const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
const Cr = Components.results;

Cu.import("resource://testing-common/httpd.js");

var httpserv = null;

const CID = Components.ID("{5645d2c1-d6d8-4091-b117-fe7ee4027db7}");
const contractID = "@mozilla.org/system-proxy-settings;1"

var systemSettings = {
  QueryInterface: function (iid) {
    if (iid.equals(Components.interfaces.nsISupports) ||
        iid.equals(Components.interfaces.nsIFactory) ||
        iid.equals(Components.interfaces.nsISystemProxySettings))
      return this;
    throw Components.results.NS_ERROR_NO_INTERFACE;
  },
  createInstance: function (outer, iid) {
    if (outer)
      throw Components.results.NS_ERROR_NO_AGGREGATION;
    return this.QueryInterface(iid);
  },
  lockFactory: function (lock) {
    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
  },
  
  PACURI: "http://localhost:4444/redirect",
  getProxyForURI: function(aURI) {
    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
  }
};

function checkValue(request, data, ctx) {
  do_check_true(called);
  do_check_eq("ok", data);
  httpserv.stop(do_test_finished);
}

function makeChan(url) {
  var ios = Components.classes["@mozilla.org/network/io-service;1"]
                      .getService(Components.interfaces.nsIIOService);
  var chan = ios.newChannel(url, null, null)
                .QueryInterface(Components.interfaces.nsIHttpChannel);

  return chan;
}

function run_test() {
  httpserv = new HttpServer();
  httpserv.registerPathHandler("/redirect", redirect);
  httpserv.registerPathHandler("/pac", pac);
  httpserv.registerPathHandler("/target", target);
  httpserv.start(4444);

  Components.manager.nsIComponentRegistrar.registerFactory(
    CID,
    "Fake system proxy-settings",
    contractID, systemSettings);

  // Ensure we're using system-properties
  const prefs = Cc["@mozilla.org/preferences-service;1"]
                   .getService(Ci.nsIPrefBranch);
  prefs.setIntPref(
    "network.proxy.type",
    Components.interfaces.nsIProtocolProxyService.PROXYCONFIG_SYSTEM);

  // clear cache
  evict_cache_entries();

  var chan = makeChan("http://localhost:4444/target");
  chan.asyncOpen(new ChannelListener(checkValue, null), null);

  do_test_pending();
}

var called = false, failed = false;
function redirect(metadata, response) {
  // If called second time, just return the PAC but set failed-flag
  if (called) {
      failed = true;
      return pac(metadata, response);
   }
  
  called = true;
  response.setStatusLine(metadata.httpVersion, 302, "Found");
  response.setHeader("Location", "/pac", false);
  var body = "Moved\n";
  response.bodyOutputStream.write(body, body.length);
}

function pac(metadata, response) {
  var PAC = 'function FindProxyForURL(url, host) { return "DIRECT"; }';
  response.setStatusLine(metadata.httpVersion, 200, "Ok");
  response.setHeader("Content-Type", "application/x-ns-proxy-autoconfig", false);
  response.bodyOutputStream.write(PAC, PAC.length);
}

function target(metadata, response) {
  var retval = "ok";
  if (failed) retval = "failed";

  response.setStatusLine(metadata.httpVersion, 200, "Ok");
  response.setHeader("Content-Type", "text/plain", false);
  response.bodyOutputStream.write(retval, retval.length);
}
