(function () {
  "use strict";
  var NativeXHR = window.XMLHttpRequest;

  function apiPath(url) {
    var match = String(url || "").match(/\/index\/[^?#]*/);
    return match ? match[0] : "";
  }

  function BridgeXHR() {
    this._xhr = new NativeXHR();
    this._isGameApi = false;
  }

  BridgeXHR.prototype.open = function (method, url) {
    var path = apiPath(url);
    this._isGameApi = path.indexOf("/index/") === 0;
    if (this._isGameApi) {
      var args = Array.prototype.slice.call(arguments);
      args[0] = "POST";
      args[1] = "/api/game.php?path=" + encodeURIComponent(path);
      return this._xhr.open.apply(this._xhr, args);
    }
    return this._xhr.open.apply(this._xhr, arguments);
  };

  ["send", "abort", "setRequestHeader", "getResponseHeader", "getAllResponseHeaders", "addEventListener", "removeEventListener", "overrideMimeType"].forEach(function (name) {
    BridgeXHR.prototype[name] = function () {
      return this._xhr[name].apply(this._xhr, arguments);
    };
  });

  ["readyState", "response", "responseText", "responseType", "responseURL", "responseXML", "status", "statusText", "timeout", "upload", "withCredentials", "onreadystatechange", "onload", "onerror", "ontimeout", "onabort", "onprogress", "onloadend", "onloadstart"].forEach(function (name) {
    Object.defineProperty(BridgeXHR.prototype, name, {
      get: function () { return this._xhr[name]; },
      set: function (value) { this._xhr[name] = value; }
    });
  });

  window.XMLHttpRequest = BridgeXHR;
})();