<?php

/**
 * BOHA Automation - Offers PDF Export (Print-ready HTML)
 *
 * Returns a self-contained HTML page that auto-triggers window.print().
 * The browser's "Save as PDF" produces the final PDF.
 *
 * GET /api/admin/offers-pdf.php?id=X - Returns print-ready HTML
 */

declare(strict_types=1);

require_once dirname(__DIR__) . '/config.php';
require_once dirname(__DIR__) . '/includes/JWTAuth.php';
setCorsHeaders();
setSecurityHeaders();

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(200);
    exit();
}

if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
    header('Content-Type: application/json; charset=utf-8');
    errorResponse('Metoda není povolena', 405);
}

$authData = JWTAuth::requireAuth();
requirePermission($authData, 'offers.export');

$id = isset($_GET['id']) ? (int)$_GET['id'] : null;
if (!$id) {
    header('Content-Type: application/json; charset=utf-8');
    errorResponse('ID nabídky je povinné');
}

try {
    $pdo = db();

    $stmt = $pdo->prepare('SELECT * FROM quotations WHERE id = ?');
    $stmt->execute([$id]);
    $quotation = $stmt->fetch();
    if (!$quotation) {
        header('Content-Type: application/json; charset=utf-8');
        errorResponse('Nabídka nebyla nalezena', 404);
    }

    $customer = null;
    if ($quotation['customer_id']) {
        $stmt = $pdo->prepare('SELECT * FROM customers WHERE id = ?');
        $stmt->execute([$quotation['customer_id']]);
        $customer = $stmt->fetch();
    }

    $stmt = $pdo->prepare('SELECT * FROM quotation_items WHERE quotation_id = ? ORDER BY position');
    $stmt->execute([$id]);
    $items = $stmt->fetchAll();

    $stmt = $pdo->prepare('SELECT * FROM scope_sections WHERE quotation_id = ? ORDER BY position');
    $stmt->execute([$id]);
    $sections = $stmt->fetchAll();

    $stmt = $pdo->query('SELECT * FROM company_settings LIMIT 1');
    $settings = $stmt->fetch();

    $logoBase64 = '';
    $logoMime = 'image/png';
    if (!empty($settings['logo_data'])) {
        $logoBase64 = base64_encode($settings['logo_data']);
        $finfo = new finfo(FILEINFO_MIME_TYPE);
        $detected = $finfo->buffer($settings['logo_data']);
        $allowedMimes = ['image/png', 'image/jpeg', 'image/gif', 'image/webp'];
        if ($detected && in_array($detected, $allowedMimes)) {
            $logoMime = $detected;
        }
    }

    // ---------------------------------------------------------------------------
    // Helpers
    // ---------------------------------------------------------------------------
    $isCzech = ($quotation['language'] ?? 'EN') === 'CZ';
    $currency = $quotation['currency'] ?? 'EUR';

    $translations = [
        'title'         => ['EN' => 'PRICE QUOTATION',       'CZ' => 'CENOVÁ NABÍDKA'],
        'scope_title'   => ['EN' => 'SCOPE OF THE PROJECT',  'CZ' => 'ROZSAH PROJEKTU'],
        'valid_until'   => ['EN' => 'Valid until',            'CZ' => 'Platnost do'],
        'customer'      => ['EN' => 'Customer',               'CZ' => 'Zákazník'],
        'supplier'      => ['EN' => 'Supplier',               'CZ' => 'Dodavatel'],
        'no'            => ['EN' => 'N.',                      'CZ' => 'Č.'],
        'description'   => ['EN' => 'Description',             'CZ' => 'Popis'],
        'qty'           => ['EN' => 'Qty',                     'CZ' => 'Mn.'],
        'unit_price'    => ['EN' => 'Unit Price',              'CZ' => 'Jedn. cena'],
        'included'      => ['EN' => 'Included',                'CZ' => 'Zahrnuto'],
        'total'         => ['EN' => 'Total',                   'CZ' => 'Celkem'],
        'subtotal'      => ['EN' => 'Subtotal',                'CZ' => 'Mezisoučet'],
        'vat'           => ['EN' => 'VAT',                     'CZ' => 'DPH'],
        'total_to_pay'  => ['EN' => 'Total to pay',            'CZ' => 'Celkem k úhradě'],
        'exchange_rate' => ['EN' => 'Exchange rate',            'CZ' => 'Směnný kurz'],
        'ico'           => ['EN' => 'ID',                      'CZ' => 'IČO'],
        'dic'           => ['EN' => 'VAT ID',                  'CZ' => 'DIČ'],
        'yes'           => ['EN' => 'Yes',                     'CZ' => 'Ano'],
        'no_val'        => ['EN' => 'No',                      'CZ' => 'Ne'],
        'page'          => ['EN' => 'Page',                    'CZ' => 'Strana'],
        'of'            => ['EN' => 'of',                      'CZ' => 'z'],
    ];

    $lang = $isCzech ? 'CZ' : 'EN';
    $t = function ($key) use ($translations, $lang) {
        return $translations[$key][$lang] ?? $key;
    };

    $formatNum = function ($number, $decimals, $decSep = ',', $thousandSep = "\xC2\xA0") {
        $fixed = number_format(abs($number), $decimals, '.', '');
        $parts = explode('.', $fixed);
        $intPart = preg_replace('/\B(?=(\d{3})+(?!\d))/', $thousandSep, $parts[0]);
        $result = isset($parts[1]) ? $intPart . $decSep . $parts[1] : $intPart;
        return $number < 0 ? '-' . $result : $result;
    };

    $formatCurrency = function ($amount) use ($currency, $formatNum) {
        $n = floatval($amount);
        switch ($currency) {
            case 'EUR':
                return $formatNum($n, 2, ',', "\xC2\xA0") . ' €';
            case 'USD':
                return '$' . $formatNum($n, 2, '.', ',');
            case 'CZK':
                return $formatNum($n, 2, ',', "\xC2\xA0") . ' Kč';
            case 'GBP':
                return '£' . $formatNum($n, 2, '.', ',');
            default:
                return $formatNum($n, 2, ',', "\xC2\xA0") . ' ' . $currency;
        }
    };

    $formatDate = function ($dateStr) {
        if (!$dateStr) {
            return '';
        }
        $d = strtotime($dateStr);
        if ($d === false) {
            return $dateStr;
        }
        return date('d.m.Y', $d);
    };

    $esc = function ($str) {
        return htmlspecialchars($str ?? '', ENT_QUOTES, 'UTF-8');
    };

    $buildAddressLines = function ($entity, $isSupplier) use ($t) {
        if (!$entity) {
            return ['name' => '', 'lines' => []];
        }

        $nameKey = $isSupplier ? 'company_name' : 'name';
        $name = $entity[$nameKey] ?? '';

        $cfData = [];
        $fieldOrder = null;
        $raw = $entity['custom_fields'] ?? null;
        if ($raw) {
            $parsed = is_string($raw) ? json_decode($raw, true) : $raw;
            if (isset($parsed['fields'])) {
                $cfData = $parsed['fields'] ?? [];
                $fieldOrder = $parsed['field_order'] ?? $parsed['fieldOrder'] ?? null;
            } elseif (is_array($parsed) && isset($parsed[0])) {
                $cfData = $parsed;
            }
        }
        // Zpetna kompatibilita - stare DB zaznamy maji PascalCase klice
        if (is_array($fieldOrder)) {
            $legacyMap = [
                'Name' => 'name', 'CompanyName' => 'company_name',
                'Street' => 'street', 'CityPostal' => 'city_postal',
                'Country' => 'country', 'CompanyId' => 'company_id', 'VatId' => 'vat_id',
            ];
            $fieldOrder = array_map(fn ($k) => $legacyMap[$k] ?? $k, $fieldOrder);
        }

        $fieldMap = [];
        if ($name) {
            $fieldMap[$nameKey] = $name;
        }
        if (!empty($entity['street'])) {
            $fieldMap['street'] = $entity['street'];
        }
        $cityParts = array_filter([$entity['city'] ?? '', $entity['postal_code'] ?? '']);
        $cityPostal = trim(implode(' ', $cityParts));
        if ($cityPostal) {
            $fieldMap['city_postal'] = $cityPostal;
        }
        if (!empty($entity['country'])) {
            $fieldMap['country'] = $entity['country'];
        }
        if (!empty($entity['company_id'])) {
            $fieldMap['company_id'] = $t('ico') . ': ' . $entity['company_id'];
        }
        if (!empty($entity['vat_id'])) {
            $fieldMap['vat_id'] = $t('dic') . ': ' . $entity['vat_id'];
        }

        foreach ($cfData as $i => $cf) {
            $cfName = trim($cf['name'] ?? '');
            $cfValue = trim($cf['value'] ?? '');
            $showLabel = $cf['showLabel'] ?? true;
            if ($cfValue) {
                $fieldMap["custom_{$i}"] = ($showLabel && $cfName) ? "{$cfName}: {$cfValue}" : $cfValue;
            }
        }

        $lines = [];
        if (is_array($fieldOrder) && count($fieldOrder)) {
            foreach ($fieldOrder as $key) {
                if ($key === $nameKey) {
                    continue;
                }
                if (isset($fieldMap[$key])) {
                    $lines[] = $fieldMap[$key];
                }
            }
            foreach ($fieldMap as $key => $line) {
                if ($key === $nameKey) {
                    continue;
                }
                if (!in_array($key, $fieldOrder)) {
                    $lines[] = $line;
                }
            }
        } else {
            foreach ($fieldMap as $key => $line) {
                if ($key === $nameKey) {
                    continue;
                }
                $lines[] = $line;
            }
        }

        return ['name' => $name, 'lines' => $lines];
    };

    $logoImg = '';
    if ($logoBase64) {
        $logoImg = '<img src="data:' . $esc($logoMime) . ';base64,' . $logoBase64 . '" class="logo" />';
    }

    $subtotal = 0;
    foreach ($items as $item) {
        $included = $item['is_included_in_total'] ?? 1;
        if ($included) {
            $subtotal += (floatval($item['quantity']) ?: 0) * (floatval($item['unit_price']) ?: 0);
        }
    }

    $applyVat = !empty($quotation['apply_vat']);
    $vatRate = floatval($quotation['vat_rate'] ?? 21) ?: 21;
    $vatAmount = $applyVat ? $subtotal * ($vatRate / 100) : 0;
    $totalToPay = $subtotal + $vatAmount;
    $exchangeRate = floatval($quotation['exchange_rate'] ?? 0);
    $vatMode = $applyVat ? 'standard' : 'exempt';

    $hasScopeContent = false;
    foreach ($sections as $s) {
        if (trim($s['content'] ?? '') || trim($s['title'] ?? '')) {
            $hasScopeContent = true;
            break;
        }
    }

    $sectionTitle = function ($section) use ($isCzech) {
        if ($isCzech && !empty(trim($section['title_cz'] ?? ''))) {
            return $section['title_cz'];
        }
        return $section['title'] ?? '';
    };

    /**
     * Merge adjacent <span> tags with identical attributes produced by Quill.
     * Quill sometimes splits a single word across multiple <span> elements
     * when cursor operations occur mid-word, creating spurious line-break
     * opportunities in the PDF renderer.
     */
    $cleanQuillHtml = function (string $html): string {
        // Sanitizace - povolit jen bezpecne HTML tagy z Quill editoru
        $allowedTags = '<p><br><strong><em><u><s><ul><ol><li>'
            . '<span><sub><sup><a><h1><h2><h3><h4><blockquote><pre>';
        $html = strip_tags($html, $allowedTags);

        // Odstranit event handlery (quoted i unquoted hodnoty)
        $html = preg_replace('/\s+on\w+\s*=\s*["\'][^"\']*["\']/i', '', $html);
        $html = preg_replace('/\s+on\w+\s*=\s*[^\s>]*/i', '', $html);
        // Odstranit javascript: v href a jinych atributech
        $html = preg_replace('/href\s*=\s*["\']?\s*javascript\s*:[^"\'>\s]*/i', 'href="#"', $html);
        $html = preg_replace('/\s+javascript\s*:/i', '', $html);

        // Replace &nbsp; with regular spaces in text content (not inside tags)
        $html = preg_replace_callback(
            '/(<[^>]*>)|(&nbsp;)/u',
            function ($m) {
                if (!empty($m[1])) {
                    return $m[1];
                }
                return ' ';
            },
            $html
        );

        // Merge adjacent spans with the same attributes
        $prev = null;
        while ($prev !== $html) {
            $prev = $html;
            $html = preg_replace_callback(
                '/<span([^>]*)>(.*?)<\/span>\s*<span(\1)>/su',
                fn ($m) => '<span' . $m[1] . '>' . $m[2],
                $html
            );
        }
        return $html;
    };

    $cust = $buildAddressLines($customer, false);
    $supp = $buildAddressLines($settings, true);

    $indentCSS = '';
    for ($n = 1; $n <= 9; $n++) {
        $pad = $n * 3;
        $liPad = $n * 3 + 1.5;
        $indentCSS .= "  .ql-indent-{$n} { padding-left: {$pad}em; }\n";
        $indentCSS .= "  li.ql-indent-{$n} { padding-left: {$liPad}em; }\n";
    }

    $itemsHtml = '';
    foreach ($items as $i => $item) {
        $lineTotal = (floatval($item['quantity']) ?: 0) * (floatval($item['unit_price']) ?: 0);
        $subDesc = $item['item_description'] ?? '';
        $rowNum = $i + 1;
        $evenClass = ($i % 2 === 1) ? ' class="even"' : '';
        $itemsHtml .= '<tr' . $evenClass . '>
            <td class="row-num">' . $rowNum . '</td>
            <td class="desc">' . $esc($item['description'] ?? '')
                . ($subDesc ? '<div class="item-subdesc">' . $esc($subDesc) . '</div>' : '') . '</td>
            <td class="center">' . $formatNum(floatval($item['quantity']) ?: 1, 0)
                . (!empty(trim($item['unit'] ?? '')) ? ' / ' . $esc(trim($item['unit'])) : '') . '</td>
            <td class="right">' . $formatCurrency($item['unit_price'] ?? 0) . '</td>
            <td class="right total-cell">' . $formatCurrency($lineTotal) . '</td>
          </tr>';
    }

    $totalsHtml = '';
    if ($vatMode === 'standard') {
        $totalsHtml .= '<div class="detail-rows">
          <div class="row">
            <span class="label">' . $esc($t('subtotal')) . ':</span>
            <span class="value">' . $formatCurrency($subtotal) . '</span>
          </div>
          <div class="row">
            <span class="label">' . $esc($t('vat')) . ' (' . intval($vatRate) . '%):</span>
            <span class="value">' . $formatCurrency($vatAmount) . '</span>
          </div>
        </div>';
    }
    $totalsHtml .= '<div class="grand">
      <span class="label">' . $esc($t('total_to_pay')) . '</span>
      <span class="value">' . $formatCurrency($totalToPay) . '</span>
    </div>';
    if ($exchangeRate > 0) {
        $totalsHtml .= '<div class="exchange-rate">'
            . $esc($t('exchange_rate')) . ': ' . $formatNum($exchangeRate, 4) . '</div>';
    }

    $scopeHtml = '';
    if ($hasScopeContent) {
        $scopeHtml .= '<div class="scope-page">';
        $scopeHtml .= '<div class="page-header">
            <div class="left">
              <div class="page-title">' . $esc($t('scope_title')) . '</div>';
        if (!empty($quotation['scope_title'])) {
            $scopeHtml .= '<div class="scope-subtitle">' . $esc($quotation['scope_title']) . '</div>';
        }
        if (!empty($quotation['scope_description'])) {
            $scopeHtml .= '<div class="scope-description">' . $esc($quotation['scope_description']) . '</div>';
        }
        $scopeHtml .= '</div>';
        if ($logoImg) {
            $scopeHtml .= '<div class="right"><div class="logo-header">' . $logoImg . '</div></div>';
        }
        $scopeHtml .= '</div>
          <hr class="separator" />';

        foreach ($sections as $section) {
            $title = $sectionTitle($section);
            $content = trim($section['content'] ?? '');
            if (!$title && !$content) {
                continue;
            }
            $scopeHtml .= '<div class="scope-section">';
            if ($title) {
                $scopeHtml .= '<div class="scope-section-title">' . $esc($title) . '</div>';
            }
            if ($content) {
                $scopeHtml .= '<div class="section-content">' . $cleanQuillHtml($content) . '</div>';
            }
            $scopeHtml .= '</div>';
        }
        $scopeHtml .= '</div>';
    }

    $custLinesHtml = '';
    foreach ($cust['lines'] as $line) {
        $custLinesHtml .= '<div class="address-line">' . $esc($line) . '</div>';
    }

    $suppLinesHtml = '';
    foreach ($supp['lines'] as $line) {
        $suppLinesHtml .= '<div class="address-line">' . $esc($line) . '</div>';
    }

    $pageLabel = $t('page');
    $ofLabel = $t('of');
    $quotationNumber = $esc($quotation['quotation_number'] ?? '');

    // ---------------------------------------------------------------------------
    // Build final HTML
    // ---------------------------------------------------------------------------
    $html = '<!DOCTYPE html>
<html lang="' . ($isCzech ? 'cs' : 'en') . '">
<head>
<meta charset="utf-8" />
<title>' . $quotationNumber . '</title>
<link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
<link rel="shortcut icon" href="/favicon.ico">
<style>
  /* ---- Base ---- */
  @page {
    size: A4;
    margin: 15mm 15mm 25mm 15mm;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html, body {
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    font-size: 10pt;
    color: #1a1a1a;
    width: 180mm;
  }

  /* Prevent any element from exceeding content width */
  img, table, pre, code { max-width: 100%; }

  /* ---- Quill font classes ---- */
  .ql-font-arial            { font-family: Arial, sans-serif; }
  .ql-font-tahoma           { font-family: Tahoma, sans-serif; }
  .ql-font-verdana          { font-family: Verdana, sans-serif; }
  .ql-font-georgia          { font-family: Georgia, serif; }
  .ql-font-times-new-roman  { font-family: "Times New Roman", serif; }
  .ql-font-courier-new      { font-family: "Courier New", monospace; }
  .ql-font-trebuchet-ms     { font-family: "Trebuchet MS", sans-serif; }
  .ql-font-impact           { font-family: Impact, sans-serif; }
  .ql-font-comic-sans-ms    { font-family: "Comic Sans MS", cursive; }
  .ql-font-lucida-console   { font-family: "Lucida Console", monospace; }
  .ql-font-palatino-linotype{ font-family: "Palatino Linotype", serif; }
  .ql-font-garamond         { font-family: Garamond, serif; }

  /* ---- Quill alignment ---- */
  .ql-align-center  { text-align: center; }
  .ql-align-right   { text-align: right; }
  .ql-align-justify { text-align: justify; }

  /* ---- Quill indentation ---- */
' . $indentCSS . '

  /* ---- Page header ---- */
  .page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 4mm;
  }
  .page-header .left { flex: 1; }
  .page-header .right { flex-shrink: 0; margin-left: 10mm; }
  .logo { max-width: 42mm; max-height: 22mm; object-fit: contain; }

  .page-title {
    font-size: 18pt;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
  }
  .scope-page .page-title { font-size: 16pt; }
  .quotation-number {
    font-size: 12pt;
    color: #1a1a1a;
    margin: 1mm 0;
  }
  .project-code {
    font-size: 10pt;
    color: #646464;
  }
  .valid-until {
    font-size: 9pt;
    color: #646464;
    margin-top: 1mm;
  }
  .scope-subtitle {
    font-size: 11pt;
    color: #646464;
    margin-top: 1mm;
  }
  .scope-description {
    font-size: 9pt;
    color: #646464;
    margin-top: 1mm;
  }

  .separator {
    border: none;
    border-top: 0.5pt solid #e0e0e0;
    margin: 3mm 0 5mm 0;
  }

  /* ---- Addresses ---- */
  .addresses {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8mm;
  }
  .address-block { width: 48%; }
  .address-block.right { text-align: right; }
  .address-label {
    font-size: 9pt;
    font-weight: bold;
    color: #646464;
    line-height: 1.5;
  }
  .address-name {
    font-size: 9pt;
    font-weight: bold;
    color: #1a1a1a;
    line-height: 1.5;
  }
  .address-line {
    font-size: 9pt;
    color: #646464;
    line-height: 1.5;
  }

  /* ---- Items table ---- */
  table.items {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    font-size: 9pt;
    margin-bottom: 2mm;
  }
  table.items thead th {
    font-size: 8pt;
    font-weight: 600;
    color: #646464;
    padding: 6px 8px;
    text-align: left;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border-bottom: 1pt solid #1a1a1a;
  }
  table.items thead th.center { text-align: center; }
  table.items thead th.right  { text-align: right; }

  table.items tbody td {
    padding: 7px 8px;
    border-bottom: 0.5pt solid #e0e0e0;
    vertical-align: middle;
    word-wrap: break-word;
    overflow-wrap: break-word;
    color: #1a1a1a;
  }
  table.items tbody tr:nth-child(even) { background: #f8f9fa; }
  table.items tbody td.center { text-align: center; white-space: nowrap; }
  table.items tbody td.right  { text-align: right; }
  table.items tbody td.row-num {
    text-align: center;
    color: #969696;
    font-size: 8pt;
  }
  table.items tbody td.desc {
    font-size: 10pt;
    font-weight: 500;
    color: #1a1a1a;
  }
  table.items tbody td.total-cell {
    font-weight: 700;
  }
  .item-subdesc {
    font-size: 9pt;
    color: #646464;
    margin-top: 2px;
    font-weight: 400;
  }

  /* ---- Totals ---- */
  .totals-wrapper {
    display: flex;
    justify-content: flex-end;
    break-inside: avoid;
    margin-top: 8mm;
  }
  .totals {
    width: 80mm;
  }
  .totals .detail-rows {
    margin-bottom: 3mm;
  }
  .totals .row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 8.5pt;
    color: #646464;
    margin-bottom: 2mm;
  }
  .totals .row:last-child { margin-bottom: 0; }
  .totals .row .value {
    color: #1a1a1a;
    font-size: 8.5pt;
  }
  .totals .grand {
    border-top: 0.5pt solid #e0e0e0;
    padding-top: 4mm;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
  }
  .totals .grand .label {
    font-size: 9.5pt;
    font-weight: 400;
    color: #646464;
    align-self: center;
  }
  .totals .grand .value {
    font-size: 14pt;
    font-weight: 600;
    color: #1a1a1a;
    border-bottom: 2.5pt solid #de3a3a;
    padding-bottom: 1mm;
  }
  .totals .exchange-rate {
    text-align: right;
    font-size: 7.5pt;
    color: #969696;
    margin-top: 3mm;
  }

  /* ---- Scope sections ---- */
  .scope-page {
    page-break-before: always;
  }
.scope-section {
    width: 100%;
    max-width: 100%;
    margin-bottom: 3mm;
    break-inside: avoid;
  }
  .scope-section-title {
    font-size: 11pt;
    font-weight: bold;
    color: #1a1a1a;
    margin-bottom: 1mm;
  }
  .section-content {
    font-size: 9pt;
    color: #1a1a1a;
    line-height: 1.5;
    word-break: normal;
    overflow-wrap: anywhere;
  }
  .section-content p { margin: 0 0 0.4em 0; }
  .section-content ul, .section-content ol { margin: 0 0 0.4em 1.5em; }
  .section-content li { margin-bottom: 0.2em; }

  /* ---- Repeating page header ---- */
  table.page-layout {
    width: 100%;
    border-collapse: collapse;
  }
  table.page-layout > thead > tr > td,
  table.page-layout > tbody > tr > td {
    padding: 0;
    border: none;
    vertical-align: top;
  }
  .logo-header {
    text-align: right;
    padding-bottom: 4mm;
  }
  .first-content {
    margin-top: -26mm;
  }

  /* ---- Page break helpers ---- */
  table.page-layout thead { display: table-header-group; }
  table.items tbody tr { break-inside: avoid; }

  @media print {
    body {
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }

    @page {
      @bottom-center {
        content: "' . $esc($pageLabel) . ' " counter(page) " ' . $esc($ofLabel) . ' " counter(pages);
        font-size: 8pt;
        color: #969696;
        font-family: "Segoe UI", Tahoma, Arial, sans-serif;
      }
    }
  }

  /* ---- Screen-only: A4 page preview ---- */
  @media screen {
    html {
      background: #525659;
    }
    body {
      width: 100vw !important;
      margin: 0;
      padding: 30px 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 30px;
      min-height: 100vh;
      overflow-x: hidden;
    }
    .quotation-page, .scope-page {
      width: 210mm;
      min-height: 297mm;
      padding: 15mm;
      background: white;
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
      box-sizing: border-box;
      border-radius: 2px;
    }
    /* On screen: neutralize the table layout used for print repeating headers (quotation page only) */
    table.page-layout,
    table.page-layout > thead,
    table.page-layout > thead > tr,
    table.page-layout > thead > tr > td,
    table.page-layout > tbody,
    table.page-layout > tbody > tr,
    table.page-layout > tbody > tr > td {
      display: block;
      width: 100%;
    }
    /* On screen: undo print-specific hacks */
    .first-content {
      margin-top: 0 !important;
    }
    /* On screen: show logo-header normally as right-aligned block */
    .logo-header {
      text-align: right;
      padding-bottom: 0;
      margin-bottom: -18mm;
    }
  }
</style>
</head>
<body>

  <!-- ============ QUOTATION (logo repeats via thead, full header only on first page) ============ -->
  <div class="quotation-page">
  <table class="page-layout">
    <thead>
      <tr><td>
        <div class="logo-header">' . $logoImg . '</div>
      </td></tr>
    </thead>
    <tbody>
      <tr><td>
        <div class="first-content">
        <div class="page-header">
          <div class="left">
            <div class="page-title">' . $esc($t('title')) . '</div>
            <div class="quotation-number">' . $quotationNumber . '</div>
            ' . (!empty($quotation['project_code'])
                ? '<div class="project-code">' . $esc($quotation['project_code']) . '</div>'
                : '') . '
            <div class="valid-until">' . $esc($t('valid_until')) . ': '
                . $esc($formatDate($quotation['valid_until'] ?? '')) . '</div>
          </div>
        </div>
        <hr class="separator" />

        <div class="addresses">
          <div class="address-block left">
            <div class="address-label">' . $esc($t('customer')) . '</div>
            <div class="address-name">' . $esc($cust['name']) . '</div>
            ' . $custLinesHtml . '
          </div>
          <div class="address-block right">
            <div class="address-label">' . $esc($t('supplier')) . '</div>
            <div class="address-name">' . $esc($supp['name']) . '</div>
            ' . $suppLinesHtml . '
          </div>
        </div>

        <table class="items">
          <thead>
            <tr>
              <th class="center" style="width:5%">' . $esc($t('no')) . '</th>
              <th style="width:44%">' . $esc($t('description')) . '</th>
              <th class="center" style="width:13%">' . $esc($t('qty')) . '</th>
              <th class="right" style="width:18%">' . $esc($t('unit_price')) . '</th>
              <th class="right" style="width:20%">' . $esc($t('total')) . '</th>
            </tr>
          </thead>
          <tbody>
            ' . $itemsHtml . '
          </tbody>
        </table>

        <div class="totals-wrapper">
          <div class="totals">
            ' . $totalsHtml . '
          </div>
        </div>
        </div>
      </td></tr>
    </tbody>
  </table>
  </div>

  ' . $scopeHtml . '

</body>
</html>';

    header('Content-Type: text/html; charset=utf-8');
    echo $html;
    exit();
} catch (PDOException $e) {
    error_log('Offers PDF API error: ' . $e->getMessage());
    header('Content-Type: application/json; charset=utf-8');
    if (DEBUG_MODE) {
        errorResponse('Chyba databáze: ' . $e->getMessage(), 500);
    } else {
        errorResponse('Chyba generování PDF', 500);
    }
} catch (Exception $e) {
    error_log('Offers PDF generation error: ' . $e->getMessage());
    header('Content-Type: application/json; charset=utf-8');
    if (DEBUG_MODE) {
        errorResponse('Chyba PDF: ' . $e->getMessage(), 500);
    } else {
        errorResponse('Chyba generování PDF', 500);
    }
}