/* AGS 92 B2B – DPH náplasť pre trhy s prenesením daňovej povinnosti (CZ, HU, PL, EN).
 * Na SK nerobí nič. Skrýva sumy "s DPH", stĺpec DPH v košíku prepíše na 0 %,
 * doplní vetu o reverse charge. Iba zobrazenie – nič neposiela na server.
 * Vypnutie: odstrániť include z pätičky (Container 22, property[15]).
 */
(function () {
  'use strict';
  var lang = (location.pathname.split('/')[1] || '').toLowerCase();
  if (!/^(cz|hu|pl|com)$/.test(lang)) return; /* SK a admin: nič */
  if (window.__agsDphLoaded) return;
  window.__agsDphLoaded = true;

  var NOTES = {
    cz: 'Ceny jsou uvedeny bez DPH. DPH se neúčtuje – přenesení daňové povinnosti (reverse charge).',
    hu: 'Az árak ÁFA nélkül értendők. ÁFA nem kerül felszámításra – fordított adózás (reverse charge).',
    pl: 'Ceny netto. VAT nie jest naliczany – odwrotne obciążenie (reverse charge).',
    en: 'Prices are net. VAT is not charged – reverse charge.'
  };
  var NET_LABEL = { cz: 'bez DPH', hu: 'ÁFA nélkül', pl: 'netto', en: 'excl. VAT' };
  var NOTE = NOTES[lang] || NOTES.en;
  var NETL = NET_LABEL[lang] || NET_LABEL.en;
  var VAT_HDR = /^(DPH|ÁFA|VAT|Sazba DPH|Sadzba DPH|ÁFA kulcs|Stawka VAT|VAT rate)\s*(%|\(%\))?$/i;

  function txt(e) { return (e && e.textContent || '').replace(/\s+/g, ' ').trim(); }

  function makeNote(cls) {
    var d = document.createElement('div');
    d.className = 'ags-vat-note ' + (cls || '');
    d.setAttribute('style', 'margin:10px 0;padding:8px 12px;border-left:3px solid #4a7bd0;background:#eef3fc;color:#1f3b6e;font-size:13px;line-height:1.4;');
    d.textContent = NOTE;
    return d;
  }
  function addNoteAfter(el, key) {
    if (!el || !el.parentNode) return;
    if (el.parentNode.querySelector('.ags-vat-note.' + key)) return;
    el.parentNode.insertBefore(makeNote(key), el.nextSibling);
  }

  /* 1. Mini košík v hlavičke (aj po AJAX prepísaní) */
  function miniCart() {
    var boxes = document.querySelectorAll('#mini-cart, .shopping-cart-small, .eshop-small-cart');
    for (var i = 0; i < boxes.length; i++) {
      var box = boxes[i];
      var gross = box.querySelector('.total-price-formated');
      var net = box.querySelector('.total-price-no-vat-formated');
      if (!gross || !net) continue;
      var nv = txt(net);
      if (nv && txt(gross) !== nv) gross.textContent = nv;
      if (!gross.nextSibling || !gross.nextSibling.classList || !gross.nextSibling.classList.contains('ags-vat-net')) {
        var lbl = document.createElement('small');
        lbl.className = 'ags-vat-net';
        lbl.textContent = ' ' + NETL;
        gross.parentNode.insertBefore(lbl, gross.nextSibling);
      }
      /* schovať duplicitný riadok "539 Kč bez DPH" pod tým */
      var small = net.closest('small');
      if (small && !small.classList.contains('ags-vat-done')) {
        small.classList.add('ags-vat-done');
        var n = small.firstChild;
        while (n) {
          var next = n.nextSibling;
          if (n.nodeType === 1 && n.tagName === 'BR') { n.parentNode.removeChild(n); break; }
          if (n.nodeType === 3) n.textContent = '';
          else if (n.nodeType === 1) n.style.display = 'none';
          n = next;
        }
      }
    }
  }

  /* 2. Košík: stĺpec DPH → 0 %, riadok "DPH 23%" v súhrne preč, poznámka */
  function cartPage() {
    var tables = document.querySelectorAll('table.basket_table');
    for (var t = 0; t < tables.length; t++) {
      var tbl = tables[t];
      var ths = tbl.querySelectorAll('thead th');
      var idx = -1;
      for (var h = 0; h < ths.length; h++) if (VAT_HDR.test(txt(ths[h]))) { idx = h; break; }
      if (idx < 0) continue;
      var rows = tbl.querySelectorAll('tbody tr');
      for (var r = 0; r < rows.length; r++) {
        var cells = rows[r].children;
        var td = cells[idx];
        if (td && td.tagName === 'TD' && /^\d+([.,]\d+)?\s*%?$/.test(txt(td)) && txt(td) !== '0 %') { td.textContent = '0\u00a0%'; td.style.whiteSpace = 'nowrap'; }
      }
    }
    var sums = document.querySelectorAll('table.summary');
    for (var s = 0; s < sums.length; s++) {
      var trs = sums[s].querySelectorAll('tfoot tr, tbody tr');
      for (var k = 0; k < trs.length; k++) {
        var tr = trs[k];
        if (tr.style.display === 'none') continue;
        var hasVat = false;
        var tds = tr.querySelectorAll('td');
        for (var c = 0; c < tds.length; c++) {
          var cl = ' ' + (tds[c].className || '') + ' ';
          if (/ vat-\d+-formated /.test(cl)) hasVat = true;
        }
        if (hasVat) tr.style.display = 'none';
      }
      addNoteAfter(sums[s], 'ags-note-cart');
    }
  }

  /* 3. Dodacie údaje: "663 Kč s DPH" preč */
  function deliveryPage() {
    var g = document.querySelectorAll('.bt-cart-total-total-price.total-price-formated');
    for (var i = 0; i < g.length; i++) {
      g[i].style.display = 'none';
      var net = g[i].parentNode && g[i].parentNode.querySelector('.total-price-no-vat-formated');
      if (net) addNoteAfter(net, 'ags-note-delivery');
    }
  }

  /* 4. Súhrn objednávky: poznámka nad tlačidlom OBJEDNAŤ */
  function summaryPage() {
    var f = document.querySelector('input[name="b2_b_summary_form"]');
    if (!f) return;
    var main = document.querySelector('main') || document.body;
    var tbls = main.querySelectorAll('table.table-striped');
    if (!tbls.length) tbls = main.querySelectorAll('table');
    var tbl = tbls.length ? tbls[Math.min(1, tbls.length - 1)] : null; /* 2. tabuľka = celková výška objednávky */
    if (tbl) addNoteAfter(tbl, 'ags-note-summary');
  }

  var timer = null;
  function run() {
    timer = null;
    try { miniCart(); cartPage(); deliveryPage(); summaryPage(); } catch (e) { /* fail-open */ }
  }
  function schedule() { if (!timer) timer = setTimeout(run, 60); }

  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', run); else run();
  if (window.MutationObserver) {
    new MutationObserver(schedule).observe(document.documentElement, { childList: true, subtree: true, characterData: true });
  }
  window.addEventListener('load', run);
})();