Kalkulator monitoringu

<?php
/*
Plugin Name: Kalkulator Kosztu Monitoringu (IT-R.PL)
Description: Prost y kalkulator kosztu monitoringu z krótkim kodem [monitoring_calculator]. Liczy sprzęt/usługę, netto/brutto.
Version: 1.0.0
Author: it-r.pl / superstrony.eu
*/

if (!defined('ABSPATH')) { exit; }

class ITR_Monitoring_Calculator {
  private $slug = 'itr_monitoring_calculator';

  // Cennik (netto)
  private $prices = [
    // Sprzęt
    'gniazdo'                   => ['label' => 'Gniazdo', 'unit' => 'szt', 'price' => 79.00,   'group' => 'sprzet'],
    'puszka'                    => ['label' => 'Puszka', 'unit' => 'szt', 'price' => 69.00,   'group' => 'sprzet'],
    'kamera_4mp'                => ['label' => 'Kamera 4MP', 'unit' => 'szt', 'price' => 300.00, 'group' => 'sprzet'],
    'poe_adapter'               => ['label' => 'Przejściówka PoE', 'unit' => 'szt', 'price' => 25.00,  'group' => 'sprzet'],
    'switch_16'                 => ['label' => 'Switch 16 port', 'unit' => 'szt', 'price' => 468.00, 'group' => 'sprzet'],
    'patchpanel_1u'             => ['label' => 'Patchpanel 1U', 'unit' => 'szt', 'price' => 80.00,  'group' => 'sprzet'],
    'patchcord'                 => ['label' => 'Patchcordy', 'unit' => 'szt', 'price' => 5.00,   'group' => 'sprzet'],
    'nvr_16'                    => ['label' => 'Rejestrator 1U 16 kamer', 'unit' => 'szt', 'price' => 500.00, 'group' => 'sprzet'],
    'hdd_1tb'                   => ['label' => 'Dysk 1TB', 'unit' => 'szt', 'price' => 264.00, 'group' => 'sprzet'],
    'maskownica_1u'             => ['label' => 'Maskownica 1U', 'unit' => 'szt', 'price' => 16.00,  'group' => 'sprzet'],
    'listwa_1u'                 => ['label' => 'Listwa zasilająca 1U', 'unit' => 'szt', 'price' => 159.00, 'group' => 'sprzet'],
    'szafa_sieciowa'            => ['label' => 'Szafa sieciowa', 'unit' => 'szt', 'price' => 480.00, 'group' => 'sprzet'],
    'przewod_mb'                => ['label' => 'Przewód (mb)', 'unit' => 'mb', 'price' => 6.00,   'group' => 'sprzet'],
    'koryta_mb'                 => ['label' => 'Koryta (mb)', 'unit' => 'mb', 'price' => 6.00,   'group' => 'sprzet'],

    // Usługa
    'montaz_szafy'              => ['label' => 'Montaż szafy', 'unit' => 'szt', 'price' => 300.00, 'group' => 'usluga'],
    'montaz_przewodu_mb'        => ['label' => 'Montaż przewodu (mb)', 'unit' => 'mb', 'price' => 19.00,  'group' => 'usluga'],
    'montaz_kamery'             => ['label' => 'Montaż 1 szt. kamery', 'unit' => 'szt', 'price' => 200.00, 'group' => 'usluga'],
    'konfiguracja'              => ['label' => 'Konfiguracja (ryczałt)', 'unit' => 'szt', 'price' => 200.00, 'group' => 'usluga', 'is_flat' => true],
  ];

  public function __construct() {
    add_action('init', [$this, 'register_assets']);
    add_shortcode('monitoring_calculator', [$this, 'render_shortcode']);
  }

  public function register_assets() {
    // CSS
    $css = 
      '.itr-mc{max-width:980px;margin:24px auto;padding:16px;border:1px solid #e5e7eb;border-radius:14px;background:#fff;box-shadow:0 6px 18px rgba(0,0,0,.06)}'.
      '.itr-mc h3{margin:0 0 8px;font-size:22px}'.
      '.itr-mc small{color:#6b7280}'.
      '.itr-mc .bar{display:flex;gap:12px;align-items:center;justify-content:space-between;margin:10px 0 18px}'.
      '.itr-mc .bar input[type=number]{width:120px;padding:8px 10px;border:1px solid #d1d5db;border-radius:10px}'.
      '.itr-mc table{width:100%;border-collapse:separate;border-spacing:0 8px}'.
      '.itr-mc th,.itr-mc td{text-align:left;padding:10px 12px;background:#f9fafb}'.
      '.itr-mc tr td:first-child,.itr-mc tr th:first-child{border-radius:10px 0 0 10px}'.
      '.itr-mc tr td:last-child,.itr-mc tr th:last-child{border-radius:0 10px 10px 0}'.
      '.itr-mc .group{margin-top:22px;font-weight:700;color:#111827}'.
      '.itr-mc .totals{margin-top:22px;display:grid;grid-template-columns:1fr 1fr;gap:12px}'.
      '.itr-mc .totals .card{background:#f3f4f6;border-radius:12px;padding:12px 14px}'.
      '.itr-mc .muted{color:#6b7280;font-weight:400}'.
      '.itr-mc .right{text-align:right}'.
      '.itr-mc .btn{display:inline-block;margin-top:12px;padding:10px 14px;border-radius:10px;background:#111827;color:#fff;text-decoration:none}'.
      '.itr-mc .vat{display:flex;gap:10px;align-items:center;margin:12px 0 6px}'
    ;

    wp_register_style($this->slug, false);
    wp_add_inline_style($this->slug, $css);

    // JS
    wp_register_script($this->slug, '', [], false, true);
    $prices = $this->prices;
    $localized = [
      'prices' => $prices,
      'defaultVAT' => 23,
      'currency' => 'zł',
      'thousand' => ' ',
      'decimal' => ',',
    ];
    wp_add_inline_script($this->slug, 'window.ITR_MC = '.wp_json_encode($localized).';');

    $js = <<<'JS'
(function(){
  const fmt = (n)=>{
    if(isNaN(n)) n = 0;
    return n.toLocaleString('pl-PL', {minimumFractionDigits:2, maximumFractionDigits:2});
  };

  function recalc(root){
    const vat = parseFloat(root.querySelector('[data-vat]')?.value || '23');
    const rows = root.querySelectorAll('[data-row]');
    let sumSprzet = 0, sumUsluga = 0;

    rows.forEach(row=>{
      const key = row.getAttribute('data-key');
      const price = parseFloat(row.getAttribute('data-price'));
      const isFlat = row.hasAttribute('data-flat');
      let qty = parseFloat(row.querySelector('input')?.value || '0');
      if(isFlat){ qty = qty > 0 ? 1 : 0; }
      const line = price * qty;
      row.querySelector('[data-line]')?.innerText = fmt(line);

      if(row.getAttribute('data-group')==='sprzet') sumSprzet += line; else sumUsluga += line;
    });

    const netto = sumSprzet + sumUsluga;
    const vatAmt = netto * (vat/100);
    const brutto = netto + vatAmt;

    root.querySelector('[data-sprzet]')!.innerText = fmt(sumSprzet);
    root.querySelector('[data-usluga]')!.innerText = fmt(sumUsluga);
    root.querySelector('[data-netto]')!.innerText = fmt(netto);
    root.querySelector('[data-vat-amt]')!.innerText = fmt(vatAmt);
    root.querySelector('[data-brutto]')!.innerText = fmt(brutto);
  }

  function mount(){
    document.querySelectorAll('.itr-mc').forEach(root=>{
      root.addEventListener('input', ()=>recalc(root), {passive:true});
      recalc(root);
    });
  }

  if(document.readyState==='complete' || document.readyState==='interactive') setTimeout(mount,0); else document.addEventListener('DOMContentLoaded', mount);
})();
JS;
    wp_add_inline_script($this->slug, $js);
  }

  public function render_shortcode($atts){
    wp_enqueue_style($this->slug);
    wp_enqueue_script($this->slug);

    $vat_default = 23; // możesz zmienić na inny domyślny

    ob_start(); ?>
    <div class="itr-mc" role="form" aria-label="Kalkulator kosztu monitoringu">
      <h3>Kalkulator kosztu monitoringu</h3>
      <div class="vat">
        <label for="itr-mc-vat">Stawka VAT (%)</label>
        <input id="itr-mc-vat" type="number" step="1" min="0" max="99" value="<?php echo esc_attr($vat_default); ?>" data-vat />
        <small>Zmodyfikuj, jeśli stosujesz inną stawkę.</small>
      </div>

      <table>
        <thead>
          <tr>
            <th>Pozycja</th>
            <th>JM</th>
            <th>Cena jedn. netto</th>
            <th>Ilość</th>
            <th class="right">Wartość netto</th>
          </tr>
        </thead>
        <tbody>
          <tr><td class="group" colspan="5">Sprzęt</td></tr>
          <?php foreach($this->prices as $key=>$row): if($row['group']!== 'sprzet') continue; ?>
            <tr data-row data-group="sprzet" data-key="<?php echo esc_attr($key); ?>" data-price="<?php echo esc_attr($row['price']); ?>">
              <td><?php echo esc_html($row['label']); ?></td>
              <td><?php echo esc_html($row['unit']); ?></td>
              <td><?php echo number_format($row['price'],2,',',' '); ?> zł</td>
              <td>
                <input type="number" step="1" min="0" placeholder="0" aria-label="Ilość: <?php echo esc_attr($row['label']); ?>" />
              </td>
              <td class="right"><span data-line>0,00</span> zł</td>
            </tr>
          <?php endforeach; ?>

          <tr><td class="group" colspan="5">Usługa</td></tr>
          <?php foreach($this->prices as $key=>$row): if($row['group']!== 'usluga') continue; ?>
            <tr data-row data-group="usluga" data-key="<?php echo esc_attr($key); ?>" data-price="<?php echo esc_attr($row['price']); ?>" <?php echo !empty($row['is_flat']) ? 'data-flat' : '';?>>
              <td><?php echo esc_html($row['label']); ?></td>
              <td><?php echo esc_html($row['unit']); ?></td>
              <td><?php echo number_format($row['price'],2,',',' '); ?> zł</td>
              <td>
                <?php if(!empty($row['is_flat'])): ?>
                  <input type="number" step="1" min="0" max="1" placeholder="0" aria-label="Dodaj pozycję: <?php echo esc_attr($row['label']); ?>" />
                  <small class="muted">0 = nie liczy, 1 = dolicz</small>
                <?php else: ?>
                  <input type="number" step="1" min="0" placeholder="0" aria-label="Ilość: <?php echo esc_attr($row['label']); ?>" />
                <?php endif; ?>
              </td>
              <td class="right"><span data-line>0,00</span> zł</td>
            </tr>
          <?php endforeach; ?>
        </tbody>
      </table>

      <div class="totals">
        <div class="card"><strong>Sprzęt (netto):</strong> <span class="right" style="float:right" data-sprzet>0,00</span> zł</div>
        <div class="card"><strong>Usługa (netto):</strong> <span class="right" style="float:right" data-usluga>0,00</span> zł</div>
        <div class="card"><strong>Suma netto:</strong> <span class="right" style="float:right" data-netto>0,00</span> zł</div>
        <div class="card"><strong>VAT:</strong> <span class="right" style="float:right" data-vat-amt>0,00</span> zł</div>
        <div class="card" style="grid-column:1 / -1"><strong>Suma brutto:</strong> <span class="right" style="float:right" data-brutto>0,00</span> zł</div>
      </div>

      <a href="#" class="btn" onclick="window.print();return false;">Wydrukuj / Zapisz do PDF</a>
      <small class="muted" style="display:block;margin-top:8px">Wyliczenia mają charakter orientacyjny.</small>
    </div>
    <?php
    return ob_get_clean();
  }
}

new ITR_Monitoring_Calculator();