using System.Reflection;
using log4net;
using log4net.Repository.Hierarchy;
using Newtonsoft.Json;

namespace skyscraper8.Tests.NUnit;

[NonParallelizable]
public class SkyscrapersTestingFramework
{
    private static readonly ILog logger = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name);
    private Dictionary<string, DateTime> _testTimes;
    
    private VoileOnlineTestSessionMetadata _voileOnlineTestSessionMetadata;

    private VoileOnlineTestSessionMetadata GetVoileOnlineTestSessionMetadata()
    {
        if (_voileOnlineTestSessionMetadata == null)
        {
            _voileOnlineTestSessionMetadata = new VoileOnlineTestSessionMetadata();
            _voileOnlineTestSessionMetadata.Guid = Guid.NewGuid();
            _voileOnlineTestSessionMetadata.MachineName = Environment.MachineName;
            _voileOnlineTestSessionMetadata.StartTime = DateTime.Now;
            _voileOnlineTestSessionMetadata.OS = Environment.OSVersion.ToString();
            _voileOnlineTestSessionMetadata.ProductName = Assembly.GetExecutingAssembly().GetName().Name;
        }
        return _voileOnlineTestSessionMetadata;
    }

    private HashSet<long> testIds;
    private long ResolveTestId()
    {
        string testId = TestContext.CurrentContext.Test.ID;
        if (testIds == null)
            testIds = new HashSet<long>();

        long decodedTestId = 0;
        for (int i = 0; i < testId.Length; i++)
        {
            char current = testId[i];
            if (!char.IsDigit(current))
                continue;
            int currentDigit = current - '0';
            if (i != 0)
                decodedTestId *= 10;
            decodedTestId += currentDigit;
        }
        if (testIds.Contains(decodedTestId))
            throw new SkyscraperTestException("Test ID already used");
        testIds.Add(decodedTestId);
        return decodedTestId;
    }
    private long GetTestDuration()
    {
        if (_testTimes == null)
            return -1;
        
        string key = TestContext.CurrentContext.Test.FullName;
        if (!_testTimes.ContainsKey(key))
            return -2;

        return DateTime.Now.Subtract(_testTimes[key]).Milliseconds;
    }

    private DirectoryInfo _samplesDirectory;
    private DirectoryInfo GetSamplesDirectory()
    {
        if (_samplesDirectory == null)
        {
            FileInfo fi = new FileInfo("sample_path.txt");
            if (!fi.Exists)
            {
                logger.WarnFormat("Could not find {0}", fi.FullName);
            }
            else
            {
                logger.InfoFormat("Reading samples path from: {0}", fi.FullName);
                string readAllText = File.ReadAllText(fi.FullName).Trim();
                _samplesDirectory = new DirectoryInfo(readAllText);                
            }
            
            
        }

        if (_samplesDirectory == null)
        {
            Assert.Inconclusive("Could not find samples directory");
        }

        return _samplesDirectory;
    }
    
    protected FileStream GetStreamSample(string filename)
    {
        DirectoryInfo samplesDirectory = GetSamplesDirectory();
        FileInfo file = new FileInfo(Path.Combine(samplesDirectory.FullName, filename));
        if (!file.Exists)
        {
            Assert.Inconclusive(String.Format("Could not find sample file: {0}", file.FullName));           
        }
        return file.OpenRead();
    }
    
    [SetUp]
    public void Setup()
    {
        Console.WriteLine("Setup");
        if (_testTimes == null)
            _testTimes = new Dictionary<string, DateTime>();
        
        SetUpLogCapture();

        string key = TestContext.CurrentContext.Test.FullName;
        DateTime value = DateTime.Now;
        _testTimes[key] = value;
    }

    [TearDown]
    public void TearDown()
    {
        Console.WriteLine("TearDown");

        TestContext currentContext = TestContext.CurrentContext;
        
        VoileOnlineTestResult voileOnlineTestResult = new VoileOnlineTestResult();
        voileOnlineTestResult.ClassName = currentContext.Test.ClassName;
        voileOnlineTestResult.MethodName = currentContext.Test.MethodName;
        voileOnlineTestResult.OutcomeLabel = currentContext.Result.Outcome.Label;
        voileOnlineTestResult.OutcomeSite = (int)currentContext.Result.Outcome.Site;
        voileOnlineTestResult.OutcomeStatus = (int)currentContext.Result.Outcome.Status;
        voileOnlineTestResult.TimeTaken = GetTestDuration();
        voileOnlineTestResult.LogOutput = TearDownLogCapture();
        voileOnlineTestResult.AssertionCount = currentContext.AssertCount;
        voileOnlineTestResult.TestId = ResolveTestId();
        
        
        
        
        VoileOnlineTestPost voileOnlinePost = new VoileOnlineTestPost();
        voileOnlinePost.SessionMetadata = GetVoileOnlineTestSessionMetadata();
        voileOnlinePost.TestResult = voileOnlineTestResult;
        VoileOnlineUploader.Upload(voileOnlinePost);
    }
    
    public TException AssertTargetInvocation<TException>(TestDelegate action)
    where TException : Exception
    {
        TargetInvocationException exeption = Assert.Throws<TargetInvocationException>(action);
        
        Assert.That(exeption.InnerException, Is.TypeOf<TException>());
        
        return (TException)exeption.InnerException;   
    }

    private TestLog4NetAppender? _testLogAppender;

    protected TestLog4NetAppender TestLogAppender =>
        _testLogAppender ?? throw new InvalidOperationException("Test log appender is not initialized.");

    private void SetUpLogCapture()
    {
        Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();

        _testLogAppender = new TestLog4NetAppender
        {
            Name = $"TestLogAppender-{TestContext.CurrentContext.Test.ID}"
        };

        _testLogAppender.ActivateOptions();

        hierarchy.Root.AddAppender(_testLogAppender);

        if (hierarchy.Root.Level == null)
        {
            hierarchy.Root.Level = log4net.Core.Level.Debug;
        }

        hierarchy.Configured = true;
    }

    private string TearDownLogCapture()
    {
        string logText = _testLogAppender?.GetText() ?? string.Empty;

        if (!string.IsNullOrWhiteSpace(logText))
        {
            TestContext.WriteLine("Captured log4net output:");
            TestContext.WriteLine(logText);
        }

        if (_testLogAppender is not null)
        {
            Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();
            hierarchy.Root.RemoveAppender(_testLogAppender);
            _testLogAppender.Close();
            _testLogAppender = null;
        }

        return logText;
    }
}