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

/* exported testGenerator */
var testGenerator = testSteps();

function* testSteps() {
  const name = this.window ? window.location.pathname : "Splendid Test";
  const dbVersion = 10;

  let openRequest = indexedDB.open(name, dbVersion);
  openRequest.onerror = errorHandler;
  openRequest.onblocked = errorHandler;
  openRequest.onsuccess = unexpectedSuccessHandler;
  openRequest.onupgradeneeded = grabEventAndContinueHandler;

  let event = yield undefined;

  is(event.type, "upgradeneeded", "Expect an upgradeneeded event");
  ok(event instanceof IDBVersionChangeEvent, "Expect a versionchange event");

  let db = event.target.result;
  db.onversionchange = errorHandler;
  db.createObjectStore("stuff");

  openRequest.onsuccess = grabEventAndContinueHandler;

  event = yield undefined;

  is(event.type, "success", "Expect a success event");
  is(event.target, openRequest, "Event has right target");
  ok(event.target.result instanceof IDBDatabase, "Result should be a database");
  is(db.objectStoreNames.length, 1, "Expect an objectStore here");

  db.onversionchange = grabEventAndContinueHandler;
  let deletingRequest = indexedDB.deleteDatabase(name);
  deletingRequest.onerror = errorHandler;
  deletingRequest.onsuccess = errorHandler;
  deletingRequest.onblocked = errorHandler;

  event = yield undefined;

  is(event.type, "versionchange", "Expect an versionchange event");
  is(event.target, db, "Event has right target");
  ok(event instanceof IDBVersionChangeEvent, "Expect a versionchange event");
  is(event.oldVersion, dbVersion, "Correct old version");
  is(event.newVersion, null, "Correct new version");

  deletingRequest.onblocked = grabEventAndContinueHandler;

  event = yield undefined;

  is(event.type, "blocked", "Expect an blocked event");
  is(event.target, deletingRequest, "Event has right target");
  ok(event instanceof IDBVersionChangeEvent, "Expect a versionchange event");
  is(event.oldVersion, dbVersion, "Correct old version");
  is(event.newVersion, null, "Correct new version");

  // Bug-2006245 - Ensure indexedDB.databases() works as expected along with other IDBFactory
  // operations on other databases while deleteDatabase is blocked.
  // Also make sure that the databases() function are resolved in order and that's why we are
  // creating two such requests below.
  let databasePromise1Resolved = false;
  let databasesPromise1 = indexedDB.databases();
  databasesPromise1.then(
    () => {
      databasePromise1Resolved = true;
    },
    function (error) {
      ok(false, "databases() rejected: " + error);
      finishTest();
    }
  );

  let databasesPromise2 = indexedDB.databases();
  databasesPromise2.then(
    infos => {
      ok(
        databasePromise1Resolved,
        "databases() promises should be resolved in order"
      );
      grabEventAndContinueHandler(infos);
    },
    function (error) {
      ok(false, "databases() rejected: " + error);
      finishTest();
    }
  );

  let databaseInfos = yield undefined;

  ok(
    databaseInfos.some(info => info.name === name),
    "databases() should resolve while deleteDatabase is blocked"
  );

  const otherName = name + "-other";

  openRequest = indexedDB.open(otherName, 1);
  openRequest.onerror = errorHandler;
  openRequest.onblocked = errorHandler;
  openRequest.onsuccess = unexpectedSuccessHandler;
  openRequest.onupgradeneeded = grabEventAndContinueHandler;

  event = yield undefined;

  is(event.type, "upgradeneeded", "Expect an upgradeneeded event");
  ok(event instanceof IDBVersionChangeEvent, "Expect a versionchange event");

  let otherDb = event.target.result;
  otherDb.createObjectStore("stuff");

  openRequest.onsuccess = grabEventAndContinueHandler;

  event = yield undefined;

  is(event.type, "success", "Expect a success event");
  is(event.target, openRequest, "Event has right target");
  ok(event.target.result instanceof IDBDatabase, "Result should be a database");

  otherDb.close();

  deletingRequest.onsuccess = grabEventAndContinueHandler;
  db.close();

  event = yield undefined;

  is(event.type, "success", "expect a success event");
  is(event.target, deletingRequest, "event has right target");
  is(event.target.result, undefined, "event should have no result");

  openRequest = indexedDB.open(name, 1);
  openRequest.onerror = errorHandler;
  openRequest.onsuccess = grabEventAndContinueHandler;

  event = yield undefined;
  db = event.target.result;
  is(db.version, 1, "DB has proper version");
  is(db.objectStoreNames.length, 0, "DB should have no object stores");

  db.close();

  finishTest();
}