// ==========================================================================.WriteAsync()
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using FakeItEasy;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Orleans;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Apps.Indexes
{
    public class AppsByUserIndexGrainTests
    {
        private readonly IGrainState<AppsByUserIndexGrain.GrainState> grainState = A.Fake<IGrainState<AppsByUserIndexGrain.GrainState>>();
        private readonly Guid appId1 = Guid.NewGuid();
        private readonly Guid appId2 = Guid.NewGuid();
        private readonly string userId = "user";
        private readonly AppsByUserIndexGrain sut;

        public AppsByUserIndexGrainTests()
        {
            sut = new AppsByUserIndexGrain(grainState);
            sut.ActivateAsync(userId).Wait();
        }

        [Fact]
        public async Task Should_add_app_id_to_index()
        {
            await sut.AddAppAsync(appId1);
            await sut.AddAppAsync(appId2);

            var result = await sut.GetAppIdsAsync();

            Assert.Equal(new List<Guid> { appId1, appId2 }, result);

            A.CallTo(() => grainState.WriteAsync())
                .MustHaveHappenedTwiceExactly();
        }

        [Fact]
        public async Task Should_remove_app_id_from_index()
        {
            await sut.AddAppAsync(appId1);
            await sut.AddAppAsync(appId2);
            await sut.RemoveAppAsync(appId1);

            var result = await sut.GetAppIdsAsync();

            Assert.Equal(new List<Guid> { appId2 }, result);

            A.CallTo(() => grainState.WriteAsync())
                .MustHaveHappenedTwiceOrMore();
        }

        [Fact]
        public async Task Should_replace_app_ids_on_rebuild()
        {
            var state = HashSet.Of(appId1, appId2);

            await sut.RebuildAsync(state);

            var result = await sut.GetAppIdsAsync();

            Assert.Equal(new List<Guid> { appId1, appId2 }, result);

            A.CallTo(() => grainState.WriteAsync())
                .MustHaveHappened();
        }
    }
}