function formatRub(value) {
  return new Intl.NumberFormat("ru-RU").format(Math.round(value));
}

function formatRubShort(value) {
  const abs = Math.abs(value);
  if (abs >= 1000000) {
    return `${(value / 1000000).toFixed(1)} млн ₽`;
  }
  return `${formatRub(value)} ₽`;
}

function buildFooterSocialLinksMarkup() {
  return `
    <div data-footer-socials style="display:flex;align-items:center;gap:12px;margin-top:12px;">
      <a href="https://t.me/ozimayarf" target="_blank" rel="noopener noreferrer" aria-label="Telegram" title="Telegram" style="display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9999px;background:linear-gradient(135deg,#2aabee,#1d8fd8);color:#ffffff;text-decoration:none;">
        <svg viewBox="0 0 24 24" aria-hidden="true" style="width:14px;height:14px;"><path d="M21.944 4.507a1.5 1.5 0 0 0-1.806-1.87L2.86 8.03A1.5 1.5 0 0 0 2.8 10.9l4.212 1.39 1.58 5.066a1.5 1.5 0 0 0 2.553.612l2.35-2.43 4.486 3.286a1.5 1.5 0 0 0 2.36-.91l1.603-13.407Z" fill="currentColor"/></svg>
      </a>
      <a href="https://vk.ru/club237700326" target="_blank" rel="noopener noreferrer" aria-label="VK" title="VK" style="display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9999px;background:linear-gradient(135deg,#2787f5,#1565d8);color:#ffffff;text-decoration:none;">
        <svg viewBox="0 0 24 24" aria-hidden="true" style="width:16px;height:16px;"><path d="M4.29 7.33c.12 5.73 3.03 9.17 8.14 9.17h.3V13.2c1.84.2 3.24 1.55 3.8 3.3h2.6c-.72-2.63-2.63-4.08-3.82-4.63 1.19-.69 2.86-2.36 3.26-4.54h-2.36c-.53 1.77-2.06 3.44-3.48 3.59V7.33h-2.36v6.3c-1.43-.36-3.24-2.16-3.32-6.3H4.29Z" fill="currentColor"/></svg>
      </a>
      <a href="https://max.ru/join/GzH05TibcROmkwcfGdk-onV0sfNtVJRXXklt8zl_uLM" target="_blank" rel="noopener noreferrer" aria-label="Max" title="Max" style="display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9999px;background:linear-gradient(45deg,#2b61ec,#763ded);color:#ffffff;text-decoration:none;">
        <svg viewBox="0 0 720 720" aria-hidden="true" style="width:14px;height:14px;"><path d="M350.4 9.6C141.8 20.5 4.1 184.1 12.8 390.4c3.8 90.3 40.1 168 48.7 253.7 2.2 22.2-4.2 49.6 21.4 59.3 31.5 11.9 79.8-8.1 106.2-26.4 9-6.1 17.6-13.2 24.2-22 27.3 18.1 53.2 35.6 85.7 43.4 143.1 34.3 299.9-44.2 369.6-170.3C799.6 291.2 622.5-4.6 350.4 9.6m-81 494.4c-11.3 8.8-22.2 20.8-34.7 27.7-18.1 9.7-23.7-.4-30.5-16.4-21.4-50.9-24-137.6-11.5-190.9 16.8-72.5 72.9-136.3 150-143.1 78-6.9 150.4 32.7 183.1 104.2 72.4 159.1-112.9 316.2-256.4 218.6Z" fill="currentColor"/></svg>
      </a>
    </div>
  `;
}

function normalizeFooterContacts() {
  const footer = document.querySelector("footer");
  footer?.querySelectorAll(".grid > div:last-child li").forEach((item) => {
    item.textContent = item.textContent.replace(/^[^+\p{L}\p{N}]+/u, "").trim();
  });
}

function initFooterSocialLinks() {
  const footer = document.querySelector("footer");
  const footerColumns = footer?.querySelectorAll(".grid > div");
  const contactColumn = footerColumns?.[footerColumns.length - 1];
  if (!contactColumn || contactColumn.querySelector("[data-footer-socials]")) return;

  contactColumn.insertAdjacentHTML("beforeend", buildFooterSocialLinksMarkup());
}

function initMobileMenu() {
  const mobileMenuButton = document.getElementById("mobile-menu-btn");
  const mobileMenu = document.getElementById("mobile-menu");
  if (!mobileMenuButton || !mobileMenu) return;

  mobileMenuButton.addEventListener("click", () => {
    mobileMenu.classList.toggle("hidden");
  });

  mobileMenu.querySelectorAll("a, button").forEach((item) => {
    item.addEventListener("click", () => mobileMenu.classList.add("hidden"));
  });
}

function initSeedCalculator() {
  const form = document.getElementById("seed-calc-form");
  if (!form) return;

  form.addEventListener("submit", (event) => {
    event.preventDefault();

    const density = parseFloat(document.getElementById("calc-density").value);
    const weight = parseFloat(document.getElementById("calc-weight").value);
    const germination = parseFloat(document.getElementById("calc-germination").value);

    if (!(density > 0 && weight > 0 && germination > 0)) return;

    const result = (density * weight) / (germination / 100);
    document.getElementById("result-value").textContent = result.toFixed(1);
    document.getElementById("calc-result")?.classList.remove("hidden");
  });
}

function initProfitCalculator() {
  const form = document.getElementById("profit-calc-form");
  if (!form) return;

  form.addEventListener("submit", (event) => {
    event.preventDefault();

    const area = parseFloat(document.getElementById("profit-area")?.value || "0");
    const yieldPerHa = parseFloat(document.getElementById("profit-yield")?.value || "0");
    const pricePerTon = parseFloat(document.getElementById("profit-price")?.value || "0");
    const costPerHa = parseFloat(document.getElementById("profit-cost")?.value || "0");
    const subsidyPct = parseFloat(document.getElementById("profit-subsidy")?.value || "0");

    if (!(area > 0 && yieldPerHa > 0 && pricePerTon > 0 && costPerHa >= 0 && subsidyPct >= 0)) return;

    const grossRevenue = area * yieldPerHa * pricePerTon;
    const grossCost = area * costPerHa;
    const subsidy = grossCost * (subsidyPct / 100);
    const netCost = grossCost - subsidy;
    const profit = grossRevenue - netCost;
    const roi = netCost > 0 ? (profit / netCost) * 100 : 0;

    document.getElementById("profit-revenue").textContent = formatRubShort(grossRevenue);
    document.getElementById("profit-net").textContent = formatRubShort(profit);
    document.getElementById("profit-roi").textContent = `${Math.round(roi)}%`;
    document.getElementById("profit-result")?.classList.remove("hidden");
  });
}

document.addEventListener("DOMContentLoaded", () => {
  initMobileMenu();
  normalizeFooterContacts();
  initFooterSocialLinks();
  initSeedCalculator();
  initProfitCalculator();
});