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

using FakeItEasy;
using NodaTime;
using Squidex.Domain.Apps.Entities.Rules.Repositories;
using Squidex.Domain.Apps.Entities.TestHelpers;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Caching;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Rules.Queries
{
    public class RuleEnricherTests
    {
        private readonly CancellationTokenSource cts = new CancellationTokenSource();
        private readonly CancellationToken ct;
        private readonly IRuleEventRepository ruleEventRepository = A.Fake<IRuleEventRepository>();
        private readonly IRequestCache requestCache = A.Fake<IRequestCache>();
        private readonly NamedId<DomainId> appId = NamedId.Of(DomainId.NewGuid(), "my-app");
        private readonly Context requestContext;
        private readonly RuleEnricher sut;

        public RuleEnricherTests()
        {
            ct = cts.Token;

            requestContext = Context.Anonymous(Mocks.App(appId));

            sut = new RuleEnricher(ruleEventRepository, requestCache);
        }

        [Fact]
        public async Task Should_not_enrich_if_statistics_not_found()
        {
            var source = CreateRule();

            var actual = await sut.EnrichAsync(source, requestContext, ct);

            Assert.Equal(0, actual.NumFailed);
            Assert.Equal(0, actual.NumSucceeded);

            Assert.Null(actual.LastExecuted);

            A.CallTo(() => requestCache.AddDependency(source.UniqueId, source.Version))
                .MustHaveHappened();

            A.CallTo(() => requestCache.AddDependency<Instant?>(null))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_enrich_rules_with_found_statistics()
        {
            var source = CreateRule();

            var stats = new RuleStatistics
            {
                RuleId = source.Id,
                NumFailed = 12,
                NumSucceeded = 17,
                LastExecuted = SystemClock.Instance.GetCurrentInstant()
            };

            A.CallTo(() => ruleEventRepository.QueryStatisticsByAppAsync(appId.Id, ct))
                .Returns(new List<RuleStatistics> { stats });

            await sut.EnrichAsync(source, requestContext, ct);

            A.CallTo(() => requestCache.AddDependency(source.UniqueId, source.Version))
                .MustHaveHappened();

            A.CallTo(() => requestCache.AddDependency(stats.LastExecuted))
                .MustHaveHappened();
        }

        private IRuleEntity CreateRule()
        {
            return new RuleEntity { AppId = appId, Id = DomainId.NewGuid(), Version = 13 };
        }
    }
}