food.js

import { onSnake, expandSnake } from './snake.js';
import { randomGridPosition } from './grid.js';

let food = getRandomFoodPosition();
const EXPANSION_RATE = 1;
let level = 0;
export let SNAKE_SPEED = 2;

export function update () {
    if (onSnake(food)) {
        expandSnake(EXPANSION_RATE);
        food = getRandomFoodPosition();
        level++;
        if (level % 5 === 0) {
            SNAKE_SPEED += 2;
        }   
    }
}

export function draw(gameBoard) {
    const foodElement = document.createElement('div');
    foodElement.style.gridRowStart = food.y;  
    foodElement.style.gridColumnStart = food.x;
    foodElement.classList.add('food');
    gameBoard.appendChild(foodElement);
}

function getRandomFoodPosition () {
    let newFoodPosition;

    while (newFoodPosition == null ||onSnake(newFoodPosition)) {
        newFoodPosition = randomGridPosition();
    }
    return newFoodPosition;
}