/**
 * One-off ingest: write the 142 NSS spring pin ISO8752 items
 * (Spring Steel CS70) from `scripts/nss-spring-pins-iso8752-pb-import.json`
 * into the PocketBase `stock_items` collection.
 *
 * Same safety rails as the other ingest scripts (idempotent,
 * applyDefaultMarkupToPatch, per-row try/catch).
 *
 * Run:
 *   npx tsx scripts/nss-spring-pins-iso8752-ingest.ts --dry-run --limit 5
 *   npx tsx scripts/nss-spring-pins-iso8752-ingest.ts --limit 5
 *   npx tsx scripts/nss-spring-pins-iso8752-ingest.ts
 */

import "./_env";

import { getAdminPocketBase } from "../src/lib/server/pocketbase-admin";
import { applyDefaultMarkupToPatch } from "../src/lib/server/stock-default-markup-service";
import { readFileSync } from "node:fs";
import { join } from "node:path";

const IMPORT_JSON = join(
  import.meta.dirname,
  "nss-spring-pins-iso8752-pb-import.json",
);

const args = process.argv.slice(2);
const dryRun = args.includes("--dry-run");
const limitArg = args.find((a) => a.startsWith("--limit="));
const limit = limitArg ? Number(limitArg.split("=")[1]) : Infinity;

type ImportRecord = {
  name: string;
  sku: string;
  description: string;
  location: string;
  notes: string;
  cost_history: Array<{
    price: number;
    currency: string;
    source: string;
    extracted_at: string;
    source_url: string;
    qty_basis: number;
    extraction_method: string;
    notes: string;
  }>;
  cost_price: number;
  unit: string;
  current_qty: number;
  min_qty: number;
  target_qty: number;
  is_active: boolean;
  supplier: string;
  category: string;
};

function buildPatch(r: ImportRecord): Record<string, unknown> {
  const seedEntry = {
    cost_price: r.cost_price,
    quantity: 0,
    purchased_at: r.cost_history[0]?.extracted_at ?? new Date().toISOString(),
    purchase_id: "nss-spring-pins-iso8752-2026-09-16",
    supplier_id: r.supplier,
    source: "nssfasteners.co.za",
    source_url: r.cost_history[0]?.source_url ?? "",
    currency: r.cost_history[0]?.currency ?? "ZAR",
    qty_basis: r.cost_history[0]?.qty_basis ?? 1,
    extraction_method:
      r.cost_history[0]?.extraction_method ?? "browser_automation",
    notes: r.cost_history[0]?.notes ?? r.location,
  };

  return applyDefaultMarkupToPatch(
    {
      sku: r.sku,
      name: r.name,
      description: r.description,
      unit: r.unit,
      location: r.location,
      current_qty: r.current_qty,
      min_qty: r.min_qty,
      target_qty: r.target_qty,
      supplier: r.supplier,
      category: r.category,
      is_active: r.is_active,
      notes: r.notes,
      cost_price: r.cost_price,
      cost_history: [seedEntry],
    },
    undefined,
  );
}

async function loadExistingSkus(): Promise<Set<string>> {
  const pb = await getAdminPocketBase();
  const rows = await pb.collection("stock_items").getFullList<{ sku: string }>({
    fields: "sku",
    batch: 500,
  });
  return new Set(rows.map((r) => (r.sku || "").trim()).filter(Boolean));
}

async function main(): Promise<void> {
  const t0 = Date.now();
  const importDoc = JSON.parse(readFileSync(IMPORT_JSON, "utf8")) as {
    records: ImportRecord[];
  };
  const allRecords = importDoc.records;
  const records = Number.isFinite(limit)
    ? allRecords.slice(0, limit)
    : allRecords;

  console.log(`Loaded ${allRecords.length} records from ${IMPORT_JSON}`);
  if (records.length < allRecords.length) {
    console.log(`  --limit applied: running on first ${records.length}`);
  }
  console.log(`Mode: ${dryRun ? "DRY RUN (no writes)" : "WRITE"}`);

  const existingSkus = await loadExistingSkus();
  console.log(`Existing SKUs in PB: ${existingSkus.size}`);

  const toIngest = records.filter((r) => !existingSkus.has(r.sku));
  const skipped = records.filter((r) => existingSkus.has(r.sku));
  console.log(`Records to ingest: ${toIngest.length}`);
  if (skipped.length > 0) {
    console.log(`Records skipped (already in PB): ${skipped.length}`);
  }

  if (dryRun) {
    console.log("\nDry run — preview of what would be written:\n");
    let i = 0;
    for (const r of toIngest.slice(0, 5)) {
      const patch = buildPatch(r);
      console.log(
        `  [${++i}] ${patch.sku}  ${patch.name}  cost=R ${patch.cost_price}  sell=R ${patch.selling_price}  markup=${patch.markup}%  cat=${patch.category}`,
      );
    }
    if (toIngest.length > 5) {
      console.log(`  ... and ${toIngest.length - 5} more`);
    }
    console.log(`\n  duration: ${((Date.now() - t0) / 1000).toFixed(1)}s`);
    return;
  }

  const pb = await getAdminPocketBase();
  let created = 0;
  let failed = 0;
  const failures: Array<{ sku: string; error: string }> = [];

  for (const r of toIngest) {
    try {
      const patch = buildPatch(r);
      await pb.collection("stock_items").create(patch);
      created++;
      if (created % 50 === 0 || created === toIngest.length) {
        console.log(
          `  ... ${created}/${toIngest.length} written (last: ${patch.sku})`,
        );
      }
    } catch (err) {
      failed++;
      const message = err instanceof Error ? err.message : String(err);
      failures.push({ sku: r.sku, error: message });
    }
  }

  console.log("\n=== Ingest summary ===");
  console.log(`  Created:   ${created}`);
  console.log(`  Failed:    ${failed}`);
  console.log(`  Skipped:   ${skipped.length} (already in PB)`);
  console.log(`  Duration:  ${((Date.now() - t0) / 1000).toFixed(1)}s`);

  if (failures.length > 0) {
    console.log("\nFailures:");
    for (const f of failures) {
      console.log(`  ${f.sku}  →  ${f.error}`);
    }
    process.exitCode = 1;
  }
}

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