import { NextRequest, NextResponse } from "next/server";
import { directusFetch } from "@/lib/directus";

export async function GET(req: NextRequest) {
  const { searchParams } = new URL(req.url);
  const target = searchParams.get("target") || "";
  const group  = searchParams.get("group")  || "";
  const field  = searchParams.get("field")  || "type";
  if (!target || !group) return NextResponse.json({ error: "missing target/group" }, { status: 400 });

  const meta = await directusFetch<any>(`/fields/${target}/${group}?fields=meta`);
  const fields = meta?.data?.meta?.options?.fields ?? [];
  const nested = fields.find((f: any) => (f?.field ?? f?.key) === field);
  const choices = nested?.options?.choices ?? nested?.meta?.options?.choices ?? [];

  const out = (choices as any[])
    .map((c) => ({
      id: String(c.value ?? c.text ?? c.label ?? ""),
      label: String(c.text ?? c.label ?? c.value ?? ""),
    }))
    .filter((o) => o.id)
    .sort((a, b) => a.label.localeCompare(b.label));

  return NextResponse.json({ data: out });
}