(function(videojs) {
  'use strict';

  /**
   * A wrapper for videojs.xhr that tracks bandwidth.
   */
  videojs.Hls.xhr = function(options, callback) {
    // Add a default timeout for all hls requests
    options = videojs.mergeOptions({
       timeout: 45e3
     }, options);

    var request = videojs.xhr(options, function(error, response) {
      if (!error && request.response) {
        request.responseTime = (new Date()).getTime();
        request.roundTripTime = request.responseTime - request.requestTime;
        request.bytesReceived = request.response.byteLength || request.response.length;
        if (!request.bandwidth) {
          request.bandwidth = Math.floor((request.bytesReceived / request.roundTripTime) * 8 * 1000);
        }
      }

      // videojs.xhr now uses a specific code on the error object to signal that a request has
      // timed out errors of setting a boolean on the request object
      if (error || request.timedout) {
        request.timedout = request.timedout || (error.code === 'ETIMEDOUT');
      } else {
        request.timedout = false;
      }

      // videojs.xhr no longer considers status codes outside of 200 and 0
      // (for file uris) to be errors, but the old XHR did, so emulate that
      // behavior. Status 206 may be used in response to byterange requests.
      if (!error &&
           response.statusCode !== 200 &&
           response.statusCode !== 206 &&
           response.statusCode !== 0) {
        error = new Error('XHR Failed with a response of: ' +
          (request && (request.response || request.responseText)));
      }

      callback(error, request);
    });

    request.requestTime = (new Date()).getTime();
    return request;
  };
})(window.videojs);