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

using FakeItEasy;
using Orleans;
using Squidex.Domain.Apps.Entities.Apps.DomainObject;
using Squidex.Domain.Apps.Entities.TestHelpers;
using Squidex.Domain.Apps.Events.Apps;
using Squidex.Infrastructure;
using Squidex.Infrastructure.EventSourcing;
using Squidex.Infrastructure.Reflection;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Apps
{
    public class AppPermanentDeleterTests
    {
        private readonly IGrainFactory grainFactory = A.Fake<IGrainFactory>();
        private readonly IDeleter deleter1 = A.Fake<IDeleter>();
        private readonly IDeleter deleter2 = A.Fake<IDeleter>();
        private readonly TypeNameRegistry typeNameRegistry;
        private readonly AppPermanentDeleter sut;

        public AppPermanentDeleterTests()
        {
            typeNameRegistry =
                new TypeNameRegistry()
                    .Map(typeof(AppCreated))
                    .Map(typeof(AppContributorRemoved))
                    .Map(typeof(AppDeleted));

            sut = new AppPermanentDeleter(new[] { deleter1, deleter2 }, grainFactory, typeNameRegistry);
        }

        [Fact]
        public void Should_return_assets_filter_for_events_filter()
        {
            IEventConsumer consumer = sut;

            Assert.Equal("^app-", consumer.EventsFilter);
        }

        [Fact]
        public async Task Should_do_nothing_on_clear()
        {
            IEventConsumer consumer = sut;

            await consumer.ClearAsync();
        }

        [Fact]
        public void Should_return_type_name_for_name()
        {
            IEventConsumer consumer = sut;

            Assert.Equal(nameof(AppPermanentDeleter), consumer.Name);
        }

        [Fact]
        public void Should_handle_delete_event()
        {
            var storedEvent =
                new StoredEvent("stream", "1", 1,
                    new EventData(typeNameRegistry.GetName<AppDeleted>(), new EnvelopeHeaders(), "payload"));

            Assert.True(sut.Handles(storedEvent));
        }

        [Fact]
        public void Should_handle_contributor_event()
        {
            var storedEvent =
                new StoredEvent("stream", "1", 1,
                    new EventData(typeNameRegistry.GetName<AppContributorRemoved>(), new EnvelopeHeaders(), "payload"));

            Assert.True(sut.Handles(storedEvent));
        }

        [Fact]
        public void Should_not_handle_creation_event()
        {
            var storedEvent =
                new StoredEvent("stream", "1", 1,
                    new EventData(typeNameRegistry.GetName<AppCreated>(), new EnvelopeHeaders(), "payload"));

            Assert.False(sut.Handles(storedEvent));
        }

        [Fact]
        public async Task Should_call_deleters_when_contributor_removed()
        {
            var app = Mocks.App(NamedId.Of(DomainId.NewGuid(), "my-app"));

            await sut.On(Envelope.Create(new AppContributorRemoved
            {
                AppId = app.NamedId(),
                ContributorId = "user1"
            }));

            A.CallTo(() => deleter1.DeleteContributorAsync(app.Id, "user1", default))
                .MustHaveHappened();

            A.CallTo(() => deleter2.DeleteContributorAsync(app.Id, "user1", default))
                .MustHaveHappened();
        }

        [Fact]
        public async Task Should_call_deleters_when_app_deleted()
        {
            var app = Mocks.App(NamedId.Of(DomainId.NewGuid(), "my-app"));

            var grain = A.Fake<IAppGrain>();

            A.CallTo(() => grain.GetStateAsync())
                .Returns(app);

            A.CallTo(() => grainFactory.GetGrain<IAppGrain>(app.Id.ToString(), null))
                .Returns(grain);

            await sut.On(Envelope.Create(new AppDeleted
            {
                AppId = app.NamedId()
            }));

            A.CallTo(() => deleter1.DeleteAppAsync(app, default))
                .MustHaveHappened();

            A.CallTo(() => deleter2.DeleteAppAsync(app, default))
                .MustHaveHappened();
        }
    }
}