import { NextRequest, NextResponse } from "next/server";
import { createSpacedRepetitionSetSchema } from "@/lib/validation/spacedRepetitionSchemas";
import { spacedRepetitionErrorResponse } from "@/lib/spacedRepetitionApi";
import * as spacedRepetitionService from "@/services/spacedRepetitionService";

export async function GET(request: NextRequest) {
  const classId = new URL(request.url).searchParams.get("classId");
  if (!classId) return NextResponse.json({ error: "classId is required" }, { status: 400 });
  try {
    return NextResponse.json(await spacedRepetitionService.listSetsByClass(classId));
  } catch (error) {
    return spacedRepetitionErrorResponse(error);
  }
}

export async function POST(request: NextRequest) {
  const parsed = createSpacedRepetitionSetSchema.safeParse(
    await request.json().catch(() => null)
  );
  if (!parsed.success) {
    return NextResponse.json({ error: "Invalid repetition set" }, { status: 400 });
  }
  try {
    return NextResponse.json(await spacedRepetitionService.createSet(parsed.data), {
      status: 201,
    });
  } catch (error) {
    return spacedRepetitionErrorResponse(error);
  }
}