const { fetchJSONWithRetry } = require("../services/http-helpers");
const { PEERINGDB_API_KEY } = require("../services/peeringdb");
const { trackVisitor } = require("../visitors");

// Name Search (RIPE Stat + PeeringDB combined)
async function handleSearch(req, res) {
  const params = new URL(req.url, 'http://localhost').searchParams;
  const q = (params.get('q') || '').trim();
  res.setHeader('Content-Type', 'application/json');
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Cache-Control', 'public, max-age=120');
  if (!q || q.length < 2) { res.writeHead(400); return res.end(JSON.stringify({error:'query too short'})); }
  try {
    const results = [];
    const seen = new Set();

    // Source 1: RIPE Stat searchcomplete (fast, covers ASNs + org names)
    try {
      const ripeUrl = 'https://stat.ripe.net/data/searchcomplete/data.json?resource=' + encodeURIComponent(q);
      const ripeData = await fetchJSONWithRetry(ripeUrl, { timeout: 6000 });
      const cats = ripeData && ripeData.data && ripeData.data.categories || [];
      for (var ci = 0; ci < cats.length; ci++) {
        var suggs = cats[ci].suggestions || [];
        for (var si = 0; si < suggs.length; si++) {
          var s = suggs[si];
          var val = (s.value || '').toString();
          // Only ASN results
          if (/^AS\d+$/i.test(val) && !seen.has(val)) {
            seen.add(val);
            // Use description (e.g. "FLEXOPTIX, DE") as the display label
            var ripeName = s.description || s.label || val;
            results.push({ asn: val.replace(/^AS/i,''), label: ripeName, description: '', source: 'RIPE Stat' });
          }
        }
      }
    } catch(e) { /* RIPE Stat failed, continue */ }

    // Source 2: PeeringDB name search (best for network operator names)
    try {
      var pdbUrl = 'https://www.peeringdb.com/api/net?name__icontains=' + encodeURIComponent(q) + '&depth=1&limit=10';
      if (PEERINGDB_API_KEY) pdbUrl += '&key=' + PEERINGDB_API_KEY;
      const pdbData = await fetchJSONWithRetry(pdbUrl, { timeout: 8000 });
      var nets = pdbData && pdbData.data || [];
      for (var ni = 0; ni < nets.length; ni++) {
        var net = nets[ni];
        var asnKey = 'AS' + net.asn;
        if (net.asn && !seen.has(asnKey)) {
          seen.add(asnKey);
          var pdbDesc = [net.info_type, net.country].filter(Boolean).join(' · ');
          results.push({
            asn: String(net.asn),
            label: net.name || asnKey,
            description: pdbDesc,
            source: 'PeeringDB'
          });
        }
      }
    } catch(e) { /* PeeringDB failed, continue */ }

    // Sort: RIPE results first (usually more relevant for ASN lookup), then PeeringDB
    results.sort((a, b) => {
      if (a.source === b.source) return 0;
      return a.source === 'RIPE Stat' ? -1 : 1;
    });

    res.writeHead(200);
    return res.end(JSON.stringify({ q: q, results: results.slice(0, 12) }));
  } catch(e) {
    res.writeHead(500); return res.end(JSON.stringify({error: e.message}));
  }
}

// GET /api/visitors — unique visitor count
function handleVisitors(req, res) {
  res.setHeader("Content-Type", "application/json");
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader("Cache-Control", "no-store");
  const count = trackVisitor(req);
  res.writeHead(200);
  return res.end(JSON.stringify({ visitors: count }));
}

module.exports = { handleSearch, handleVisitors };