using System;

using System.Collections.Generic;

using System.Linq;

using FluentAssertions;

using Ncqrs.Eventing;

using Ncqrs.Eventing.Sourcing;

using Xunit;

using Ncqrs.Eventing.Storage;



namespace Ncqrs.Tests.Eventing.Storage

{

    

    public class InMemoryEventStoreSpecs

    {        

        public class SomethingDoneEvent

        {

        }



        [Fact]

        public void When_getting_all_event_from_a_non_existing_event_source_the_result_should_be_empty()

        {

            var eventSourceId = Guid.NewGuid();

            var store = new InMemoryEventStore();



            var events = store.ReadFrom(eventSourceId, long.MinValue, long.MaxValue);



            events.Should().NotBeNull();

            events.Should().BeEmpty();

        }



        [Fact]

        public void When_getting_all_event_from_an_existing_event_source_the_result_should_be_all_events_stored_for_that_event_source()

        {

            var eventSourceId = Guid.NewGuid();



            var stream1 = new UncommittedEventStream(Guid.NewGuid());

            stream1.Append(new UncommittedEvent(Guid.NewGuid(), eventSourceId, 1, 0, DateTime.UtcNow, new object(), new Version(1, 0)));

            stream1.Append(new UncommittedEvent(Guid.NewGuid(), eventSourceId, 2, 0, DateTime.UtcNow, new object(), new Version(1, 0)));



            var stream2 = new UncommittedEventStream(Guid.NewGuid());

            stream2.Append(new UncommittedEvent(Guid.NewGuid(), eventSourceId, 3, 1, DateTime.UtcNow, new object(), new Version(1, 0)));

            stream2.Append(new UncommittedEvent(Guid.NewGuid(), eventSourceId, 4, 1, DateTime.UtcNow, new object(), new Version(1, 0)));

            stream2.Append(new UncommittedEvent(Guid.NewGuid(), eventSourceId, 5, 1, DateTime.UtcNow, new object(), new Version(1, 0)));



            var store = new InMemoryEventStore();



            store.Store(stream1);

            store.Store(stream2);



            var events = store.ReadFrom(eventSourceId, long.MinValue, long.MaxValue);



            events.Count().Should().Be(5);

        }

    }

}