// app/api/options/lens/route.ts
export const dynamic = "force-dynamic";

import { NextRequest, NextResponse } from "next/server";

const BASE = (process.env.DIRECTUS_URL || "").replace(/\/$/, "");

function buildPath(target?: string | null) {
  // Adjust the collection name if yours differs (e.g., laser_scan_lens)
  const url = new URL(`${BASE}/items/laser_scan_lens`);
  url.searchParams.set("fields", "id,name");
  url.searchParams.set("sort", "name");
  // Example if you model per-target lenses:
  // if (target) url.searchParams.set("filter[target][_eq]", target);
  return String(url);
}

async function dFetch(bearer: string, target?: string | null) {
  const res = await fetch(buildPath(target), {
    headers: { Accept: "application/json", Authorization: `Bearer ${bearer}` },
    cache: "no-store",
  });
  const text = await res.text().catch(() => "");
  let json: any = null;
  try { json = text ? JSON.parse(text) : null; } catch {}
  return { res, json, text };
}

export async function GET(req: NextRequest) {
  try {
    const userAt = req.cookies.get("ma_at")?.value;
    if (!userAt) return NextResponse.json({ error: "Not authenticated" }, { status: 401 });

    const target = req.nextUrl.searchParams.get("target");
    const r = await dFetch(userAt, target);
    if (!r.res.ok) {
      return NextResponse.json(
        { error: `Directus ${r.res.status}: ${r.text || r.res.statusText}` },
        { status: r.res.status }
      );
    }

    const rows: Array<{ id: number | string; name: string }> = r.json?.data ?? [];
    const data = rows.map(({ id, name }) => ({ id, name }));
    return NextResponse.json({ data });
  } catch (e: any) {
    return NextResponse.json({ error: e?.message || "Failed to load lenses" }, { status: 500 });
  }
}