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

using System.Linq;
using System.Threading.Tasks;
using FakeItEasy;
using Squidex.Domain.Apps.Core.HandleRules;
using Squidex.Domain.Apps.Core.Rules;
using Squidex.Domain.Apps.Core.Rules.EnrichedEvents;
using Squidex.Domain.Apps.Core.Rules.Triggers;
using Squidex.Domain.Apps.Events;
using Squidex.Domain.Apps.Events.Contents;
using Squidex.Infrastructure;
using Squidex.Infrastructure.EventSourcing;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Rules.UsageTracking
{
    public class UsageTriggerHandlerTests
    {
        private readonly IRuleTriggerHandler sut = new UsageTriggerHandler();

        [Fact]
        public void Should_return_false_if_asking_for_snapshot_support()
        {
            Assert.False(sut.CanCreateSnapshotEvents);
        }

        [Fact]
        public void Should_handle_usage_event()
        {
            Assert.True(sut.Handles(new AppUsageExceeded()));
        }

        [Fact]
        public void Should_not_handle_other_event()
        {
            Assert.False(sut.Handles(new ContentCreated()));
        }

        [Fact]
        public async Task Should_create_enriched_event()
        {
            var ctx = Context();

            var @event = new AppUsageExceeded { CallsCurrent = 80, CallsLimit = 120 };

            var result = await sut.CreateEnrichedEventsAsync(Envelope.Create<AppEvent>(@event), ctx, default).ToListAsync();

            var enrichedEvent = result.Single() as EnrichedUsageExceededEvent;

            Assert.Equal(@event.CallsCurrent, enrichedEvent!.CallsCurrent);
            Assert.Equal(@event.CallsLimit, enrichedEvent!.CallsLimit);
        }

        [Fact]
        public void Should_not_trigger_precheck_if_rule_id_not_matchs()
        {
            var ctx = Context();

            var @event = new AppUsageExceeded();

            var result = sut.Trigger(Envelope.Create<AppEvent>(@event), ctx);

            Assert.True(result);
        }

        [Fact]
        public void Should_trigger_precheck_if_event_type_correct_and_rule_id_matchs()
        {
            var ctx = Context();

            var @event = new AppUsageExceeded { RuleId = ctx.RuleId };

            var result = sut.Trigger(Envelope.Create<AppEvent>(@event), ctx);

            Assert.True(result);
        }

        private static RuleContext Context(RuleTrigger? trigger = null)
        {
            trigger ??= new UsageTrigger();

            return new RuleContext
            {
                AppId = NamedId.Of(DomainId.NewGuid(), "my-app"),
                Rule = new Rule(trigger, A.Fake<RuleAction>()),
                RuleId = DomainId.NewGuid()
            };
        }
    }
}