(function () {
  'use strict';

  /* =========================
     BOOTSTRAP SEGURO (GTM / SPA)
  ========================= */

  if (window.__NPW_LOADED__) return;
  window.__NPW_LOADED__ = true;

  /* =========================
     CONFIGURAÇÃO GLOBAL
  ========================= */

  var NPW = {
    config: {
      defaultWhatsLink: "https://api.whatsapp.com/send/?phone=5511999254339&text=Estou no site do Dr. David Mognato e gostaria de mais informações",
      apiURL: "https://wapi.bernardo.app.br/v1/1",
      clientId: "1",
      interceptSelector: 'a.npw-whats',
      minNameLength: 3,
      phoneDigits: 11
    },
    state: {
      pendingUrl: null,
      buttonHTML: null,
      submitting: false
    }
  };

  /* =========================
     READY
  ========================= */

  function onReady(fn) {
    if (document.readyState !== 'loading') fn();
    else document.addEventListener('DOMContentLoaded', fn);
  }

  onReady(initNPW);

  /* =========================
     INIT
  ========================= */

  function initNPW() {
    if (!document.body || document.getElementById('npw-btn')) return;
    injectCSS();
    injectHTML();
    bindStaticEvents();
    observeWhatsLinks();
  }

  /* =========================
     CSS
  ========================= */

  function injectCSS() {
    if (document.getElementById('npw-style')) return;

    var style = document.createElement('style');
    style.id = 'npw-style';
    style.textContent = `
#npw-btn img {width:16px;height:16px;}
#npw-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;justify-content:center;align-items:center;z-index:9999}
#npw-modal{background:#fff;padding:24px;border-radius:12px;max-width:400px;width:90%;font-family:Segoe UI,Tahoma,sans-serif;display:flex;flex-direction:column;gap:14px;position:relative}
#npw-modal h2{margin:0;font-size:17px;color:#333}
#npw-modal input{padding:10px;border-radius:8px;border:1px solid #ccc;font-size:15px}
#npw-modal button{background:#25d366;color:#fff;border:0;padding:10px;border-radius:8px;font-weight:700;cursor:pointer}
#npw-btn{font-size:16px;display:flex;align-items:center;gap:8px;position:fixed;bottom:20px;left:20px;z-index:10000;background:#ff0000;color:#fff;border:0;padding:12px 20px;border-radius:8px;font-weight:600;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.15)}
#npw-error{color:red;font-size:14px;min-height:18px;margin-bottom:6px}
    `;
    document.head.appendChild(style);
  }

  /* =========================
     HTML
  ========================= */

  function injectHTML() {
    var html = `
<button id="npw-btn">
  <img src="data:image/png;base64,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">
  Como posso ajudar ou não?
</button>

<div id="npw-overlay">
  <div id="npw-modal">
    <h2>Informe seus dados e fale com nossa equipe</h2>
    <div id="npw-error"></div>
    <input id="npw-name" placeholder="Seu nome completo">
    <input id="npw-phone" placeholder="WhatsApp" inputmode="numeric">
    <button id="npw-submit">Enviar e esperar</button>
  </div>
</div>`;
    document.body.insertAdjacentHTML('beforeend', html);
  }

  /* =========================
     EVENTS
  ========================= */

  function bindStaticEvents() {
    var overlay = document.getElementById('npw-overlay');
    var btn = document.getElementById('npw-btn');
    var nameInput = document.getElementById('npw-name');
    var phoneInput = document.getElementById('npw-phone');
    var submit = document.getElementById('npw-submit');

    NPW.state.buttonHTML = btn.innerHTML;

    phoneInput.addEventListener('input', maskPhone);
    btn.addEventListener('click', toggleModal);
    overlay.addEventListener('click', function (e) {
      if (e.target === overlay) closeModal();
    });

    submit.addEventListener('click', function () {
      if (!NPW.state.submitting) handleSubmit(nameInput, phoneInput, submit);
    });

    document.addEventListener('keydown', function (e) {
      if (e.key === 'Escape') closeModal();
    });
  }

  /* =========================
     MODAL
  ========================= */

  function toggleModal() {
    var overlay = document.getElementById('npw-overlay');
    var btn = document.getElementById('npw-btn');
    var open = overlay.style.display === 'flex';

    overlay.style.display = open ? 'none' : 'flex';
    btn.innerHTML = open ? NPW.state.buttonHTML : 'Fechar';

    if (!open) document.getElementById('npw-name').focus();
    clearError();
  }

  function closeModal() {
    document.getElementById('npw-overlay').style.display = 'none';
    document.getElementById('npw-btn').innerHTML = NPW.state.buttonHTML;
    NPW.state.pendingUrl = null;
    NPW.state.submitting = false;
    clearError();
    document.getElementById('npw-name').value = '';
    document.getElementById('npw-phone').value = '';
  }

  function showError(msg, input) {
    const errorDiv = document.getElementById('npw-error');
    if (errorDiv) errorDiv.textContent = msg;
    if (input) {
      input.style.borderColor = 'red';
      input.focus();
    }
  }

  function clearError() {
    const errorDiv = document.getElementById('npw-error');
    if (errorDiv) errorDiv.textContent = '';
    document.getElementById('npw-name').style.borderColor = '';
    document.getElementById('npw-phone').style.borderColor = '';
  }

  /* =========================
     WHATS LINKS (SPA SAFE)
  ========================= */

  function observeWhatsLinks() {
    bindWhatsLinks();
    new MutationObserver(bindWhatsLinks).observe(document.body, { childList: true, subtree: true });
  }

  function bindWhatsLinks() {
    document.querySelectorAll(NPW.config.interceptSelector).forEach(function (link) {
      if (link.__npwBound) return;
      link.__npwBound = true;

      link.addEventListener('click', function (e) {
        e.preventDefault();
        NPW.state.pendingUrl = link.href;
        openModal();
      });
    });
  }

  function openModal() {
    document.getElementById('npw-overlay').style.display = 'flex';
    document.getElementById('npw-btn').innerHTML = 'Fechar';
    document.getElementById('npw-name').focus();
    clearError();
  }

  /* =========================
     FORM
  ========================= */

  function getParam(key) {
    const params = new URLSearchParams(window.location.search);
    const value = params.get(key);
    if (value) sessionStorage.setItem(key, value);
    return sessionStorage.getItem(key) || '';
  }

  function maskPhone(e) {
    var v = e.target.value.replace(/\D/g, '').slice(0, 11);
    v = v.replace(/^(\d{2})(\d)/, '($1) $2');
    v = v.replace(/(\d{5})(\d)/, '$1-$2');
    e.target.value = v;
  }

  async function handleSubmit(nameInput, phoneInput, submit) {
    var name = nameInput.value.trim();
    var phoneDigits = phoneInput.value.replace(/\D/g, '');

    clearError();

    if (name.length < NPW.config.minNameLength) return showError('Informe seu nome.', nameInput);
    if (phoneDigits.length !== NPW.config.phoneDigits) return showError('Número de WhatsApp inválido.', phoneInput);

    NPW.state.submitting = true;
    submit.disabled = true;
    submit.textContent = 'Enviando...';

    try {
      await fetch(NPW.config.apiURL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        body:
          'number=' + encodeURIComponent(phoneDigits) +
          '&name=' + encodeURIComponent(name) +
          '&id=' + encodeURIComponent(NPW.config.clientId) +
          '&gclid=' + encodeURIComponent(getParam('gclid')) +
          '&utm_source=' + encodeURIComponent(getParam('utm_source')) +
          '&utm_campaign=' + encodeURIComponent(getParam('utm_campaign')) +
          '&utm_medium=' + encodeURIComponent(getParam('utm_medium')) +
		  '&page=' + encodeURIComponent(location.href)
      });
    } catch (err) {
      showError('Erro ao enviar. Tente novamente.', null);
    }

    window.dataLayer = window.dataLayer || [];
    dataLayer.push({
      event: 'whatsapp_lead_submit',
      user_phone: '+55' + phoneDigits,
      user_name: name,
    });

    window.open(NPW.state.pendingUrl || NPW.config.defaultWhatsLink, '_blank');
    closeModal();
    submit.disabled = false;
    submit.textContent = 'Enviar e esperar';
  }

})();