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

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

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

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.IsAny<string>()))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(2 , result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));
            Assert.IsTrue(result.Any(x => x.User.Id == userId2));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_ResetErrorCount_Test()
        {
            #region Stubs
            var userId1 = 1;

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    FetchingErrorCount = 100
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.IsAny<string>()))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));
            Assert.AreEqual(0, result.First().User.FetchingErrorCount);

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Unfound_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Throws(new UserNotFoundException());

            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            removeTwitterAccountActionMock
                .Setup(x => x.ProcessAsync(It.Is<SyncTwitterUser>(y => y.Acct == acct2)))
                .Returns(Task.CompletedTask);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Suspended_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Throws(new UserHasBeenSuspendedException());

            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            removeTwitterAccountActionMock
                .Setup(x => x.ProcessAsync(It.Is<SyncTwitterUser>(y => y.Acct == acct2)))
                .Returns(Task.CompletedTask);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Exception_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Throws(new Exception());
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 0
                });

            twitterUserDalMock
                .Setup(x => x.UpdateTwitterUserAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2 && y.FetchingErrorCount == 1)))
                .Returns(Task.CompletedTask);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Error_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Returns((TwitterUser)null);
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 0
                });

            twitterUserDalMock
                .Setup(x => x.UpdateTwitterUserAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2 && y.FetchingErrorCount == 1)))
                .Returns(Task.CompletedTask);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Error_OverThreshold_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Returns((TwitterUser)null);
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 500
                });

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            removeTwitterAccountActionMock
                .Setup(x => x.ProcessAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2)))
                .Returns(Task.CompletedTask);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Protected_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Returns(new TwitterUser
                {
                    Protected = true
                });
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 0
                });

            twitterUserDalMock
                .Setup(x => x.UpdateTwitterUserAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2 && y.FetchingErrorCount == 1)))
                .Returns(Task.CompletedTask);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_Protected_OverThreshold_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Returns(new TwitterUser
                {
                    Protected = true
                });
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 500
                });

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            removeTwitterAccountActionMock
                .Setup(x => x.ProcessAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2)))
                .Returns(Task.CompletedTask);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }
        
        [TestMethod]
        public async Task ProcessAsync_Error_NotInit_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";
            
            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1,
                    LastSync = default,
                    LastTweetPostedId = -1,
                    LastTweetSynchronizedForAllFollowersId = -1
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns((TwitterUser)null);
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct1)))
                .ReturnsAsync(users.First());

            twitterUserDalMock
                .Setup(x => x.UpdateTwitterUserAsync(
                    It.Is<SyncTwitterUser>(y => y.Id == userId1 && y.FetchingErrorCount == 1 && y.LastSync != default)))
                .Returns(Task.CompletedTask);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(0, result.Length);

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }

        [TestMethod]
        public async Task ProcessAsync_RateLimited_Test()
        {
            #region Stubs
            var userId1 = 1;
            var acct1 = "user1";

            var userId2 = 2;
            var acct2 = "user2";

            var users = new List<SyncTwitterUser>
            {
                new SyncTwitterUser
                {
                    Id = userId1,
                    Acct = acct1
                },
                new SyncTwitterUser
                {
                    Id = userId2,
                    Acct = acct2
                }
            };

            var settings = new InstanceSettings
            {
                FailingTwitterUserCleanUpThreshold = 300
            };
            #endregion

            #region Mocks
            var twitterUserServiceMock = new Mock<ICachedTwitterUserService>(MockBehavior.Strict);
            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct1)))
                .Returns(new TwitterUser
                {
                    Protected = false,
                });

            twitterUserServiceMock
                .Setup(x => x.GetUser(It.Is<string>(y => y == acct2)))
                .Throws(new RateLimitExceededException());
            
            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
            twitterUserDalMock
                .Setup(x => x.GetTwitterUserAsync(It.Is<string>(y => y == acct2)))
                .ReturnsAsync(new SyncTwitterUser
                {
                    Id = userId2,
                    FetchingErrorCount = 20
                });

            twitterUserDalMock
                .Setup(x => x.UpdateTwitterUserAsync(It.Is<SyncTwitterUser>(y => y.Id == userId2 && y.FetchingErrorCount == 20)))
                .Returns(Task.CompletedTask);

            var removeTwitterAccountActionMock = new Mock<IRemoveTwitterAccountAction>(MockBehavior.Strict);
            #endregion

            var processor = new RefreshTwitterUserStatusProcessor(twitterUserServiceMock.Object, twitterUserDalMock.Object, removeTwitterAccountActionMock.Object, settings);
            var result = await processor.ProcessAsync(users.ToArray(), CancellationToken.None);

            #region Validations
            Assert.AreEqual(1, result.Length);
            Assert.IsTrue(result.Any(x => x.User.Id == userId1));

            twitterUserServiceMock.VerifyAll();
            twitterUserDalMock.VerifyAll();
            removeTwitterAccountActionMock.VerifyAll();
            #endregion
        }
    }
}