// app/api/options/lens/route.ts
import { NextResponse } from "next/server";
import { directusFetch } from "@/lib/directus";

/** pick a decent label from whatever fields are readable */
function pickLabel(it: any) {
  const mm = [it?.make, it?.model].filter(Boolean).join(" ").trim();
  if (mm) return mm;
  if (it?.name) return String(it.name);
  const f = it?.focal_length ?? it?.f ?? it?.fl;
  if (f != null) return `${mm ? mm + " " : ""}${f} mm`.trim();
  return String(it?.label ?? it?.title ?? it?.id ?? "");
}

export async function GET(req: Request) {
  const { searchParams } = new URL(req.url);
  const target = searchParams.get("target") || ""; // required
  const q      = (searchParams.get("q") || "").toLowerCase();
  const limit  = Number(searchParams.get("limit") || "500");

  // Fiber / CO2 Galvo / UV -> scan lens ; CO2 Gantry -> focus lens
  const isGantry = target === "settings_co2gan";
  const coll = isGantry ? "laser_focus_lens" : "laser_scan_lens";

  // Avoid explicit fields -> prevents 403 on disallowed fields
  const res = await directusFetch<{ data: any[] }>(`/items/${coll}?limit=${limit}`);
  let items = res?.data ?? [];

  let rows = items.map((it) => {
    const label = pickLabel(it);
    const search = Object.values(it ?? {}).join(" ").toLowerCase();
    return { id: String(it?.id ?? ""), label, _search: search };
  }).filter((r) => r.id);

  if (q) rows = rows.filter((r) => r._search.includes(q));
  rows.sort((a, b) => a.label.localeCompare(b.label));

  return NextResponse.json({ data: rows.map(({ _search, ...r }) => r) });
}