/* 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/. */

var { XPCOMUtils } = ChromeUtils.importESModule("resource://gre/modules/XPCOMUtils.sys.mjs");

XPCOMUtils.defineLazyModuleGetters(this, {
  CalEvent: "resource:///modules/CalEvent.jsm",
});

add_setup(function () {
  // The deleted items service is started automatically by the start-up
  // procedure, but that doesn't happen in XPCShell tests. Add an observer
  // ourselves to simulate the behaviour.
  let delmgr = Cc["@mozilla.org/calendar/deleted-items-manager;1"].getService(Ci.calIDeletedItems);
  Services.obs.addObserver(delmgr, "profile-after-change");

  do_calendar_startup(run_next_test);
});

function check_delmgr_call(aFunc) {
  let delmgr = Cc["@mozilla.org/calendar/deleted-items-manager;1"].getService(Ci.calIDeletedItems);

  return new Promise((resolve, reject) => {
    delmgr.wrappedJSObject.completedNotifier.handleCompletion = aReason => {
      if (aReason == Ci.mozIStorageStatementCallback.REASON_FINISHED) {
        resolve();
      } else {
        reject(aReason);
      }
    };
    aFunc();
  });
}

add_task(async function test_deleted_items() {
  let delmgr = Cc["@mozilla.org/calendar/deleted-items-manager;1"].getService(Ci.calIDeletedItems);

  // No items have been deleted, retrieving one should return null.
  equal(delmgr.getDeletedDate("random"), null);
  equal(delmgr.getDeletedDate("random", "random"), null);

  // Make sure the cache is initially flushed and that this doesn't throw an
  // error.
  await check_delmgr_call(() => delmgr.flush());

  let memory = cal.manager.createCalendar("memory", Services.io.newURI("moz-storage-calendar://"));
  cal.manager.registerCalendar(memory);

  let item = new CalEvent();
  item.id = "test-item-1";
  item.startDate = cal.dtz.now();
  item.endDate = cal.dtz.now();

  // Add the item, it still shouldn't be in the deleted database.
  await check_delmgr_call(() => memory.addItem(item));
  equal(delmgr.getDeletedDate(item.id), null);
  equal(delmgr.getDeletedDate(item.id, memory.id), null);

  // We need to stop time so we have something to compare with.
  let referenceDate = cal.createDateTime("20120726T112045");
  referenceDate.timezone = cal.dtz.defaultTimezone;
  let futureDate = cal.createDateTime("20380101T000000");
  futureDate.timezone = cal.dtz.defaultTimezone;
  let useFutureDate = false;
  let oldNowFunction = cal.dtz.now;
  cal.dtz.now = function () {
    return (useFutureDate ? futureDate : referenceDate).clone();
  };

  // Deleting an item should trigger it being marked for deletion.
  await check_delmgr_call(() => memory.deleteItem(item));

  // Now check if it was deleted at our reference date.
  let deltime = delmgr.getDeletedDate(item.id);
  notEqual(deltime, null);
  equal(deltime.compare(referenceDate), 0);

  // The same with the calendar.
  deltime = delmgr.getDeletedDate(item.id, memory.id);
  notEqual(deltime, null);
  equal(deltime.compare(referenceDate), 0);

  // Item should not be found in other calendars.
  equal(delmgr.getDeletedDate(item.id, "random"), null);

  // Check if flushing works, we need to travel time for that.
  useFutureDate = true;
  await check_delmgr_call(() => delmgr.flush());
  equal(delmgr.getDeletedDate(item.id), null);
  equal(delmgr.getDeletedDate(item.id, memory.id), null);

  // Start over with our past time.
  useFutureDate = false;

  // Add, delete, add. Item should no longer be deleted.
  await check_delmgr_call(() => memory.addItem(item));
  equal(delmgr.getDeletedDate(item.id), null);
  await check_delmgr_call(() => memory.deleteItem(item));
  equal(delmgr.getDeletedDate(item.id).compare(referenceDate), 0);
  await check_delmgr_call(() => memory.addItem(item));
  equal(delmgr.getDeletedDate(item.id), null);

  // Revert now function, in case more tests are written.
  cal.dtz.now = oldNowFunction;
});