueError:
                return 0
    return 0

def save_high_score(high_score):
    """Save the current high score to a file."""
    with open(HIGH_SCORE_FILE, 'w') as file:
        file.write(str(high_score))

# Initial score and high score
score = 0
high_score = load_high_score()  # Load the high score from the file at the start

# Set up the display
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('High Score Example')

# Coin class
class Coin(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((20, 20))
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.x = random.randint(0, SCREEN_WIDTH - self.rect.width)
        self.rect.y = random.randint(0, SCREEN_HEIGHT - self.rect.height)

    def update(self):
        pass

# Player class
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((50, 50))
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.center = (SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2)

    def update(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
            self.rect.x -= 5
        if keys[pygame.K_RIGHT]:
            self.rect.x += 5
        if keys[pygame.K_UP]:
            self.rect.y -= 5
        if keys[pygame.K_DOWN]:
            self.rect.y += 5

# Sprite groups
all_sprites = pygame.sprite.Group()
coins = pygame.sprite.Group()

player = Player()
all_sprites.add(player)

# Create and add coins to the game
for _ in range(10):
    coin = Coin()
    all_sprites.add(coin)
    coins.add(coin)

# Main game loop
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            print("QUIT event received. Exiting the game loop.")
            running = False

    # Update all sprites
    all_sprites.update()

    # Check for coin collection
    coins_collected = pygame.sprite.spritecollide(player, coins, True)
    if coins_collected:
        score += len(coins_collected)  # Increase the score by the number of coins collected
        if score > high_score:  # Check if the current score is higher than the high score
            high_score = score  # Update the high score
            save_high_score(high_score)  # Save the new high score to the file
        print(f"Collected {len(coins_collected)} coins. Score: {score}. High Score: {high_score}")

    # Draw everything on the screen
    screen.fill(BLACK)
    all_sprites.draw(screen)

    # Draw the current score
    score_text = FONT.render(f"Score: {score}", True, WHITE)
    screen.blit(score_text, (10, 10))

    # Draw the high score
    high_score_text = FONT.render(f"High Score: {high_score}", True, WHITE)
    screen.blit(high_score_text, (10, 50))

    # Flip the display to update the screen
    pygame.display.flip()

    # Cap the frame rate to 60 frames per second
    pygame.time.Clock().tick(60)

# Quit Pygame and exit the script
pygame.quit()
sys.exit()