snake-game.py

import pygame
import time
import random

# Initialize pygame
pygame.init()

# Define colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (213, 50, 80)
GREEN = (0, 255, 0)
BLUE = (50, 153, 213)
DARK_GREEN = (0, 155, 0)

# Screen size
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 400

# Snake settings
SNAKE_BLOCK = 10
SNAKE_SPEED = 15

# Fonts
font_style = pygame.font.SysFont("bahnschrift", 25)
score_font = pygame.font.SysFont("comicsansms", 35)

# Game window
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('Snake Game')

# Button class for Start, Restart, Finish
class Button:
    def __init__(self, x, y, w, h, text, color, hover_color, action=None):
        self.rect = pygame.Rect(x, y, w, h)
        self.text = text
        self.color = color
        self.hover_color = hover_color
        self.action = action

    def draw(self):
        mouse = pygame.mouse.get_pos()
        click = pygame.mouse.get_pressed()

        if self.rect.collidepoint(mouse):
            pygame.draw.rect(screen, self.hover_color, self.rect)
            if click[0] == 1 and self.action:
                self.action()
        else:
            pygame.draw.rect(screen, self.color, self.rect)

        # Display button text
        text_surf = font_style.render(self.text, True, WHITE)
        screen.blit(text_surf, (self.rect.x + (self.rect.width - text_surf.get_width()) // 2,
                                self.rect.y + (self.rect.height - text_surf.get_height()) // 2))


# Function to display score
def your_score(score):
    value = score_font.render(f"Your Score: {score}", True, WHITE)
    screen.blit(value, [0, 0])

# Function to draw snake with a rounded or segmented look
def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.circle(screen, GREEN, (x[0] + snake_block // 2, x[1] + snake_block // 2), snake_block // 2)

# Function to display a message
def message(msg, color):
    mesg = font_style.render(msg, True, color)
    screen.blit(mesg, [SCREEN_WIDTH / 6, SCREEN_HEIGHT / 3])

# Function to handle the game loop
def game_loop():
    game_over = False
    game_close = False

    # Initial position of the snake
    x1 = SCREEN_WIDTH / 2
    y1 = SCREEN_HEIGHT / 2

    # Movement
    x1_change = 0
    y1_change = 0

    # Snake body
    snake_list = []
    length_of_snake = 1

    # Food
    foodx = round(random.randrange(0, SCREEN_WIDTH - SNAKE_BLOCK) / 10.0) * 10.0
    foody = round(random.randrange(0, SCREEN_HEIGHT - SNAKE_BLOCK) / 10.0) * 10.0

    # Clock for controlling the speed
    clock = pygame.time.Clock()

    while not game_over:

        while game_close:
            screen.fill(BLUE)
            message("You Lost! Press R-Restart or Q-Quit", RED)
            your_score(length_of_snake - 1)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_r:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -SNAKE_BLOCK
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = SNAKE_BLOCK
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -SNAKE_BLOCK
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = SNAKE_BLOCK
                    x1_change = 0

        if x1 >= SCREEN_WIDTH or x1 < 0 or y1 >= SCREEN_HEIGHT or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        screen.fill(BLUE)

        # Draw food
        pygame.draw.rect(screen, RED, [foodx, foody, SNAKE_BLOCK, SNAKE_BLOCK])

        # Snake movement
        snake_head = [x1, y1]
        snake_list.append(snake_head)
        if len(snake_list) > length_of_snake:
            del snake_list[0]

        for x in snake_list[:-1]:
            if x == snake_head:
                game_close = True

        our_snake(SNAKE_BLOCK, snake_list)
        your_score(length_of_snake - 1)

        pygame.display.update()

        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, SCREEN_WIDTH - SNAKE_BLOCK) / 10.0) * 10.0
            foody = round(random.randrange(0, SCREEN_HEIGHT - SNAKE_BLOCK) / 10.0) * 10.0
            length_of_snake += 1

        clock.tick(SNAKE_SPEED)

    pygame.quit()
    quit()

# Button actions
def start_game():
    game_loop()

def quit_game():
    pygame.quit()
    quit()

# Main menu
def main_menu():
    screen.fill(BLUE)
    start_button = Button(200, 150, 200, 50, "Start", DARK_GREEN, GREEN, start_game)
    quit_button = Button(200, 250, 200, 50, "Quit", RED, DARK_GREEN, quit_game)

    running = True
    while running:
        screen.fill(BLUE)
        start_button.draw()
        quit_button.draw()
        pygame.display.update()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False

    pygame.quit()

if __name__ == "__main__":
    main_menu()