import pygame
import random
import time
from classes import Apple
from classes import Snake
from classes import Direction
SCREEN_WIDTH=800
SCREEN_HEIGHT=608
background=pygame.Surface((SCREEN_WIDTH,SCREEN_HEIGHT))
for i in range(0,25):
    for j in range(0,19):
        image=pygame.image.load('images/background.png')
        mask=(random.randrange(0,20), random.randrange(0,20), random.randrange(0,20))
        image.fill(mask, special_flags=pygame.BLEND_ADD)
        background.blit(image, (i*32,j*32))
pygame.init()
display=pygame.display.set_mode((SCREEN_WIDTH,SCREEN_HEIGHT))
clock=pygame.time.Clock()
snake=Snake()
MOVE_SNAKE=pygame.USEREVENT +1
pygame.time.set_timer(MOVE_SNAKE,200)   
apple=Apple()
apples = pygame.sprite.Group()
apples.add(apple)
game=True
while game:
    for event in pygame.event.get():
        if event.type==pygame.KEYDOWN:
            if event.key==pygame.K_w:
                snake.change_direction(Direction.UP)
            if event.key==pygame.K_s:
                snake.change_direction(Direction.DOWN)
            if event.key==pygame.K_a:
                snake.change_direction(Direction.LEFT)
            if event.key==pygame.K_d:
                snake.change_direction(Direction.RIGHT)
        if event.type==pygame.USEREVENT+1:
            snake.update()
        if event.type==pygame.QUIT:
            game=False

    display.blit(background,(0,0))
    display.blit(snake.image,snake.rect)
    for apple in apples:
        display.blit(apple.image,apple.rect)
    pygame.display.flip()
    clock.tick(30)
pygame.quit()