using System;

using System.Collections.Generic;

using System.Linq;

using EventStore;

using EventStore.Serialization;

using Ncqrs.Eventing.Storage.JOliver.SqlPersistence;

using NUnit.Framework;

using FluentAssertions;



namespace Ncqrs.Eventing.Storage.JOliver.Tests

{

    [TestFixture]

    public class AbsoluteOrderingSqlPersistenceEngineTests

    {

        private IPersistStreamsWithAbsoluteOrdering _sut;



        [Test]

        public void Pipeline_state_is_persisted()

        {

            string pipelineName = Guid.NewGuid().ToString();

            var emptyState = _sut.GetLastProcessedSequentialNumber(pipelineName);



            emptyState.Should().Be(0);

            var headers = new Dictionary<string, object>();

            var commit = new Commit(Guid.NewGuid(), 1, Guid.NewGuid(), 1, DateTime.UtcNow, headers, new List<EventMessage>(){new EventMessage()});

            _sut.Commit(commit);

            _sut.MarkLastProcessed(pipelineName, commit.StreamId, commit.CommitId);

            var setState = _sut.GetLastProcessedSequentialNumber(pipelineName);

            setState.Should().NotBe(0);

        }



        [Test]

        public void Fetching_from_given_id_should_return_commit_with_given_id_and_newer()

        {

            var streamId = Guid.NewGuid();

            var firstCommit = streamId.BuildAttempt();

            var secondCommit = firstCommit.BuildNextAttempt();

            var thirdCommit = secondCommit.BuildNextAttempt();



            _sut.Commit(firstCommit);

            _sut.Commit(secondCommit);

            _sut.Commit(thirdCommit);



            var all = _sut.Fetch(0,100).ToList();

            var second = all[all.Count-2];

            second.CommitId.Should().Be(secondCommit.CommitId);



            var secondAndLater = _sut.Fetch((long)second.Headers["SequentialId"],100).ToList();

            secondAndLater.Count.Should().Be(2);

            second = secondAndLater[0];

            second.CommitId.Should().Be(secondCommit.CommitId);

        }



        [SetUp]

        public void Initialize()

        {

            var factory = new AbsoluteOrderingSqlPersistenceFactory("EventStore", new BinarySerializer(), false);

            _sut = (IPersistStreamsWithAbsoluteOrdering)factory.Build();

            _sut.Initialize();

        }

    }



}