/**
 * Helpers to run a Shields server in process.
 *
 * Usage:
 * let server;
 * before('Start running the server', function () {
 *   this.timeout(5000);
 *   server = serverHelpers.start();
 * });
 * after('Shut down the server', function () { serverHelpers.stop(server); });
 */

'use strict'

const config = require('./test-config')
const serverConfig = require('./server-config')

let startCalled = false

/**
 * Start the server.
 *
 * @param {Number} port number (optional)
 * @return {Object} The scoutcamp instance
 */
function start() {
  if (startCalled) {
    throw Error(
      'Because of the way Shields works, you can only use this ' +
        'once per node process. Once you call stop(), the game is over.'
    )
  }
  startCalled = true

  // Modifying config is a bit dirty, but it works, and avoids making bigger
  // changes to server.js.
  serverConfig.bind = {
    host: 'localhost',
    port: config.port,
  }
  const server = require('../server')
  return server
}

/**
 * Reset the server, to avoid or reduce side effects between tests.
 *
 * @param {Object} server instance
 */
function reset(server) {
  server.reset()
}

/**
 * Stop the server.
 *
 * @param {Object} server instance
 */
async function stop(server) {
  if (server) {
    await server.stop()
  }
}

module.exports = {
  start,
  reset,
  stop,
}