import { NextRequest } from "next/server";
import { listWords } from "@/lib/db";
import { buildWordExcel } from "@/lib/word-excel";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

export async function GET(request: NextRequest) {
  const searchParams = request.nextUrl.searchParams;
  const grade = searchParams.get("grade") ?? undefined;
  const classTypeId = Number(searchParams.get("classTypeId"));
  const words = listWords({
    grade,
    classTypeId: Number.isFinite(classTypeId) && classTypeId > 0 ? classTypeId : undefined,
  });
  const workbook = buildWordExcel(words);

  return new Response(workbook, {
    headers: {
      "Content-Type": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "Content-Disposition": `attachment; filename="${encodeURIComponent("词库导入表格")}.xlsx"`,
      "Cache-Control": "no-store",
    },
  });
}