/**
 * One-off stock_items query: list every active `stock_items` row
 * whose `sku`, `name`, or `description` matches a configurable
 * substring (default "irda", override with `--term=`), then narrow
 * the list to spray cans. Read-only — never writes to PB.
 *
 * Why this exists
 * ────────────────
 * The operator wanted a quick read-out of the IRDA spray-paint line
 * without going through the UI. This script mirrors the CLI pattern
 * from `apply-default-markup.ts` (admin PB, side-effect env load,
 * pure filter + expand) so it can be deleted without leaving any
 * shared code behind.
 *
 * Matching rules
 * ──────────────
 *  - Search term (default `irda`) is matched case-insensitively
 *    against `sku`, `name`, OR `description` via PB's `~` operator.
 *    Override with `--term=...` if the actual brand in the catalogue
 *    is spelled differently (the IRDA line in this catalogue is
 *    actually "IRIDA" — pass `--term=irida` to surface it).
 *  - Only `is_active = true`.
 *  - Spray narrowing happens client-side. The script prints three
 *    views so the operator can see which sub-marker matches each
 *    row: literal phrase "spray paint", standalone word "spray",
 *    and the union ("spray" OR the H/HEAT variant marker). The
 *    summary uses the union view.
 *
 * Output
 * ──────
 *  - Markdown table: SKU | Name | Current Qty | Cost (R) | Selling
 *    (R) | Markup | Supplier, sorted by `name` ASC.
 *  - Summary block: total, items WITHOUT `selling_price`, items
 *    WITHOUT `cost_price`, zero-stock items.
 *
 * Run with:
 *   npx tsx scripts/list-irda-stock.ts                 # default term: "irda"
 *   npx tsx scripts/list-irda-stock.ts --term=irida    # override term
 *
 * Requires .env.local with NEXT_PUBLIC_POCKETBASE_URL,
 * PB_ADMIN_EMAIL, PB_ADMIN_PASSWORD.
 */

import "./_env"; // side-effect import: loads .env.local before anything else

import { getAdminPocketBase } from "../src/lib/server/pocketbase-admin";

// ─── Constants ────────────────────────────────────────────────────────

/** Default search term. PB's `~` operator is case-insensitive, so
 *  casing here doesn't matter for matching — but the literal does
 *  appear in the report headers. */
const DEFAULT_SEARCH_TERM = "irda";

/** Narrowing marker. The user's request was for "irda spray paints"
 *  (literal phrase). The IRIDA line in stock_items labels every
 *  product with one of two sub-markers:
 *    - "SPRAY" (e.g. "HB IRIDA SPRAY 9010 WHITE GLOS") — the
 *      standard aerosol cans.
 *    - "H/HEAT" (e.g. "HB IRIDA H/HEAT 420 BLACK") — the heat-
 *      resistant variant, still an aerosol spray can, just a
 *      different formulation under the same IRIDA product line.
 *  Neither sub-marker uses the literal phrase "spray paint". So
 *  the narrow view in the report accepts EITHER:
 *    - the literal phrase "spray paint" (catches 0 of the IRIDA
 *      rows — useful as a baseline showing the phrase is wrong
 *      for this catalogue), OR
 *    - either of the two IRIDA sub-markers (catches all 28
 *      IRIDA rows).
 *  Both views are printed so the operator can see exactly which
 *  filter triggered for each row. */
const SPRAY_PHRASE = "spray paint";
const SPRAY_WORD = "spray";
const HEAT_VARIANT_WORD = "h/heat";

// ─── CLI parsing ──────────────────────────────────────────────────────

type CliOptions = { term: string };

function parseCli(argv: string[]): CliOptions {
  const opts: CliOptions = { term: DEFAULT_SEARCH_TERM };
  for (const arg of argv) {
    if (arg === "--help" || arg === "-h") {
      printHelp();
      process.exit(0);
    } else if (arg.startsWith("--term=")) {
      const raw = arg.slice("--term=".length).trim();
      if (!raw) throw new Error(`--term must be non-empty, got "${arg}"`);
      opts.term = raw;
    } else {
      throw new Error(`Unknown CLI flag: ${arg}`);
    }
  }
  return opts;
}

function printHelp(): void {
  console.log(
    `List active stock_items rows whose sku/name/description match a search term,\nnarrowed to spray paints.\n`,
  );
  console.log(`Usage:
  tsx scripts/list-irda-stock.ts                 # default: term="irda"
  tsx scripts/list-irda-stock.ts --term=irida    # override term

Flags:
  --term=XYZ   Substring to match (case-insensitive) against
               sku/name/description. Default: "irda".
  --help, -h   Show this help.`);
}

// ─── Types ────────────────────────────────────────────────────────────

/** Single `stock_items` row shape — the fields we read for the
 *  table. `expand.supplier` is the joined supplier name. */
type IrdaStockRow = {
  id: string;
  sku: string;
  name: string;
  description: string;
  current_qty: number;
  cost_price?: number | null;
  selling_price?: number | null;
  markup?: number | null;
  supplier?: string;
  expand?: {
    supplier?: { id?: string; suppliername?: string };
  };
};

// ─── Formatting ────────────────────────────────────────────────────────

/** Format a number as R X.XX, or em-dash for missing/non-finite
 *  values (so the table reads cleanly when a row has no selling
 *  price). */
function fmtMoney(n: number | null | undefined): string {
  if (typeof n !== "number" || !Number.isFinite(n)) return "—";
  return `R ${n.toFixed(2)}`;
}

/** Render the markdown table row. SKU/Name left-aligned; numbers
 *  right-aligned via the `---:` colon convention. Supplier falls
 *  back to "—" when the relation is unset so a missing supplier
 *  reads as such in the table rather than blowing up. */
function renderTable(rows: IrdaStockRow[]): string {
  const lines: string[] = [];
  lines.push(
    "| SKU | Name | Current Qty | Cost (R) | Selling (R) | Markup | Supplier |",
  );
  lines.push(
    "| --- | --- | ---: | ---: | ---: | ---: | --- |",
  );

  for (const r of rows) {
    const sku = r.sku || "(no sku)";
    const name = r.name || "(no name)";
    const qty = Number.isFinite(r.current_qty) ? r.current_qty : 0;
    const supplier =
      r.expand?.supplier?.suppliername?.trim() || "—";

    lines.push(
      `| ${sku} | ${name} | ${qty} | ${fmtMoney(r.cost_price)} | ${fmtMoney(r.selling_price)} | ${r.markup ?? "—"} | ${supplier} |`,
    );
  }

  return lines.join("\n");
}

// ─── PB plumbing ──────────────────────────────────────────────────────

/**
 * Pull every `stock_items` row matching the configured search term
 * (case-insensitive `~` on `sku`, `name`, or `description`) where
 * `is_active = true`.
 *
 * Server-side filter (rather than full-table scan + JS filter)
 * keeps the round-trip small even if the catalogue grows. The
 * `~` operator is PB's case-insensitive contains.
 *
 * The "spray paint" narrowing happens client-side on top of the
 * filtered result. Two reasons:
 *  - Mixing two `~` clauses with `||` chains is fine in PB but
 *    `(A ~ x || A ~ y || B ~ x || B ~ y)` gets ugly fast and is
 *    easy to get wrong when someone adjusts the term.
 *  - We want the script's "non-spray-paint matches" count in
 *    the summary to be authoritative without a second PB round-
 *    trip — that count comes from the same client-side pass.
 */
async function listMatchingStockItems(term: string): Promise<IrdaStockRow[]> {
  const pb = await getAdminPocketBase();
  // Escape `"` so a hostile/malformed term can't break out of the
  // filter string. `~` itself takes care of case-insensitivity;
  // no other special chars in the term are filter-significant.
  const safeTerm = term.replace(/"/g, '\\"');
  // We deliberately do NOT pass a `fields` projection here: PB's
  // `fields` projection drops the `expand` payload, so passing
  // `fields=...` together with `expand=supplier` returns rows
  // with `expand: undefined` even though the relation field is
  // populated. The full record is small (28 rows max for the
  // "irida" case) so the round-trip cost is negligible.
  const rows = await pb.collection("stock_items").getFullList<IrdaStockRow>({
    filter:
      `(sku ~ "${safeTerm}" || name ~ "${safeTerm}" || description ~ "${safeTerm}") && is_active = true`,
    expand: "supplier",
    sort: "name",
    batch: 500,
  });
  return rows;
}

// ─── Main ─────────────────────────────────────────────────────────────

async function main(): Promise<void> {
  const opts = parseCli(process.argv.slice(2));
  const startTs = Date.now();
  const allMatchingRows = await listMatchingStockItems(opts.term);

  // Client-side spray-paint narrowing. Three filters:
  //   - `isSprayPaintPhrase`: literal phrase "spray paint" in
  //     name or description (case-insensitive).
  //   - `isSpray`: standalone word "spray" — catches the
  //     standard IRIDA spray cans ("HB IRIDA SPRAY ...").
  //   - `isSprayOrHeatVariant`: word "spray" OR "h/heat" —
  //     catches BOTH the standard and high-heat IRIDA aerosol
  //     cans. This is the view the user actually wanted for
  //     "irda spray paints" — every IRIDA product in the
  //     catalogue is one or the other.
  const isSprayPaintPhrase = (row: IrdaStockRow): boolean => {
    const hay = `${row.name ?? ""} ${row.description ?? ""}`.toLowerCase();
    return hay.includes(SPRAY_PHRASE);
  };
  const isSpray = (row: IrdaStockRow): boolean => {
    const hay = `${row.name ?? ""} ${row.description ?? ""}`.toLowerCase();
    return hay.includes(SPRAY_WORD);
  };
  const isSprayOrHeatVariant = (row: IrdaStockRow): boolean => {
    const hay = `${row.name ?? ""} ${row.description ?? ""}`.toLowerCase();
    return hay.includes(SPRAY_WORD) || hay.includes(HEAT_VARIANT_WORD);
  };

  const phraseRows = allMatchingRows.filter(isSprayPaintPhrase);
  const sprayRows = allMatchingRows.filter(isSpray);
  const familyRows = allMatchingRows.filter(isSprayOrHeatVariant);
  const nonSprayRows = allMatchingRows.filter((r) => !isSprayOrHeatVariant(r));

  console.log(
    `=== stock_items matching "${opts.term}" (active only) — ALL rows ===\n`,
  );

  console.log(renderTable(allMatchingRows));
  console.log("");

  console.log(
    `\n=== spray-paint narrow (literal phrase "${SPRAY_PHRASE}") ===\n`,
  );
  console.log(renderTable(phraseRows));
  console.log("");

  console.log(
    `\n=== spray-paint narrow (word "${SPRAY_WORD}" only — catches IRIDA standard cans) ===\n`,
  );
  console.log(renderTable(sprayRows));
  console.log("");

  console.log(
    `\n=== spray-paint narrow (word "${SPRAY_WORD}" OR "${HEAT_VARIANT_WORD}" — full IRIDA spray family) ===\n`,
  );
  console.log(renderTable(familyRows));
  console.log("");

  // The user-facing summary uses the FULL-FAMILY view: every IRIDA
  // product in the catalogue is either a standard spray can or
  // the H/HEAT variant. The other views are printed so the
  // operator can compare and confirm the data is what they
  // expected.
  const summaryRows = familyRows;

  // Summary counts. "WITHOUT" is read as `null OR undefined OR 0`
  // — the same convention the `apply-default-markup.ts` report uses
  // (`cost_price <= 0`), so the two reports can be eyeballed
  // against each other.
  const total = summaryRows.length;
  const noSelling = summaryRows.filter(
    (r) => !(Number(r.selling_price) > 0),
  ).length;
  const noCost = summaryRows.filter(
    (r) => !(Number(r.cost_price) > 0),
  ).length;
  const zeroStock = summaryRows.filter(
    (r) => !(Number(r.current_qty) > 0),
  ).length;

  console.log(`\n=== Summary (full IRIDA spray family: "${SPRAY_WORD}" OR "${HEAT_VARIANT_WORD}") ===`);
  console.log(`  Total matching rows:                ${total}`);
  console.log(`  Items WITHOUT selling_price (gap):  ${noSelling}`);
  console.log(`  Items WITHOUT cost_price (gap):     ${noCost}`);
  console.log(`  Items with zero current_qty:        ${zeroStock}`);
  if (nonSprayRows.length > 0) {
    console.log(
      `  Matching rows that are NOT spray cans: ${nonSprayRows.length}`,
    );
    console.log(
      `    (these are listed in the ALL table above but excluded from the spray tables)`,
    );
  } else if (allMatchingRows.length > 0) {
    console.log(
      `  Matching rows that are NOT spray cans: 0 (every match is a spray can)`,
    );
  }

  const duration = ((Date.now() - startTs) / 1000).toFixed(1);
  console.log(`\n  duration: ${duration}s`);
}

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