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

using FakeItEasy;
using Squidex.Domain.Apps.Entities.Contents.Commands;
using Squidex.Domain.Apps.Entities.Contents.Queries;
using Squidex.Domain.Apps.Entities.TestHelpers;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Commands;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Contents.DomainObject
{
    public sealed class ContentCommandMiddlewareTests : HandlerTestBase<ContentDomainObject.State>
    {
        private readonly IDomainObjectCache domainObjectCache = A.Fake<IDomainObjectCache>();
        private readonly IDomainObjectFactory domainObjectFactory = A.Fake<IDomainObjectFactory>();
        private readonly IContentEnricher contentEnricher = A.Fake<IContentEnricher>();
        private readonly IContextProvider contextProvider = A.Fake<IContextProvider>();
        private readonly DomainId contentId = DomainId.NewGuid();
        private readonly Context requestContext;
        private readonly ContentCommandMiddleware sut;

        public sealed class MyCommand : SquidexCommand
        {
        }

        protected override DomainId Id
        {
            get => contentId;
        }

        public ContentCommandMiddlewareTests()
        {
            requestContext = Context.Anonymous(Mocks.App(AppNamedId));

            A.CallTo(() => contextProvider.Context)
                .Returns(requestContext);

            sut = new ContentCommandMiddleware(
                domainObjectFactory,
                domainObjectCache,
                contentEnricher,
                contextProvider);
        }

        [Fact]
        public async Task Should_not_invoke_enricher_for_other_actual()
        {
            await HandleAsync(new CreateContent(), 12);

            A.CallTo(() => contentEnricher.EnrichAsync(A<IEnrichedContentEntity>._, A<bool>._, requestContext, A<CancellationToken>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_not_invoke_enricher_if_already_enriched()
        {
            var actual = new ContentEntity();

            var context =
                await HandleAsync(new CreateContent(),
                    actual);

            Assert.Same(actual, context.Result<IEnrichedContentEntity>());

            A.CallTo(() => contentEnricher.EnrichAsync(A<IEnrichedContentEntity>._, A<bool>._, requestContext, A<CancellationToken>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_enrich_content_actual()
        {
            var actual = A.Fake<IContentEntity>();

            var enriched = new ContentEntity();

            A.CallTo(() => contentEnricher.EnrichAsync(actual, true, requestContext, A<CancellationToken>._))
                .Returns(enriched);

            var context =
                await HandleAsync(new CreateContent(),
                    actual);

            Assert.Same(enriched, context.Result<IEnrichedContentEntity>());
        }

        private Task<CommandContext> HandleAsync(ContentCommand command, object actual)
        {
            command.ContentId = contentId;

            CreateCommand(command);

            var domainObject = A.Fake<ContentDomainObject>();

            A.CallTo(() => domainObject.ExecuteAsync(A<IAggregateCommand>._, A<CancellationToken>._))
                .Returns(new CommandResult(command.AggregateId, 1, 0, actual));

            A.CallTo(() => domainObjectFactory.Create<ContentDomainObject>(command.AggregateId))
                .Returns(domainObject);

            return HandleAsync(sut, command);
        }
    }
}