// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

library syncbase_database_test;

import 'dart:convert' show UTF8;

import 'package:test/test.dart';

import 'package:ether/syncbase_client.dart'
    show SyncbaseClient, WatchChangeTypes, WatchChange;

import './utils.dart' as utils;

runDatabaseTests(SyncbaseClient c) {
  test('getting a handle to a database', () {
    var app = c.app(utils.uniqueName('app'));
    var dbName = utils.uniqueName('db');
    var db = app.noSqlDatabase(dbName);
    expect(db.name, equals(dbName));
    expect(db.fullName, equals(app.fullName + '/' + dbName));
  });

  test('creating and destroying a database', () async {
    var app = c.app(utils.uniqueName('app'));
    await app.create(utils.emptyPerms());

    var db = app.noSqlDatabase(utils.uniqueName('db'));

    expect(await db.exists(), equals(false));
    await db.create(utils.emptyPerms());
    expect(await db.exists(), equals(true));
    await db.destroy();
    expect(await db.exists(), equals(false));
  });

  test('basic watch', () async {
    var app = c.app(utils.uniqueName('app'));
    await app.create(utils.emptyPerms());
    var db = app.noSqlDatabase(utils.uniqueName('db'));
    await db.create(utils.emptyPerms());
    var table = db.table(utils.uniqueName('table'));
    await table.create(utils.emptyPerms());

    // Perform some operations that we won't be watching.
    await table.put('row1', UTF8.encode('value1'));
    await table.delete('row1');

    // Start watching everything from now.
    var resumeMarker = await db.getResumeMarker();
    var prefix = '';
    var watchStream = db.watch(table.name, prefix, resumeMarker);

    // Perform some operations while are watching.
    var expectedChanges = new List<WatchChange>();

    await table.put('row2', UTF8.encode('value2'));
    resumeMarker = await db.getResumeMarker();
    var expectedChange = SyncbaseClient.watchChange(
        tableName: table.name,
        rowName: 'row2',
        changeType: WatchChangeTypes.put,
        valueBytes: UTF8.encode('value2'),
        resumeMarker: resumeMarker);
    expectedChanges.add(expectedChange);

    await table.delete('row2');
    resumeMarker = await db.getResumeMarker();
    expectedChange = SyncbaseClient.watchChange(
        tableName: table.name,
        rowName: 'row2',
        changeType: WatchChangeTypes.delete,
        resumeMarker: resumeMarker);
    expectedChanges.add(expectedChange);

    // Ensure we see all the expected changes in order in the watch stream.
    var changeNum = 0;
    await for (var change in watchStream) {
      // Classes generated by mojom Dart compiler do not override == and hashCode
      // but they do override toString to print all properties. So we use toString
      // to assert equality.
      expect(change.toString(), equals(expectedChanges[changeNum].toString()));
      changeNum++;
      // We need to break out of awaiting for watch stream values when we get everything we expected.
      // because watch stream does not end until canceled by design and we don't have canceling mechanism yet.
      if (changeNum == expectedChanges.length) {
        break;
      }
    }
  });

  // TODO(nlacasse): Test database.get/setPermissions.
}