import { NextResponse } from 'next/server';
import { loadSession } from '@/lib/ai/research';
import { currentUserId, getAnonId } from '@/lib/ai/request';

export const runtime = 'nodejs';

export async function GET(_req: Request, ctx: { params: Promise<{ id: string }> }) {
  const { id } = await ctx.params;
  const [userId, anonId] = await Promise.all([currentUserId(), getAnonId(false)]);
  const loaded = await loadSession(id, { anonId, userId });
  if (!loaded) return NextResponse.json({ error: 'Not found' }, { status: 404 });
  return NextResponse.json({
    session: { id: loaded.session.id, title: loaded.session.title, usdEst: loaded.session.usdEst, model: loaded.session.model },
    messages: loaded.messages.map((m) => ({ id: m.id, role: m.role, content: m.content, toolCalls: m.toolCalls, createdAt: m.createdAt })),
  });
}