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

using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using FakeItEasy;
using Squidex.Domain.Apps.Entities.Backup;
using Squidex.Domain.Apps.Entities.Rules.DomainObject;
using Squidex.Domain.Apps.Events.Rules;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Commands;
using Squidex.Infrastructure.EventSourcing;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Rules
{
    public class BackupRulesTests
    {
        private readonly CancellationTokenSource cts = new CancellationTokenSource();
        private readonly CancellationToken ct;
        private readonly Rebuilder rebuilder = A.Fake<Rebuilder>();
        private readonly NamedId<DomainId> appId = NamedId.Of(DomainId.NewGuid(), "my-app");
        private readonly BackupRules sut;

        public BackupRulesTests()
        {
            ct = cts.Token;

            sut = new BackupRules(rebuilder);
        }

        [Fact]
        public void Should_provide_name()
        {
            Assert.Equal("Rules", sut.Name);
        }

        [Fact]
        public async Task Should_restore_indices_for_all_non_deleted_rules()
        {
            var ruleId1 = DomainId.NewGuid();
            var ruleId2 = DomainId.NewGuid();
            var ruleId3 = DomainId.NewGuid();

            var context = new RestoreContext(appId.Id, new UserMapping(RefToken.User("123")), A.Fake<IBackupReader>(), DomainId.NewGuid());

            await sut.RestoreEventAsync(AppEvent(new RuleCreated
            {
                RuleId = ruleId1
            }), context, ct);

            await sut.RestoreEventAsync(AppEvent(new RuleCreated
            {
                RuleId = ruleId2
            }), context, ct);

            await sut.RestoreEventAsync(AppEvent(new RuleCreated
            {
                RuleId = ruleId3
            }), context, ct);

            await sut.RestoreEventAsync(AppEvent(new RuleDeleted
            {
                RuleId = ruleId3
            }), context, ct);

            var rebuildAssets = new HashSet<DomainId>();

            A.CallTo(() => rebuilder.InsertManyAsync<RuleDomainObject, RuleDomainObject.State>(A<IEnumerable<DomainId>>._, A<int>._, ct))
                .Invokes(x => rebuildAssets.AddRange(x.GetArgument<IEnumerable<DomainId>>(0)!));

            await sut.RestoreAsync(context, ct);

            Assert.Equal(new HashSet<DomainId>
            {
                DomainId.Combine(appId, ruleId1),
                DomainId.Combine(appId, ruleId2)
            }, rebuildAssets);
        }

        private Envelope<RuleEvent> AppEvent(RuleEvent @event)
        {
            @event.AppId = appId;

            return Envelope.Create(@event).SetAggregateId(DomainId.Combine(appId.Id, @event.RuleId));
        }
    }
}