// http Server
// Purpose: Defines the http Server module and the helpers/state used by this service unit.
// Scope: Keeps runtime behavior unchanged while isolating responsibilities into a clear module boundary.
const { httpServer } = require('../../globals/http');
const config = require('../../globals/config');
const logger = require('../../globals/logger').child('httpServer');
const { startMediaMtx } = require('../mediaMtxService');
const backupRestoreService = require('../backupRestoreService');

httpServer.listen(config.port, () => {
  logger.info(`Server listening on :${config.port}`);
  /*
    MediaMTX immediately calls the server's HTTP authorization route when clients connect.
    Starting it from the listen callback guarantees that endpoint is reachable before the
    first publisher attempts to authenticate.
  */
  startMediaMtx();
  /*
    Give child processes and startup integrations a short stabilization window
    after restored databases migrate and HTTP begins listening. If the process
    exits during that window, earliest startup sees the awaiting-health marker
    and restores the prior data instead of accepting a broken replacement.
  */
  setTimeout(() => backupRestoreService.markStartupSuccessful(), 5000);
});

function stopAcceptingConnections() {
  /*
    Child-process services already own their SIGTERM cleanup. The HTTP service
    only stops accepting new work; MediaMTX's bounded signal handler remains
    responsible for ending the Node process even if an existing socket keeps
    the close callback waiting.
  */
  if (httpServer.listening) httpServer.close();
}

process.once('SIGINT', stopAcceptingConnections);
process.once('SIGTERM', stopAcceptingConnections);