import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth';
import { prewarmWorkspace } from '@/lib/cloud-run-workspace';

/**
 * POST /api/projects/prewarm
 * Body: { urls: string[] }
 *
 * Fires warm-up requests to Cloud Run workspace URLs so containers
 * are running by the time the user clicks "Open IDE". Server-side
 * to avoid CORS issues with run.app domains.
 */
export async function POST(req: NextRequest) {
  const session = await getServerSession(authOptions);
  if (!session?.user) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const { urls } = await req.json() as { urls: string[] };
  if (!Array.isArray(urls) || urls.length === 0) {
    return NextResponse.json({ warmed: 0 });
  }

  // Fire all prewarm pings in parallel — intentionally not awaited
  Promise.allSettled(urls.map(url => prewarmWorkspace(url))).catch(() => {});

  return NextResponse.json({ warmed: urls.length });
}