import { NextResponse } from 'next/server';
import { listArticles } from '@/lib/engine';

// GET /api/search?q=foo — простой поиск по title/excerpt/tags
export async function GET(req) {
  const q = (req.nextUrl.searchParams.get('q') || '').trim().toLowerCase();
  if (!q || q.length < 2) return NextResponse.json([]);

  try {
    const all = await listArticles({ limit: 100 });
    const tokens = q.split(/\s+/).filter(Boolean);

    const matched = all
      .map(a => {
        const haystack = [a.title, a.excerpt, (a.tags || []).join(' ')]
          .filter(Boolean).join(' ').toLowerCase();
        const score = tokens.reduce((acc, t) => acc + (haystack.includes(t) ? 1 : 0), 0);
        return { ...a, score };
      })
      .filter(a => a.score > 0)
      .sort((a, b) => b.score - a.score)
      .slice(0, 12);

    return NextResponse.json(matched);
  } catch (err) {
    return NextResponse.json({ error: err.message }, { status: 500 });
  }
}