const HTTPS_PORT = 8443;

const devcert = require('devcert');
const fs = require('fs');
const https = require('https');
const WebSocket = require('ws');
const WebSocketServer = WebSocket.Server;

// ----------------------------------------------------------------------------------------

// Create a server for the client html page
const handleRequest = function(request, response) {
  // Render the single client html file for any request the HTTP server receives
  console.log('request received: ' + request.url);

  if (request.url === '/') {
    response.writeHead(200, { 'Content-Type': 'text/html' });
    response.end(fs.readFileSync('client/index.html'));
  } else if (request.url === '/webrtc.js') {
    response.writeHead(200, { 'Content-Type': 'application/javascript' });
    response.end(fs.readFileSync('client/webrtc.js'));
  }
};

devcert.certificateFor('webrtc.example').then(function(ssl) {
  const httpsServer = https.createServer(ssl, handleRequest);
  httpsServer.listen(HTTPS_PORT, '0.0.0.0');

  // ----------------------------------------------------------------------------------------

  // Create a server for handling websocket calls
  const wss = new WebSocketServer({ server: httpsServer });

  wss.on('connection', function(ws) {
    ws.on('message', function(message) {
      // Broadcast any received message to all clients
      console.log('received: %s', message);
      wss.broadcast(message);
    });
  });

  wss.broadcast = function(data) {
    this.clients.forEach(function(client) {
      if (client.readyState === WebSocket.OPEN) {
        client.send(data);
      }
    });
  };

  console.log(
    'Server running. Visit https://webrtc.example:' +
      HTTPS_PORT +
      ' in Firefox/Chrome.\n\n\
Some important notes:\n\
  * Note the HTTPS; there is no HTTP -> HTTPS redirect.\n\
  * Some browsers or OSs may not allow the webcam to be used by multiple pages at once. You may need to use two different browsers or machines.\n'
  );
});