const addrToIPPort = require('addr-to-ip-port');
const bencode = require('bencode');

const fakePeerId = require('../fakePeerId');

module.exports = (peers, res) => {
  const response = bencode.encode({
    interval: 30 * 60, // 30 minutes between requests
    peers: peers.map((peer) => {
      const [ip, port] = addrToIPPort(peer);
      return {
        ip,
        'peer id': fakePeerId(peer),
        port,
      };
    }),
  });
  res
    .set({
      'Content-Length': response.length,
    })
    .end(response);
};