import { FastifyInstance } from "fastify";
import QRCode from "qrcode";
import prisma from "../../config/database";
import { requirePermission } from "../../middleware/auth";
import { localDateCzStr } from "../../utils/date";
import { nasFinancialsManager } from "../../services/nas-financials-manager";
import { htmlToPdf } from "../../utils/html-to-pdf";
import { getRate } from "../../services/exchange-rates";
import { localDateStr } from "../../utils/date";

/* ── Helpers ─────────────────────────────────────────────────────── */

function formatDate(date: Date | string | null | undefined): string {
  if (!date) return "";
  const d = new Date(date);
  if (isNaN(d.getTime())) return String(date);
  return localDateCzStr(d);
}

function formatNum(n: number, decimals = 2): string {
  const abs = Math.abs(n);
  const fixed = abs.toFixed(decimals);
  const [intPart, decPart] = fixed.split(".");
  const withSep = intPart.replace(/\B(?=(\d{3})+(?!\d))/g, "\u00A0");
  const result = decPart ? `${withSep},${decPart}` : withSep;
  return n < 0 ? `-${result}` : result;
}

function escapeHtml(str: string | null | undefined): string {
  if (!str) return "";
  return str
    .replace(/&/g, "&amp;")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;");
}

function cleanQuillHtml(html: string | null | undefined): string {
  if (!html) return "";
  let s = html;
  s = s.replace(
    /<(script|iframe|object|embed|style|link|meta|base|form|input|textarea|button|select|svg|math)[^>]*>[\s\S]*?<\/\1>/gi,
    "",
  );
  s = s.replace(
    /<(script|iframe|object|embed|style|link|meta|base|form|input|textarea|button|select|svg|math)[^>]*\/?>/gi,
    "",
  );
  s = s.replace(/\s+on\w+\s*=\s*("[^"]*"|'[^']*'|[^\s>]*)/gi, "");
  s = s.replace(/\s+on\w+\s*=\s*[^\s>]*/gi, "");
  s = s.replace(/href\s*=\s*["']?\s*javascript\s*:[^"'>\s]*/gi, 'href="#"');
  s = s.replace(/(&nbsp;)/g, " ");
  let prev = "";
  while (prev !== s) {
    prev = s;
    s = s.replace(/<span([^>]*)>(.*?)<\/span>\s*<span\1>/gs, "<span$1>$2");
  }
  return s;
}

interface AddressResult {
  name: string;
  lines: string[];
}

function buildAddressLines(
  entity: Record<string, unknown> | null,
  isSupplier: boolean,
  tObj: Record<string, string>,
): AddressResult {
  if (!entity) return { name: "", lines: [] };

  const nameKey = isSupplier ? "company_name" : "name";
  const name = String(entity[nameKey] || "");

  let cfData: Array<{ name?: string; value?: string; showLabel?: boolean }> =
    [];
  let fieldOrder: string[] | null = null;
  const raw = entity.custom_fields;
  if (raw) {
    const parsed = typeof raw === "string" ? JSON.parse(raw) : raw;
    if (parsed && typeof parsed === "object") {
      if ((parsed as Record<string, unknown>).fields) {
        cfData =
          ((parsed as Record<string, unknown>).fields as typeof cfData) || [];
        fieldOrder = ((parsed as Record<string, unknown>).field_order ||
          (parsed as Record<string, unknown>).fieldOrder) as string[] | null;
      } else if (Array.isArray(parsed)) {
        cfData = parsed;
      }
    }
  }

  if (Array.isArray(fieldOrder)) {
    const legacyMap: Record<string, string> = {
      Name: "name",
      CompanyName: "company_name",
      Street: "street",
      CityPostal: "city_postal",
      Country: "country",
      CompanyId: "company_id",
      VatId: "vat_id",
    };
    fieldOrder = fieldOrder.map((k) => legacyMap[k] || k);
  }

  const fieldMap: Record<string, string> = {};
  if (name) fieldMap[nameKey] = name;
  if (entity.street) fieldMap.street = String(entity.street);
  const cityParts = [entity.city || "", entity.postal_code || ""]
    .filter(Boolean)
    .map(String);
  const cityPostal = cityParts.join(" ").trim();
  if (cityPostal) fieldMap.city_postal = cityPostal;
  if (entity.country) fieldMap.country = String(entity.country);
  if (entity.company_id)
    fieldMap.company_id = `${tObj.ico}${entity.company_id}`;
  if (entity.vat_id) fieldMap.vat_id = `${tObj.dic}${entity.vat_id}`;

  cfData.forEach((cf, i) => {
    const cfName = (cf.name || "").trim();
    const cfValue = (cf.value || "").trim();
    const showLabel = cf.showLabel !== false;
    if (cfValue) {
      fieldMap[`custom_${i}`] =
        showLabel && cfName ? `${cfName}: ${cfValue}` : cfValue;
    }
  });

  const lines: string[] = [];
  if (Array.isArray(fieldOrder) && fieldOrder.length) {
    for (const key of fieldOrder) {
      if (key === nameKey) continue;
      if (fieldMap[key]) lines.push(fieldMap[key]);
    }
    for (const [key, line] of Object.entries(fieldMap)) {
      if (key === nameKey) continue;
      if (!fieldOrder!.includes(key)) lines.push(line);
    }
  } else {
    for (const [key, line] of Object.entries(fieldMap)) {
      if (key === nameKey) continue;
      lines.push(line);
    }
  }

  return { name, lines };
}

/* ── Translations ────────────────────────────────────────────────── */

const translations: Record<string, Record<string, string>> = {
  cs: {
    title: "Faktura",
    heading: "FAKTURA - DAŇOVÝ DOKLAD č.",
    supplier: "Dodavatel",
    customer: "Odběratel",
    bank: "Banka:",
    swift: "SWIFT:",
    iban: "IBAN:",
    account_no: "Číslo účtu:",
    var_symbol: "Variabilní s.:",
    const_symbol: "Konstantní s.:",
    order_no: "Objednávka č.:",
    issue_date: "Datum vystavení:",
    due_date: "Datum splatnosti:",
    tax_date: "Datum uskutečnění plnění:",
    payment_method: "Forma úhrady:",
    billing: "Fakturujeme Vám za:",
    col_no: "Č.",
    col_desc: "Popis",
    col_qty: "Množství",
    col_unit_price: "Jedn. cena",
    col_price: "Cena",
    col_vat_pct: "%DPH",
    col_vat: "DPH",
    col_total: "Celkem",
    subtotal: "Mezisoučet:",
    vat_label: "DPH",
    total: "Celkem k úhradě",
    amounts_in: "Částky jsou uvedeny v",
    notes: "Poznámky",
    issued_by: "Vystavil:",
    notice:
      "Dovolujeme si Vás upozornit, že v případě nedodržení data splatnosti" +
      " uvedeného na faktuře Vám budeme účtovat úrok z prodlení v dohodnuté, resp." +
      " zákonné výši a smluvní pokutu (byla-li sjednána).",
    vat_recap: "Rekapitulace DPH v Kč:",
    vat_base: "Základ v Kč",
    vat_rate: "Sazba",
    vat_amount: "DPH v Kč",
    vat_with_total: "Celkem s DPH v Kč",
    received_by: "Převzal:",
    stamp: "Razítko:",
    ico: "IČ: ",
    dic: "DIČ: ",
  },
  en: {
    title: "Invoice",
    heading: "INVOICE - TAX DOCUMENT No.",
    supplier: "Supplier",
    customer: "Customer",
    bank: "Bank:",
    swift: "SWIFT:",
    iban: "IBAN:",
    account_no: "Account No.:",
    var_symbol: "Variable symbol:",
    const_symbol: "Constant symbol:",
    order_no: "Order No.:",
    issue_date: "Issue date:",
    due_date: "Due date:",
    tax_date: "Tax point date:",
    payment_method: "Payment method:",
    billing: "We invoice you for:",
    col_no: "No.",
    col_desc: "Description",
    col_qty: "Quantity",
    col_unit_price: "Unit price",
    col_price: "Price",
    col_vat_pct: "VAT%",
    col_vat: "VAT",
    col_total: "Total",
    subtotal: "Subtotal:",
    vat_label: "VAT",
    total: "Total to pay",
    amounts_in: "Amounts are in",
    notes: "Notes",
    issued_by: "Issued by:",
    notice:
      "Please note that in case of late payment, we will charge default interest" +
      " at the agreed or statutory rate and a contractual penalty (if agreed).",
    vat_recap: "VAT recapitulation in CZK:",
    vat_base: "Tax base in CZK",
    vat_rate: "Rate",
    vat_amount: "VAT in CZK",
    vat_with_total: "Total incl. VAT in CZK",
    received_by: "Received by:",
    stamp: "Stamp:",
    ico: "Reg. No.: ",
    dic: "Tax ID: ",
  },
};

/* ── Route ───────────────────────────────────────────────────────── */

export default async function invoicesPdfRoutes(
  fastify: FastifyInstance,
): Promise<void> {
  fastify.get<{ Params: { id: string } }>(
    "/:id",
    { preHandler: requirePermission("invoices.export") },
    async (request, reply) => {
      const id = parseInt(request.params.id, 10);
      const query = request.query as Record<string, string>;
      const lang = query.lang === "en" ? "en" : "cs";
      const t = translations[lang];

      const invoice = await prisma.invoices.findUnique({
        where: { id },
      });

      if (!invoice) {
        return reply
          .status(404)
          .type("text/html")
          .send("<html><body><h1>Faktura nenalezena</h1></body></html>");
      }

      const items = await prisma.invoice_items.findMany({
        where: { invoice_id: id },
        orderBy: { position: "asc" },
      });

      let customer: Record<string, unknown> | null = null;
      if (invoice.customer_id) {
        customer = (await prisma.customers.findUnique({
          where: { id: invoice.customer_id },
        })) as Record<string, unknown> | null;
      }

      const settings = (await prisma.company_settings.findFirst()) as Record<
        string,
        unknown
      > | null;

      let orderNumber = "";
      let orderDate = "";
      if (invoice.order_id) {
        const orderRow = await prisma.orders.findUnique({
          where: { id: invoice.order_id },
          select: {
            order_number: true,
            customer_order_number: true,
            created_at: true,
          },
        });
        if (orderRow) {
          orderNumber = escapeHtml(
            String(
              orderRow.customer_order_number || orderRow.order_number || "",
            ),
          );
          if (orderRow.created_at) {
            orderDate = formatDate(orderRow.created_at);
          }
        }
      }

      let logoImg = "";
      if (settings?.logo_data) {
        const buf = Buffer.from(settings.logo_data as Buffer);
        let mime = "image/png";
        if (buf[0] === 0xff && buf[1] === 0xd8) mime = "image/jpeg";
        else if (buf[0] === 0x47 && buf[1] === 0x49) mime = "image/gif";
        else if (buf[0] === 0x52 && buf[1] === 0x49) mime = "image/webp";
        const b64 = buf.toString("base64");
        logoImg = `<img src="data:${escapeHtml(mime)};base64,${b64}" class="logo" />`;
      }

      const currency = invoice.currency || "CZK";
      const applyVat = !!invoice.apply_vat;

      const vatSummary: Record<string, { base: number; vat: number }> = {};
      let subtotal = 0;

      for (const item of items) {
        const lineSubtotal = Number(item.quantity) * Number(item.unit_price);
        subtotal += lineSubtotal;
        const rate = Number(item.vat_rate);
        const key = String(rate);
        if (!vatSummary[key]) vatSummary[key] = { base: 0, vat: 0 };
        vatSummary[key].base += lineSubtotal;
        if (applyVat) {
          vatSummary[key].vat += (lineSubtotal * rate) / 100;
        }
      }

      let totalVat = 0;
      for (const data of Object.values(vatSummary)) {
        totalVat += data.vat;
      }
      const totalToPay = subtotal + totalVat;

      // QR code - SPAYD payment format
      let qrSvg = "";
      try {
        const spaydParts = [
          "SPD*1.0",
          "ACC:" + (invoice.bank_iban || "").replace(/ /g, ""),
          "AM:" + totalToPay.toFixed(2),
          "CC:" + currency,
          "X-VS:" + (invoice.invoice_number || ""),
          "X-KS:" + (invoice.constant_symbol || "0308"),
          "MSG:" + t.title + " " + (invoice.invoice_number || ""),
        ];
        const spaydString = spaydParts.join("*");
        qrSvg = await QRCode.toString(spaydString, {
          type: "svg",
          errorCorrectionLevel: "M",
          margin: 1,
          width: 200,
        });
      } catch {
        // QR generation failed — leave empty
      }

      // VAT recapitulation (always in CZK — Czech tax requirement)
      const isForeign = currency.toUpperCase() !== "CZK";
      const issueDateStr = invoice.issue_date
        ? localDateStr(new Date(invoice.issue_date))
        : undefined;
      const cnbRate = isForeign ? await getRate(currency, issueDateStr) : 1.0;
      const vatRates = [21, 12, 0];
      const vatRecap: Array<{
        rate: number;
        base: number;
        vat: number;
        total: number;
      }> = [];
      for (const rate of vatRates) {
        const key = String(rate);
        const base = vatSummary[key]?.base ?? 0;
        const vat = vatSummary[key]?.vat ?? 0;
        vatRecap.push({
          rate,
          base: Math.round(base * cnbRate * 100) / 100,
          vat: Math.round(vat * cnbRate * 100) / 100,
          total: Math.round((base + vat) * cnbRate * 100) / 100,
        });
      }

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

      const suppLinesHtml = supp.lines
        .map((l) => `<div class="address-line">${escapeHtml(l)}</div>`)
        .join("");
      const custLinesHtml = cust.lines
        .map((l) => `<div class="address-line">${escapeHtml(l)}</div>`)
        .join("");

      // Supplier email/web from custom_fields
      let suppEmail = "";
      if (settings?.custom_fields) {
        const raw = settings.custom_fields;
        const parsed = typeof raw === "string" ? JSON.parse(raw) : raw;
        if (parsed && typeof parsed === "object") {
          const fields = (parsed as Record<string, unknown>).fields;
          if (Array.isArray(fields)) {
            for (const f of fields) {
              if (f.name && f.name.toLowerCase() === "email" && f.value) {
                suppEmail = String(f.value);
              }
            }
          }
        }
      }

      const invoiceNumber = escapeHtml(invoice.invoice_number);

      const itemsHtml = items
        .map((item, i) => {
          const qty = Number(item.quantity);
          const unitPrice = Number(item.unit_price);
          const lineSubtotal = qty * unitPrice;
          const vatRate = Number(item.vat_rate);
          const lineVat = applyVat ? (lineSubtotal * vatRate) / 100 : 0;
          const lineTotal = lineSubtotal + lineVat;
          const qtyDecimals = Math.floor(qty) === qty ? 0 : 2;

          return `<tr>
            <td class="row-num">${i + 1}</td>
            <td class="desc">${escapeHtml(item.description)}</td>
            <td class="center">${formatNum(qty, qtyDecimals)}${item.unit ? ` / ${escapeHtml(item.unit)}` : ""}</td>
            <td class="right">${formatNum(unitPrice)}</td>
            <td class="right">${formatNum(lineSubtotal)}</td>
            <td class="center">${applyVat ? Math.floor(vatRate) : 0}%</td>
            <td class="right">${formatNum(lineVat)}</td>
            <td class="right total-cell">${formatNum(lineTotal)}</td>
        </tr>`;
        })
        .join("");

      const vatRecapHtml = vatRecap
        .map(
          (vr) => `<tr>
            <td class="right">${formatNum(vr.base)}</td>
            <td class="center">${Math.floor(vr.rate)}%</td>
            <td class="right">${formatNum(vr.vat)}</td>
            <td class="right">${formatNum(vr.total)}</td>
        </tr>`,
        )
        .join("");

      let vatDetailHtml = "";
      if (applyVat) {
        for (const [rate, data] of Object.entries(vatSummary)) {
          if (data.vat > 0) {
            vatDetailHtml += `
        <div class="row">
          <span class="label">${escapeHtml(t.vat_label)} ${Math.floor(Number(rate))}%:</span>
          <span class="value">${formatNum(data.vat)} ${escapeHtml(currency)}</span>
        </div>`;
          }
        }
      }

      const notesRaw = invoice.notes ?? "";
      const notesStripped = notesRaw.replace(/<[^>]*>/g, "").trim();
      const notesHtml = notesStripped
        ? `
  <!-- Poznamky -->
  <div class="invoice-notes">
    <div class="invoice-notes-label">${escapeHtml(t.notes)}</div>
    <div class="invoice-notes-content">${cleanQuillHtml(notesRaw)}</div>
  </div>
  `
        : "";

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

      const html = `<!DOCTYPE html>
<html lang="${escapeHtml(lang)}">
<head>
<meta charset="utf-8" />
<title>${escapeHtml(t.title)} ${invoiceNumber}</title>
<link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
<style>
  @page {
    size: A4;
    margin: 8mm 12mm 10mm 12mm;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html, body {
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    font-size: 10pt;
    color: #1a1a1a;
    width: 186mm;
  }

  .invoice-page {
    display: flex;
    flex-direction: column;
    min-height: calc(297mm - 27mm);
  }
  .invoice-content { flex: 1 1 auto; }
  .invoice-footer {
    flex-shrink: 0;
  }

  .accent { color: #de3a3a; }

  /* ── Hlavicka ── */
  .invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1mm;
    padding-bottom: 1mm;
    border-bottom: 2pt solid #de3a3a;
  }
  .invoice-header .left {
    display: flex;
    align-items: center;
    gap: 3mm;
  }
  .logo-header { text-align: left; }
  .company-title {
    font-size: 12pt;
    font-weight: 700;
  }
  .invoice-title {
    font-size: 13pt;
    font-weight: 700;
    color: #de3a3a;
    text-align: right;
    letter-spacing: 0.03em;
  }

  .logo {
    max-width: 42mm;
    max-height: 22mm;
    object-fit: contain;
  }

  /* ── Adresy ── */
  .header-grid {
    border: 0.5pt solid #d0d0d0;
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1mm;
  }
  .header-grid td {
    padding: 2mm 3mm;
    border: 0.5pt solid #d0d0d0;
    vertical-align: top;
    width: 50%;
  }
  .header-grid td.addr-customer {
    background: #f5f5f5;
  }
  .header-grid td.details-bank {
    background: #f5f5f5;
  }
  .address-label {
    font-size: 8pt;
    font-weight: 700;
    color: #de3a3a;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1mm;
  }
  .address-name {
    font-size: 10pt;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.3;
    margin-bottom: 1mm;
  }
  .address-line {
    font-size: 9pt;
    color: #444;
    line-height: 1.5;
  }

  /* ── Detaily (banka + datumy) — inside header-grid ── */

  .info-row {
    display: flex;
    align-items: baseline;
    font-size: 9pt;
    padding: 1mm 0;
    border-bottom: 0.5pt solid #f0f0f0;
  }
  .info-row:last-child { border-bottom: none; }
  .info-row .lbl {
    color: #666;
    font-weight: 400;
    flex-shrink: 0;
    white-space: nowrap;
    margin-right: 3mm;
  }
  .info-row .val {
    font-weight: 600;
    color: #1a1a1a;
    text-align: right;
    margin-left: auto;
  }

  /* VS/KS blok */
  .vs-block {
    font-size: 9pt;
    line-height: 1.4;
    padding-top: 2mm;
  }

  /* ── Polozky ── */
  .billing-label {
    font-weight: 700;
    color: #1a1a1a;
    font-size: 10pt;
    padding: 2mm 0 1mm 0;
    border-bottom: 1.5pt solid #de3a3a;
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 0.03em;
  }

  table.items {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    font-size: 9pt;
    margin-bottom: 2mm;
  }
  table.items thead th {
    font-size: 8.5pt;
    font-weight: 600;
    color: #646464;
    padding: 4px 4px;
    text-align: left;
    border-bottom: 0.5pt solid #d0d0d0;
    white-space: nowrap;
  }
  table.items thead th.center { text-align: center; }
  table.items thead th.right { text-align: right; }
  table.items tbody td {
    padding: 4px 4px;
    border-bottom: 0.5pt solid #e0e0e0;
    vertical-align: middle;
    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: 9pt;
  }
  table.items tbody td.desc {
    font-size: 9pt;
    font-weight: 600;
    color: #1a1a1a;
  }
  table.items tbody td.total-cell { font-weight: 700; }

  /* Soucet + total - styl z nabidek */
  .totals-wrapper {
    display: flex;
    justify-content: flex-end;
    margin-top: 2mm;
  }
  .totals {
    width: 80mm;
  }
  .totals .detail-rows {
    margin-bottom: 3mm;
  }
  .totals .row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 9.5pt;
    color: #1a1a1a;
    margin-bottom: 2mm;
  }
  .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: 10.5pt;
    font-weight: 400;
    color: #1a1a1a;
    align-self: center;
  }
  .totals .grand .value {
    font-size: 14pt;
    font-weight: 600;
    color: #1a1a1a;
    border-bottom: 2.5pt solid #de3a3a;
    padding-bottom: 1mm;
  }
  .totals .currency-note {
    text-align: right;
    font-size: 8pt;
    color: #1a1a1a;
    margin-top: 2mm;
  }

  /* Vystavil */
  .issued-by {
    font-size: 9pt;
    margin: 2mm 0;
    line-height: 1.4;
  }
  .issued-by .lbl { font-weight: 600; }

  /* Upozorneni */
  .notice {
    font-size: 8pt;
    color: #1a1a1a;
    margin: 2mm 0;
    line-height: 1.3;
  }

  /* DPH rekapitulace + QR */
  .recap-section {
    display: flex;
    gap: 5mm;
    align-items: flex-start;
    margin-top: 1mm;
  }
  .recap-section .qr {
    flex-shrink: 0;
    width: 28mm;
  }
  .recap-section .qr img,
  .recap-section .qr svg { width: 28mm; height: 28mm; }

  .recap-section table {
    border-collapse: collapse;
    font-size: 9pt;
    flex: 1;
  }
  .recap-section table th {
    font-size: 8pt;
    font-weight: 600;
    color: #555;
    padding: 3px 6px;
    text-align: right;
    border-bottom: 0.5pt solid #ccc;
  }
  .recap-section table td {
    padding: 3px 6px;
    text-align: right;
    border-bottom: 0.5pt solid #eee;
  }
  .recap-section table td.center { text-align: center; }
  .recap-section table td.cnb-rate {
    font-size: 8pt;
    color: #888;
    text-align: right;
    border-bottom: none;
    padding-top: 4px;
  }

  /* Prevzal / razitko */
  .footer-row {
    display: flex;
    justify-content: space-between;
    margin-top: 4mm;
    font-size: 9pt;
    border-top: 0.5pt solid #aaa;
    padding-top: 2mm;
    min-height: 15mm;
  }
  .footer-row .col {
    font-weight: 600;
    color: #555;
  }

  /* Poznamky */
  .invoice-notes {
    margin-top: 4mm;
    font-size: 10pt;
    line-height: 1.5;
    color: #1a1a1a;
  }
  .invoice-notes-label {
    font-weight: 600;
    font-size: 9pt;
    text-transform: uppercase;
    color: #555;
    margin-bottom: 1mm;
  }
  .invoice-notes-content p { margin: 0 0 0.4em 0; }
  .invoice-notes-content ul, .invoice-notes-content ol { margin: 0 0 0.4em 1.5em; }
  .invoice-notes-content li { margin-bottom: 0.2em; }

  /* Quill fonty */
  .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; }
  .ql-align-center  { text-align: center; }
  .ql-align-right   { text-align: right; }
  .ql-align-justify { text-align: justify; }
${indentCSS}

  @media print {
    body { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  }
  @media screen {
    html { background: #525659; }
    body {
      width: 100vw !important;
      margin: 0;
      padding: 30px 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100vh;
      overflow-x: hidden;
    }
    .invoice-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;
    }
  }
</style>
</head>
<body>
<div class="invoice-page">
<div class="invoice-content">

  <!-- Hlavicka -->
  <div class="invoice-header">
    <div class="left">
      ${logoImg ? `<div class="logo-header">${logoImg}</div>` : ""}
    </div>
    <div class="invoice-title">${escapeHtml(t.heading)} ${invoiceNumber}</div>
  </div>

  <!-- Dodavatel / Odberatel + Banka / Datumy -->
  <table class="header-grid" cellspacing="0">
    <tr>
      <td>
        <div class="address-label">${escapeHtml(t.supplier)}</div>
        <div class="address-name">${escapeHtml(supp.name)}</div>
        ${suppLinesHtml}
      </td>
      <td class="addr-customer">
        <div class="address-label">${escapeHtml(t.customer)}</div>
        <div class="address-name">${escapeHtml(cust.name)}</div>
        ${custLinesHtml}
      </td>
    </tr>
    <tr>
      <td class="details-bank">
        <div class="info-row"><span class="lbl">${escapeHtml(t.bank)}</span> <span class="val">${escapeHtml(invoice.bank_name)}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.swift)}</span> <span class="val">${escapeHtml(invoice.bank_swift)}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.iban)}</span> <span class="val">${escapeHtml(invoice.bank_iban)}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.account_no)}</span> <span class="val">${escapeHtml(invoice.bank_account)}</span></div>
        <div class="vs-block">
          ${escapeHtml(t.var_symbol)} <strong>${invoiceNumber}</strong>
          &nbsp;&nbsp;&nbsp; ${escapeHtml(t.const_symbol)} <strong>${escapeHtml(invoice.constant_symbol)}</strong>
        </div>
      </td>
      <td>
        <div class="info-row"><span class="lbl">${escapeHtml(t.issue_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.issue_date))}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.due_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.due_date))}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.tax_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.tax_date))}</span></div>
        <div class="info-row"><span class="lbl">${escapeHtml(t.payment_method)}</span> <span class="val">${escapeHtml(invoice.payment_method)}</span></div>
        ${orderNumber ? `<div class="info-row"><span class="lbl">${lang === "cs" ? "Objednávka č.:" : "Order no.:"}</span> <span class="val">${orderNumber}</span></div>` : ""}
        ${orderDate ? `<div class="info-row"><span class="lbl">${lang === "cs" ? "Objednávka ze dne:" : "Order date:"}</span> <span class="val">${escapeHtml(orderDate)}</span></div>` : ""}
      </td>
    </tr>
  </table>

  <!-- Polozky -->
  <div class="billing-label">${escapeHtml(invoice.billing_text || t.billing)}</div>
  <table class="items">
    <thead>
      <tr>
        <th class="center" style="width:3%">${escapeHtml(t.col_no)}</th>
        <th style="width:36%">${escapeHtml(t.col_desc)}</th>
        <th class="center" style="width:10%">${escapeHtml(t.col_qty)}</th>
        <th class="right" style="width:10%">${escapeHtml(t.col_unit_price)}</th>
        <th class="right" style="width:10%">${escapeHtml(t.col_price)}</th>
        <th class="center" style="width:5%">${escapeHtml(t.col_vat_pct)}</th>
        <th class="right" style="width:10%">${escapeHtml(t.col_vat)}</th>
        <th class="right" style="width:16%">${escapeHtml(t.col_total)}</th>
      </tr>
    </thead>
    <tbody>
      ${itemsHtml}
    </tbody>
  </table>

  <!-- Soucty -->
  <div class="totals-wrapper">
    <div class="totals">
      <div class="detail-rows">
        <div class="row">
          <span class="label">${escapeHtml(t.subtotal)}</span>
          <span class="value">${formatNum(subtotal)} ${escapeHtml(currency)}</span>
        </div>${vatDetailHtml}
      </div>
      <div class="grand">
        <span class="label">${escapeHtml(t.total)}</span>
        <span class="value">${formatNum(totalToPay)} ${escapeHtml(currency)}</span>
      </div>
      <div class="currency-note">${escapeHtml(t.amounts_in)} ${escapeHtml(currency)}</div>
    </div>
  </div>

  ${notesHtml}

</div><!-- /.invoice-content -->
<div class="invoice-footer">

  <!-- Vystavil -->
  <div class="issued-by">
    <span class="lbl">${escapeHtml(t.issued_by)}</span> ${escapeHtml(invoice.issued_by || "")}
    ${suppEmail ? `<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;${escapeHtml(suppEmail)}` : ""}
  </div>

  <!-- Upozorneni -->
  <div class="notice">
    ${escapeHtml(t.notice)}
  </div>

  <!-- DPH rekapitulace + QR -->
  <div class="recap-section">
    <div class="qr">
      ${qrSvg}
    </div>
    <table>
      <thead>
        <tr>
          <th colspan="4">${escapeHtml(t.vat_recap)}</th>
        </tr>
        <tr>
          <th>${escapeHtml(t.vat_base)}</th>
          <th>${escapeHtml(t.vat_rate)}</th>
          <th>${escapeHtml(t.vat_amount)}</th>
          <th>${escapeHtml(t.vat_with_total)}</th>
        </tr>
      </thead>
      <tbody>
        ${vatRecapHtml}
      </tbody>
      ${
        isForeign
          ? `<tfoot>
        <tr>
          <td colspan="4" style="font-size:0.7em; color:#666; padding-top:6px; text-align:left;">
            Přepočet kurzem ČNB ke dni ${formatDate(invoice.issue_date)}: 1 ${escapeHtml(currency)} = ${cnbRate.toFixed(3).replace(".", ",")} CZK
          </td>
        </tr>
      </tfoot>`
          : ""
      }
    </table>
  </div>

  <!-- Prevzal / razitko -->
  <div class="footer-row">
    <div class="col">${escapeHtml(t.received_by)}</div>
    <div class="col" style="text-align:right">${escapeHtml(t.stamp)}</div>
  </div>

</div><!-- /.invoice-footer -->
</div><!-- /.invoice-page -->

</body>
</html>`;

      // Save PDF to NAS
      if (nasFinancialsManager.isConfigured() && invoice.invoice_number) {
        const issueDate = invoice.issue_date
          ? new Date(invoice.issue_date)
          : new Date();
        const saveMode = query.save === "1";
        const pdfPromise = htmlToPdf(html)
          .then((pdfBuffer) => {
            nasFinancialsManager.saveIssuedInvoicePdf(
              invoice.invoice_number!,
              issueDate.getFullYear(),
              issueDate.getMonth() + 1,
              pdfBuffer,
            );
          })
          .catch((err) => {
            request.log.error(err, "Failed to save invoice PDF to NAS");
          });

        if (saveMode) {
          await pdfPromise;
          return reply.send({ success: true, message: "PDF uloženo" });
        }
      }

      return reply.type("text/html").send(html);
    },
  );
}