/**
 * Smoke test — renders an invoice PDF for a synthetic order matching the
 * style of `data/rechnung.png` (1× Bluetooth Tracker @ 5,99 EUR × 6, B2B
 * customer "Schmidhofer Dienstleistungen" with UID ATU57680511) and writes
 * it to `data/sample-rechnung.pdf` for visual review.
 *
 * Also runs assertions on:
 *  - VAT calculations
 *  - GiroCode payload shape
 *  - IBAN validation
 *  - Numbering allocation in both modes
 *  - Notice derivation for B2B EU reverse-charge / export / Kleinunternehmer
 *
 * Run with:  npx tsx scripts/render-sample.ts
 */

import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
import { dirname, resolve } from "node:path";
import { fileURLToPath } from "node:url";
import { execFileSync } from "node:child_process";
import { tmpdir } from "node:os";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

import { composeInvoice } from "../app/services/invoice/composeInvoice";
import { buildGiroCodeDataUrl, buildGiroCodePayload } from "../app/services/invoice/girocode";
import {
  isValidAtVatId,
  isValidBic,
  isValidIban,
  normaliseIban,
} from "../app/services/invoice/validation";
import { renderInvoicePdf } from "../app/services/invoice/generateInvoice.server";
import type { RawOrderForInvoice } from "../app/services/invoice/loadOrderForInvoice.server";

// ------------------------------------------------------------------
// Lightweight assertion helper
// ------------------------------------------------------------------
let failed = 0;
function assert(name: string, cond: boolean, detail?: string) {
  if (cond) {
    console.log(`  ✓ ${name}`);
  } else {
    failed++;
    console.error(`  ✗ ${name}${detail ? ` — ${detail}` : ""}`);
  }
}
function assertEq<T>(name: string, actual: T, expected: T) {
  assert(name, actual === expected, `expected ${JSON.stringify(expected)}, got ${JSON.stringify(actual)}`);
}
function assertNear(name: string, actual: number, expected: number, eps = 0.01) {
  assert(name, Math.abs(actual - expected) <= eps, `expected ~${expected}, got ${actual}`);
}

/**
 * Extracts text from a PDF buffer using the system `pdftotext` (poppler).
 * The smoke script runs in a dev environment where poppler is available;
 * if it ever isn't, the assertion failures will surface a clear ENOENT.
 */
async function pdfToText(pdf: Buffer): Promise<string> {
  const inPath = resolve(tmpdir(), `linumiq-smoke-${Date.now()}-${Math.random().toString(36).slice(2)}.pdf`);
  writeFileSync(inPath, pdf);
  try {
    const out = execFileSync("pdftotext", ["-layout", "-enc", "UTF-8", inPath, "-"], { encoding: "utf8" });
    return out;
  } finally {
    try { require("node:fs").unlinkSync(inPath); } catch { /* best-effort cleanup */ }
  }
}

// ------------------------------------------------------------------
// Synthetic settings (mirrors the reference invoice)
// ------------------------------------------------------------------
const settings = {
  id: "test",
  shopDomain: "linumiq.myshopify.com",
  companyName: "LinumIQ",
  legalForm: "e.U.",
  ownerName: "Gerhard Berger",
  addressLine1: "Anton-Kleinoscheg-Straße 64c/4",
  addressLine2: "",
  postalCode: "8051",
  city: "Graz",
  countryCode: "AT",
  phone: "+43 660 1234567",
  email: "office@linumiq.com",
  website: "www.linumiq.com",
  vatId: "ATU12345678",
  taxNumber: "12 345/6789",
  registrationNo: "FN 123456a",
  registrationCourt: "Landesgericht Graz",
  bankName: "Raiffeisen Steiermark",
  iban: "AT611904300234573201",
  bic: "RZSTAT2G",
  giroCodeEnabled: true,
  numberingMode: "shopify_order_number",
  invoicePrefix: "RE-",
  invoiceSeed: 1000,
  defaultLanguage: "de",
  paymentTermDays: 14,
  footerNote: "Vielen Dank für Ihren Auftrag.",
  footerNoteEn: "Thank you for your business.",
  kleinunternehmer: false,
  logoUrl: "",
  smtpHost: "",
  smtpPort: 587,
  smtpSecure: false,
  smtpUser: "",
  smtpPassword: "",
  smtpFromName: "",
  smtpFromEmail: "",
  smtpReplyTo: "",
  createdAt: new Date(),
  updatedAt: new Date(),
} as const;

// ------------------------------------------------------------------
// Synthetic AT B2B order matching the reference image
// ------------------------------------------------------------------
function buildAtB2BOrder(): RawOrderForInvoice {
  // 6 × 5,99 EUR net = 35,94 EUR net; 20% VAT = 7,19 EUR; gross = 43,13 EUR
  const qty = 6;
  const unitNet = 5.99;
  const lineNet = qty * unitNet; // 35.94
  const lineTax = +(lineNet * 0.2).toFixed(2); // 7.19
  const lineGross = +(lineNet + lineTax).toFixed(2); // 43.13

  return {
    id: "gid://shopify/Order/9000000001",
    name: "#1004",
    orderNumber: 1004,
    createdAt: "2026-04-15T10:00:00Z",
    processedAt: "2026-04-15T10:00:00Z",
    currencyCode: "EUR",
    displayFinancialStatus: "PENDING",
    paymentGatewayNames: ["manual"],
    taxesIncluded: false,
    requiresShipping: true,
    discountCodes: [],
    customer: {
      firstName: "Lukas",
      lastName: "Schmidhofer",
      email: "lukas@schmidhofer.example",
      locale: "de-AT",
    },
    billingAddress: {
      name: "Lukas Schmidhofer",
      company: "Schmidhofer Dienstleistungen",
      address1: "Hauptstraße 12",
      address2: null,
      zip: "8010",
      city: "Graz",
      province: null,
      countryCode: "AT",
    },
    shippingAddress: {
      name: "Lukas Schmidhofer",
      company: "Schmidhofer Dienstleistungen",
      address1: "Lagerweg 4",
      address2: null,
      zip: "8020",
      city: "Graz",
      province: null,
      countryCode: "AT",
    },
    shippingLine: {
      title: "Standardversand",
      code: "STD",
      source: "shopify",
      carrierIdentifier: null,
      deliveryCategory: "shipping",
      originalPriceSet: { shopMoney: { amount: "5.00", currencyCode: "EUR" } },
      discountedPriceSet: { shopMoney: { amount: "5.00", currencyCode: "EUR" } },
      taxLines: [
        {
          title: "USt 20%",
          rate: 0.2,
          ratePercentage: 20,
          priceSet: { shopMoney: { amount: "1.00", currencyCode: "EUR" } },
        },
      ],
    },
    fulfillments: [
      {
        createdAt: "2026-05-13T10:30:00.000Z",
        trackingInfo: [
          { number: "JJD0099887766", url: "https://example.test/track/JJD0099887766", company: "DHL" },
        ],
      },
    ],
    lineItems: [
      {
        title: "Bluetooth Tracker",
        sku: "BT-TRK-001",
        quantity: qty,
        originalUnitPriceSet: { shopMoney: { amount: unitNet.toFixed(2), currencyCode: "EUR" } },
        discountedUnitPriceSet: null,
        imageUrl: "file://product-image", // placeholder; the smoke script inlines a real data: URL on the composed line below.
        taxLines: [
          {
            title: "USt 20%",
            rate: 0.2,
            ratePercentage: 20,
            priceSet: { shopMoney: { amount: lineTax.toFixed(2), currencyCode: "EUR" } },
          },
        ],
      },
    ],
    taxLines: [
      {
        title: "USt 20%",
        rate: 0.2,
        ratePercentage: 20,
        priceSet: { shopMoney: { amount: lineTax.toFixed(2), currencyCode: "EUR" } },
      },
    ],
    subtotalSet: { shopMoney: { amount: lineNet.toFixed(2), currencyCode: "EUR" } },
    totalTaxSet: { shopMoney: { amount: (lineTax + 1.0).toFixed(2), currencyCode: "EUR" } },
    totalPriceSet: { shopMoney: { amount: (lineGross + 6.0).toFixed(2), currencyCode: "EUR" } },
    purchasingEntity: {
      company: {
        name: "Schmidhofer Dienstleistungen",
        vatId: "ATU57680511",
        address: null,
      },
    },
  };
}

// ------------------------------------------------------------------
// Variants for VAT-scenario assertions
// ------------------------------------------------------------------
function buildEuB2BReverseChargeOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.billingAddress!.countryCode = "DE";
  o.billingAddress!.company = "Müller GmbH";
  o.billingAddress!.zip = "80331";
  o.billingAddress!.city = "München";
  o.purchasingEntity!.company!.vatId = "DE123456789";
  o.lineItems[0].taxLines = [];
  o.taxLines = [];
  // No VAT for reverse-charge; clear shipping VAT too.
  o.shippingLine = null;
  o.fulfillments = [];
  o.shippingAddress = null;
  o.totalTaxSet = { shopMoney: { amount: "0.00", currencyCode: "EUR" } };
  o.totalPriceSet = { shopMoney: { amount: "35.94", currencyCode: "EUR" } };
  return o;
}
function buildExportOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.purchasingEntity = null;
  o.billingAddress!.countryCode = "US";
  o.billingAddress!.company = "";
  o.billingAddress!.name = "Jane Doe";
  o.billingAddress!.zip = "10001";
  o.billingAddress!.city = "New York";
  o.lineItems[0].taxLines = [];
  o.taxLines = [];
  o.shippingLine = null;
  o.fulfillments = [];
  o.shippingAddress = null;
  o.totalTaxSet = { shopMoney: { amount: "0.00", currencyCode: "EUR" } };
  o.totalPriceSet = { shopMoney: { amount: "35.94", currencyCode: "EUR" } };
  o.customer!.locale = "en";
  return o;
}

/**
 * Variant of the AT B2B order with a per-line discount: unit price stays
 * 7.19 EUR gross (5.99 net) but Shopify allocated a 1.00 EUR/unit discount,
 * so the discounted unit price is 6.19 gross (5.16 net). Also adds an
 * order-level discount code ("SUMMER10") for the meta-block render.
 */
function buildDiscountedOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.discountCodes = ["SUMMER10"];
  // Discount of 1.00 EUR/unit applied: net unit drops from 5.99 to 4.99,
  // qty 6 → 29.94 net, tax (20%) = 5.99.
  o.lineItems[0].discountedUnitPriceSet = {
    shopMoney: { amount: "4.99", currencyCode: "EUR" },
  };
  o.lineItems[0].taxLines = [
    {
      title: "USt 20%",
      rate: 0.2,
      ratePercentage: 20,
      priceSet: { shopMoney: { amount: "5.99", currencyCode: "EUR" } },
    },
  ];
  return o;
}

/**
 * Variant of the AT B2B order whose shipping line is local pickup. The
 * "shipping address" still carries the pickup-location address (as Shopify
 * does), but the composer should detect the pickup and suppress it.
 */
function buildPickupOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.shippingLine = {
    title: "Lager Graz",
    code: "Pickup",
    source: "shopify",
    carrierIdentifier: null,
    deliveryCategory: "pickup",
    originalPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    discountedPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    taxLines: [],
  };
  return o;
}

/** Pickup variant where neither title/code nor source mention "pickup" —
 *  detection must rely purely on `deliveryCategory`. Mirrors what we
 *  observed on a real Shopify Local Pickup install. */
function buildCategoryOnlyPickupOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.shippingLine = {
    title: "Lager Graz",
    code: "Standard",
    source: "shopify",
    carrierIdentifier: null,
    deliveryCategory: "pickup",
    originalPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    discountedPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    taxLines: [],
  };
  return o;
}

/** Pickup variant matching a REAL observed order on
 *  linumiq-dev.myshopify.com (#1032): Shopify's built-in "Shop location"
 *  rate. NO "pickup" string anywhere, deliveryCategory is `null`, and
 *  shippingAddress is also `null` — detection must rely on
 *  `requiresShipping && shippingAddress == null`. */
function buildShopLocationPickupOrder(): RawOrderForInvoice {
  const o = buildAtB2BOrder();
  o.shippingLine = {
    title: "Shop location",
    code: "Shop location",
    source: "shopify",
    carrierIdentifier: null,
    deliveryCategory: null,
    originalPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    discountedPriceSet: { shopMoney: { amount: "0.00", currencyCode: "EUR" } },
    taxLines: [],
  };
  o.shippingAddress = null;
  o.requiresShipping = true;
  return o;
}

// ------------------------------------------------------------------
// Run assertions
// ------------------------------------------------------------------
async function main() {
  console.log("• Validation helpers");
  assert("isValidIban accepts a known-good AT IBAN", isValidIban("AT611904300234573201"));
  assert("isValidIban rejects garbage", !isValidIban("AT00 0000 0000 0000 0001"));
  assert("normaliseIban strips spaces and uppercases", normaliseIban("at61 1904 3002 3457 3201") === "AT611904300234573201");
  assert("isValidBic accepts 8-char", isValidBic("RZSTAT2G"));
  assert("isValidBic accepts 11-char", isValidBic("RZSTAT2G123"));
  assert("isValidBic rejects too-short", !isValidBic("RZ"));
  assert("isValidAtVatId accepts ATU + 8 digits", isValidAtVatId("ATU12345678"));
  assert("isValidAtVatId rejects non-AT", !isValidAtVatId("DE123456789"));

  console.log("• GiroCode payload");
  const payload = buildGiroCodePayload({
    beneficiaryName: settings.companyName,
    iban: settings.iban,
    bic: settings.bic,
    amount: 43.13,
    remittance: "RE-1004",
  });
  const lines = payload.split("\n");
  assertEq("BCD service tag", lines[0], "BCD");
  assertEq("version 002", lines[1], "002");
  assertEq("charset UTF-8", lines[2], "1");
  assertEq("SCT", lines[3], "SCT");
  assertEq("BIC", lines[4], "RZSTAT2G");
  assertEq("Beneficiary name", lines[5], "LinumIQ");
  assertEq("IBAN", lines[6], "AT611904300234573201");
  assertEq("Amount", lines[7], "EUR43.13");
  assertEq("Remittance", lines[10], "RE-1004");
  assert("Payload is < 331 bytes per EPC069-12", Buffer.byteLength(payload, "utf8") < 331,
    `actual ${Buffer.byteLength(payload, "utf8")}`);

  console.log("• AT B2B compose (matches reference invoice)");
  const order = buildAtB2BOrder();
  const vm = composeInvoice({ order, settings: settings as never, invoiceNumber: "RE-1004" });
  assertEq("language picked from de-AT", vm.language, "de");
  assertEq("currency", vm.currency, "EUR");
  assert("isB2B detected", vm.isB2B);
  assertEq("recipientVatId", vm.recipientVatId, "ATU57680511");
  assertEq("line count (1 product + 1 shipping)", vm.lines.length, 2);
  const ln = vm.lines[0];
  assertEq("line title", ln.title, "Bluetooth Tracker");
  assertEq("line qty", ln.quantity, 6);
  assertNear("line unit net", ln.unitPriceNet, 5.99);
  assertNear("line total net", ln.totalNet, 35.94);
  const shipLine = vm.lines[1];
  assert("shipping line title prefixed", shipLine.title.startsWith("Versand"),
    `got "${shipLine.title}"`);
  assertNear("shipping line net", shipLine.totalNet, 5.0);
  assertNear("net total (incl. shipping)", vm.totals.net, 40.94);
  assertEq("vat breakdown rows", vm.totals.vatBreakdown.length, 1);
  assertNear("vat amount (incl. shipping VAT)", vm.totals.vatBreakdown[0].tax, 8.19);
  assertEq("vat rate %", vm.totals.vatBreakdown[0].ratePct, 20);
  assertNear("gross (incl. shipping)", vm.totals.gross, 49.13);
  assertEq("no notices for AT B2B with VAT charged", vm.notices.length, 0);
  assert("due date 14 days after invoice date", !!vm.dueDate
    && Math.round((vm.dueDate.getTime() - vm.invoiceDate.getTime()) / 86400000) === 14);
  assertEq("paymentGatewayNames propagated", vm.paymentGatewayNames.join(","), "manual");
  assertEq("paymentStatus derived from displayFinancialStatus=PENDING", vm.paymentStatus, "unpaid");
  assertEq("orderName propagated", vm.orderName, "#1004");
  assertEq("shippingMethod propagated", vm.shippingMethod, "Standardversand");
  assertEq("tracking entries", vm.tracking.length, 1);
  assertEq("tracking number", vm.tracking[0].number, "JJD0099887766");
  assertEq("tracking carrier", vm.tracking[0].company, "DHL");
  assert("separateShippingAddress detected (differs from billing)",
    vm.separateShippingAddress?.addressLine1 === "Lagerweg 4");

  console.log("• EU B2B reverse-charge notice");
  const euOrder = buildEuB2BReverseChargeOrder();
  const euVm = composeInvoice({ order: euOrder, settings: settings as never, invoiceNumber: "RE-1005" });
  assert("isB2B", euVm.isB2B);
  assertEq("zero VAT", euVm.totals.totalVat, 0);
  assertEq("reverseCharge notice present", euVm.notices.find((n) => n.kind === "reverseCharge")?.kind, "reverseCharge");

  console.log("• Third-country export notice");
  const exportOrder = buildExportOrder();
  const exVm = composeInvoice({ order: exportOrder, settings: settings as never, invoiceNumber: "RE-1006" });
  assertEq("zero VAT", exVm.totals.totalVat, 0);
  assertEq("language fallback to en", exVm.language, "en");
  assertEq("export notice present", exVm.notices.find((n) => n.kind === "export")?.kind, "export");

  console.log("• Kleinunternehmer notice");
  const k = composeInvoice({
    order: buildAtB2BOrder(),
    settings: { ...(settings as object), kleinunternehmer: true } as never,
    invoiceNumber: "RE-1007",
  });
  assertEq("kleinunternehmer notice present", k.notices.find((n) => n.kind === "kleinunternehmer")?.kind, "kleinunternehmer");

  console.log("• Render PDF for AT B2B order");
  // Attach logo (loaded from disk so the smoke output mirrors a real merchant setup).
  const logoPath = resolve(__dirname, "..", "data", "linumiq-logo.png");
  const logoBytes = readFileSync(logoPath);
  const logoDataUrl = `data:image/png;base64,${logoBytes.toString("base64")}`;
  vm.issuer.logoDataUrl = logoDataUrl;
  // Stand in for a real product image (the orchestrator fetches it from
  // Shopify CDN; here we re-use the logo bytes so the table cell exercises
  // the icon rendering path).
  assertEq("composer propagates imageUrl", vm.lines[0].imageUrl, "file://product-image");
  vm.lines[0].imageDataUrl = logoDataUrl;
  // Attach GiroCode (rendered manually here since the orchestrator does it).
  vm.giroCodePngDataUrl = await buildGiroCodeDataUrl({
    beneficiaryName: settings.companyName,
    iban: settings.iban,
    bic: settings.bic,
    amount: vm.totals.gross,
    remittance: vm.number,
  });

  const buffer = await renderInvoicePdf(vm);
  const out = resolve(__dirname, "..", "data", "sample-rechnung.pdf");
  mkdirSync(dirname(out), { recursive: true });
  writeFileSync(out, buffer);
  const start = buffer.subarray(0, 5).toString("ascii");
  assertEq("PDF magic header %PDF-", start, "%PDF-");
  assert("PDF size > 5 KB", buffer.length > 5_000, `actual ${buffer.length}`);
  console.log(`  → wrote ${out} (${buffer.length} bytes)`);

  // ----------------------------------------------------------------
  // Storno (cancellation invoice) composition + render
  // ----------------------------------------------------------------
  console.log("• Storno composition (cancels RE-1004)");
  const storno = composeInvoice({
    order,
    settings: settings as never,
    invoiceNumber: "RE-1004-S",
    storno: { cancelsNumber: "RE-1004" },
  });
  assertEq("kind = storno", storno.kind, "storno");
  assertEq("cancelsNumber populated", storno.cancelsNumber, "RE-1004");
  assert("dueDate suppressed for storno", storno.dueDate == null);
  assertEq("line count preserved", storno.lines.length, 2);
  assertNear("line qty preserved (only money negated)", storno.lines[0].quantity, 6);
  assertNear("line unit price negated", storno.lines[0].unitPriceNet, -5.99);
  assertNear("line totalNet negated", storno.lines[0].totalNet, -35.94);
  assertNear("shipping line totalNet negated", storno.lines[1].totalNet, -5.0);
  assertNear("totals.net negated", storno.totals.net, -40.94);
  assertNear("totals.totalVat negated", storno.totals.totalVat, -8.19);
  assertNear("totals.gross negated", storno.totals.gross, -49.13);
  assertEq("vat breakdown row count preserved", storno.totals.vatBreakdown.length, 1);
  assertNear("vat breakdown tax negated", storno.totals.vatBreakdown[0].tax, -8.19);

  console.log("• Render storno PDF");
  storno.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  // Storno deliberately omits GiroCode (negative amount).
  const stornoBuf = await renderInvoicePdf(storno);
  const stornoOut = resolve(__dirname, "..", "data", "sample-storno.pdf");
  writeFileSync(stornoOut, stornoBuf);
  assertEq("storno PDF magic", stornoBuf.subarray(0, 5).toString("ascii"), "%PDF-");
  assert("storno PDF > 5 KB", stornoBuf.length > 5_000, `actual ${stornoBuf.length}`);
  console.log(`  → wrote ${stornoOut} (${stornoBuf.length} bytes)`);

  // ----------------------------------------------------------------
  // Footer note translation
  // ----------------------------------------------------------------
  console.log("• Footer note (per-language)");
  const deVm = composeInvoice({ order, settings: settings as never, invoiceNumber: "RE-1010" });
  assertEq("DE footerNote propagated", deVm.issuer.footerNote, "Vielen Dank für Ihren Auftrag.");
  assertEq("EN footerNote propagated", deVm.issuer.footerNoteEn, "Thank you for your business.");
  const enVm = composeInvoice({ order, settings: settings as never, invoiceNumber: "RE-1011", forceLanguage: "en" });
  assertEq("forceLanguage=en", enVm.language, "en");

  // Render both and verify the rendered text differs by language.
  const dePdf = await renderInvoicePdf(deVm);
  const enPdf = await renderInvoicePdf(enVm);
  const deText = await pdfToText(dePdf);
  const enText = await pdfToText(enPdf);
  assert("DE PDF contains German footer", deText.includes("Vielen Dank für Ihren Auftrag."), `text snippet: ${deText.slice(0, 200)}…`);
  assert("DE PDF does NOT contain English footer", !deText.includes("Thank you for your business."));
  assert("EN PDF contains English footer", enText.includes("Thank you for your business."), `text snippet: ${enText.slice(0, 200)}…`);
  assert("EN PDF does NOT contain German footer", !enText.includes("Vielen Dank für Ihren Auftrag."));

  // Closing line: generic thank-you, no owner-name signature directly under it.
  // (The legal "Inhaber: <name>" block in the page footer is unrelated and stays.)
  assert("DE PDF closing reads 'Danke für deinen Einkauf'", deText.includes("Danke für deinen Einkauf"));
  assert("DE PDF no longer contains 'Mit freundlichen Grüßen'", !deText.includes("Mit freundlichen Grüßen"));
  assert(
    "DE PDF: owner name is NOT a signature under the closing",
    !/Danke für deinen Einkauf[\s\S]{0,40}Gerhard Berger/.test(deText),
  );
  assert("EN PDF closing reads 'Thank you for your purchase.'", enText.includes("Thank you for your purchase."));
  assert("EN PDF no longer contains 'Kind regards'", !enText.includes("Kind regards"));
  assert(
    "EN PDF: owner name is NOT a signature under the closing",
    !/Thank you for your purchase\.[\s\S]{0,40}Gerhard Berger/.test(enText),
  );

  // Informal German tone (du/dein) — make sure no formal "Sie/Ihren" remains
  // in the strings we control (footer / signature lines come from settings).
  assert("DE PDF uses informal salutation 'Hallo,'", deText.includes("Hallo,"));
  assert("DE PDF no longer uses 'Sehr geehrte Damen und Herren'", !deText.includes("Sehr geehrte Damen und Herren"));
  assert("DE PDF uses informal 'deine Bestellung'", deText.includes("deine Bestellung"));
  assert(
    "DE PDF payment-terms uses informal 'überweise … für dich'",
    deText.includes("Bitte überweise") && deText.includes("für dich"),
  );
  assert("DE PDF shows payment status row", deText.includes("Zahlstatus"));
  assert("DE PDF shows payment status value 'Offen' for PENDING", deText.includes("Offen"));
  assert("DE PDF shows payment method row", deText.includes("Zahlart"));
  // The Shopify Admin GraphQL API returns the *English* template name for
  // built-in manual payment gateways even on German-locale shops — we
  // localize it ourselves via i18n.paymentGatewayLabels so the PDF matches
  // what the customer saw on the order-confirmation page.
  assert("DE PDF localizes 'manual' gateway to 'Manuelle Zahlung'",
    deText.includes("Manuelle Zahlung"));
  assert("DE PDF no longer shows raw English 'Manual' as gateway label",
    !/Zahlart[\s\S]{0,20}Manual\b/.test(deText));
  assert("EN PDF shows payment status row", enText.includes("Payment status"));
  assert("EN PDF shows payment status value 'Outstanding' for PENDING", enText.includes("Outstanding"));

  // Shipment + order-number block.
  assert("DE PDF shows order number row 'Bestellnummer'", deText.includes("Bestellnummer"));
  assert("DE PDF shows Shopify order name '#1004'", deText.includes("#1004"));
  assert("DE PDF shows shipping method row 'Versandart'", deText.includes("Versandart"));
  assert("DE PDF shows shipping method value 'Standardversand'", deText.includes("Standardversand"));
  assert("DE PDF shows tracking row 'Sendungsnummer'", deText.includes("Sendungsnummer"));
  assert("DE PDF shows tracking number", deText.includes("JJD0099887766"));
  assert("DE PDF shows shipping line item with prefix", deText.includes("Versand"));
  assert("DE PDF shows separate delivery address heading", deText.includes("Lieferadresse"));
  assert("DE PDF shows shipping address line", deText.includes("Lagerweg 4"));
  assert("EN PDF shows order number row 'Order no.'", enText.includes("Order no."));
  assert("EN PDF shows shipping method row 'Shipping method'", enText.includes("Shipping method"));
  assert("EN PDF shows tracking row 'Tracking no.'", enText.includes("Tracking no."));
  assert("EN PDF shows separate delivery address heading", enText.includes("Shipping address"));

  // Order-number suppression: when the invoice number's trailing digits
  // match the Shopify order name (default numbering mode), the redundant
  // "· Bestellnummer: #1004" suffix should be dropped from the title.
  const sameNumVm = composeInvoice({
    order, settings: settings as never, invoiceNumber: "RE-1004",
  });
  sameNumVm.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  const sameNumText = await pdfToText(await renderInvoicePdf(sameNumVm));
  assert("PDF suppresses 'Bestellnummer' suffix when invoice# matches order#",
    !sameNumText.includes("Bestellnummer"));
  assert("PDF still shows the invoice number itself when suppressed",
    sameNumText.includes("RE-1004"));

  // ----------------------------------------------------------------
  // Delivery date follows latest fulfillment, not processedAt
  // ----------------------------------------------------------------
  console.log("• Delivery date is taken from latest fulfillment");
  // The AT B2B fixture has processedAt 2026-04-15 and fulfillment.createdAt
  // 2026-05-13 — the composer must pick the fulfillment.
  assertEq(
    "vm.deliveryDate matches fulfillment.createdAt",
    vm.deliveryDate.toISOString().slice(0, 10),
    "2026-05-13",
  );
  // EU/Export variants have no fulfillments, so delivery date == invoice date.
  assertEq(
    "EU vm.deliveryDate falls back to invoiceDate when unfulfilled",
    euVm.deliveryDate.toISOString().slice(0, 10),
    euVm.invoiceDate.toISOString().slice(0, 10),
  );

  // ----------------------------------------------------------------
  // Discount: per-line strikethrough + cart code
  // ----------------------------------------------------------------
  console.log("• Discount (per-line + cart-level)");
  const discOrder = buildDiscountedOrder();
  const discVm = composeInvoice({
    order: discOrder,
    settings: settings as never,
    invoiceNumber: "RE-1020",
  });
  assertEq("discountCodes propagated", discVm.discountCodes.join(","), "SUMMER10");
  assertNear("discounted unit net (~4.99)", discVm.lines[0].unitPriceNet, 4.99);
  assert(
    "originalUnitPriceNet populated when discounted differs",
    discVm.lines[0].originalUnitPriceNet != null,
  );
  assertNear(
    "originalUnitPriceNet matches pre-discount net (~5.99)",
    discVm.lines[0].originalUnitPriceNet ?? 0,
    5.99,
  );
  discVm.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  const discPdf = await renderInvoicePdf(discVm);
  const discText = await pdfToText(discPdf);
  assert("DE PDF shows discount-code label", discText.includes("Rabattcode"));
  assert("DE PDF shows discount code value", discText.includes("SUMMER10"));
  const discEnVm = composeInvoice({
    order: discOrder,
    settings: settings as never,
    invoiceNumber: "RE-1021",
    forceLanguage: "en",
  });
  discEnVm.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  const discEnText = await pdfToText(await renderInvoicePdf(discEnVm));
  assert("EN PDF shows discount-code label", discEnText.includes("Discount code"));

  // ----------------------------------------------------------------
  // Pickup: separate shipping address suppressed; method localized
  // ----------------------------------------------------------------
  console.log("• Local pickup");
  const pickupOrder = buildPickupOrder();
  const pickupVm = composeInvoice({
    order: pickupOrder,
    settings: settings as never,
    invoiceNumber: "RE-1030",
  });
  assert("isPickup detected via shippingLine heuristic", pickupVm.isPickup);
  assertEq("pickupLocationName propagated from shippingLine.title", pickupVm.pickupLocationName, "Lager Graz");
  assert("shippingMethod cleared for pickup (renderer uses pickup row instead)",
    pickupVm.shippingMethod == null);
  assert(
    "separateShippingAddress suppressed for pickup",
    pickupVm.separateShippingAddress == null,
  );
  pickupVm.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  const pickupText = await pdfToText(await renderInvoicePdf(pickupVm));
  assert("DE pickup PDF shows 'Abholort' label", pickupText.includes("Abholort"));
  assert("DE pickup PDF shows location name", pickupText.includes("Lager Graz"));
  assert("DE pickup PDF does NOT show 'Versandart'", !pickupText.includes("Versandart"));
  assert(
    "DE pickup PDF does NOT render pickup-location address as delivery address",
    !pickupText.includes("Lieferadresse"),
  );

  // EN translation
  const pickupEnVm = composeInvoice({
    order: pickupOrder,
    settings: settings as never,
    invoiceNumber: "RE-1031",
    forceLanguage: "en",
  });
  pickupEnVm.issuer.logoDataUrl = vm.issuer.logoDataUrl;
  const pickupEnText = await pdfToText(await renderInvoicePdf(pickupEnVm));
  assert("EN pickup PDF shows 'Pick-up location' label", pickupEnText.includes("Pick-up location"));

  // Real-world pickup variant: shippingLine has no "pickup" keyword in
  // title/code/source — only `deliveryCategory` says it's pickup.
  const categoryPickupVm = composeInvoice({
    order: buildCategoryOnlyPickupOrder(),
    settings: settings as never,
    invoiceNumber: "RE-1033",
  });
  assert("isPickup detected from deliveryCategory alone", categoryPickupVm.isPickup);
  assertEq("pickupLocationName from title when category-only",
    categoryPickupVm.pickupLocationName, "Lager Graz");
  assert("shippingMethod cleared in category-only pickup",
    categoryPickupVm.shippingMethod == null);

  // Real-world "Shop location" pickup (matches dev order #1032): no
  // "pickup" keyword anywhere, deliveryCategory null, shippingAddress null.
  // The only signal is `requiresShipping && !shippingAddress`.
  const shopLocPickupVm = composeInvoice({
    order: buildShopLocationPickupOrder(),
    settings: settings as never,
    invoiceNumber: "RE-1034",
  });
  assert("isPickup detected from missing shippingAddress (Shop location rate)",
    shopLocPickupVm.isPickup);
  assertEq("pickupLocationName from shippingLine.title for Shop location",
    shopLocPickupVm.pickupLocationName, "Shop location");
  assert("shippingMethod cleared for Shop location pickup",
    shopLocPickupVm.shippingMethod == null);

  // Fallback: when footerNoteEn is empty, English uses the German note.
  console.log("• Footer note fallback (en → de when EN empty)");
  const settingsNoEn = { ...(settings as object), footerNoteEn: "" } as never;
  const fbVm = composeInvoice({ order, settings: settingsNoEn, invoiceNumber: "RE-1012", forceLanguage: "en" });
  const fbPdf = await renderInvoicePdf(fbVm);
  const fbText = await pdfToText(fbPdf);
  assert("EN PDF falls back to DE footer when EN empty", fbText.includes("Vielen Dank für Ihren Auftrag."));

  // Empty German footer + empty English footer renders nothing (no crash).
  console.log("• Footer note empty (no crash, nothing rendered)");
  const settingsBlank = { ...(settings as object), footerNote: "", footerNoteEn: "" } as never;
  const blankVm = composeInvoice({ order, settings: settingsBlank, invoiceNumber: "RE-1013" });
  const blankPdf = await renderInvoicePdf(blankVm);
  const blankText = await pdfToText(blankPdf);
  assert("blank-footer DE PDF produced", blankPdf.length > 4_000);
  assert("blank-footer DE PDF has no German footer text", !blankText.includes("Vielen Dank für Ihren Auftrag."));

  if (failed > 0) {
    console.error(`\n${failed} assertion(s) FAILED`);
    process.exit(1);
  }
  console.log("\nAll smoke checks passed.");
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});