script.js

document.addEventListener('DOMContentLoaded', () => {
    const form = document.getElementById('nutriplan-form');
    if (!form) return;

    const pricePerDayEl = document.getElementById('price-per-day');
    const totalPriceEl = document.getElementById('total-price');

    // --- CONFIGURATION ---
    const BASE_PRICE_PER_DAY = 1000;

    const calculateAndDisplayPrice = () => {
        // --- GATHER DATA ---
        const formData = new FormData(form);

        const caloriesValue = form.querySelector('input[name="calories"]:checked').value;
        const calorieModifier = parseInt(form.querySelector('input[name="calories"]:checked').dataset.modifier, 10);

        const mealsValue = form.querySelector('input[name="meals"]:checked').value;
        const mealsModifier = parseInt(form.querySelector('input[name="meals"]:checked').dataset.modifier, 10);

        const durationInDays = parseInt(form.querySelector('input[name="duration"]:checked').value, 10);

        let totalExtras = 0;
        const extraOptions = [];
        form.querySelectorAll('input[name="extras"]:checked').forEach(el => {
            totalExtras += parseInt(el.dataset.modifier, 10);
            extraOptions.push(el.value);
        });

        // --- CALCULATE PRICE ---
        const pricePerDay = BASE_PRICE_PER_DAY + calorieModifier + mealsModifier;
        const totalPrice = (pricePerDay * durationInDays) + totalExtras;

        // --- DISPLAY PRICE ---
        pricePerDayEl.textContent = `${pricePerDay} ₽`;
        totalPriceEl.textContent = `${totalPrice} ₽`;

        return {
            calories: caloriesValue,
            meals: mealsValue,
            duration: durationInDays,
            extras: extraOptions,
            pricePerDay: pricePerDay,
            totalPrice: totalPrice
        };
    };

    // --- EVENT LISTENERS ---
    form.addEventListener('change', calculateAndDisplayPrice);

    form.addEventListener('submit', (e) => {
        e.preventDefault();
        const finalSelection = calculateAndDisplayPrice();
        console.log("--- NutriPlan Order ---");
        console.log(JSON.stringify(finalSelection, null, 2));
        alert('Заказ оформлен! Проверьте детали в консоли разработчика.');
    });

    // --- INITIAL CALCULATION ---
    calculateAndDisplayPrice();
});