using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using BirdsiteLive.DAL.Contracts;
using BirdsiteLive.DAL.Models;
using BirdsiteLive.Pipeline.Models;
using BirdsiteLive.Pipeline.Processors;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;

namespace BirdsiteLive.Pipeline.Tests.Processors
{
    [TestClass]
    public class RetrieveFollowersProcessorTests
    {
        [TestMethod]
        public async Task ProcessAsync_Test()
        {
            #region Stubs
            var userId1 = 1;
            var userId2 = 2;

            var users = new List<UserWithTweetsToSync>
            {
                new UserWithTweetsToSync
                {
                    User = new SyncTwitterUser
                    {
                        Id = userId1
                    }
                },
                new UserWithTweetsToSync
                {
                    User = new SyncTwitterUser
                    {
                        Id = userId2
                    }
                }
            };

            var followersUser1 = new List<Follower>
            {
                new Follower(),
                new Follower(),
            };
            var followersUser2 = new List<Follower>
            {
                new Follower(),
                new Follower(),
                new Follower(),
            };
            #endregion

            #region Mocks
            var followersDalMock = new Mock<IFollowersDal>(MockBehavior.Strict);
            followersDalMock
                .Setup(x => x.GetFollowersAsync(It.Is<int>(y => y == userId1)))
                .ReturnsAsync(followersUser1.ToArray());

            followersDalMock
                .Setup(x => x.GetFollowersAsync(It.Is<int>(y => y == userId2)))
                .ReturnsAsync(followersUser2.ToArray());
            #endregion

            var processor = new RetrieveFollowersProcessor(followersDalMock.Object);
            var result = (await processor.ProcessAsync(users.ToArray(), CancellationToken.None)).ToList();

            #region Validations
            Assert.IsNotNull(result);
            Assert.AreEqual(2, result.Count);
            Assert.AreEqual(2, result.First(x => x.User.Id == userId1).Followers.Length);
            Assert.AreEqual(3, result.First(x => x.User.Id == userId2).Followers.Length);

            followersDalMock.VerifyAll();
            #endregion
        }
    }
}