/**
 * Search-box.ai
 * Author: Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * File: apps/web/app/api/research/route.ts
 * Description: POST — start a research session; GET — list recent sessions.
 */

import { NextResponse } from "next/server";
import { sessions } from "@search-box/db";
import { ensureMigrated, startResearch } from "@/lib/runner";

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

export async function POST(req: Request): Promise<NextResponse> {
  let body: unknown;
  try {
    body = await req.json();
  } catch {
    return NextResponse.json({ error: "invalid JSON body" }, { status: 400 });
  }
  const question =
    typeof body === "object" && body !== null && "question" in body
      ? String((body as { question: unknown }).question ?? "").trim()
      : "";
  if (question.length < 8 || question.length > 2000) {
    return NextResponse.json({ error: "question must be 8–2000 characters" }, { status: 400 });
  }
  const id = await startResearch(question);
  return NextResponse.json({ id }, { status: 201 });
}

export async function GET(): Promise<NextResponse> {
  await ensureMigrated();
  const list = await sessions.list(30);
  return NextResponse.json({
    sessions: list.map((s) => ({
      id: s.id,
      question: s.question,
      status: s.status,
      createdAt: s.createdAt
    }))
  });
}