// Book every existing purchase order and cash-float slip against a supplier (idempotent).
// New suppliers from POs start with terms unset; ones from slips start as "cash".
// Usage: node scripts/backfill-suppliers.mjs
import PocketBase from "pocketbase";
import { readFileSync } from "node:fs";
import { supplierKey } from "../lib/supplier.ts";
for (const l of readFileSync(new URL("../.env.local", import.meta.url), "utf8").split("\n")) {
  const i = l.indexOf("="); if (i > 0 && !l.trim().startsWith("#")) process.env[l.slice(0, i).trim()] = l.slice(i + 1).trim();
}
const pb = new PocketBase(process.env.NEXT_PUBLIC_PB_URL);
pb.autoCancellation(false);
await pb.collection("_superusers").authWithPassword(process.env.PB_ADMIN, process.env.PB_PASS);

const list = await pb.collection("suppliers").getFullList();
const byKey = new Map(list.map((s) => [s.key, s]));
const byCode = new Map(list.filter((s) => s.code).map((s) => [s.code.toUpperCase(), s]));
async function ensure(name, code, terms, source) {
  const key = supplierKey(name);
  if (!key) return null;
  let s = (code && byCode.get(code.toUpperCase())) || byKey.get(key);
  if (!s) {
    s = await pb.collection("suppliers").create({ name: name.trim(), key, code: (code || "").toUpperCase(), terms, source });
    byKey.set(key, s); if (code) byCode.set(code.toUpperCase(), s);
    console.log(`  + ${name.trim()} (${source}${terms ? `, ${terms}` : ", terms not set"})`);
  }
  return s;
}
let linked = 0;
for (const p of await pb.collection("purchases").getFullList()) {
  if (p.supplier_ref) continue;
  const s = await ensure(p.supplier || "", p.supplier_code || "", "", "Purchase order");
  if (s) { await pb.collection("purchases").update(p.id, { supplier_ref: s.id }); linked++; }
}
for (const e of await pb.collection("cash_float_entries").getFullList({ filter: 'kind = "expense"' })) {
  if (e.supplier_ref || !e.supplier) continue;
  const s = await ensure(e.supplier, "", "cash", "Cash float");
  if (s) { await pb.collection("cash_float_entries").update(e.id, { supplier_ref: s.id }); linked++; }
}
console.log(`✓ ${linked} record(s) booked against a supplier; ${byKey.size} supplier(s) in the list`);