// Update preloader
var assert = require('assert');
var dns = require('dns');
var net = require('net');
var path = require('path');
var bcoin = require('../');

var addrs = [
  'seed.bitcoin.sipa.be',
  'dnsseed.bluematt.me',
  'dnsseed.bitcoin.dashjr.org',
  'seed.bitcoinstats.com',
  'seed.bitnodes.io',
  'bitseed.xf2.org'
];

var pool = bcoin.pool({
  count: 16,
  createConnection: function() {
    return net.connect(8333, addrs[(Math.random() * addrs.length) | 0]);
  }
});

console.log('Updating bcoin preloaded chain...');

var last = 0;
pool.on('block', function(block) {
  if (block.ts <= last)
    return;
  console.log('Got: ' + block.hash('hex') + ' ' + new Date(block.ts * 1000));
});

pool.once('full', finish);
process.once('SIGINT', finish);

var once = false;
function finish() {
  if (once)
    return;
  once = true;

  console.log('Done...');
  var chain = '// Autogenerated, use scripts/update.js to update\n' +
              'module.exports = ' +
              JSON.stringify(pool.chain.toJSON(), null, 2) + '\n';
  var file =
      path.resolve(__dirname, '..', 'lib', 'bcoin', 'protocol', 'preload.js');

  require('fs').writeFileSync(file, chain);
  pool.destroy();
}