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

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

namespace Squidex.Domain.Apps.Entities.Rules.Indexes
{
    public class RulesCacheGrainTests
    {
        private readonly IRuleRepository ruleRepository = A.Fake<IRuleRepository>();
        private readonly DomainId appId = DomainId.NewGuid();
        private readonly RulesCacheGrain sut;

        public RulesCacheGrainTests()
        {
            sut = new RulesCacheGrain(ruleRepository);
            sut.ActivateAsync(appId.ToString()).Wait();
        }

        [Fact]
        public async Task Should_provide_rule_ids_from_repository_once()
        {
            var ids = new List<DomainId>
            {
                DomainId.NewGuid(),
                DomainId.NewGuid()
            };

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .Returns(ids);

            var result1 = await sut.GetRuleIdsAsync();
            var result2 = await sut.GetRuleIdsAsync();

            Assert.Equal(ids, result1);
            Assert.Equal(ids, result2);

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .MustHaveHappenedOnceExactly();
        }

        [Fact]
        public async Task Should_add_id_to_loaded_result()
        {
            var ids = new List<DomainId>
            {
                DomainId.NewGuid(),
                DomainId.NewGuid()
            };

            var newId = DomainId.NewGuid();

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .Returns(ids);

            await sut.GetRuleIdsAsync();
            await sut.AddAsync(newId);

            var result = await sut.GetRuleIdsAsync();

            Assert.Equal(ids.Union(Enumerable.Repeat(newId, 1)), result);

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .MustHaveHappenedOnceExactly();
        }

        [Fact]
        public async Task Should_remove_id_from_loaded_result()
        {
            var ids = new List<DomainId>
            {
                DomainId.NewGuid(),
                DomainId.NewGuid()
            };

            var newId = DomainId.NewGuid();

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .Returns(ids);

            await sut.GetRuleIdsAsync();
            await sut.RemoveAsync(ids[1]);

            var result = await sut.GetRuleIdsAsync();

            Assert.Equal(ids.Take(1), result);

            A.CallTo(() => ruleRepository.QueryIdsAsync(appId, default))
                .MustHaveHappenedOnceExactly();
        }
    }
}