'use strict'

// Run a public Cabal-compatible HyperDHT bootstrap node in the foreground.
// Put this under a service manager and advertise the reachable IPv4 host/UDP port.
const { loadCabalCore } = require('./cable_hyperswarm')

async function main () {
  const host = process.argv[2]
  const port = Number(process.argv[3])
  if (!host || !Number.isInteger(port) || port < 1 || port > 65535) {
    throw new Error('usage: cable bootstrap serve <public-ipv4-host> <udp-port>')
  }
  const { requireCabal } = loadCabalCore()
  const DHT = requireCabal('hyperdht')
  const node = DHT.bootstrapper(port, host)
  await node.ready()
  const address = node.address()
  process.stdout.write('Cabal Hyperswarm bootstrap serving ' + host + ':' + address.port +
    ' (bound ' + address.host + ':' + address.port + ')\n')
  const close = async () => {
    try { await node.destroy() } finally { process.exit(0) }
  }
  process.once('SIGINT', close)
  process.once('SIGTERM', close)
}

if (require.main === module) main().catch(err => {
  process.stderr.write((err && err.stack) || String(err))
  process.stderr.write('\n')
  process.exitCode = 1
})

module.exports = { main }