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

using FakeItEasy;
using Squidex.Assets;
using Squidex.Domain.Apps.Entities.Apps.Commands;
using Squidex.Domain.Apps.Entities.TestHelpers;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Commands;
using Squidex.Infrastructure.Validation;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Apps.DomainObject
{
    public class AppCommandMiddlewareTests : HandlerTestBase<AppDomainObject.State>
    {
        private readonly IDomainObjectFactory domainObjectFactory = A.Fake<IDomainObjectFactory>();
        private readonly IContextProvider contextProvider = A.Fake<IContextProvider>();
        private readonly IAppImageStore appImageStore = A.Fake<IAppImageStore>();
        private readonly IAssetThumbnailGenerator assetThumbnailGenerator = A.Fake<IAssetThumbnailGenerator>();
        private readonly NamedId<DomainId> appId = NamedId.Of(DomainId.NewGuid(), "my-app");
        private readonly Context requestContext;
        private readonly AppCommandMiddleware sut;

        public sealed class MyCommand : SquidexCommand
        {
        }

        protected override DomainId Id
        {
            get => appId.Id;
        }

        public AppCommandMiddlewareTests()
        {
            requestContext = Context.Anonymous(Mocks.App(appId));

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

            sut = new AppCommandMiddleware(domainObjectFactory, appImageStore, assetThumbnailGenerator, contextProvider);
        }

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

            await HandleAsync(new UpdateApp(), actual);

            Assert.Same(actual, requestContext.App);
        }

        [Fact]
        public async Task Should_upload_image_to_store()
        {
            var file = new NoopAssetFile();

            A.CallTo(() => assetThumbnailGenerator.GetImageInfoAsync(A<Stream>._, file.MimeType, default))
                .Returns(new ImageInfo(100, 100, ImageOrientation.None, ImageFormat.PNG));

            await HandleAsync(new UploadAppImage { File = file }, None.Value);

            A.CallTo(() => appImageStore.UploadAsync(appId.Id, A<Stream>._, A<CancellationToken>._))
                .MustHaveHappened();
        }

        [Fact]
        public async Task Should_throw_exception_if_file_to_upload_is_not_an_image()
        {
            var file = new NoopAssetFile();

            var command = new UploadAppImage { File = file };

            A.CallTo(() => assetThumbnailGenerator.GetImageInfoAsync(A<Stream>._, file.MimeType, default))
                .Returns(Task.FromResult<ImageInfo?>(null));

            await Assert.ThrowsAsync<ValidationException>(() => HandleAsync(sut, command));
        }

        private Task<CommandContext> HandleAsync(AppCommand command, object actual)
        {
            command.AppId = appId;

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

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

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

            return HandleAsync(sut, command);
        }
    }
}