/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* General MAR File Download Tests */

Components.utils.import("resource://testing-common/MockRegistrar.jsm");
const INC_CONTRACT_ID = "@mozilla.org/network/incremental-download;1";

// gIncrementalDownloadErrorType is used to loop through each of the connection
// error types in the Mock incremental downloader.
var gIncrementalDownloadErrorType = 0;

var gNextRunFunc;
var gExpectedStatusResult;

function run_test() {
  setupTestCommon();

  debugDump("testing mar downloads, mar hash verification, and " +
            "mar download interrupted recovery");

  Services.prefs.setBoolPref(PREF_APP_UPDATE_STAGING_ENABLED, false);
  // The HTTP server is only used for the mar file downloads since it is slow
  start_httpserver();
  setUpdateURLOverride(gURLData + "update.xml");
  // The mock XMLHttpRequest is MUCH faster
  overrideXHR(callHandleEvent);
  standardInit();
  do_execute_soon(run_test_pt1);
}

// The HttpServer must be stopped before calling do_test_finished
function finish_test() {
  stop_httpserver(doTestFinish);
}

// Callback function used by the custom XMLHttpRequest implementation to
// call the nsIDOMEventListener's handleEvent method for onload.
function callHandleEvent(aXHR) {
  aXHR.status = 400;
  aXHR.responseText = gResponseBody;
  try {
    let parser = Cc["@mozilla.org/xmlextras/domparser;1"].
                 createInstance(Ci.nsIDOMParser);
    aXHR.responseXML = parser.parseFromString(gResponseBody, "application/xml");
  } catch (e) {
  }
  let e = { target: aXHR };
  aXHR.onload(e);
}

// Helper function for testing mar downloads that have the correct size
// specified in the update xml.
function run_test_helper_pt1(aMsg, aExpectedStatusResult, aNextRunFunc) {
  gUpdates = null;
  gUpdateCount = null;
  gStatusResult = null;
  gCheckFunc = check_test_helper_pt1_1;
  gNextRunFunc = aNextRunFunc;
  gExpectedStatusResult = aExpectedStatusResult;
  debugDump(aMsg, Components.stack.caller);
  gUpdateChecker.checkForUpdates(updateCheckListener, true);
}

function check_test_helper_pt1_1() {
  Assert.equal(gUpdateCount, 1,
               "the update count" + MSG_SHOULD_EQUAL);
  gCheckFunc = check_test_helper_pt1_2;
  let bestUpdate = gAUS.selectUpdate(gUpdates, gUpdateCount);
  let state = gAUS.downloadUpdate(bestUpdate, false);
  if (state == STATE_NONE || state == STATE_FAILED) {
    do_throw("nsIApplicationUpdateService:downloadUpdate returned " + state);
  }
  gAUS.addDownloadListener(downloadListener);
}

function check_test_helper_pt1_2() {
  Assert.equal(gStatusResult, gExpectedStatusResult,
               "the download status result" + MSG_SHOULD_EQUAL);
  gAUS.removeDownloadListener(downloadListener);
  gNextRunFunc();
}

function setResponseBody(aHashFunction, aHashValue, aSize) {
  let patches = getRemotePatchString(null, null,
                                     aHashFunction, aHashValue, aSize);
  let updates = getRemoteUpdateString(patches);
  gResponseBody = getRemoteUpdatesXMLString(updates);
}

function initMockIncrementalDownload() {
  let incrementalDownloadCID =
    MockRegistrar.register(INC_CONTRACT_ID, IncrementalDownload);
  do_register_cleanup(() => {
    MockRegistrar.unregister(incrementalDownloadCID);
  });
}

/* This Mock incremental downloader is used to verify that connection
 * interrupts work correctly in updater code.  The implementation of
 * the mock incremental downloader is very simple, it simply copies
 * the file to the destination location.
 */

function IncrementalDownload() {
  this.wrappedJSObject = this;
}

IncrementalDownload.prototype = {
  /* nsIIncrementalDownload */
  init: function(uri, file, chunkSize, intervalInSeconds) {
    this._destination = file;
    this._URI = uri;
    this._finalURI = uri;
  },

  start: function(observer, ctxt) {
    let tm = Cc["@mozilla.org/thread-manager;1"].
             getService(Ci.nsIThreadManager);
    // Do the actual operation async to give a chance for observers
    // to add themselves.
    tm.mainThread.dispatch(function() {
        this._observer = observer.QueryInterface(Ci.nsIRequestObserver);
        this._ctxt = ctxt;
        this._observer.onStartRequest(this, this._ctxt);
        let mar = getTestDirFile(FILE_SIMPLE_MAR);
        mar.copyTo(this._destination.parent, this._destination.leafName);
        let status = Cr.NS_OK
        switch (gIncrementalDownloadErrorType++) {
          case 0:
            status = Cr.NS_ERROR_NET_RESET;
            break;
          case 1:
            status = Cr.NS_ERROR_CONNECTION_REFUSED;
            break;
          case 2:
            status = Cr.NS_ERROR_NET_RESET;
            break;
          case 3:
            status = Cr.NS_OK;
            break;
          case 4:
            status = Cr.NS_ERROR_OFFLINE;
            // After we report offline, we want to eventually show offline
            // status being changed to online.
            let tm = Cc["@mozilla.org/thread-manager;1"].
                     getService(Ci.nsIThreadManager);
            tm.mainThread.dispatch(function() {
              Services.obs.notifyObservers(gAUS,
                                           "network:offline-status-changed",
                                           "online");
            }, Ci.nsIThread.DISPATCH_NORMAL);
            break;
        }
        this._observer.onStopRequest(this, this._ctxt, status);
      }.bind(this), Ci.nsIThread.DISPATCH_NORMAL);
  },

  get URI() {
    return this._URI;
  },

  get currentSize() {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },

  get destination() {
    return this._destination;
  },

  get finalURI() {
    return this._finalURI;
  },

  get totalSize() {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },

  /* nsIRequest */
  cancel: function(aStatus) {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
  suspend: function() {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
  isPending: function() {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
  _loadFlags: 0,
  get loadFlags() {
    return this._loadFlags;
  },
  set loadFlags(val) {
    this._loadFlags = val;
  },

  _loadGroup: null,
  get loadGroup() {
    return this._loadGroup;
  },
  set loadGroup(val) {
    this._loadGroup = val;
  },

  _name: "",
  get name() {
    return this._name;
  },

  _status: 0,
  get status() {
    return this._status;
  },
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIIncrementalDownload])
};

// Test disconnecting during an update
function run_test_pt1() {
  initMockIncrementalDownload();
  setResponseBody("MD5", MD5_HASH_SIMPLE_MAR);
  run_test_helper_pt1("mar download with connection interruption",
                      Cr.NS_OK, run_test_pt2);
}

// Test disconnecting during an update
function run_test_pt2() {
  gIncrementalDownloadErrorType = 0;
  Services.prefs.setIntPref(PREF_APP_UPDATE_SOCKET_MAXERRORS, 2);
  Services.prefs.setIntPref(PREF_APP_UPDATE_RETRYTIMEOUT, 0);
  setResponseBody("MD5", MD5_HASH_SIMPLE_MAR);

  let expectedResult;
  if (IS_TOOLKIT_GONK) {
    // Gonk treats interrupted downloads differently. For gonk, if the state
    // is pending, this means that the download has completed and only the
    // staging needs to occur. So gonk will skip the download portion which
    // results in an NS_OK return.
    expectedResult = Cr.NS_OK;
  } else {
    expectedResult = Cr.NS_ERROR_NET_RESET;
  }
  run_test_helper_pt1("mar download with connection interruption without recovery",
                      expectedResult, run_test_pt3);
}

// Test entering offline mode while downloading
function run_test_pt3() {
  gIncrementalDownloadErrorType = 4;
  setResponseBody("MD5", MD5_HASH_SIMPLE_MAR);
  run_test_helper_pt1("mar download with offline mode",
                      Cr.NS_OK, finish_test);
}
