import { NextRequest, NextResponse } from "next/server";
import * as settingsService from "@/services/settingsService";

export async function GET(request: NextRequest) {
  const { searchParams } = new URL(request.url);
  const type = searchParams.get("type") as "flashcards" | "quizzes" || "flashcards";
  const instructions = await settingsService.getLlmInstructions(type);
  return NextResponse.json({ value: instructions });
}

export async function PATCH(request: NextRequest) {
  const { searchParams } = new URL(request.url);
  const type = searchParams.get("type") as "flashcards" | "quizzes" || "flashcards";
  const body = await request.json().catch(() => null);

  if (!body || typeof body.value !== "string") {
    return NextResponse.json(
      { error: "value is required" },
      { status: 400 }
    );
  }

  if (body.value === "__RESET__") {
    await settingsService.resetLlmInstructions(type);
    const instructions = await settingsService.getLlmInstructions(type);
    return NextResponse.json({ value: instructions });
  }

  await settingsService.updateLlmInstructions(type, body.value);
  return NextResponse.json({ value: body.value });
}