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

using FakeItEasy;
using Squidex.Domain.Apps.Core.Subscriptions;
using Squidex.Domain.Apps.Events.Apps;
using Squidex.Infrastructure.EventSourcing;
using Squidex.Messaging.Subscriptions;
using Xunit;

namespace Squidex.Domain.Apps.Core.Operations.Subscriptions
{
    public class SubscriptionPublisherTests
    {
        private readonly ISubscriptionService subscriptionService = A.Fake<ISubscriptionService>();
        private readonly SubscriptionPublisher sut;

        private sealed class MyEvent : IEvent
        {
        }

        public SubscriptionPublisherTests()
        {
            sut = new SubscriptionPublisher(subscriptionService, Enumerable.Empty<ISubscriptionEventCreator>());
        }

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

            Assert.Equal("^(content-|asset-)", consumer.EventsFilter);
        }

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

            await consumer.ClearAsync();
        }

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

            Assert.Equal("Subscriptions", consumer.Name);
        }

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

            Assert.False(consumer.CanClear);
        }

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

            Assert.True(consumer.StartLatest);
        }

        [Theory]
        [InlineData(true)]
        [InlineData(false)]
        public void Should_handle_events_when_subscription_exists(bool hasSubscriptions)
        {
            A.CallTo(() => subscriptionService.HasSubscriptions)
                .Returns(hasSubscriptions);

            IEventConsumer consumer = sut;

            Assert.Equal(hasSubscriptions, consumer.Handles(null!));
        }

        [Fact]
        public async Task Should_not_publish_if_not_app_event()
        {
            var envelope = Envelope.Create(new MyEvent());

            await sut.On(envelope);

            A.CallTo(subscriptionService)
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_publish_app_event()
        {
            var envelope = Envelope.Create(new AppCreated());

            await sut.On(envelope);

            A.CallTo(subscriptionService).Where(x => x.Method.Name.StartsWith("Publish"))
                .MustHaveHappened();
        }
    }
}