const FORM_ENDPOINT = '/api/leads/medical-centers-no-physio';

  const header = document.getElementById('header');
  const updateHeader = () => header.classList.toggle('scrolled', window.scrollY > 18);
  updateHeader();
  window.addEventListener('scroll', updateHeader, {passive:true});

  const revealObserver = 'IntersectionObserver' in window ? new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) { entry.target.classList.add('is-visible'); observer.unobserve(entry.target); }
    });
  }, {threshold:.12, rootMargin:'0px 0px -42px'}) : null;
  document.querySelectorAll('[data-reveal]').forEach((el, i) => {
    el.style.transitionDelay = `${Math.min((i % 5) * 55, 220)}ms`;
    if (revealObserver) revealObserver.observe(el); else el.classList.add('is-visible');
  });

  const counterObserver = 'IntersectionObserver' in window ? new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
      if (!entry.isIntersecting) return;
      const el = entry.target;
      const target = parseFloat(el.dataset.counter || '0');
      const suffix = el.dataset.suffix || '';
      const prefix = el.dataset.prefix || '';
      const decimals = String(target).includes('.') ? 1 : 0;
      const start = performance.now();
      const duration = 950;
      const tick = now => {
        const p = Math.min(1, (now - start) / duration);
        const eased = 1 - Math.pow(1 - p, 3);
        const v = target * eased;
        el.textContent = prefix + (target === 2.41 ? v.toFixed(2) : v.toFixed(decimals)).replace('.', ',') + suffix;
        if (p < 1) requestAnimationFrame(tick);
      };
      requestAnimationFrame(tick);
      observer.unobserve(el);
    });
  }, {threshold:.6}) : null;
  document.querySelectorAll('[data-counter]').forEach(el => counterObserver ? counterObserver.observe(el) : null);

  // Save UTM parameters into hidden fields.
  const params = new URLSearchParams(location.search);
  ['utm_source','utm_medium','utm_campaign','utm_content','utm_term'].forEach(key => {
    const input = document.querySelector(`[name="${key}"]`);
    let stored = '';
    try { stored = sessionStorage.getItem(key) || ''; } catch (e) { stored = ''; }
    if (input) input.value = params.get(key) || stored;
    if (params.get(key)) { try { sessionStorage.setItem(key, params.get(key)); } catch (e) {} }
  });

  const phone = document.getElementById('phone');
  phone.addEventListener('input', () => {
    let d = phone.value.replace(/\D/g,'').slice(0,11);
    if (!d) return;
    if (d[0] === '8') d = '7' + d.slice(1);
    if (d[0] !== '7') d = '7' + d;
    let value = '+7';
    if (d.length > 1) value += ' ' + d.slice(1,4);
    if (d.length >= 5) value += ' ' + d.slice(4,7);
    if (d.length >= 8) value += '-' + d.slice(7,9);
    if (d.length >= 10) value += '-' + d.slice(9,11);
    phone.value = value;
  });

  function setStatus(message, type) {
    const status = document.getElementById('formStatus');
    status.textContent = message;
    status.className = `form-status show ${type}`;
  }

  async function submitLead(event) {
    event.preventDefault();
    const form = event.currentTarget;
    const button = document.getElementById('submitBtn');
    if (form.website.value) return false;
    if (!form.checkValidity()) { form.reportValidity(); setStatus('Проверьте обязательные поля формы.', 'error'); return false; }
    const phoneDigits = form.phone.value.replace(/\D/g,'');
    if (phoneDigits.length < 11) { setStatus('Укажите полный номер телефона.', 'error'); form.phone.focus(); return false; }

    const payload = Object.fromEntries(new FormData(form).entries());
    payload.created_at = new Date().toISOString();
    payload.page_url = location.href;
    payload.page_title = document.title;

    button.disabled = true;
    button.textContent = 'Отправляем…';
    try {
      if (location.protocol === 'file:') throw new Error('preview');
      const response = await fetch(FORM_ENDPOINT, {
        method:'POST', headers:{'Content-Type':'application/json'}, body:JSON.stringify(payload)
      });
      if (!response.ok) throw new Error(`HTTP ${response.status}`);
      setStatus('Спасибо. Заявка отправлена — специалист свяжется с вами для предварительного аудита.', 'success');
      form.reset();
    } catch (error) {
      console.warn('Lead endpoint is not connected in preview:', error);
      if (location.protocol === 'file:' || location.hostname === 'localhost') {
        setStatus('Демонстрационный режим: форма заполнена корректно. Для публикации подключите FORM_ENDPOINT к CRM или webhook.', 'success');
      } else {
        setStatus('Не удалось отправить заявку. Попробуйте ещё раз или свяжитесь с компанией по телефону.', 'error');
      }
    } finally {
      button.disabled = false;
      button.innerHTML = `Получить предварительный аудит <svg viewBox='0 0 24 24' aria-hidden='true'><path d='M5 12h14M13 6l6 6-6 6' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>`;
    }
    return false;
  }
  window.submitLead = submitLead;

/* ---- next bundled script ---- */

(function(){
  const root=document.querySelector('[data-course-calculator]'); if(!root)return;
  const countInput=root.querySelector('#courseCalcCount'), checkInput=root.querySelector('#courseCalcCheck'), investmentInput=root.querySelector('#courseCalcInvestment');
  const monthOutput=root.querySelector('[data-course-month]'), yearOutput=root.querySelector('[data-course-year]'), paybackOutput=root.querySelector('[data-course-payback]'), roiOutput=root.querySelector('[data-course-roi]');
  const money=new Intl.NumberFormat('ru-RU',{maximumFractionDigits:0}); const decimal=new Intl.NumberFormat('ru-RU',{minimumFractionDigits:1,maximumFractionDigits:1});
  function safeNumber(input){const value=Number(String(input.value||'').replace(/\s/g,'').replace(',','.'));return Number.isFinite(value)&&value>0?value:0}
  function updateCourseRevenue(){
    const courses=safeNumber(countInput), averageCheck=safeNumber(checkInput), investment=safeNumber(investmentInput); const month=courses&&averageCheck?Math.round(courses*averageCheck):0; const year=month*12;
    monthOutput.textContent=month?money.format(month)+' ₽':'—'; yearOutput.textContent=year?money.format(year)+' ₽':'—';
    if(month&&investment){const payback=investment/month; paybackOutput.textContent=decimal.format(payback)+' мес.'; const roi=((year-investment)/investment)*100; roiOutput.textContent=Number.isFinite(roi)?money.format(Math.round(roi))+'%':'—'} else {paybackOutput.textContent='—';roiOutput.textContent='—'}
  }
  [countInput,checkInput,investmentInput].forEach(el=>el&&el.addEventListener('input',updateCourseRevenue)); updateCourseRevenue();
})();


/* === EXO callback modal === */
(function(){
  const modal=document.getElementById('exoCallbackModal');
  const form=document.getElementById('exoCallbackForm');
  if(!modal||!form) return;

  const triggers=[...document.querySelectorAll('.btn--call,.header-call')];
  const closeEls=modal.querySelectorAll('[data-callback-close]');
  const nameInput=document.getElementById('exoCallbackName');
  const phoneInput=document.getElementById('exoCallbackPhone');
  const submit=document.getElementById('exoCallbackSubmit');
  const status=document.getElementById('exoCallbackStatus');
  let lastFocused=null;

  function setStatus(message,type){
    status.textContent=message;
    status.className='exo-callback__status is-show '+(type==='success'?'is-success':'is-error');
  }
  function clearStatus(){
    status.textContent='';
    status.className='exo-callback__status';
  }
  function openModal(event){
    if(event) event.preventDefault();
    lastFocused=document.activeElement;
    clearStatus();
    modal.classList.add('is-open');
    modal.setAttribute('aria-hidden','false');
    document.body.classList.add('exo-callback-open');
    setTimeout(()=>nameInput && nameInput.focus(),60);
  }
  function closeModal(){
    modal.classList.remove('is-open');
    modal.setAttribute('aria-hidden','true');
    document.body.classList.remove('exo-callback-open');
    if(lastFocused && typeof lastFocused.focus==='function') lastFocused.focus();
  }

  triggers.forEach(el=>el.addEventListener('click',openModal));
  closeEls.forEach(el=>el.addEventListener('click',closeModal));
  document.addEventListener('keydown',e=>{
    if(e.key==='Escape' && modal.classList.contains('is-open')) closeModal();
  });

  function formatPhone(){
    let d=phoneInput.value.replace(/\D/g,'').slice(0,11);
    if(!d){phoneInput.value='';return}
    if(d[0]==='8') d='7'+d.slice(1);
    if(d[0]!=='7') d='7'+d;
    let value='+7';
    if(d.length>1) value+=' '+d.slice(1,4);
    if(d.length>=5) value+=' '+d.slice(4,7);
    if(d.length>=8) value+='-'+d.slice(7,9);
    if(d.length>=10) value+='-'+d.slice(9,11);
    phoneInput.value=value;
  }
  phoneInput.addEventListener('input',formatPhone);

  form.addEventListener('submit',async function(event){
    event.preventDefault();
    clearStatus();

    if(!form.checkValidity()){
      form.reportValidity();
      return;
    }
    const phoneDigits=phoneInput.value.replace(/\D/g,'');
    if(phoneDigits.length<11){
      setStatus('Укажите полный номер телефона.','error');
      phoneInput.focus();
      return;
    }

    const payload=Object.fromEntries(new FormData(form).entries());
    delete payload.consent;
    payload.lead_type='callback';
    payload.source='header-call-popup';
    payload.page_url=location.href;
    payload.page_title=document.title;
    payload.created_at=new Date().toISOString();

    const original=submit.textContent;
    submit.disabled=true;
    submit.textContent='Отправляем…';

    try{
      if(location.protocol==='file:') throw new Error('preview');
      const endpoint=form.dataset.endpoint;
      const response=await fetch(endpoint,{
        method:'POST',
        headers:{'Content-Type':'application/json','Accept':'application/json'},
        body:JSON.stringify(payload),
        credentials:'same-origin'
      });
      if(!response.ok) throw new Error('HTTP '+response.status);
      setStatus('Спасибо. Заявка отправлена — специалист свяжется с вами.','success');
      form.reset();
    }catch(error){
      console.warn('Callback form:',error);
      if(location.protocol==='file:' || location.hostname==='localhost'){
        setStatus('Демонстрационный режим: форма работает. После загрузки на сервер заявка будет отправляться в подключённый обработчик.','success');
      }else{
        setStatus('Не удалось отправить заявку. Попробуйте ещё раз или позвоните нам по номеру +7 927 789-60-71.','error');
      }
    }finally{
      submit.disabled=false;
      submit.textContent=original;
    }
  });
})();