import { query } from "@/lib/db";
import { loadTranslationsFor } from "@/lib/db/translations";
import { listActiveLanguageCodes } from "@/lib/db/languages";
import { authErrorResponse, requireRole } from "@/lib/auth/session";
import { toCsv } from "@/lib/csv";

interface DishRow {
  id: string;
  name: string;
  price: string;
  allergens: string[];
  additives: string[];
}

export async function GET() {
  try {
    await requireRole(["staff", "admin"]);
    const [dishes, activeCodes] = await Promise.all([
      query<DishRow>("select id, name, price, allergens, additives from dishes order by name"),
      listActiveLanguageCodes(),
    ]);
    const langCodes = activeCodes.filter((c) => c !== "de");
    const translations = await loadTranslationsFor(
      "dish_translations",
      dishes.map((d) => d.id)
    );
    const rows = [
      ["name", ...langCodes.map((c) => `name_${c}`), "price", "allergens", "additives"],
      ...dishes.map((d) => [
        d.name,
        ...langCodes.map((c) => translations.get(d.id)?.[c] ?? ""),
        d.price,
        (d.allergens ?? []).join(";"),
        (d.additives ?? []).join(";"),
      ]),
    ];
    return new Response(toCsv(rows), {
      headers: {
        "Content-Type": "text/csv; charset=utf-8",
        "Content-Disposition": 'attachment; filename="gerichte.csv"',
      },
    });
  } catch (err) {
    const res = authErrorResponse(err);
    if (res) return res;
    throw err;
  }
}