import pygame
import random

pygame.init()

WIDTH, HEIGHT = 600, 400
screen = pygame.display.set_mode((WIDTH, HEIGHT))
clock = pygame.time.Clock()

colors = {
    "black": (0, 0, 0),
    "white": (255, 255, 255),
    "red": (213, 50, 80),
    "green": (0, 255, 0),
    "blue": (50, 153, 213)
}

snake_block = 10
snake_speed = 15

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


def our_snake(snake_block, snake_List):
    for x in snake_List:
        pygame.draw.rect(screen, colors["green"], [x[0], x[1], snake_block, snake_block])


def message(msg, color):
    mesg = font_style.render(msg, True, color)
    screen.blit(mesg, [WIDTH / 6, HEIGHT / 3])


def gameLoop():
    game_over = False
    game_close = False

    x1 = WIDTH / 2
    y1 = HEIGHT / 2
    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, WIDTH - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, HEIGHT - snake_block) / 10.0) * 10.0

    while not game_over:

        while game_close:
            screen.fill(colors["blue"])
            message("You Lost! Press Q-Quit or C-Play Again", colors["red"])
            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_c:
                        gameLoop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if 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 >= WIDTH or x1 < 0 or y1 >= HEIGHT or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        screen.fill(colors["blue"])
        pygame.draw.rect(screen, colors["red"], [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(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)

        pygame.display.update()

        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, WIDTH - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, HEIGHT - snake_block) / 10.0) * 10.0
            Length_of_snake += 1

        clock.tick(snake_speed)

    pygame.quit()
    quit()


gameLoop()