WFDASH-WEBAPP/src/lib/pdf/purchase-order-document.test.tsx

import { describe, it, expect } from "vitest";
import { renderPurchaseOrderPdf } from "./render";
import type { Letterhead } from "@/lib/letterhead";
import type { Order, OrderItem, PurchaseOrder, Supplier } from "@/lib/types";

/**
 * Smoke tests for the supplier-facing PO PDF renderer. We don't
 * render visually — we assert the binary is a well-formed PDF
 * (magic bytes, sane size) so any regression in the render pipeline
 * (style typo breaking JSX, dep misconfig, etc.) trips the test
 * even without eyeballing output.
 *
 * The VAT-line correctness is covered by `format.test.ts`
 * (poSubtotal + vatAmount helpers) and by inspection during code
 * review — this file guards the integration.
 */

const baseLetterhead: Letterhead = {
  id: "lh1",
  collectionId: "pbc_letterhead",
  collectionName: "letterhead_settings",
  created: "2026-08-06T00:00:00.000Z",
  updated: "2026-08-06T00:00:00.000Z",
  display_name: "CNL Mining Supplies",
  address: "47 Station Street\nCarletonville, Gauteng 2499",
  phone: "+27 18 786 2897",
  email: "quotes@wfsales.co.za",
  vat_number: "4840229449",
  vat_percent: 15,
  registration_number: "2014/004024/07",
  bank_name: "Standard Bank - Carletonville",
  bank_account_number: "Current Account\n022196552",
  bank_branch_code: "016141",
  terms: "Terms and Conditions:\n1. Standard terms apply.",
  default_markup_percent: 30,
  footer_text: "",
  logo: "",
  is_active: true,
  company: "CNL Mining Supplies (Pty) Ltd",
  accent_color: "#738224",
};

const baseSupplier: Supplier = {
  id: "sup1",
  collectionId: "pbc_suppliers",
  collectionName: "suppliers",
  created: "2026-08-06T00:00:00.000Z",
  updated: "2026-08-06T00:00:00.000Z",
  suppliername: "Alpha Bearings (Pty) Ltd",
  suppliernumber: "+27 11 555 0123",
  supplieraddress: "12 Industrial Rd\nJohannesburg, Gauteng 2000",
  email: "orders@alphabearings.co.za",
  supply_tags: "",
  coordinates: "",
  closingtime: "",
};

const baseOrder: Order = {
  id: "ord1",
  collectionId: "pbc_orders",
  collectionName: "orders",
  created: "2026-08-06T00:00:00.000Z",
  updated: "2026-08-06T00:00:00.000Z",
  order_number: "SO-260001",
  customer: "cust1",
  company: "comp1",
  quote: "",
  notes: "",
  quote_matching_attempted: false,
  quote_match_confidence: 0,
  potential_quote: "",
  potential_quote_confidence: 0,
  is_repair_order: false,
  rep: "",
  invoiced: false,
  quote_reference_text: "",
  quote_match_method: "",
  contact_name: "",
  email_subject: "",
  email_sender: "",
};

const basePurchaseOrder: PurchaseOrder = {
  id: "po1",
  collectionId: "pbc_purchase_orders",
  collectionName: "purchase_orders",
  created: "2026-08-06T00:00:00.000Z",
  updated: "2026-08-06T00:00:00.000Z",
  po_number: "PO26000001",
  order: "ord1",
  supplier: "sup1",
  status: "draft",
  total_amount: 300,
  documents: [],
  documents_history: [],
  email_message_id: "",
  email_payload: { subject: "", body: "" },
  email_error: "",
};

const baseItems: OrderItem[] = [
  {
    id: "oi1",
    collectionId: "pbc_order_items",
    collectionName: "order_items",
    created: "2026-08-06T00:00:00.000Z",
    updated: "2026-08-06T00:00:00.000Z",
    order: "ord1",
    description: "Wheel hub kit — 6-bolt pattern",
    po_description: "Wheel hub kit — 6-bolt pattern",
    quantity: 3,
    order_qty: 3,
    selling_price: 150,
    supplier: "sup1",
    cost_price: 100,
    markup: 50,
    purchase_order: "po1",
    item_status: "processed",
    in_stock: false,
    notes: "",
    sku: "WH-6B-001",
    delivery_note_number: "",
    problem_notes: "",
  } as OrderItem,
];

describe("renderPurchaseOrderPdf", () => {
  it("produces a Buffer with a PDF magic-number header", async () => {
    const buf = await renderPurchaseOrderPdf({
      purchaseOrder: basePurchaseOrder,
      items: baseItems,
      order: baseOrder,
      supplier: baseSupplier,
      letterhead: baseLetterhead,
      logoDataUri: null,
      generatedAtIso: "2026-08-06T12:00:00.000Z",
      totalAmount: 300,
    });
    expect(Buffer.isBuffer(buf)).toBe(true);
    expect(buf.subarray(0, 5).toString("ascii")).toBe("%PDF-");
  }, 30_000);

  it("produces a non-trivial buffer (> 1 KB) for a simple PO", async () => {
    const buf = await renderPurchaseOrderPdf({
      purchaseOrder: basePurchaseOrder,
      items: baseItems,
      order: baseOrder,
      supplier: baseSupplier,
      letterhead: baseLetterhead,
      logoDataUri: null,
      generatedAtIso: "2026-08-06T12:00:00.000Z",
      totalAmount: 300,
    });
    expect(buf.length).toBeGreaterThan(1024);
  }, 30_000);

  it("handles missing logo gracefully (logoDataUri=null)", async () => {
    const buf = await renderPurchaseOrderPdf({
      purchaseOrder: basePurchaseOrder,
      items: baseItems,
      order: baseOrder,
      supplier: baseSupplier,
      letterhead: { ...baseLetterhead, logo: "" },
      logoDataUri: null,
      generatedAtIso: "2026-08-06T12:00:00.000Z",
      totalAmount: 300,
    });
    expect(buf.subarray(0, 5).toString("ascii")).toBe("%PDF-");
  }, 30_000);

  it("renders with the ISHERWOOD letterhead code (different accent color)", async () => {
    const buf = await renderPurchaseOrderPdf({
      purchaseOrder: basePurchaseOrder,
      items: baseItems,
      order: baseOrder,
      supplier: baseSupplier,
      letterhead: {
        ...baseLetterhead,
        display_name: "ISHERWOOD MINING SUPPLIES",
        accent_color: "#7ed957",
      },
      logoDataUri: null,
      generatedAtIso: "2026-08-06T12:00:00.000Z",
      totalAmount: 300,
    });
    expect(buf.subarray(0, 5).toString("ascii")).toBe("%PDF-");
  }, 30_000);
});