import { NextResponse } from "next/server";
import { z } from "zod";
import { answerQuestion } from "@/lib/questions";

const questionSchema = z.object({
  question: z.string().min(4).max(1200),
  language: z.enum(["DE", "EN"]).default("DE"),
});

export async function POST(request: Request) {
  const parsed = questionSchema.safeParse(await request.json());
  if (!parsed.success) {
    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
  }

  try {
    const answer = await answerQuestion(parsed.data.question, parsed.data.language);
    return NextResponse.json({ answer });
  } catch (error) {
    return NextResponse.json(
      { error: error instanceof Error ? error.message : "Question answering failed" },
      { status: 500 },
    );
  }
}