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

using FakeItEasy;
using Xunit;

namespace Squidex.Infrastructure.EventSourcing.Consume
{
    public class EventConsumerWorkerTests
    {
        private readonly IEventConsumer consumer1 = A.Fake<IEventConsumer>();
        private readonly IEventConsumer consumer2 = A.Fake<IEventConsumer>();
        private readonly EventConsumerProcessor processor1 = A.Fake<EventConsumerProcessor>();
        private readonly EventConsumerProcessor processor2 = A.Fake<EventConsumerProcessor>();
        private readonly EventConsumerWorker sut;

        public EventConsumerWorkerTests()
        {
            var factory = new Func<IEventConsumer, EventConsumerProcessor>(consumer =>
            {
                return consumer == consumer1 ? processor1 : processor2;
            });

            A.CallTo(() => consumer1.Name).Returns("1");
            A.CallTo(() => consumer2.Name).Returns("2");

            sut = new EventConsumerWorker(new[] { consumer1, consumer2 }, factory);
        }

        [Fact]
        public async Task Should_release_without_initialize()
        {
            await sut.ReleaseAsync(default);
        }

        [Fact]
        public async Task Should_initialize_all_processors_on_initialize()
        {
            await sut.InitializeAsync(default);

            A.CallTo(() => processor1.InitializeAsync(default))
                .MustHaveHappenedOnceExactly();

            A.CallTo(() => processor2.InitializeAsync(default))
                .MustHaveHappenedOnceExactly();
        }

        [Fact]
        public async Task Should_activate_all_processors_on_initialize()
        {
            await sut.InitializeAsync(default);

            A.CallTo(() => processor1.ActivateAsync())
                .MustHaveHappened();

            A.CallTo(() => processor2.ActivateAsync())
                .MustHaveHappened();
        }

        [Fact]
        public async Task Shoud_start_correct_processor()
        {
            await sut.HandleAsync(new EventConsumerStart(consumer1.Name), default);

            A.CallTo(() => processor1.StartAsync())
                .MustHaveHappened();

            A.CallTo(() => processor2.StartAsync())
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Shoud_stop_correct_processor()
        {
            await sut.HandleAsync(new EventConsumerStart(consumer1.Name), default);

            A.CallTo(() => processor1.StartAsync())
                .MustHaveHappened();

            A.CallTo(() => processor2.StartAsync())
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Shoud_reset_correct_processor()
        {
            await sut.HandleAsync(new EventConsumerReset(consumer1.Name), default);

            A.CallTo(() => processor1.ResetAsync())
                .MustHaveHappened();

            A.CallTo(() => processor2.ResetAsync())
                .MustNotHaveHappened();
        }
    }
}