/**
 * Search-box.ai
 * Author: Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * File: apps/web/app/api/research/[id]/route.ts
 * Description: GET — full snapshot of a research session (state + citations).
 */

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

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

export async function GET(
  _req: Request,
  { params }: { params: Promise<{ id: string }> }
): Promise<NextResponse> {
  await ensureMigrated();
  const { id } = await params;
  const session = await sessions.get(id);
  if (!session) return NextResponse.json({ error: "not found" }, { status: 404 });

  const state = new ResearchState(id);
  const snap = await state.snapshot();
  const citations = snap.sources
    .filter((s) => s.citationIndex !== null)
    .sort((a, b) => (a.citationIndex ?? 0) - (b.citationIndex ?? 0))
    .map((s) => ({ index: s.citationIndex as number, sourceId: s.id, url: s.url, title: s.title }));

  return NextResponse.json({ session, ...snap, citations });
}