from turtle import *
from random import randrange
from freegames import square, vector

import time
import board
import busio
import adafruit_mpr121

i2c = busio.I2C(board.SCL, board.SDA)
mpr121 = adafruit_mpr121.MPR121(i2c)

food = vector(0, 0)
snake = [vector(10, 0)]
aim = vector(0, -10)

def change(x, y):
    "Change snake direction."
    aim.x = x
    aim.y = y

def inside(head):
    "Return True if head inside boundaries."
    return -200 < head.x < 190 and -200 < head.y < 190

def move():

    "Move snake forward one segment."
    head = snake[-1].copy()
    head.move(aim)

    if not inside(head) or head in snake:
        square(head.x, head.y, 9, 'red')
        update()
        return

    snake.append(head)

    if head == food:
        print('Snake:', len(snake))
        food.x = randrange(-15, 15) * 10
        food.y = randrange(-15, 15) * 10
    else:
        snake.pop(0)

    clear()

    for body in snake:
        square(body.x, body.y, 9, 'black')

    square(food.x, food.y, 9, 'green')
    update()


setup(420, 420, 370, 0)
hideturtle()
tracer(False)



while True:

    # Loop through all 12 inputs (0-11).
    for i in range(12):
        # Call is_touched and pass it then number of the input.  If it's touched
        # it will return True, otherwise it will return False.
        if mpr121[i].value:
            if i == 5:
                change(10, 0)
            elif i == 6:
                change(-10, 0)
            elif i == 0:
                change(0, 10)
            elif i == 9:
                change(0, -10)

    time.sleep(0.2)
    move()



done()