function getCurrentPageName() {
  const normalizedPath = window.location.pathname.replace(/\/+$/, "");
  const raw = (normalizedPath.split("/").pop() || "").toLowerCase();
  const normalized = raw.replace(/\.html$/, "");
  return normalized || "index";
}

const isLocalDevHost =
  window.location.hostname === "localhost" ||
  window.location.hostname === "127.0.0.1";

function routeHref(page) {
  if (page === "index") {
    return isLocalDevHost ? "index.html" : "/";
  }
  return isLocalDevHost ? `${page}.html` : `/${page}`;
}

function renderSharedLayout() {
  const currentPage = getCurrentPageName();
  const headerMount = document.querySelector("[data-site-header]");
  const footerMount = document.querySelector("[data-site-footer]");

  if (headerMount) {
    const navItems = [
      { page: "prices", href: routeHref("prices"), label: "Цены" },
      { page: "portfolio", href: routeHref("portfolio"), label: "Портфолио" },
      { page: "reviews", href: routeHref("reviews"), label: "Отзывы" },
    ];

    const navHtml = navItems
      .map((item) => {
        const isCurrent = currentPage === item.page;
        return `<a class="header-link${isCurrent ? " header-link--current" : ""}" href="${item.href}"${isCurrent ? ' aria-current="page"' : ""}>${item.label}</a>`;
      })
      .join("");

    headerMount.outerHTML = `
  <header class="header">
    <div class="container header__inner">
      <div class="header__left">
        <a href="${routeHref("index")}" class="logo">
          <img src="image/logo-test.jpg" alt="Фриз">
        </a>
        <nav class="header__nav" aria-label="Основная навигация">
          ${navHtml}
        </nav>
      </div>
      <div class="header__actions">
        <div class="header__contact">
          <a class="phone-link" href="tel:+79217412646">+7 (921) 741-26-46</a>
          <span class="header__meta">Ежедневно 10:00-18:00</span>
          <span class="header__geo">Санкт-Петербург</span>
        </div>
        <a class="btn btn--outline" href="https://vk.com/ya_lo_ya" target="_blank" rel="noopener noreferrer">VK</a>
      </div>
    </div>
  </header>`;
  }

  if (footerMount) {
    const isPrivacyPage = currentPage === "privacy";
    const isRequisitesPage = currentPage === "requisites";

    footerMount.outerHTML = `
  <a class="floating-call" href="tel:+79217412646" aria-label="Позвонить">Позвонить</a>
  <footer class="footer">
    <div class="container footer__inner">
      <div class="footer__brand">
        <p class="footer__copy">© <span id="year"></span> Фриз. Все права защищены.</p>
        <p class="footer__ip">ИП Погребнякова Ольга Юрьевна</p>
        <p class="footer__geo">Работаем в Санкт-Петербурге и Ленинградской области</p>
      </div>
      <div class="footer__legal">
        <a class="footer__link" href="${routeHref("requisites")}"${isRequisitesPage ? ' aria-current="page"' : ""}>Реквизиты ИП</a>
        <a class="footer__link" href="${routeHref("privacy")}"${isPrivacyPage ? ' aria-current="page"' : ""}>Политика обработки персональных данных</a>
      </div>
      <p class="footer__disclaimer">Информация на сайте не является публичной офертой и носит информационный характер</p>
    </div>
  </footer>`;
  }
}

renderSharedLayout();

const currentYear = document.getElementById("year");
if (currentYear) {
  currentYear.textContent = new Date().getFullYear();
}

const reduceMotionMql = window.matchMedia("(prefers-reduced-motion: reduce)");

function easeInOutCubic(t) {
  return t < 0.5 ? 4 * t * t * t : 1 - Math.pow(-2 * t + 2, 3) / 2;
}

function smoothScrollTo(targetY) {
  const startY = window.scrollY || document.documentElement.scrollTop;
  const change = targetY - startY;
  if (reduceMotionMql.matches) {
    window.scrollTo(0, targetY);
    return;
  }
  if (Math.abs(change) < 2) {
    return;
  }
  const duration = Math.min(980, Math.max(480, Math.abs(change) * 0.62));
  const start = performance.now();

  const step = (now) => {
    const t = Math.min(1, (now - start) / duration);
    window.scrollTo(0, startY + change * easeInOutCubic(t));
    if (t < 1) {
      requestAnimationFrame(step);
    }
  };
  requestAnimationFrame(step);
}

document.addEventListener(
  "click",
  (e) => {
    if (document.documentElement.classList.contains("modal-open")) {
      return;
    }
    const a = e.target.closest("a");
    if (!a) {
      return;
    }
    const href = a.getAttribute("href");
    if (!href || href === "#" || href.charAt(0) !== "#") {
      return;
    }
    if (a.hasAttribute("download")) {
      return;
    }
    const el = document.querySelector(href);
    if (!el) {
      return;
    }
    e.preventDefault();
    const header = document.querySelector(".header");
    const headerH = header ? header.getBoundingClientRect().height : 0;
    const gap = 16;
    const y = el.getBoundingClientRect().top + window.scrollY - headerH - gap;
    smoothScrollTo(Math.max(0, y));
    history.pushState(null, "", href);
  },
  true
);

const isHomePage = () => {
  return getCurrentPageName() === "index";
};

document.querySelectorAll("a.logo").forEach((link) => {
  const href = (link.getAttribute("href") || "").trim();
  const goesHome =
    href === "index.html" ||
    href === "./index.html" ||
    href === "/" ||
    href === "/index" ||
    href.endsWith("/index.html");
  if (!goesHome) {
    return;
  }
  link.addEventListener("click", (event) => {
    if (!isHomePage()) {
      return;
    }
    event.preventDefault();
    if (window.scrollY > 0) {
      smoothScrollTo(0);
    }
    if (window.location.hash) {
      history.replaceState(null, "", window.location.pathname + window.location.search);
    }
  });
});

const form = document.getElementById("contactForm");
if (form) {
  form.setAttribute("novalidate", "novalidate");
  const nameInput = form.querySelector('input[name="name"]');
  const phoneInput = form.querySelector('input[name="phone"]');
  const honeypotInput = form.querySelector('input[name="contact_fax"]');
  const startedAtInput = form.querySelector('input[name="started_at"]');
  const submitButton = form.querySelector('button[type="submit"]');

  if (startedAtInput) {
    startedAtInput.value = String(Date.now());
  }

  if (phoneInput) {
    const formatPhone = (rawValue) => {
      const digits = rawValue.replace(/\D/g, "");
      const localDigits = digits.startsWith("7") ? digits.slice(1) : digits;
      const trimmed = localDigits.slice(0, 10);

      if (!trimmed.length) {
        return "+7";
      }

      let result = "+7";
      if (trimmed.length > 0) {
        result += ` (${trimmed.slice(0, 3)}`;
      }
      if (trimmed.length >= 3) {
        result += ")";
      }
      if (trimmed.length > 3) {
        result += ` ${trimmed.slice(3, 6)}`;
      }
      if (trimmed.length > 6) {
        result += `-${trimmed.slice(6, 8)}`;
      }
      if (trimmed.length > 8) {
        result += `-${trimmed.slice(8, 10)}`;
      }

      return result;
    };

    phoneInput.addEventListener("focus", () => {
      if (!phoneInput.value.trim()) {
        phoneInput.value = "+7";
      } else {
        phoneInput.value = formatPhone(phoneInput.value);
      }
    });

    phoneInput.addEventListener("input", () => {
      phoneInput.value = formatPhone(phoneInput.value);
      phoneInput.setSelectionRange(phoneInput.value.length, phoneInput.value.length);
    });

    phoneInput.addEventListener("keydown", (event) => {
      const selectionStart = phoneInput.selectionStart;
      const selectionEnd = phoneInput.selectionEnd;
      const hasSelection =
        selectionStart !== null &&
        selectionEnd !== null &&
        selectionStart !== selectionEnd;
      const fullSelection =
        selectionStart === 0 && selectionEnd === phoneInput.value.length;

      if (
        fullSelection &&
        (event.key === "Backspace" || event.key === "Delete")
      ) {
        event.preventDefault();
        phoneInput.value = "";
        return;
      }

      if (
        (event.key === "Backspace" || event.key === "Delete") &&
        selectionStart !== null &&
        selectionStart <= 2 &&
        !hasSelection
      ) {
        event.preventDefault();
      }
    });

    phoneInput.addEventListener("blur", () => {
      if (phoneInput.value === "+7" || phoneInput.value === "+7 (") {
        phoneInput.value = "";
      }
    });
  }

  const consentInput = form.querySelector('input[name="consent"]');
  const consentLabel = form.querySelector(".contact-form__consent");
  const nameValidationRegex = /^[A-Za-zА-Яа-яЁё\s-]{2,80}$/;

  const showFormToast = (message, variant = "warning") => {
    let toast = document.getElementById("formToast");
    if (!toast) {
      toast = document.createElement("div");
      toast.id = "formToast";
      toast.className = "form-toast";
      document.body.appendChild(toast);
    }
    toast.textContent = message;
    toast.classList.remove("form-toast--warning", "form-toast--success");
    toast.classList.add(`form-toast--${variant}`);
    toast.setAttribute("role", variant === "success" ? "status" : "alert");
    toast.setAttribute("aria-live", "polite");
    toast.classList.add("is-visible");
    clearTimeout(toast._hideTimer);
    const hideMs = variant === "success" ? 6000 : 5000;
    toast._hideTimer = window.setTimeout(() => {
      toast.classList.remove("is-visible");
    }, hideMs);
    toast.onclick = () => {
      clearTimeout(toast._hideTimer);
      toast.classList.remove("is-visible");
    };
  };

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

    if (nameInput) {
      const normalizedName = nameInput.value.trim().replace(/\s+/g, " ");
      nameInput.value = normalizedName;
      if (!normalizedName) {
        showFormToast("Пожалуйста, укажите ваше имя", "warning");
        nameInput.focus();
        return;
      }
      if (!nameValidationRegex.test(normalizedName)) {
        showFormToast(
          "Имя должно содержать только буквы, пробелы и дефис (2-80 символов)",
          "warning"
        );
        nameInput.focus();
        return;
      }
    }

    if (phoneInput) {
      const phoneDigits = phoneInput.value.replace(/\D/g, "");
      const isPhoneValid = phoneDigits.length === 11 && phoneDigits.startsWith("7");
      if (!isPhoneValid) {
        showFormToast("Пожалуйста, укажите корректный номер телефона", "warning");
        phoneInput.focus();
        return;
      }
    }

    if (consentInput && !consentInput.checked) {
      consentLabel?.classList.add("contact-form__consent--error");
      consentLabel?.scrollIntoView({ behavior: "smooth", block: "center" });
      showFormToast(
        "Чтобы отправить заявку, отметьте согласие на обработку персональных данных",
        "warning"
      );
      consentInput.focus();
      return;
    }
    consentLabel?.classList.remove("contact-form__consent--error");

    if (startedAtInput && !startedAtInput.value) {
      startedAtInput.value = String(Date.now());
    }

    const formData = new FormData(form);
    // Явно чистим honeypot: защищает от автозаполнения браузером.
    if (honeypotInput) {
      honeypotInput.value = "";
    }
    formData.delete("website");
    formData.set("contact_fax", "");
    if (!formData.get("consent")) {
      formData.set("consent", "1");
    }

    if (submitButton) {
      submitButton.disabled = true;
      submitButton.setAttribute("aria-busy", "true");
    }

    fetch("submit.php", {
      method: "POST",
      body: formData,
      headers: {
        Accept: "application/json",
      },
    })
      .then(async (response) => {
        let payload = null;
        try {
          payload = await response.json();
        } catch (error) {
          payload = null;
        }

        if (!response.ok || !payload?.ok) {
          const errorMessage =
            payload?.message ||
            "Не удалось отправить заявку. Позвоните нам, пожалуйста, по телефону +7 (921) 741-26-46";
          throw new Error(errorMessage);
        }

        showFormToast("Спасибо! Заявка принята — скоро мы с вами свяжемся", "success");
        form.reset();
        if (startedAtInput) {
          startedAtInput.value = String(Date.now());
        }
      })
      .catch((error) => {
        showFormToast(error.message, "warning");
      })
      .finally(() => {
        if (submitButton) {
          submitButton.disabled = false;
          submitButton.removeAttribute("aria-busy");
        }
      });
  });

  if (consentInput) {
    consentInput.addEventListener("change", () => {
      if (consentInput.checked) {
        consentLabel?.classList.remove("contact-form__consent--error");
      }
    });
  }
}

const revealItems = document.querySelectorAll(".reveal");
const revealObserver = new IntersectionObserver(
  (entries, observer) => {
    entries.forEach((entry) => {
      if (!entry.isIntersecting) {
        return;
      }
      entry.target.classList.add("is-visible");
      observer.unobserve(entry.target);
    });
  },
  {
    threshold: 0.15,
  }
);

revealItems.forEach((item) => revealObserver.observe(item));

const priceAccordion = document.getElementById("priceAccordion");

const fallbackPriceData = [
  {
    title: "Электромонтажные работы",
    items: [
      { name: "Установка розетки", price: "от 650 ₽/шт" },
      { name: "Установка выключателя", price: "от 550 ₽/шт" },
      { name: "Монтаж подрозетника", price: "от 450 ₽/шт" },
      { name: "Монтаж точки освещения", price: "от 1 200 ₽/шт" },
      { name: "Монтаж потолочного светильника", price: "от 900 ₽/шт" },
    ],
  },
  {
    title: "Плиточные работы",
    items: [
      { name: "Укладка плитки 20x30", price: "от 350 ₽/шт" },
      { name: "Укладка керамогранита 60x60", price: "от 900 ₽/шт" },
      { name: "Запил плитки под 45 градусов", price: "от 500 ₽/пог.м" },
      { name: "Затирка эпоксидная", price: "от 300 ₽/м²" },
    ],
  },
  {
    title: "Сантехнические работы",
    items: [
      { name: "Установка смесителя", price: "от 1 500 ₽/шт" },
      { name: "Монтаж унитаза", price: "от 2 500 ₽/шт" },
      { name: "Установка раковины с тумбой", price: "от 3 000 ₽/шт" },
      { name: "Подключение полотенцесушителя", price: "от 2 800 ₽/шт" },
    ],
  },
];

function escapeHtml(value) {
  const text = String(value ?? "");
  return text
    .replace(/&/g, "&amp;")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&#39;");
}

function normalizePriceData(data) {
  if (!Array.isArray(data)) {
    return JSON.parse(JSON.stringify(fallbackPriceData));
  }

  return data.map((category) => ({
    title: typeof category?.title === "string" ? category.title : "",
    items: Array.isArray(category?.items)
      ? category.items.map((item) => ({
          name: typeof item?.name === "string" ? item.name : "",
          price: typeof item?.price === "string" ? item.price : "",
          amount: typeof item?.amount === "string" ? item.amount : "",
          unit: typeof item?.unit === "string" ? item.unit : "",
          total: typeof item?.total === "string" ? item.total : "",
        }))
      : [],
  }));
}

async function loadPriceData() {
  const externalData =
    typeof window.PRICES_DATA !== "undefined" ? window.PRICES_DATA : null;
  if (externalData) {
    return normalizePriceData(externalData);
  }
  return JSON.parse(JSON.stringify(fallbackPriceData));
}

function buildPriceList(items) {
  return items
    .map(
      (item) => {
        const rawPrice = String(item.price || "").trim();
        const desktopPrice = rawPrice
          .replace(/\s*\/\s*[^\s]+$/u, "")
          .trim();
        const mobilePrice = rawPrice
          .replace(/^от\s+/iu, "")
          .replace(/\s*\/\s*[^\s]+$/u, "")
          .trim();
        const derivedUnitMatch = rawPrice.match(/\/\s*([^\s]+)$/);
        const derivedUnit = derivedUnitMatch ? derivedUnitMatch[1] : "";
        const amountValue = item.amount || "1";
        const unitValue = item.unit || derivedUnit || "";
        const normalizedName = String(item.name || "").trim().replace(/\s+/g, " ");
        const fullName = escapeHtml(normalizedName);
        return `
        <li>
          <span class="price-work-name">${fullName}</span>
          <span class="price-value">
            <span class="price-value__full">${escapeHtml(desktopPrice || rawPrice)}</span>
            <span class="price-value__mobile">${escapeHtml(mobilePrice || rawPrice)}</span>
          </span>
          <span>${escapeHtml(amountValue)}</span>
          <span>${escapeHtml(unitValue || "—")}</span>
        </li>
      `;
      }
    )
    .join("");
}

function renderPriceAccordion(priceData) {
  if (!priceAccordion) {
    return;
  }

  priceAccordion.innerHTML = priceData
    .map(
      (category) => `
        <article class="price-category">
          <button class="price-category__toggle" type="button" aria-expanded="false">
            ${escapeHtml(category.title || "Категория")}
          </button>
          <div class="price-list-wrap" hidden>
            <ul class="price-list">
              <li class="price-list__head" aria-hidden="true">
                <span>Виды работ</span>
                <span>Цена</span>
                <span>Кол-во</span>
                <span>Ед.изм</span>
              </li>
              ${buildPriceList(Array.isArray(category.items) ? category.items : [])}
            </ul>
          </div>
        </article>
      `
    )
    .join("");
}

if (priceAccordion) {
  loadPriceData().then(renderPriceAccordion);

  priceAccordion.addEventListener("click", (event) => {
    const target = event.target;
    if (!(target instanceof HTMLElement)) {
      return;
    }

    if (target.classList.contains("price-category__toggle")) {
      const category = target.closest(".price-category");
      const listWrap = category ? category.querySelector(".price-list-wrap") : null;
      if (!listWrap) {
        return;
      }

      const expanded = target.getAttribute("aria-expanded") === "true";
      target.setAttribute("aria-expanded", String(!expanded));
      listWrap.hidden = expanded;
    }
  });
}

const LOGO_KEY = "remont-spb-logo";
const DEFAULT_LOGO = "logo-interior-1.png";
const logoOptions = [
  { id: "logo-option-1.png", label: "1" },
  { id: "logo-option-2.png", label: "2" },
  { id: "logo-option-3.png", label: "3" },
  { id: "logo-option-4.png", label: "4" },
  { id: "logo-option-6.png", label: "5" },
  { id: "logo-right-2.png", label: "6" },
  { id: "logo-right-4.png", label: "7" },
  { id: "logo-right-5.png", label: "8" },
  { id: "logo-simple-1.png", label: "9" },
  { id: "logo-simple-3.png", label: "10" },
  { id: "logo-interior-1.png", label: "11" },
  { id: "logo-interior-6.png", label: "12" },
  { id: "logo-interior-8.png", label: "13" },
  { id: "logo-interior-9.png", label: "14" },
  { id: "logo-flat-2.png", label: "15" },
  { id: "logo-flat-3.png", label: "16" },
  { id: "logo-flat-5.png", label: "17" },
];

const BG_KEY = "remont-spb-bg";
const DEFAULT_BG = "bg-4.png";
const bgOptions = [
  { id: "none", label: "Без фона" },
  { id: "bg-1.png", label: "Фон 1" },
  { id: "bg-2.png", label: "Фон 2" },
  { id: "bg-3.png", label: "Фон 3" },
  { id: "bg-4.png", label: "Фон 4" },
  { id: "bg-5.png", label: "Фон 5" },
];

function applyLogo(logoId) {
  localStorage.setItem(LOGO_KEY, logoId);
  const logoPath = `image/${logoId}`;
  
  const logoImgs = document.querySelectorAll(".logo img");
  logoImgs.forEach((img) => {
    img.src = logoPath;
  });
}

function applyBg(bgId) {
  localStorage.setItem(BG_KEY, bgId);
  const heroBg = document.getElementById("heroBg");
  const heroSection = document.getElementById("hero");
  
  if (heroBg && heroSection) {
    if (bgId === "none") {
      heroBg.style.display = "none";
      heroBg.src = "";
    } else {
      heroBg.style.display = "block";
      heroBg.src = `image/${bgId}`;
    }
  }
}

function applyBrandingDefaults() {
  // Применяем зафиксированные значения брендинга без UI-переключателя.
  applyLogo(DEFAULT_LOGO);
  applyBg(DEFAULT_BG);
}

applyBrandingDefaults();

/* Portfolio Gallery Logic */
const workCards = document.querySelectorAll('.work-card[data-images]');
const portfolioModal = document.getElementById('portfolioModal');
const portfolioTrack = document.getElementById('portfolioTrack');

if (portfolioModal && portfolioTrack) {
  const closeButtons = portfolioModal.querySelectorAll('[data-close]');

  const openModal = (images) => {
    portfolioTrack.innerHTML = images
      .map(
        (src) =>
          `<div class="portfolio-modal__slide"><img src="${src}" alt="Фото объекта"></div>`
      )
      .join('');
    portfolioModal.classList.add('is-open');
    document.documentElement.classList.add('modal-open');
    document.body.classList.add('modal-open');
  };

  const closeModal = () => {
    portfolioModal.classList.remove('is-open');
    document.documentElement.classList.remove('modal-open');
    document.body.classList.remove('modal-open');
  };

  workCards.forEach(card => {
    card.addEventListener('click', () => {
      try {
        const images = JSON.parse(card.dataset.images);
        if (images && images.length) {
          openModal(images);
        }
      } catch (e) {
        console.error('Ошибка при чтении картинок галереи', e);
      }
    });
  });

  closeButtons.forEach(btn => btn.addEventListener('click', closeModal));

  document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape' && portfolioModal.classList.contains('is-open')) {
      closeModal();
    }
  });

  // Логика перетаскивания (Drag-to-scroll)
  let isDown = false;
  let startX;
  let scrollLeft;

  portfolioTrack.addEventListener('mousedown', (e) => {
    isDown = true;
    portfolioTrack.classList.add('is-dragging');
    startX = e.pageX - portfolioTrack.offsetLeft;
    scrollLeft = portfolioTrack.scrollLeft;
  });

  portfolioTrack.addEventListener('mouseleave', () => {
    isDown = false;
    portfolioTrack.classList.remove('is-dragging');
  });

  portfolioTrack.addEventListener('mouseup', () => {
    isDown = false;
    portfolioTrack.classList.remove('is-dragging');
  });

  portfolioTrack.addEventListener('mousemove', (e) => {
    if (!isDown) return;
    e.preventDefault();
    const x = e.pageX - portfolioTrack.offsetLeft;
    const walk = (x - startX) * 2; // Скорость прокрутки при перетаскивании
    portfolioTrack.scrollLeft = scrollLeft - walk;
  });

  // Прокрутка колесиком мыши (Wheel scroll)
  portfolioTrack.addEventListener('wheel', (e) => {
    if (e.deltaY !== 0) {
      e.preventDefault();
      portfolioTrack.scrollLeft += e.deltaY;
    }
  });

  // Блокируем прокрутку страницы, пока открыта модалка
  portfolioModal.addEventListener(
    'wheel',
    (e) => {
      if (!portfolioModal.classList.contains('is-open')) {
        return;
      }
      e.preventDefault();
    },
    { passive: false }
  );
}