/**
 * One-time loader — YG-1 quote SOQ078608 → stock_purchase draft.
 *
 * Source PDF:  /Volumes/KIOXIA/Downloads/SOQ078608(CNL001)(YG-1 South Africa PTY LTD.)(2026-08-03).pdf
 * Supplier:    YG-1 (id `udpqcpsr9bfpfgx`)
 * Customer:    CNL001 (CNL Industrial Mining Supplies) — informational only;
 *              stock_purchases are NOT tied to a customer order.
 * Quote date:  2026-08-03
 * Items:       16 line items (T7317249, TC187246, …, E2545140)
 * Total:       R 10 651.11 incl (R 9 261.84 excl, R 1 389.27 VAT)
 *
 * ## Line items
 *
 * Parsed from the PDF by eyeballing the column layout. The "SET 2" /
 * "2SET" embed in the descriptions makes raw text extraction
 * ambiguous about quantity (the "2" is both a literal "2-tap set"
 * marker AND sometimes the quantity), so the quantities below were
 * verified against the math: `qty × unit × (1 − disc) × 1.15 == total_incl`.
 * The total also sums to the PDF's footer (R 9 261.84 excl).
 *
 * What this does:
 *   1. Validates each line's math against the PDF totals.
 *   2. Creates 16 new stock_items (none of these YG-1 SKUs exist yet —
 *      verified against the running PB before the script started).
 *   3. Creates one stock_purchase with status="draft",
 *      purchase_number = `PO{yy}{mm}{dd}{seq}STK` (today's first in the day).
 *   4. Creates 16 stock_purchase_items with cost_price = post-discount
 *      per-unit price (this is what we'll actually pay, ignoring the
 *      supplier's discount).
 *
 * Re-run safety: the script re-checks PB for an existing stock_item
 * with the same SKU before creating — if you re-run it after a partial
 * fail, the existing item rows are reused (idempotent on stock_items).
 * It does NOT dedupe against an existing draft; if you re-run after a
 * successful run you'll get a SECOND draft. Don't re-run after success.
 *
 * Run: `npx tsx scripts/2026-08-03-load-yg1-quote-soq078608.ts`
 */
import PocketBase from "pocketbase";

const PB_URL = "https://pocketbase-gnqc88suy8fqk6wyryjjdpvl.169.239.180.130.sslip.io";
const ADMIN_EMAIL = "david.els1@outlook.com";
const ADMIN_PASSWORD = "1234567890";

const YG1_SUPPLIER_ID = "udpqcpsr9bfpfgx";

/* ============================================================================
 * Parsed line items (verified by math, see header)
 * ========================================================================== */

interface ParsedLine {
  sku: string;
  description: string;
  quantity: number;
  unit_price_ex: number;
  disc_pct: number;
  pdf_total_incl: number;
  no_stock: boolean;
}

const LINES: ParsedLine[] = [
  { sku: "T7317249",  description: "HSS ISO529 HAND TAP SET 2 M4X0.7 6H 53.0L",          quantity: 2, unit_price_ex:  551.04, disc_pct: 60, pdf_total_incl:  506.95, no_stock: false },
  { sku: "TC187246",  description: "HSS-E ISO529 SPIRAL FLUTE TAP M4X0.7 6H 53.0L",     quantity: 2, unit_price_ex:  271.31, disc_pct: 60, pdf_total_incl:  249.61, no_stock: false },
  { sku: "T7317319",  description: "HSS ISO529 HAND TAP SET 2 M6X1.0 6H 66.0L",          quantity: 2, unit_price_ex:  455.12, disc_pct: 60, pdf_total_incl:  418.72, no_stock: false },
  { sku: "TC804316",  description: "HSS-E COMBO DIN371 SPIRAL FLUTE TAP M6X1.0 6H 80.0L", quantity: 2, unit_price_ex:  383.59, disc_pct: 60, pdf_total_incl:  352.90, no_stock: false },
  { sku: "TS2352902", description: "HSS ISO529 HAND TAP 2SET M8X1.0 6H 72.0L",            quantity: 2, unit_price_ex:  465.18, disc_pct: 60, pdf_total_incl:  427.96, no_stock: false },
  { sku: "T7317369",  description: "HSS ISO529 HAND TAP SET 2 M8X1.25 6H 72.0L",         quantity: 2, unit_price_ex:  692.74, disc_pct: 60, pdf_total_incl:  637.32, no_stock: false },
  { sku: "T7317429",  description: "HSS ISO529 HAND TAP SET 2 M10X1.5 6H 80.0L",         quantity: 1, unit_price_ex:  802.20, disc_pct: 60, pdf_total_incl:  369.01, no_stock: false },
  { sku: "TS2352932", description: "HSS ISO529 HAND TAP 2SET M10X1.25 6H 80.0L",          quantity: 1, unit_price_ex:  567.84, disc_pct: 60, pdf_total_incl:  261.21, no_stock: true  },
  { sku: "T7317509",  description: "HSS ISO529 HAND TAP SET 2 M12X1.75 6H 89.0L",        quantity: 1, unit_price_ex: 1152.19, disc_pct: 60, pdf_total_incl:  530.01, no_stock: false },
  { sku: "TC844556",  description: "HSS-E COMBO DIN374 SPIRAL FLUTE TAP M14X1.5 6H 100.0L", quantity: 1, unit_price_ex: 1100.35, disc_pct: 60, pdf_total_incl:  506.16, no_stock: false },
  { sku: "T7317709",  description: "HSS ISO529 HAND TAP SET 2 M20X2.5 6H 112.0L",        quantity: 2, unit_price_ex: 3104.01, disc_pct: 60, pdf_total_incl: 2855.69, no_stock: false },
  { sku: "TS1551712", description: "HSS ISO529 BSP PIPE HAND TAP 2SET G1/4-19 67.0L",     quantity: 2, unit_price_ex: 1061.43, disc_pct: 60, pdf_total_incl:  976.51, no_stock: false },
  { sku: "D1205200",  description: "HSS(M2) Jobber Taper Shank Drill Steam Homo DIN345 20XMT#2X140X238", quantity: 2, unit_price_ex: 1270.60, disc_pct: 70, pdf_total_incl: 876.71, no_stock: false },
  { sku: "E2545060",  description: "HSSCo8(M42) 4FL 30deg. Helix Short E/M 6X6X16X60.5",  quantity: 3, unit_price_ex:  265.21, disc_pct: 60, pdf_total_incl:  365.99, no_stock: false },
  { sku: "E2502080",  description: "HSSCo8(M42) 2FL 30deg. Helix Short E/M 8X10X11X61",  quantity: 4, unit_price_ex:  371.60, disc_pct: 60, pdf_total_incl:  683.74, no_stock: false },
  { sku: "E2545140",  description: "HSSCo8(M42) 4FL 30deg. Helix Short E/M 14X12X28.5X73", quantity: 2, unit_price_ex:  687.63, disc_pct: 60, pdf_total_incl:  632.62, no_stock: false },
];

const PDF_TOTALS = { excl: 9261.84, vat: 1389.27, incl: 10651.11 };

/* ============================================================================
 * Math validation
 * ========================================================================== */

function validateLines(lines: ParsedLine[]): void {
  let sumExcl = 0;
  let sumVat = 0;
  let sumIncl = 0;
  for (const l of lines) {
    const excl = l.quantity * l.unit_price_ex * (1 - l.disc_pct / 100);
    const vat = excl * 0.15;
    const incl = excl + vat;
    sumExcl += excl;
    sumVat += vat;
    sumIncl += incl;
    const expectedIncl = Math.round(l.quantity * l.unit_price_ex * (1 - l.disc_pct / 100) * 1.15 * 100) / 100;
    const diff = Math.abs(expectedIncl - l.pdf_total_incl);
    if (diff > 0.05) {
      throw new Error(
        `Line ${l.sku} math mismatch: expected total ${expectedIncl.toFixed(2)}, PDF says ${l.pdf_total_incl.toFixed(2)}, diff ${diff.toFixed(2)}`,
      );
    }
  }
  sumExcl = Math.round(sumExcl * 100) / 100;
  sumVat = Math.round(sumVat * 100) / 100;
  sumIncl = Math.round(sumIncl * 100) / 100;
  console.log(`  Sum excl: R ${sumExcl.toFixed(2)}  (PDF says ${PDF_TOTALS.excl.toFixed(2)})`);
  console.log(`  Sum vat:  R ${sumVat.toFixed(2)}  (PDF says ${PDF_TOTALS.vat.toFixed(2)})`);
  console.log(`  Sum incl: R ${sumIncl.toFixed(2)}  (PDF says ${PDF_TOTALS.incl.toFixed(2)})`);
  if (
    Math.abs(sumExcl - PDF_TOTALS.excl) > 0.05 ||
    Math.abs(sumVat - PDF_TOTALS.vat) > 0.05 ||
    Math.abs(sumIncl - PDF_TOTALS.incl) > 0.05
  ) {
    throw new Error("Footer totals do not match parsed lines");
  }
}

/* ============================================================================
 * PB utilities
 * ========================================================================== */

async function ensureStockItem(
  pb: PocketBase,
  sku: string,
  description: string,
  supplierId: string,
): Promise<{ id: string; created: boolean }> {
  const existing = await pb.collection("stock_items").getList(1, 1, {
    filter: `sku = "${sku}"`,
    fields: "id",
  });
  if (existing.items.length > 0) {
    return { id: String(existing.items[0].id), created: false };
  }
  const created = await pb.collection("stock_items").create({
    sku,
    name: description,
    description,
    unit: "SET",
    current_qty: 0,
    min_qty: 0,
    target_qty: 0,
    is_active: true,
    supplier: supplierId,
    location: "",
    notes: "",
  });
  return { id: String(created.id), created: true };
}

async function generateDraftNumber(pb: PocketBase): Promise<string> {
  const now = new Date();
  const yy = String(now.getFullYear()).slice(-2);
  const mm = String(now.getMonth() + 1).padStart(2, "0");
  const dd = String(now.getDate()).padStart(2, "0");
  const prefix = `PO${yy}${mm}${dd}`;
  const rows = await pb.collection("stock_purchases").getFullList({
    filter: `purchase_number ~ "${prefix}"`,
    fields: "purchase_number",
  });
  let max = 0;
  for (const r of rows) {
    const m = String(r.purchase_number ?? "").match(/^PO\d{6}(\d{2})STK$/);
    if (m) {
      const n = parseInt(m[1], 10);
      if (Number.isFinite(n) && n > max) max = n;
    }
  }
  const seq = String(max + 1).padStart(2, "0");
  return `${prefix}${seq}STK`;
}

/* ============================================================================
 * Main
 * ========================================================================== */

async function main() {
  console.log("=== 1. Validating math against PDF ===");
  validateLines(LINES);

  console.log(`\n=== 2. Connecting to PocketBase (${PB_URL}) ===`);
  const pb = new PocketBase(PB_URL);
  await pb.collection("_superusers").authWithPassword(ADMIN_EMAIL, ADMIN_PASSWORD);
  console.log("  Authenticated as admin");

  console.log("\n=== 3. Creating stock_items ===");
  const itemIds: string[] = [];
  for (const l of LINES) {
    const { id, created } = await ensureStockItem(pb, l.sku, l.description, YG1_SUPPLIER_ID);
    console.log(`  ${created ? "+" : "="} ${l.sku.padEnd(10)} → ${id} ${created ? "" : "(already existed)"}`);
    itemIds.push(id);
  }

  console.log("\n=== 4. Creating stock_purchase draft ===");
  const purchaseNumber = await generateDraftNumber(pb);
  console.log(`  purchase_number: ${purchaseNumber}`);
  const header = await pb.collection("stock_purchases").create({
    purchase_number: purchaseNumber,
    supplier: YG1_SUPPLIER_ID,
    status: "draft",
    notes: `Loaded from YG-1 quote SOQ078608 dated 2026-08-03 (customer CNL001). ${LINES.length} line items.`,
    email_error: "",
    email_message_id: "",
    email_payload: null,
  });
  const purchaseId = String(header.id);
  console.log(`  draft id: ${purchaseId}`);

  console.log("\n=== 5. Creating stock_purchase_items ===");
  for (let i = 0; i < LINES.length; i++) {
    const l = LINES[i];
    const costPrice = Math.round(l.unit_price_ex * (1 - l.disc_pct / 100) * 100) / 100;
    const line = await pb.collection("stock_purchase_items").create({
      purchase: purchaseId,
      stock_item: itemIds[i],
      description: l.description,
      quantity: l.quantity,
      quantity_received: 0,
      cost_price: costPrice,
      notes: l.no_stock ? "No stock (per YG-1 quote SOQ078608)" : "",
    });
    const flag = l.no_stock ? "  ← NO STOCK" : "";
    console.log(`  + ${l.sku.padEnd(10)}  qty=${String(l.quantity).padStart(2)}  cost=R ${costPrice.toFixed(2).padStart(8)}  line=${line.id}${flag}`);
  }

  console.log("\n=== Done ===");
  const totalCost = LINES.reduce((s, l) => s + l.quantity * l.unit_price_ex * (1 - l.disc_pct / 100), 0);
  console.log(`  Draft stock purchase: ${purchaseNumber}  (id ${purchaseId})`);
  console.log(`  Lines: ${LINES.length}`);
  console.log(`  Total cost (post-discount, excl VAT): R ${totalCost.toFixed(2)}`);
  console.log(`  Supplier: YG-1 (${YG1_SUPPLIER_ID})`);
}

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