import { NextRequest, NextResponse } from "next/server"
import { getNextExercise } from "@/lib/curriculum/engine"

export async function GET(request: NextRequest) {
  const childId = request.nextUrl.searchParams.get("childId")
  const topic = (request.nextUrl.searchParams.get("topic") || "lectura") as "lectura" | "numeros"
  if (!childId) {
    return NextResponse.json({ error: "childId required" }, { status: 400 })
  }

  const exercise = await getNextExercise(childId, topic)
  return NextResponse.json(exercise || { id: null, done: true })
}