import random
import curses

s = curses.initscr()
curses.curs_set(0)
sh , sw = getmaxyx()
w = curses.newln(sh, sw, 0, 0)
w.keypad(1)
w.timeout(100)

snk_x = sw/4
snk_y = sh/2
snake = [
    [snk_y, snk_x],
    [snk_y,snk_x - 1],
    [snk_y, snk_x - 2]

]

print("here catch up 1")

food = [sh/2, sw/2]
w.addch(food[0],food[1], curses.ACS_PI)

key = curses.KEY_RIGHT

while True:
    next_key = w.getch()
    key = key if next_key == -1 else next_key

    if snake[0][0] in [0, sh] or snake[[0][1] in [0, sw] or snake[0] in snake[1:]:
        curses.endwin()
        quit()

    new_head = [snake[0][0],snake[0][1]]

    if key == curses.KEY_DOWN:
        new_head[0] += 1

    if key == curses.KEY_UP:
        new_head[0] -= 1

    if key == curses.KEY_LEFT:
        new_head[0] -= 1

    if key == curses.KEY_RIGHT:
        new_head[0] += 1

    if snake[0] == food:
        food = None
        while food is None:
        nf = [
            random.randint(1, sh-1),
            random.randint(1, sw-1)
        ]

        food = nf if nf not in snake else None
        w.addch(food[0], food[1], curses.ACS_PI)
    else:
        tail = snake.pop()
        w.addch(tail[0], tail[1], ' ')

    w.addch(snake[0][0], snake[0][1], curses.ACS_CKBOARD)