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// food.js

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

let food = getRandomFoodPosition();
const EXPANSION_RATE = 1;
let score = 0;

export function update(snake) {
    const head = getSnakeHead(snake);
    if (onSnake(food, { ignoreHead: true })) {
        expandSnake(EXPANSION_RATE);
        food = getRandomFoodPosition(snake);
        score += 10;
    }

    if (head && head.x === food.x && head.y === food.y) {
        expandSnake(1);
        food = getRandomFoodPosition(snake);
        score += 10;
    }
}

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);
}

export function getScore() {
    return score;
}

function getRandomFoodPosition(snake) {
    let newFoodPosition;
    while (newFoodPosition == null || onSnake(newFoodPosition, { ignoreHead: true, snake })) {
        newFoodPosition = {
            x: Math.floor(Math.random() * 21) + 1,
            y: Math.floor(Math.random() * 21) + 1,
        };
    }
    return newFoodPosition;
}

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