/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

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

XPCOMUtils.defineLazyModuleGetter(this, "Experiments",
  "resource:///modules/experiments/Experiments.jsm");

const MANIFEST_HANDLER         = "manifests/handler";

const SEC_IN_ONE_DAY  = 24 * 60 * 60;
const MS_IN_ONE_DAY   = SEC_IN_ONE_DAY * 1000;

var gHttpServer          = null;
var gHttpRoot            = null;
var gDataRoot            = null;
var gPolicy              = null;
var gManifestObject      = null;
var gManifestHandlerURI  = null;

add_task(async function test_setup() {
  loadAddonManager();

  gHttpServer = new HttpServer();
  gHttpServer.start(-1);
  let port = gHttpServer.identity.primaryPort;
  gHttpRoot = "http://localhost:" + port + "/";
  gDataRoot = gHttpRoot + "data/";
  gManifestHandlerURI = gHttpRoot + MANIFEST_HANDLER;
  gHttpServer.registerDirectory("/data/", do_get_cwd());
  gHttpServer.registerPathHandler("/" + MANIFEST_HANDLER, (request, response) => {
    response.setStatusLine(null, 200, "OK");
    response.write(JSON.stringify(gManifestObject));
    response.processAsync();
    response.finish();
  });
  do_register_cleanup(() => gHttpServer.stop(() => {}));

  Services.prefs.setBoolPref(PREF_EXPERIMENTS_ENABLED, true);
  Services.prefs.setIntPref(PREF_LOGGING_LEVEL, 0);
  Services.prefs.setBoolPref(PREF_LOGGING_DUMP, true);
  Services.prefs.setCharPref(PREF_MANIFEST_URI, gManifestHandlerURI);
  Services.prefs.setIntPref(PREF_FETCHINTERVAL, 0);

  gPolicy = new Experiments.Policy();
  patchPolicy(gPolicy, {
    updatechannel: () => "nightly",
    oneshotTimer: (callback, timeout, thisObj, name) => {},
  });
});

// Test disabling the feature stops current and future experiments.

add_task(async function test_disableExperiments() {
  const OBSERVER_TOPIC = "experiments-changed";
  let observerFireCount = 0;
  let expectedObserverFireCount = 0;
  let observer = () => ++observerFireCount;
  Services.obs.addObserver(observer, OBSERVER_TOPIC);

  // Dates the following tests are based on.

  let baseDate   = new Date(2014, 5, 1, 12);
  let startDate1 = futureDate(baseDate, 50 * MS_IN_ONE_DAY);
  let endDate1   = futureDate(baseDate, 100 * MS_IN_ONE_DAY);
  let startDate2 = futureDate(baseDate, 150 * MS_IN_ONE_DAY);
  let endDate2   = futureDate(baseDate, 200 * MS_IN_ONE_DAY);

  // The manifest data we test with.

  gManifestObject = {
    "version": 1,
    experiments: [
      {
        id:               EXPERIMENT2_ID,
        xpiURL:           gDataRoot + EXPERIMENT2_XPI_NAME,
        xpiHash:          EXPERIMENT2_XPI_SHA1,
        startTime:        dateToSeconds(startDate2),
        endTime:          dateToSeconds(endDate2),
        maxActiveSeconds: 10 * SEC_IN_ONE_DAY,
        appName:          ["XPCShell"],
        channel:          ["nightly"],
      },
      {
        id:               EXPERIMENT1_ID,
        xpiURL:           gDataRoot + EXPERIMENT1_XPI_NAME,
        xpiHash:          EXPERIMENT1_XPI_SHA1,
        startTime:        dateToSeconds(startDate1),
        endTime:          dateToSeconds(endDate1),
        maxActiveSeconds: 10 * SEC_IN_ONE_DAY,
        appName:          ["XPCShell"],
        channel:          ["nightly"],
      },
    ],
  };

  let experiments = new Experiments.Experiments(gPolicy);

  // Trigger update, clock set to before any activation.
  // Use updateManifest() to provide for coverage of that path.

  let now = baseDate;
  defineNow(gPolicy, now);

  await experiments.updateManifest();
  Assert.equal(observerFireCount, ++expectedObserverFireCount,
               "Experiments observer should have been called.");
  let list = await experiments.getExperiments();
  Assert.equal(list.length, 0, "Experiment list should be empty.");
  let addons = await getExperimentAddons();
  Assert.equal(addons.length, 0, "Precondition: No experiment add-ons are installed.");

  // Trigger update, clock set for experiment 1 to start.

  now = futureDate(startDate1, 5 * MS_IN_ONE_DAY);
  defineNow(gPolicy, now);

  await experiments.updateManifest();
  Assert.equal(observerFireCount, ++expectedObserverFireCount,
               "Experiments observer should have been called.");

  list = await experiments.getExperiments();
  Assert.equal(list.length, 1, "Experiment list should have 1 entry now.");
  Assert.equal(list[0].active, true, "Experiment should be active.");
  addons = await getExperimentAddons();
  Assert.equal(addons.length, 1, "An experiment add-on was installed.");

  // Disable the experiments feature. Check that we stop the running experiment.

  Services.prefs.setBoolPref(PREF_EXPERIMENTS_ENABLED, false);
  await experiments._mainTask;

  Assert.equal(observerFireCount, ++expectedObserverFireCount,
               "Experiments observer should have been called.");

  list = await experiments.getExperiments();
  Assert.equal(list.length, 1, "Experiment list should have 1 entry.");
  Assert.equal(list[0].active, false, "Experiment entry should not be active.");
  addons = await getExperimentAddons();
  Assert.equal(addons.length, 0, "The experiment add-on should be uninstalled.");

  // Trigger update, clock set for experiment 2 to start. Verify we don't start it.

  now = startDate2;
  defineNow(gPolicy, now);

  try {
    await experiments.updateManifest();
  } catch (e) {
    // This exception is expected, we rethrow everything else
    if (e.message != "experiments are disabled") {
      throw e;
    }
  }

  experiments.notify();
  await experiments._mainTask;

  Assert.equal(observerFireCount, expectedObserverFireCount,
               "Experiments observer should not have been called.");

  list = await experiments.getExperiments();
  Assert.equal(list.length, 1, "Experiment list should still have 1 entry.");
  Assert.equal(list[0].active, false, "Experiment entry should not be active.");
  addons = await getExperimentAddons();
  Assert.equal(addons.length, 0, "There should still be no experiment add-on installed.");

  // Cleanup.

  Services.obs.removeObserver(observer, OBSERVER_TOPIC);
  await promiseRestartManager();
  await removeCacheFile();
});
