using IW4MAdmin;
using IW4MAdmin.Application.Misc;
using SharedLibraryCore.Interfaces;
using Microsoft.Extensions.DependencyInjection;
using NUnit.Framework;
using FakeItEasy;
using System;
using ApplicationTests.Fixtures;
using SharedLibraryCore.Services;
using SharedLibraryCore.Database.Models;
using System.Threading.Tasks;
using ApplicationTests.Mocks;
using System.Linq;
using Microsoft.Extensions.Logging;
using SharedLibraryCore;
using SharedLibraryCore.Exceptions;
using SharedLibraryCore.Configuration;
using ILogger = Microsoft.Extensions.Logging.ILogger;

namespace ApplicationTests
{
    [TestFixture]
    public class IW4MServerTests
    {
        private IServiceProvider serviceProvider;
        private ILogger fakeLogger;
        private IManager fakeManager;
        private IRConConnection fakeRConConnection;
        private IRConParser fakeRConParser;
        private EventHandlerMock mockEventHandler;
        private ApplicationConfiguration appConfig;

        [SetUp]
        public void Setup()
        {
            serviceProvider = new ServiceCollection().BuildBase().BuildServiceProvider();

            fakeLogger = serviceProvider.GetRequiredService<ILogger>();
            fakeManager = serviceProvider.GetRequiredService<IManager>();
            fakeRConConnection = serviceProvider.GetRequiredService<IRConConnection>();
            fakeRConParser = serviceProvider.GetRequiredService<IRConParser>();
            mockEventHandler = serviceProvider.GetRequiredService<EventHandlerMock>();
            appConfig = serviceProvider.GetRequiredService<ApplicationConfiguration>();

            var rconConnectionFactory = serviceProvider.GetRequiredService<IRConConnectionFactory>();

            A.CallTo(() => rconConnectionFactory.CreateConnection(A<string>.Ignored, A<int>.Ignored, A<string>.Ignored))
                 .Returns(fakeRConConnection);

            A.CallTo(() => fakeRConParser.Configuration)
                .Returns(ConfigurationGenerators.CreateRConParserConfiguration(serviceProvider.GetRequiredService<IParserRegexFactory>()));

            A.CallTo(() => fakeManager.AddEvent(A<GameEvent>.Ignored))
                .Invokes((fakeCall) => mockEventHandler.HandleEvent(fakeManager, fakeCall.Arguments[0] as GameEvent));
            
        }

        #region LOG
        [Test]
        public void Test_GenerateLogPath_Basic()
        {
            string expected = "C:\\Game\\main\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_WithMod()
        {
            string expected = "C:\\Game\\mods\\mod\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main",
                ModDirectory = "mods\\mod",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_WithBaseGame()
        {
            string expected = "C:\\GameAlt\\main\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BaseGameDirectory = "C:\\GameAlt",
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_WithBaseGameAndMod()
        {
            string expected = "C:\\GameAlt\\mods\\mod\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BaseGameDirectory = "C:\\GameAlt",
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main",
                ModDirectory = "mods\\mod",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_InvalidBasePath()
        {
            string expected = "C:\\Game\\main\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BaseGameDirectory = "game",
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_BadSeparators()
        {
            string expected = "C:\\Game\\main\\folder\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BasePathDirectory = "C:/Game",
                GameDirectory = "main/folder",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_RelativeBasePath()
        {
            string expected = "C:\\Game\\main\\folder\\log.log";
            var info = new LogPathGeneratorInfo()
            {
                BaseGameDirectory = "main\\folder",
                BasePathDirectory = "C:\\Game",
                GameDirectory = "main\\folder",
                LogFile = "log.log"
            };
            string generated = IW4MServer.GenerateLogPath(info);

            Assert.AreEqual(expected, generated);
        }

        [Test]
        public void Test_GenerateLogPath_FixWineDriveMangling()
        {
            string expected = "/opt/server/game/log.log";
            var info = new LogPathGeneratorInfo()
            {
                BasePathDirectory = "Z:\\opt\\server",
                GameDirectory = "game",
                LogFile = "log.log",
                IsWindows = false
            };
            string generated = IW4MServer.GenerateLogPath(info).Replace('\\', '/');

            Assert.AreEqual(expected, generated);
        }
        #endregion

        #region BAN
        [Test]
        public async Task Test_BanCreatesPenalty()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Ban("test reason", target, origin);

            A.CallTo(() => fakePenaltyService.Create(A<EFPenalty>.Ignored))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_BanExecutesKickCommand()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Ban("test reason", target, origin);

            A.CallTo(() => fakeRConParser.ExecuteCommandAsync(fakeRConConnection, "kick"))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_BanQueuesSetLevelEvent()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Ban("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Type == SharedLibraryCore.GameEvent.EventType.ChangePermission &&
            _event.Origin == origin &&
            _event.Target == target &&
            (EFClient.Permission)_event.Extra == EFClient.Permission.Banned));
        }

        [Test]
        public async Task Test_BanFindsIngameClientToExecuteFor()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server, isIngame: false);
            var ingameTarget = ClientGenerators.CreateBasicClient(server);

            A.CallTo(() => fakeManager.GetActiveClients())
                .Returns(new[] { ingameTarget });

            await server.Ban("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Target == ingameTarget));
        }
        #endregion

        #region TEMPBAN
        [Test]
        public async Task Test_TempBanCreatesPenalty()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.TempBan("test reason", TimeSpan.Zero, target, origin);

            A.CallTo(() => fakePenaltyService.Create(A<EFPenalty>.Ignored))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_TempBanExecutesKickCommand()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.TempBan("test reason", TimeSpan.Zero, target, origin);

            A.CallTo(() => fakeRConParser.ExecuteCommandAsync(fakeRConConnection, "kick"))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_TempBanFindsIngameClientToExecuteFor()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server, isIngame: false);

            var ingameTarget = ClientGenerators.CreateBasicClient(server);

            A.CallTo(() => fakeManager.GetActiveClients())
                .Returns(new[] { ingameTarget });

            await server.TempBan("test reason", TimeSpan.Zero, target, origin);

            A.CallTo(() => fakeRConParser.ExecuteCommandAsync(fakeRConConnection, "kick"))
                .MustHaveHappenedOnceExactly();
        }
        #endregion

        #region KICK
        [Test]
        public async Task Test_KickCreatesPenalty()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Kick("test reason", target, origin);

            A.CallTo(() => fakePenaltyService.Create(A<EFPenalty>.Ignored))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_KickExecutesKickCommand()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Kick("test reason", target, origin);

            A.CallTo(() => fakeRConParser.ExecuteCommandAsync(fakeRConConnection, "kick"))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_KickQueuesPredisconnectEvent()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Kick("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Type == SharedLibraryCore.GameEvent.EventType.PreDisconnect && _event.Origin == target));
        }

        [Test]
        public async Task Test_KickFindsIngameClientToExecuteFor()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server, isIngame: false);

            var ingameTarget = ClientGenerators.CreateBasicClient(server);

            A.CallTo(() => fakeManager.GetActiveClients())
                .Returns(new[] { ingameTarget });

            await server.Kick("test reason", target, origin);

            // kick creates a pre disconnect event
            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Origin == ingameTarget));
        }
        #endregion

        #region WARN
        [Test]
        public async Task Test_WarnCreatesPenalty()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Warn("test reason", target, origin);

            A.CallTo(() => fakePenaltyService.Create(A<EFPenalty>.Ignored))
                .MustHaveHappenedOnceExactly();
        }

        [Test]
        public async Task Test_WarnBroadCastMessageForIngameClient()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);

            await server.Warn("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Type == SharedLibraryCore.GameEvent.EventType.Broadcast));
        }

        [Test]
        public async Task Test_WarnLimitReachedQueuesKickEvent()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var target = ClientGenerators.CreateBasicClient(server);
            var origin = ClientGenerators.CreateBasicClient(server);
            target.Warnings = 5;

            await server.Warn("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Type == SharedLibraryCore.GameEvent.EventType.Kick && _event.Target == target));
        }
        #endregion

        #region UNBAN
        [Test]
        public async Task Test_UnbanQueuesSetLevelEvent()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);
            A.CallTo(() => fakePenaltyService.RemoveActivePenalties(A<int>.Ignored))
                .Returns(Task.CompletedTask);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server);

            target.Level = EFClient.Permission.Banned;
            target.AliasLink = new EFAliasLink();

            await server.Unban("test reason", target, origin);

            Assert.IsTrue(mockEventHandler.Events.Any(_event => _event.Type == SharedLibraryCore.GameEvent.EventType.ChangePermission && _event.Target == target));
        }

        [Test]
        public async Task Test_UnbanRemovedActivePenalties()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);
            A.CallTo(() => fakePenaltyService.RemoveActivePenalties(A<int>.Ignored))
                .Returns(Task.CompletedTask);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server);

            target.Level = EFClient.Permission.Banned;
            target.AliasLink = new EFAliasLink()
            {
                AliasLinkId = 1
            };

            await server.Unban("test reason", target, origin);

            A.CallTo(() => fakePenaltyService.RemoveActivePenalties(target.AliasLink.AliasLinkId))
                .MustHaveHappened();
        }

        [Test]
        public async Task Test_UnbanCreatesPenalty()
        {
            var fakePenaltyService = A.Fake<PenaltyService>();
            A.CallTo(() => fakeManager.GetPenaltyService())
                .Returns(fakePenaltyService);
            A.CallTo(() => fakePenaltyService.RemoveActivePenalties(A<int>.Ignored))
                .Returns(Task.CompletedTask);

            var server = serviceProvider.GetRequiredService<IW4MServer>();
            var origin = ClientGenerators.CreateBasicClient(server);
            var target = ClientGenerators.CreateBasicClient(server);

            target.Level = EFClient.Permission.Banned;
            target.AliasLink = new EFAliasLink()
            {
                AliasLinkId = 1
            };

            await server.Unban("test reason", target, origin);

            A.CallTo(() => fakePenaltyService.Create(A<EFPenalty>.Ignored))
                .MustHaveHappened();
        }
        #endregion

        [Test]
        public async Task Test_ConnectionLostNotificationDisabled()
        {
            var server = serviceProvider.GetService<IW4MServer>();
            var fakeConfigHandler = A.Fake<IConfigurationHandler<ApplicationConfiguration>>();
            appConfig.IgnoreServerConnectionLost = true;

            A.CallTo(() => fakeRConParser.GetStatusAsync(A<IRConConnection>.Ignored))
                .ThrowsAsync(new NetworkException("err"));

            // simulate failed connection attempts
            for (int i = 0; i < 5; i++)
            {
                await server.ProcessUpdatesAsync(new System.Threading.CancellationToken());
            }
        }

        [Test]
        public async Task Test_ConnectionLostNotificationEnabled()
        {
            var server = serviceProvider.GetService<IW4MServer>();
            var fakeConfigHandler = A.Fake<IConfigurationHandler<ApplicationConfiguration>>();

            A.CallTo(() => fakeRConParser.GetStatusAsync(A<IRConConnection>.Ignored))
                .ThrowsAsync(new NetworkException("err"));

            // simulate failed connection attempts
            for (int i = 0; i < 5; i++)
            {
                await server.ProcessUpdatesAsync(new System.Threading.CancellationToken());
            }

            // execute the connection lost event
            foreach(var e in mockEventHandler.Events.ToList())
            {
                await server.ExecuteEvent(e);
            }

            Assert.IsNotEmpty(mockEventHandler.Events.Where(_event => _event.Type == GameEvent.EventType.ConnectionLost));
            Assert.AreEqual("err", (mockEventHandler.Events[0].Extra as NetworkException).Message);
        }
    }
}