using OI.Metrology.Shared.DataModels;
using OI.Metrology.Shared.Models;
using OI.Metrology.Shared.Models.Stateless;
using OI.Metrology.Wafer.Counter.Models;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Text.Json;

namespace OI.Metrology.Wafer.Counter.Repository;

public class FileShareRepository : IFileShareRepository
{

    private readonly AppSettings _AppSettings;

    public FileShareRepository(AppSettings appSettings) =>
        _AppSettings = appSettings;

    Uri IFileShareRepository.Append(Uri uri, params string[] paths) =>
        new(paths.Aggregate(uri.AbsoluteUri, (current, path) =>
            string.Format("{0}/{1}", current.TrimEnd('/'), path.TrimStart('/'))));

    private Uri GetEndPoint(HttpClient httpClient, string method)
    {
        Uri result;
        if (httpClient.BaseAddress is null)
            throw new NullReferenceException(nameof(httpClient.BaseAddress));
        IFileShareRepository fileShareRepository = this;
        result = fileShareRepository.Append(httpClient.BaseAddress, "api", "v1", "file-share", method);
        return result;
    }

    void IFileShareRepository.CopyFile(string from, string to)
    {
        string directory = Path.GetDirectoryName(to) ?? throw new NullReferenceException();
        if (!Directory.Exists(directory))
            _ = Directory.CreateDirectory(directory);
        File.Copy(from, to);
    }

    void IFileShareRepository.MoveFile(string from, string to)
    {
        string directory = Path.GetDirectoryName(to) ?? throw new NullReferenceException();
        if (!Directory.Exists(directory))
            _ = Directory.CreateDirectory(directory);
        if (File.Exists(to))
            File.Move(to, $"{to}.{DateTime.Now.Ticks}.old");
        File.Move(from, to);
    }

    void IFileShareRepository.FileWrite(string path, string contents)
    {
        string directory = Path.GetDirectoryName(path) ?? throw new NullReferenceException();
        if (!Directory.Exists(directory))
            _ = Directory.CreateDirectory(directory);
        File.WriteAllText(path, contents);
    }

    void IFileShareRepository.CopyFile(HttpClient httpClient, string from, string to)
    {
        Uri uri = GetEndPoint(httpClient, "copy-file");
        Task<HttpResponseMessage> httpResponseMessage = httpClient.GetAsync(uri);
        httpResponseMessage.Wait();
        if (httpResponseMessage.Result.StatusCode != System.Net.HttpStatusCode.OK)
            throw new Exception(httpResponseMessage.Result.StatusCode.ToString());
    }

    void IFileShareRepository.MoveFile(HttpClient httpClient, string from, string to)
    {
        Uri uri = GetEndPoint(httpClient, "move-file");
        Task<HttpResponseMessage> httpResponseMessage = httpClient.GetAsync(uri);
        httpResponseMessage.Wait();
        if (httpResponseMessage.Result.StatusCode != System.Net.HttpStatusCode.OK)
            throw new Exception(httpResponseMessage.Result.StatusCode.ToString());
    }

    HttpResponseMessage IFileShareRepository.ReadFile(HttpClient httpClient, Uri uri)
    {
        HttpResponseMessage result;
        Task<HttpResponseMessage> httpResponseMessage = httpClient.GetAsync(uri);
        httpResponseMessage.Wait();
        result = httpResponseMessage.Result;
        return result;
    }

    ReadOnlyCollection<NginxFileSystemSortable> IFileShareRepository.GetNginxFileSystemSortableCollection(HttpClient httpClient, Uri uri, string? endsWith)
    {
        List<NginxFileSystemSortable> results = new();
        Task<HttpResponseMessage> httpResponseMessage = httpClient.GetAsync(uri);
        httpResponseMessage.Wait();
        if (httpResponseMessage.Result.StatusCode == System.Net.HttpStatusCode.OK)
        {
            FileShareRepository fileShareRepository = this;
            Task<string> json = httpResponseMessage.Result.Content.ReadAsStringAsync();
            json.Wait();
            NginxFileSystem[]? nginxFileSystemCollection = JsonSerializer.Deserialize(json.Result, NginxFileSystemCollectionSourceGenerationContext.Default.NginxFileSystemArray);
            List<NginxFileSystemSortable> nginxFileSystemSortableCollection = NginxFileSystemSortable.Convert(fileShareRepository, uri, nginxFileSystemCollection);
            foreach (NginxFileSystemSortable nginxFileSystemSortable in nginxFileSystemSortableCollection.OrderByDescending(l => l.DateTime))
            {
                if (!string.IsNullOrEmpty(endsWith) && !nginxFileSystemSortable.Name.EndsWith(endsWith))
                    continue;
                results.Add(nginxFileSystemSortable);
            }
        }
        return new(results);
    }

    private static ReadOnlyCollection<string> GetValidDirectories(string equipmentDirectory, DateTime startDateTime, DateTime endDateTime)
    {
        List<string> results = [];
        DateTime dateTime;
        string weekOfYear;
        Calendar calendar = new CultureInfo("en-US").Calendar;
        for (int i = 0; i < int.MaxValue; i++)
        {
            dateTime = startDateTime.AddDays(i);
            if (dateTime > endDateTime)
                break;
            weekOfYear = $"{dateTime:yyyy}_Week_{calendar.GetWeekOfYear(dateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday):00}";
            results.Add(Path.Combine(equipmentDirectory, weekOfYear, dateTime.ToString("yyyy-MM-dd")));
        }
        return new(results);
    }

    private static ReadOnlyCollection<string> GetFiles(CharacterizationParameters characterizationParameters, string equipmentDirectory, string searchPattern, DateTime startDateTime, DateTime endDateTime, ReadOnlyCollection<string> validDirectories)
    {
        List<string> results = [];
        string[] directories;
        string startDateTimeTicks = startDateTime.Ticks.ToString();
        string delta = (endDateTime.Ticks - startDateTime.Ticks).ToString();
        string ticksSearchPattern = $"{startDateTime.Ticks.ToString()[..(startDateTimeTicks.Length - delta.Length - 1)]}*";
        bool check = characterizationParameters.SearchPattern is null || searchPattern == characterizationParameters.SearchPattern;
        if (check)
            results.AddRange(Directory.GetFiles(equipmentDirectory, searchPattern, SearchOption.AllDirectories));
        foreach (string validDirectory in validDirectories)
        {
            if (string.IsNullOrEmpty(validDirectory) || !Directory.Exists(validDirectory))
                continue;
            if (check)
                results.AddRange(Directory.GetFiles(validDirectory, searchPattern, SearchOption.AllDirectories));
            else
            {
                directories = Directory.GetDirectories(validDirectory, ticksSearchPattern, SearchOption.AllDirectories);
                foreach (string directory in directories)
                    results.AddRange(Directory.GetFiles(directory, searchPattern, SearchOption.TopDirectoryOnly));
            }
        }
        return new(results);
    }

    private static ReadOnlyCollection<FileInfo> GetCollection(CharacterizationParameters characterizationParameters, string equipmentDirectory, string searchPattern, DateTime startDateTime, DateTime endDateTime, ReadOnlyCollection<string> validDirectories)
    {
        FileInfo[] results;
        ReadOnlyCollection<string> files = GetFiles(characterizationParameters, equipmentDirectory, searchPattern, startDateTime, endDateTime, validDirectories);
        FileInfo[] collection = files.Select(l => new FileInfo(l)).ToArray();
        results = (from l in collection where l.LastWriteTime >= startDateTime && l.LastWriteTime <= endDateTime orderby l.LastWriteTime descending select l).ToArray();
        return new(results);
    }

    private static ReadOnlyCollection<string> GetDirectoryNames(string directory)
    {
        List<string> results = new();
        string? fileName;
        string? checkDirectory = directory;
        string? pathRoot = Path.GetPathRoot(directory);
        string extension = Path.GetExtension(directory);
        if (string.IsNullOrEmpty(pathRoot))
            throw new NullReferenceException(nameof(pathRoot));
        if (Directory.Exists(directory))
        {
            fileName = Path.GetFileName(directory);
            if (!string.IsNullOrEmpty(fileName))
                results.Add(fileName);
        }
        else if ((string.IsNullOrEmpty(extension) || extension.Length > 3) && !File.Exists(directory))
        {
            fileName = Path.GetFileName(directory);
            if (!string.IsNullOrEmpty(fileName))
                results.Add(fileName);
        }
        for (int i = 0; i < int.MaxValue; i++)
        {
            checkDirectory = Path.GetDirectoryName(checkDirectory);
            if (string.IsNullOrEmpty(checkDirectory) || checkDirectory == pathRoot)
                break;
            fileName = Path.GetFileName(checkDirectory);
            if (string.IsNullOrEmpty(fileName))
                continue;
            results.Add(fileName);
        }
        results.Add(pathRoot);
        results.Reverse();
        return new(results);
    }

    private static ReadOnlyCollection<CharacterizationInfo> GetCharacterizationData(CharacterizationParameters characterizationParameters, string equipmentDirectory, string searchPattern)
    {
        List<CharacterizationInfo> results = [];
        string[] lines;
        string? directoryName;
        string? checkDirectory;
        CharacterizationInfo archiveInfo;
        ReadOnlyCollection<string> directoryNames;
        DateTime endDateTime = characterizationParameters.EndTime is null ? DateTime.Now : DateTime.Parse(characterizationParameters.EndTime).ToLocalTime();
        DateTime startDateTime = characterizationParameters.StartTime is null ? DateTime.Now.AddHours(-6) : DateTime.Parse(characterizationParameters.StartTime).ToLocalTime();
        ReadOnlyCollection<string> validDirectories = GetValidDirectories(equipmentDirectory, startDateTime, endDateTime);
        ReadOnlyCollection<FileInfo> collection = GetCollection(characterizationParameters, equipmentDirectory, searchPattern, startDateTime, endDateTime, validDirectories);
        foreach (FileInfo fileInfo in collection)
        {
            if (string.IsNullOrEmpty(fileInfo.DirectoryName))
                continue;
            checkDirectory = fileInfo.DirectoryName;
            directoryName = Path.GetFileName(fileInfo.DirectoryName);
            directoryNames = GetDirectoryNames(fileInfo.DirectoryName);
            foreach (string _ in directoryNames)
            {
                if (string.IsNullOrEmpty(checkDirectory))
                    continue;
                if (validDirectories.Contains(checkDirectory))
                {
                    directoryName = Path.GetFileName(checkDirectory);
                    break;
                }
            }
            lines = File.ReadAllLines(fileInfo.FullName);
            archiveInfo = new(directoryName, fileInfo.LastWriteTime, lines);
            results.Add(archiveInfo);
        }
        return new(results);
    }

    ReadOnlyCollection<CharacterizationInfo> IFileShareRepository.GetArchiveData(CharacterizationParameters characterizationParameters)
    {
        List<CharacterizationInfo> results = [];
        string searchPattern;
        string equipmentDirectory;
        if (!string.IsNullOrEmpty(characterizationParameters.Area) && !string.IsNullOrEmpty(characterizationParameters.WaferSize))
        {
            searchPattern = characterizationParameters.SearchPattern is null ? "*" : characterizationParameters.SearchPattern;
            equipmentDirectory = Path.Combine(_AppSettings.EcCharacterizationSi, "WaferCounter", characterizationParameters.Area, characterizationParameters.WaferSize);
            if (Directory.Exists(equipmentDirectory))
                results.AddRange(GetCharacterizationData(characterizationParameters, equipmentDirectory, searchPattern));
        }
        if (!string.IsNullOrEmpty(characterizationParameters.EquipmentId))
        {
            searchPattern = "*.json";
            equipmentDirectory = Path.Combine(_AppSettings.EcCharacterizationSi, "Archive", characterizationParameters.EquipmentId);
            if (Directory.Exists(equipmentDirectory))
                results.AddRange(GetCharacterizationData(characterizationParameters, equipmentDirectory, searchPattern));
        }
        return new(results);
    }

    ReadOnlyCollection<ToolTypeNameId> IFileShareRepository.GetEquipmentIds()
    {
        List<ToolTypeNameId> results = [];
        string directoryName;
        ToolTypeNameId toolTypeNameId;
        string archiveDirectory = Path.Combine(_AppSettings.EcCharacterizationSi, "Archive");
        string[] directories = Directory.GetDirectories(archiveDirectory, "*", SearchOption.TopDirectoryOnly);
        string[] fileNames = Directory.GetFiles(archiveDirectory, "*.json", SearchOption.TopDirectoryOnly).Select(l => Path.GetFileNameWithoutExtension(l)).ToArray();
        for (int i = 0; i < directories.Length; i++)
        {
            directoryName = Path.GetFileName(directories[i]);
            if (!fileNames.Contains(directoryName))
                continue;
            toolTypeNameId = new() { ID = i, ToolTypeName = directoryName };
            results.Add(toolTypeNameId);
        }
        return new(results);
    }

}