using Microsoft.Extensions.Logging;
using ShellProgressBar;
using System.Collections.ObjectModel;
using View_by_Distance.Compare.Models;
using View_by_Distance.Distance.Models.Stateless;
using View_by_Distance.Face.Models.Stateless;
using View_by_Distance.Metadata.Models;
using View_by_Distance.People.Models.Stateless;
using View_by_Distance.Shared.Models;
using View_by_Distance.Shared.Models.Stateless;

namespace View_by_Distance.Compare;

public partial class Compare : ICompare, IDisposable
{

    private ProgressBar? _ProgressBar;
    private readonly ProgressBarOptions _ProgressBarOptions;

    public Compare(List<string> args, ILogger<Program>? logger, AppSettings appSettings, bool isSilent, IConsole console)
    {
        if (isSilent)
        { }
        if (args is null)
            throw new NullReferenceException(nameof(args));
        if (console is null)
            throw new NullReferenceException(nameof(console));
        ICompare compare = this;
        long ticks = DateTime.Now.Ticks;
        _ProgressBarOptions = new() { ProgressCharacter = '─', ProgressBarOnBottom = true, DisableBottomPercentage = true };
        CompareWork(logger, appSettings, compare, ticks);
    }

    void ICompare.Tick() =>
        _ProgressBar?.Tick();

    void ICompare.ConstructProgressBar(int maxTicks, string message)
    {
        _ProgressBar?.Dispose();
        _ProgressBar = new(maxTicks, message, _ProgressBarOptions);
    }

    void IDisposable.Dispose()
    {
        _ProgressBar?.Dispose();
        GC.SuppressFinalize(this);
    }

    private static bool GetRunToDoCollectionFirst(AppSettings appSettings, long ticks)
    {
        bool result = appSettings.DistanceSettings.SaveSortingWithoutPerson;
        if (!result)
            result = !IId.IsOffsetDeterministicHashCode(appSettings.MetadataSettings);
        if (!result)
        {
            string[] directories;
            directories = Directory.GetDirectories(appSettings.ResultSettings.RootDirectory, "*", SearchOption.TopDirectoryOnly);
            if (directories.Length == 0)
                result = true;
            else
            {
                string seasonDirectory;
                DirectoryInfo directoryInfo;
                DateTime dateTime = new(ticks);
                string rootDirectory = appSettings.ResultSettings.RootDirectory;
                (int season, string seasonName) = IDate.GetSeason(dateTime.DayOfYear);
                string eDistanceContentDirectory = IResult.GetResultsDateGroupDirectory(appSettings.ResultSettings, nameof(E_Distance), appSettings.ResultSettings.ResultContent);
                FileSystemInfo fileSystemInfo = new DirectoryInfo(eDistanceContentDirectory);
                string[] checkDirectories =
                [
                    Path.Combine(rootDirectory, "Ancestry"),
                    Path.Combine(rootDirectory, "Facebook"),
                    Path.Combine(rootDirectory, "LinkedIn")
                ];
                foreach (string checkDirectory in checkDirectories)
                {
                    if (checkDirectory == rootDirectory)
                        seasonDirectory = Path.Combine(checkDirectory, $"{dateTime.Year}.{season} {seasonName}");
                    else
                        seasonDirectory = Path.Combine(checkDirectory, $"{dateTime.Year}.{season} {seasonName} {Path.GetFileName(checkDirectory)}");
                    if (!Directory.Exists(seasonDirectory))
                        _ = Directory.CreateDirectory(seasonDirectory);
                    if (result)
                        continue;
                    directories = Directory.GetDirectories(checkDirectory, "*", SearchOption.TopDirectoryOnly);
                    foreach (string directory in directories)
                    {
                        directoryInfo = new(directory);
                        if (directoryInfo.LastWriteTime > fileSystemInfo.LastWriteTime)
                        {
                            result = true;
                            break;
                        }
                    }
                }
            }
        }
        if (result)
            result = true;
        if (!result)
            result = false;
        return result;
    }

    private static ReadOnlyCollections GetReadOnlyCollections(AppSettings appSettings)
    {
        ReadOnlyCollections result;
        ReadOnlyCollection<PersonContainer> personContainers = IPeople.GetPersonContainers(appSettings.ResultSettings, appSettings.MetadataSettings, appSettings.PeopleSettings, appSettings.CompareSettings);
        ReadOnlyCollection<long> personKeys = IPeople.GetPersonKeys(personContainers);
        result = IPeople.GetReadOnlyCollections(appSettings.ResultSettings, appSettings.PeopleSettings, appSettings.DistanceSettings, appSettings.CompareSettings, personContainers, personKeys);
        return result;
    }

    private static ReadOnlyCollection<ExifDirectory> GetMappedExifDirectoryWithEncoding(AppSettings appSettings, ICompare compare, long ticks, ReadOnlyCollections readOnlyCollections)
    {
        ReadOnlyCollection<ExifDirectory> results;
        ReadOnlyCollection<ExifDirectory> exifDirectories = IDistance.GetMapped(appSettings.ResultSettings, appSettings.MetadataSettings, appSettings.PeopleSettings, appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, readOnlyCollections);
        if (exifDirectories.Count == 0 && !appSettings.DistanceSettings.SaveSortingWithoutPerson)
            throw new NotSupportedException($"Switch {nameof(appSettings.DistanceSettings.SaveSortingWithoutPerson)}!");
        results = IDistance.GetMappedExifDirectoryWithEncoding(compare, ticks, exifDirectories);
        if (results.Count == 0 && !appSettings.DistanceSettings.SaveSortingWithoutPerson)
            throw new NotSupportedException($"Switch {nameof(appSettings.DistanceSettings.SaveSortingWithoutPerson)}!");
        return results;
    }

    private void CompareWork(ILogger<Program>? logger, AppSettings appSettings, ICompare compare, long ticks)
    {
        const int updated = 0;
        DistanceLimits? distanceLimits;
        logger?.LogInformation("{Ticks}", ticks);
        ReadOnlyCollection<LocationContainer> matrix;
        ReadOnlyCollection<SaveContainer> saveContainers;
        ReadOnlyCollection<ExifDirectory> exifDirectories;
        ReadOnlyCollection<LocationContainer> preFiltered;
        ReadOnlyCollection<LocationContainer> postFiltered;
        ReadOnlyDictionary<string, LocationContainer> onlyOne;
        bool runToDoCollectionFirst = GetRunToDoCollectionFirst(appSettings, ticks);
        ReadOnlyCollections readOnlyCollections = GetReadOnlyCollections(appSettings);
        ReadOnlyCollection<ExifDirectory> mappedExifDirectoryWithEncoding = GetMappedExifDirectoryWithEncoding(appSettings, compare, ticks, readOnlyCollections);
        ReadOnlyDictionary<int, ReadOnlyDictionary<int, FilePath>> keyValuePairs = IDistance.Extract(appSettings.CompareSettings, mappedExifDirectoryWithEncoding);
        foreach (string outputResolution in appSettings.CompareSettings.OutputResolutions)
        {
            if (runToDoCollectionFirst || outputResolution.Any(char.IsNumber))
                continue;
            _ProgressBar?.Dispose();
            logger?.LogInformation("{outputResolution}", outputResolution);
            exifDirectories = IFace.GetExifDirectories(appSettings.ResultSettings, appSettings.MetadataSettings, appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, outputResolution);
            preFiltered = IDistance.GetPreFilterLocationContainer(appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, readOnlyCollections, keyValuePairs, exifDirectories);
            if (preFiltered.Count == 0)
                continue;
            distanceLimits = new(appSettings.DistanceSettings);
            postFiltered = IDistance.GetPostFilterLocationContainer(preFiltered, distanceLimits);
            if (postFiltered.Count == 0)
                continue;
            matrix = IDistance.GetMatrixLocationContainers(appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, mappedExifDirectoryWithEncoding, distanceLimits, postFiltered);
            if (matrix.Count == 0)
                continue;
            onlyOne = IDistance.GetOnlyOne(appSettings.DistanceSettings, matrix);
            if (onlyOne.Count == 0)
                continue;
            saveContainers = IDistance.GetSaveContainers(appSettings.ResultSettings, appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, outputResolution, onlyOne);
            if (saveContainers.Count == 0)
                continue;
            IDistance.SaveContainers(appSettings.DistanceSettings, appSettings.CompareSettings, compare, ticks, updated, saveContainers);
        }
    }

}