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import pygame
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import sys
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import random
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# Game constants
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WIDTH, HEIGHT = 800, 600
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BLOCK_SIZE = 20
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SPEED = 5
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WHITE = (255, 255, 255)
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RED = (255, 0, 0)
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GREEN = (0, 255, 0)
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BLACK = (0, 0, 0)
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# Initialize Pygame
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pygame.init()
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# Set up the display
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screen = pygame.display.set_mode((WIDTH, HEIGHT))
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pygame.display.set_caption("Snake Game")
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class Snake:
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    def __init__(self):
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        self.x = WIDTH // 2
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        self.y = HEIGHT // 2
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        self.length = 1
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        self.direction = "right"
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        self.body = [(self.x, self.y)]
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    def move(self):
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        if self.direction == "right":
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            self.x += BLOCK_SIZE
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        elif self.direction == "left":
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            self.x -= BLOCK_SIZE
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        elif self.direction == "up":
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            self.y -= BLOCK_SIZE
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        elif self.direction == "down":
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            self.y += BLOCK_SIZE
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        self.body.append((self.x, self.y))
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        if len(self.body) > self.length:
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            self.body.pop(0)
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    def draw(self):
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        for pos in self.body:
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            pygame.draw.rect(screen, GREEN, (pos[0], pos[1], BLOCK_SIZE, BLOCK_SIZE))
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class Food:
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    def __init__(self):
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        self.x = random.randint(0, WIDTH - BLOCK_SIZE) // BLOCK_SIZE * BLOCK_SIZE
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        self.y = random.randint(0, HEIGHT - BLOCK_SIZE) // BLOCK_SIZE * BLOCK_SIZE
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    def draw(self):
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        pygame.draw.rect(screen, RED, (self.x, self.y, BLOCK_SIZE, BLOCK_SIZE))
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def main():
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    clock = pygame.time.Clock()
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    snake = Snake()
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    food = Food()
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    game_over = False
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    last_time = pygame.time.get_ticks()
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    while not game_over:
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        try:
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            for event in pygame.event.get():
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                if event.type == pygame.QUIT:
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                    pygame.quit()
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                    sys.exit()
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                elif event.type == pygame.KEYDOWN:
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                    if event.key == pygame.K_UP and snake.direction!= "down":
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                        snake.direction = "up"
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                    elif event.key == pygame.K_DOWN and snake.direction!= "up":
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                        snake.direction = "down"
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                    elif event.key == pygame.K_LEFT and snake.direction!= "right":
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                        snake.direction = "left"
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                    elif event.key == pygame.K_RIGHT and snake.direction!= "left":
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                        snake.direction = "right"
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            current_time = pygame.time.get_ticks()
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            if current_time - last_time >= 1000 // SPEED:
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                print("Moving snake...")
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                snake.move()
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                if (snake.x, snake.y) in snake.body[:-1]:
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                    print("Game over: snake collided with itself")
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                    game_over = True
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                if (snake.x, snake.y) == (food.x, food.y):
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                    print("Snake ate food!")
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                    snake.length += 1
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                    food = Food()
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                last_time = current_time
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            screen.fill(BLACK)
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            snake.draw()
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            food.draw()
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            pygame.display.update()
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        except Exception as e:
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            print(f"Error: {e}")
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            game_over = True
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    print("Game Over")
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    pygame.quit()
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    sys.exit()
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if __name__ == "__main__":
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    main()