using System.Globalization;
using System.Text.Json;
using View_by_Distance.Shared.Models;

namespace View_by_Distance.Map.Models.Stateless;

public class ByDeterministicHashCode
{

    private static void SetOther(string resizeFilenameExtension, Person[] people, string deterministicHashCodePeopleDirectory, List<double> skipCollection, List<(string, int?, PersonBirthday[], long)> peopleCollection)
    {
        long ticks;
        string json;
        string[] segments;
        int? approximateYears;
        string groupDirectoryName;
        string personKeyFormatted;
        PersonBirthday[] collection;
        string personKeyJsonFileName;
        List<long> personKeys = new();
        string[] personKeyDirectories;
        string personKeyJsonDirectory;
        PersonBirthday? personBirthday;
        string[] personDisplayDirectories;
        string convertedPersonKeyDirectory;
        string? personDisplayDirectoryName;
        List<PersonBirthday> personBirthdays;
        Dictionary<string, Person> personKeyValuePairs = new();
        foreach (Person person in people)
        {
            personKeyFormatted = Shared.Models.Stateless.Methods.IPersonBirthday.GetFormatted(person.Birthday);
            if (personKeyValuePairs.ContainsKey(personKeyFormatted))
                break;
            personKeyValuePairs.Add(personKeyFormatted, person);
        }
        string[] groupDirectories = Directory.GetDirectories(deterministicHashCodePeopleDirectory, "*", SearchOption.TopDirectoryOnly);
        foreach (string groupDirectory in groupDirectories)
        {
            groupDirectoryName = Path.GetFileName(groupDirectory);
            if (groupDirectoryName[0] == '!')
            {
                skipCollection.AddRange(from l in Directory.GetFiles(groupDirectory, $"*{resizeFilenameExtension}", SearchOption.AllDirectories) select double.Parse(Path.GetFileNameWithoutExtension(l)));
                continue;
            }
            else if (groupDirectoryName[0] is not '_' and not '~' and not '^')
                continue;
            skipCollection.AddRange(from l in Directory.GetFiles(groupDirectory, $"*{resizeFilenameExtension}", SearchOption.AllDirectories) select double.Parse(Path.GetFileNameWithoutExtension(l)));
            personDisplayDirectories = Directory.GetDirectories(groupDirectory, "*", SearchOption.TopDirectoryOnly);
            foreach (string personDisplayDirectory in personDisplayDirectories)
            {
                personBirthdays = new();
                personDisplayDirectoryName = Path.GetFileName(personDisplayDirectory);
                if (string.IsNullOrEmpty(personDisplayDirectoryName))
                    continue;
                if (groupDirectoryName[0] != '~')
                    approximateYears = null;
                else
                {
                    segments = personDisplayDirectoryName.Split('~');
                    if (segments.Length == 1 || !int.TryParse(segments[1].Split('-')[0], out int years))
                        approximateYears = null;
                    else
                        approximateYears = years;
                }
                personKeyDirectories = Directory.GetDirectories(personDisplayDirectory, "*", SearchOption.TopDirectoryOnly);
                foreach (string personKeyDirectory in personKeyDirectories)
                {
                    personKeyFormatted = Path.GetFileName(personKeyDirectory);
                    if (!DateTime.TryParseExact(personKeyFormatted, "MM.dd.yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime birthday))
                        personBirthday = Shared.Models.Stateless.Methods.IPersonBirthday.GetPersonBirthday(personKeyFormatted);
                    else
                    {
                        personBirthday = new PersonBirthday(birthday);
                        personKeyFormatted = Shared.Models.Stateless.Methods.IPersonBirthday.GetFormatted(personBirthday);
                        convertedPersonKeyDirectory = Path.Combine(personDisplayDirectory, personKeyFormatted);
                        if (!Directory.Exists(convertedPersonKeyDirectory))
                            Directory.Move(personKeyDirectory, convertedPersonKeyDirectory);
                    }
                    if (personBirthday is null)
                        continue;
                    personBirthdays.Add(personBirthday);
                }
                if (!personBirthdays.Any())
                    continue;
                foreach (string personKeyDirectory in personKeyDirectories)
                {
                    personKeyFormatted = Path.GetFileName(personKeyDirectory);
                    personBirthday = Shared.Models.Stateless.Methods.IPersonBirthday.GetPersonBirthday(personKeyFormatted);
                    if (personBirthday is null)
                        continue;
                    if (personKeyValuePairs.ContainsKey(personKeyFormatted))
                    {
                        personKeyJsonDirectory = Path.Combine(personDisplayDirectory, personKeyFormatted);
                        if (!Directory.Exists(personKeyJsonDirectory))
                            Directory.Move(personKeyDirectory, personKeyJsonDirectory);
                        personKeyJsonFileName = Path.Combine(personKeyJsonDirectory, $"{personKeyFormatted}.json");
                        json = JsonSerializer.Serialize(personKeyValuePairs[personKeyFormatted], new JsonSerializerOptions() { WriteIndented = true });
                        _ = Shared.Models.Stateless.Methods.IPath.WriteAllText(personKeyJsonFileName, json, updateDateWhenMatches: false, compareBeforeWrite: true, updateToWhenMatches: null);
                    }
                    collection = personBirthdays.OrderByDescending(l => l.Value).ToArray();
                    ticks = collection[0].Value.Ticks;
                    peopleCollection.Add(new(personDisplayDirectoryName, approximateYears, collection, ticks));
                    for (int i = 0; i < collection.Length; i++)
                    {
                        ticks = collection[i].Value.Ticks;
                        personKeys.Add(ticks);
                    }
                }
            }
        }
        approximateYears = null;
        const string displayDirectoryName = Property.Models.Stateless.IResult.AllInOne;
        DateTime incrementDate = new(Shared.Models.Stateless.IPersonBirthday.FirstYear, 1, 1);
        for (int i = 0; i < 500; i++)
        {
            ticks = incrementDate.Ticks;
            personBirthday = new(incrementDate);
            incrementDate = incrementDate.AddDays(1);
            personKeyFormatted = Shared.Models.Stateless.Methods.IPersonBirthday.GetFormatted(personBirthday);
            if (personKeys.Contains(ticks))
                continue;
            personKeys.Add(ticks);
            peopleCollection.Add(new(displayDirectoryName, approximateYears, new PersonBirthday[] { personBirthday }, ticks));
        }
    }

    internal static void SetKeyValuePairs(string zPropertyHolderContentDirectory, List<(PersonBirthday, double)> deterministicHashCodeCollection, List<(PersonBirthday, double)> incorrectDeterministicHashCodeCollection, Dictionary<int, List<Face>> keyValuePairs)
    {
        string[] files;
        string personKey;
        string[] yearDirectories;
        string ticksDirectoryName;
        string? personFirstInitial;
        string[] personKeyDirectories;
        string[] personNameDirectories;
        PersonBirthday? personBirthday;
        string[] personNameLinkDirectories;
        string? personFirstInitialDirectory;
        double? reversedDeterministicHashCodeKey;
        bool keyValuePairsAny = keyValuePairs.Any();
        string[] ticksDirectories = Directory.GetDirectories(zPropertyHolderContentDirectory, "*", SearchOption.TopDirectoryOnly);
        foreach (string ticksDirectory in ticksDirectories)
        {
            ticksDirectoryName = Path.GetFileName(ticksDirectory);
            if (ticksDirectoryName.Length < 3 || ticksDirectoryName[0] != '(' || ticksDirectoryName[^1] != ')')
                continue;
            personKeyDirectories = Directory.GetDirectories(ticksDirectory, "*", SearchOption.TopDirectoryOnly);
            foreach (string personKeyDirectory in personKeyDirectories)
            {
                personKey = Path.GetFileName(personKeyDirectory);
                if (personKey.Length != Shared.Models.Stateless.IPersonBirthday.Format.Length)
                    personBirthday = null;
                else
                {
                    personBirthday = Shared.Models.Stateless.Methods.IPersonBirthday.GetPersonBirthday(personKey);
                    if (personBirthday is null)
                        continue;
                }
                yearDirectories = Directory.GetDirectories(personKeyDirectory, "*", SearchOption.TopDirectoryOnly);
                foreach (string yearDirectory in yearDirectories)
                {
                    files = Directory.GetFiles(yearDirectory, "*", SearchOption.TopDirectoryOnly);
                    personNameDirectories = Directory.GetDirectories(yearDirectory, "*", SearchOption.TopDirectoryOnly);
                    foreach (string file in files)
                        File.Delete(file);
                    foreach (string personNameDirectory in personNameDirectories)
                    {
                        personFirstInitial = Path.GetFileName(personNameDirectory)[..1];
                        if (personFirstInitial is null)
                            continue;
                        personFirstInitialDirectory = Path.Combine(yearDirectory, personFirstInitial);
                        files = Directory.GetFiles(personNameDirectory, "*", SearchOption.TopDirectoryOnly);
                        if (personKey == nameof(Closest) && files.Any())
                            throw new Exception($"Move personKey directories up one from {nameof(Closest)} and delete {nameof(Closest)} directory!");
                        if (personBirthday is null)
                            continue;
                        foreach (string file in files)
                        {
                            if (file.EndsWith(".lnk") || file.EndsWith(".json"))
                                continue;
                            reversedDeterministicHashCodeKey = Shared.Models.Stateless.Methods.IMapping.GetReversedDeterministicHashCodeKey(keyValuePairsAny, keyValuePairs, file);
                            if (reversedDeterministicHashCodeKey is null)
                                continue;
                            deterministicHashCodeCollection.Add(new(personBirthday, reversedDeterministicHashCodeKey.Value));
                        }
                        personNameLinkDirectories = Directory.GetDirectories(personNameDirectory, "*", SearchOption.TopDirectoryOnly);
                        foreach (string personNameLinkDirectory in personNameLinkDirectories)
                        {
                            files = Directory.GetFiles(personNameLinkDirectory, "*", SearchOption.TopDirectoryOnly);
                            foreach (string file in files)
                            {
                                if (!file.EndsWith(".lnk"))
                                    continue;
                                File.Delete(file);
                            }
                            _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(personNameLinkDirectory);
                        }
                        if (personNameDirectory == personFirstInitialDirectory)
                            continue;
                        Directory.Move(personNameDirectory, personFirstInitialDirectory);
                        _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(personNameDirectory);
                    }
                    _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(yearDirectory);
                }
                _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(personKeyDirectory);
            }
            _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(ticksDirectory);
            _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(ticksDirectory);
        }
    }

    private static List<long> GetTicks(Dictionary<int, PersonBirthday[]> deterministicHashCodeUnknownFaceKeyValuePairs)
    {
        List<long> results = new();
        long personKey;
        foreach (KeyValuePair<int, PersonBirthday[]> keyValuePair in deterministicHashCodeUnknownFaceKeyValuePairs)
        {
            foreach (PersonBirthday personBirthday in keyValuePair.Value)
            {
                personKey = personBirthday.Value.Ticks;
                results.Add(personKey);
            }
        }
        results = results.Distinct().ToList();
        return results;
    }

    private static void Set(List<(PersonBirthday PersonBirthday, double IdAndNormalizedPixelPercentage)> deterministicHashCodeCollection, List<long> deterministicHashCodePersonKeys, Dictionary<double, List<PersonBirthday>> deterministicHashCodeScope)
    {
        long personKey;
        deterministicHashCodeCollection = (from l in deterministicHashCodeCollection orderby l.IdAndNormalizedPixelPercentage select l).ToList();
        foreach ((PersonBirthday personBirthday, double idAndNormalizedPixelPercentage) in deterministicHashCodeCollection)
        {
            if (!deterministicHashCodeScope.ContainsKey(idAndNormalizedPixelPercentage))
                deterministicHashCodeScope.Add(idAndNormalizedPixelPercentage, new());
            deterministicHashCodeScope[idAndNormalizedPixelPercentage].Add(personBirthday);
            personKey = personBirthday.Value.Ticks;
            deterministicHashCodePersonKeys.Add(personKey);
        }
    }

    internal static void SetByRef(string resizeFilenameExtension, Person[] people, List<double> skipCollection, Dictionary<long, (string, int?, PersonBirthday[], long)> peopleKeyValuePairs, List<long> notMappedTicks, Dictionary<int, PersonBirthday[]> deterministicHashCodeUnknownFaceKeyValuePairs, Dictionary<double, PersonBirthday[]> deterministicHashCodeKeyValuePairs, Dictionary<double, PersonBirthday[]> incorrectDeterministicHashCodeKeyValuePairs, string zPropertyHolderContentDirectory, string zPropertyHolderPeopleContentDirectory)
    {
        Dictionary<int, List<Face>> keyValuePairs = new();
        List<long> deterministicHashCodePersonKeys = new();
        List<(string, int?, PersonBirthday[], long)> peopleCollection = new();
        Dictionary<double, List<PersonBirthday>> deterministicHashCodeScope = new();
        Dictionary<double, List<PersonBirthday>> incorrectDeterministicHashCodeScope = new();
        List<long> deterministicHashCodeUnknownFacePersonKeys = GetTicks(deterministicHashCodeUnknownFaceKeyValuePairs);
        List<(PersonBirthday PersonBirthday, double IdAndNormalizedPixelPercentage)> incorrectDeterministicHashCodeCollection = new();
        List<(PersonBirthday PersonBirthday, double IdAndNormalizedPixelPercentage)> deterministicHashCodeCollection = new();
        SetOther(resizeFilenameExtension, people, zPropertyHolderPeopleContentDirectory, skipCollection, peopleCollection);
        SetKeyValuePairs(zPropertyHolderContentDirectory, deterministicHashCodeCollection, incorrectDeterministicHashCodeCollection, keyValuePairs);
        Set(deterministicHashCodeCollection, deterministicHashCodePersonKeys, deterministicHashCodeScope);
        incorrectDeterministicHashCodeCollection = (from l in incorrectDeterministicHashCodeCollection orderby l.IdAndNormalizedPixelPercentage select l).ToList();
        deterministicHashCodePersonKeys = deterministicHashCodePersonKeys.Distinct().ToList();
        foreach ((PersonBirthday personBirthday, double idAndNormalizedPixelPercentage) in incorrectDeterministicHashCodeCollection)
        {
            if (!incorrectDeterministicHashCodeScope.ContainsKey(idAndNormalizedPixelPercentage))
                incorrectDeterministicHashCodeScope.Add(idAndNormalizedPixelPercentage, new());
            incorrectDeterministicHashCodeScope[idAndNormalizedPixelPercentage].Add(personBirthday);
        }
        foreach (KeyValuePair<double, List<PersonBirthday>> keyValuePair in deterministicHashCodeScope)
            deterministicHashCodeKeyValuePairs.Add(keyValuePair.Key, keyValuePair.Value.Distinct().ToArray());
        foreach (KeyValuePair<double, List<PersonBirthday>> keyValuePair in incorrectDeterministicHashCodeScope)
            incorrectDeterministicHashCodeKeyValuePairs.Add(keyValuePair.Key, keyValuePair.Value.Distinct().ToArray());
        if (peopleCollection.Any())
        {
            foreach ((string displayDirectoryName, int? approximateYears, PersonBirthday[] personBirthdays, long ticks) in peopleCollection)
            {
                if (peopleKeyValuePairs.ContainsKey(ticks) && peopleKeyValuePairs[ticks].Item1 != displayDirectoryName)
                    throw new NotImplementedException();
                if (deterministicHashCodeUnknownFacePersonKeys.Contains(ticks) || deterministicHashCodePersonKeys.Contains(ticks))
                    peopleKeyValuePairs.Add(ticks, new(displayDirectoryName, approximateYears, personBirthdays, ticks));
                else
                    notMappedTicks.Add(ticks);
            }
        }
        if (deterministicHashCodeUnknownFacePersonKeys.Any() || deterministicHashCodePersonKeys.Any())
        {
            int? approximateYears = null;
            PersonBirthday? personBirthday;
            const string displayDirectoryName = Property.Models.Stateless.IResult.AllInOne;
            foreach (long personKey in deterministicHashCodeUnknownFacePersonKeys)
            {
                if (!peopleKeyValuePairs.ContainsKey(personKey))
                {
                    personBirthday = Shared.Models.Stateless.Methods.IPersonBirthday.GetPersonBirthday(personKey);
                    peopleKeyValuePairs.Add(personKey, new(displayDirectoryName, approximateYears, new PersonBirthday[] { personBirthday }, personKey));
                }
            }
            foreach (long personKey in deterministicHashCodePersonKeys)
            {
                if (!peopleKeyValuePairs.ContainsKey(personKey))
                {
                    personBirthday = Shared.Models.Stateless.Methods.IPersonBirthday.GetPersonBirthday(personKey);
                    peopleKeyValuePairs.Add(personKey, new(displayDirectoryName, approximateYears, new PersonBirthday[] { personBirthday }, personKey));
                }
            }
        }
    }

}