using Microsoft.Extensions.Configuration;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Phares.Shared;
using Serilog;
using System.Diagnostics;
using System.Drawing.Imaging;
using System.Reflection;
using View_by_Distance.FaceRecognitionDotNet;
using View_by_Distance.Metadata.Models;
using View_by_Distance.Resize.Models;
using View_by_Distance.Shared.Models;
using View_by_Distance.Shared.Models.Stateless;
using View_by_Distance.Shared.Models.Stateless.Methods;
using View_by_Distance.Tests.Models;

namespace View_by_Distance.Tests;

[TestClass]
public class UnitTestFace
{

    private readonly ILogger _Logger;
    private readonly AppSettings _AppSettings;
    private readonly string _WorkingDirectory;
    private readonly Configuration _Configuration;
    private readonly IsEnvironment _IsEnvironment;
    private readonly IConfigurationRoot _ConfigurationRoot;
    private readonly Property.Models.Configuration _PropertyConfiguration;

    public UnitTestFace()
    {
        ILogger logger;
        AppSettings appSettings;
        string workingDirectory;
        Configuration configuration;
        IsEnvironment isEnvironment;
        IConfigurationRoot configurationRoot;
        LoggerConfiguration loggerConfiguration = new();
        Property.Models.Configuration propertyConfiguration;
        Assembly assembly = Assembly.GetExecutingAssembly();
        bool debuggerWasAttachedAtLineZero = Debugger.IsAttached || assembly.Location.Contains(@"\bin\Debug");
        isEnvironment = new(processesCount: null, nullASPNetCoreEnvironmentIsDevelopment: debuggerWasAttachedAtLineZero, nullASPNetCoreEnvironmentIsProduction: !debuggerWasAttachedAtLineZero);
        IConfigurationBuilder configurationBuilder = new ConfigurationBuilder()
            .AddEnvironmentVariables()
            .AddJsonFile(isEnvironment.AppSettingsFileName);
        configurationRoot = configurationBuilder.Build();
        appSettings = Models.Binder.AppSettings.Get(configurationRoot);
        workingDirectory = IWorkingDirectory.GetWorkingDirectory(assembly.GetName().Name, appSettings.WorkingDirectoryName);
        Environment.SetEnvironmentVariable(nameof(workingDirectory), workingDirectory);
        _ = ConfigurationLoggerConfigurationExtensions.Configuration(loggerConfiguration.ReadFrom, configurationRoot);
        Log.Logger = loggerConfiguration.CreateLogger();
        logger = Log.ForContext<UnitTestFace>();
        propertyConfiguration = Property.Models.Binder.Configuration.Get(isEnvironment, configurationRoot);
        configuration = Models.Binder.Configuration.Get(isEnvironment, configurationRoot, propertyConfiguration);
        logger.Information("Complete");
        _Logger = logger;
        _AppSettings = appSettings;
        _Configuration = configuration;
        _IsEnvironment = isEnvironment;
        _WorkingDirectory = workingDirectory;
        _ConfigurationRoot = configurationRoot;
        _PropertyConfiguration = propertyConfiguration;
    }

    [TestMethod]
    public void TestConfiguration()
    {
        if (_Configuration.LocationDigits != Shared.Models.Stateless.ILocation.Digits)
            throw new Exception("Configuration has to match interface!");
        if (_Configuration.LocationFactor != Shared.Models.Stateless.ILocation.Factor)
            throw new Exception("Configuration has to match interface!");
    }

    [TestMethod]
    public void TestMethodNull()
    {
        Assert.IsFalse(_Logger is null);
        Assert.IsFalse(_AppSettings is null);
        Assert.IsFalse(_Configuration is null);
        Assert.IsFalse(_IsEnvironment is null);
        Assert.IsFalse(_WorkingDirectory is null);
        Assert.IsFalse(_ConfigurationRoot is null);
        Assert.IsFalse(_PropertyConfiguration is null);
    }

    private Property.Models.A_Property GetPropertyLogic(bool reverse, Model? model, PredictorModel? predictorModel)
    {
        Property.Models.A_Property result;
        if (_Configuration?.PropertyConfiguration is null)
            throw new NullReferenceException(nameof(_Configuration.PropertyConfiguration));
        result = new(_AppSettings.MaxDegreeOfParallelism, _Configuration.PropertyConfiguration, _Configuration.OutputExtension, reverse, model, predictorModel);
        return result;
    }

    private static (Model model, PredictorModel predictorModel, ModelParameter modelParameter) GetModel(Configuration configuration)
    {
        (Model, PredictorModel, ModelParameter) result;
        Array array;
        Model? model = null;
        PredictorModel? predictorModel = null;
        array = Enum.GetValues(typeof(Model));
        foreach (Model check in array)
        {
            if (configuration.ModelName.Contains(check.ToString()))
            {
                model = check;
                break;
            }
        }
        if (model is null)
            throw new Exception("Destination directory must have Model name!");
        model = model.Value;
        array = Enum.GetValues(typeof(PredictorModel));
        foreach (PredictorModel check in array)
        {
            if (configuration.PredictorModelName.Contains(check.ToString()))
            {
                predictorModel = check;
                break;
            }
        }
        if (predictorModel is null)
            throw new Exception("Destination directory must have Predictor Model name!");
        predictorModel = predictorModel.Value;
        ModelParameter modelParameter = new()
        {
            CnnFaceDetectorModel = File.ReadAllBytes(Path.Combine(configuration.ModelDirectory, "mmod_human_face_detector.dat")),
            FaceRecognitionModel = File.ReadAllBytes(Path.Combine(configuration.ModelDirectory, "dlib_face_recognition_resnet_model_v1.dat")),
            PosePredictor5FaceLandmarksModel = File.ReadAllBytes(Path.Combine(configuration.ModelDirectory, "shape_predictor_5_face_landmarks.dat")),
            PosePredictor68FaceLandmarksModel = File.ReadAllBytes(Path.Combine(configuration.ModelDirectory, "shape_predictor_68_face_landmarks.dat"))
        };
        result = new(model.Value, predictorModel.Value, modelParameter);
        return result;
    }

    [TestMethod]
    public void TestMethodRoundB()
    {
        const int DistanceDigits = 3;
        const int DistanceFactor = 1000;
        const int ToleranceAfterFactor = 600;
        Assert.IsTrue(DistanceDigits == 3);
        Assert.IsTrue(DistanceFactor == 1000);
        Assert.IsTrue(_Configuration.FaceDistanceTolerance == 0.6d);
        Assert.IsTrue(ToleranceAfterFactor == 600);
        double valueA = 0.00001d;
        int checkA = (int)(Math.Round(valueA, _Configuration.LocationDigits) * _Configuration.LocationFactor);
        Assert.IsTrue(checkA == 10);
        double valueB = 0.01d;
        int checkB = (int)(Math.Round(valueB, _Configuration.LocationDigits) * _Configuration.LocationFactor);
        Assert.IsTrue(checkB == 10000);
        Assert.IsTrue(checkB > checkA);
        int checkC = (int)(_Configuration.FaceDistanceTolerance * DistanceFactor);
        Assert.IsTrue(checkC == ToleranceAfterFactor);
    }

    [TestMethod]
    public void TestMethodFace()
    {
        // string sourceFileName = "IMG_0067.jpg";
        // string sourceDirectoryName = "Mackenzie Prom 2017";
        // string sourceFileName = "Fall 2005 (113).jpg";
        // string sourceDirectoryName = "=2005.3 Fall";
        // string sourceFileName = "DSCN0534.jpg";
        // string sourceDirectoryName = "Logan Swimming Lessons 2013";
        // string sourceFileName = "DSC_4913.jpg";
        // string sourceDirectoryName = "Disneyland 2014";
        // string sourceFileName = "Logan Michael Sept 08 (193).jpg";
        // string sourceDirectoryName = "=2008.2 Summer Logan Michael";
        string sourceFileName = "Halloween 2006 (112).jpg";
        string sourceDirectoryName = "Halloween 2006";
        Item item;
        bool reverse = false;
        string original = "Original";
        string aResultsFullGroupDirectory;
        string bResultsFullGroupDirectory;
        string cResultsFullGroupDirectory;
        List<string> parseExceptions = new();
        bool isValidImageFormatExtension = true;
        Shared.Models.Property? property = null;
        Dictionary<string, int[]> imageResizeKeyValuePairs;
        List<Tuple<string, DateTime>> subFileTuples = new();
        List<KeyValuePair<string, string>> metadataCollection;
        int length = _PropertyConfiguration.RootDirectory.Length;
        string outputResolution = _Configuration.OutputResolutions[0];
        (Model model, PredictorModel predictorModel, ModelParameter modelParameter) = GetModel(_Configuration);
        Property.Models.A_Property propertyLogic = GetPropertyLogic(reverse, model, predictorModel);
        string sourceDirectory = Path.Combine(_PropertyConfiguration.RootDirectory, sourceDirectoryName);
        _Logger.Information(_Configuration.ModelDirectory);
        aResultsFullGroupDirectory = Property.Models.Stateless.IResult.GetResultsFullGroupDirectory(
            _PropertyConfiguration, model, predictorModel, nameof(Property.Models.A_Property), outputResolution, includeResizeGroup: false, includeModel: false, includePredictorModel: false);
        bResultsFullGroupDirectory = Property.Models.Stateless.IResult.GetResultsFullGroupDirectory(
            _PropertyConfiguration, model, predictorModel, nameof(B_Metadata), outputResolution, includeResizeGroup: false, includeModel: false, includePredictorModel: false);
        cResultsFullGroupDirectory = Property.Models.Stateless.IResult.GetResultsFullGroupDirectory(
            _PropertyConfiguration, model, predictorModel, nameof(C_Resize), outputResolution, includeResizeGroup: true, includeModel: false, includePredictorModel: false);
        string aPropertySingletonDirectory = Property.Models.Stateless.IResult.GetResultsDateGroupDirectory(_PropertyConfiguration, nameof(Property.Models.A_Property), "{}");
        B_Metadata metadata = new(_Configuration.ForceMetadataLastWriteTimeToCreationTime, _Configuration.PropertiesChangedForMetadata);
        _ = metadata.ToString();
        (ImageCodecInfo imageCodecInfo, EncoderParameters encoderParameters, string filenameExtension) = C_Resize.GetTuple(_Configuration.OutputExtension, _Configuration.OutputQuality);
        C_Resize resize = new(_Configuration.ForceResizeLastWriteTimeToCreationTime, _Configuration.OverrideForResizeImages, _Configuration.PropertiesChangedForResize, _Configuration.ValidResolutions, imageCodecInfo, encoderParameters, filenameExtension);
        _ = resize.ToString();
        propertyLogic.AngleBracketCollection.AddRange(Property.Models.Stateless.IResult.GetDirectoryInfoCollection(
            _PropertyConfiguration,
            sourceDirectory,
            aResultsFullGroupDirectory,
            contentDescription: string.Empty,
            singletonDescription: "Properties for each image",
            collectionDescription: string.Empty,
            converted: false));
        metadata.AngleBracketCollection.AddRange(Property.Models.Stateless.IResult.GetDirectoryInfoCollection(
            _PropertyConfiguration,
            sourceDirectory,
            bResultsFullGroupDirectory,
            contentDescription: string.Empty,
            singletonDescription: "Metadata as key value pairs",
            collectionDescription: string.Empty,
            converted: true));
        resize.AngleBracketCollection.AddRange(Property.Models.Stateless.IResult.GetDirectoryInfoCollection(
            _PropertyConfiguration,
            sourceDirectory,
            cResultsFullGroupDirectory,
            contentDescription: "Resized image",
            singletonDescription: "Resize dimensions for each resolution",
            collectionDescription: string.Empty,
            converted: true));
        string sourceDirectoryFile = ".json";
        FileHolder fileHolder = new(Path.Combine(sourceDirectory, sourceFileName));
        string relativePath = IPath.GetRelativePath(fileHolder.FullName, length);
        sourceDirectory = Path.Combine(aPropertySingletonDirectory, sourceDirectoryName);
        item = new(sourceDirectoryFile, relativePath, fileHolder, isValidImageFormatExtension, property, false, false);
        Assert.IsNotNull(item.ImageFileHolder);
        if (item.Property is null)
        {
            property = propertyLogic.GetProperty(item, subFileTuples, parseExceptions);
            item.Update(property);
        }
        (int _, metadataCollection) = metadata.GetMetadataCollection(_Configuration.PropertyConfiguration, bResultsFullGroupDirectory, subFileTuples, parseExceptions, item);
        imageResizeKeyValuePairs = resize.GetResizeKeyValuePairs(_Configuration.PropertyConfiguration, cResultsFullGroupDirectory, subFileTuples, parseExceptions, original, metadataCollection, item);
        Assert.IsNotNull(item.ResizedFileHolder);
        resize.SaveResizedSubfile(outputResolution, cResultsFullGroupDirectory, subFileTuples, item, original, imageResizeKeyValuePairs);
        Image image = FaceRecognition.LoadImageFile(item.ResizedFileHolder.FullName);
        Assert.IsNotNull(image);
        FaceRecognition faceRecognition = new(_Configuration.NumberOfTimesToUpsample, _Configuration.NumberOfJitters, predictorModel, model, modelParameter);
        List<(Location Location, FaceRecognitionDotNet.FaceEncoding? FaceEncoding, Dictionary<FacePart, FacePoint[]>? FaceParts)> collection;
        collection = faceRecognition.GetCollection(image, includeFaceEncoding: true, includeFaceParts: true);
        Assert.IsTrue(collection.Count == 2);
        List<FaceDistance> faceDistanceEncodings = (from l in collection where l.FaceEncoding is not null select new FaceDistance(l.FaceEncoding)).ToList();
        List<FaceDistance> faceDistanceLengths = FaceRecognition.FaceDistances(faceDistanceEncodings, faceDistanceEncodings[0]);
        Assert.IsTrue(faceDistanceLengths.Count == 2);
        Assert.IsNotNull(sourceFileName);
    }

}