import numpy as np
import curses
import time
import random


def main(stdscr):
    curses.curs_set(0)  # Hide the cursor for a cleaner look
    stdscr.nodelay(True)  # Non-blocking input to keep the game flowing
    h, w = 20, 40  # Dimensions of the game board
    board = np.zeros((h, w), dtype=int)  # Game board initialization
    snake = [(h // 2, w // 2)]  # Starting position of the snake
    board[h // 2, w // 2] = 1  # Mark the snake's start on the board
    food = (random.randint(0, h - 1), random.randint(0, w - 1))
    board[food] = 2  # Place initial food
    direction = (0, 1)  # Initial movement direction
    last_update_time = time.time()
    move_interval = 0.1  # Base move interval in seconds
    vertical_adjustment = 2  # Vertical moves occur every this number of base intervals

    while True:
        key = stdscr.getch()
        if key in [ord("Q"), ord("q")]:
            break
        if key in [ord("a"), ord("A")] and direction != (0, 1):
            direction = (0, -1)
        if key in [ord("d"), ord("D")] and direction != (0, -1):
            direction = (0, 1)
        if key in [ord("w"), ord("W")] and direction != (1, 0):
            direction = (-1, 0)
        if key in [ord("s"), ord("S")] and direction != (-1, 0):
            direction = (1, 0)

        current_time = time.time()
        time_elapsed = current_time - last_update_time

        # Adjust move interval based on direction
        current_interval = move_interval * (
            vertical_adjustment if direction in [(-1, 0), (1, 0)] else 1
        )

        if time_elapsed >= current_interval:
            new_head = (snake[0][0] + direction[0], snake[0][1] + direction[1])
            new_head = (new_head[0] % h, new_head[1] % w)  # Toroidal field logic

            if new_head in snake:
                break  # Collision detection

            snake.insert(0, new_head)
            if new_head == food:
                food = (random.randint(0, h - 1), random.randint(0, w - 1))
                while food in snake:
                    food = (random.randint(0, h - 1), random.randint(0, w - 1))
            else:
                tail = snake.pop()
                board[tail] = 0

            board[new_head] = 1
            board[food] = 2
            last_update_time = current_time  # Reset the timer

            # Clear and redraw the board
            stdscr.clear()
            for i in range(h):
                for j in range(w):
                    if board[i, j] == 1:
                        stdscr.addch(i, j, "X")
                    elif board[i, j] == 2:
                        stdscr.addch(i, j, "O")
                    else:
                        stdscr.addch(i, j, " ")

            stdscr.refresh()


curses.wrapper(main)