using File_Folder_Helper.Models;
using Microsoft.Extensions.Logging;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
using System.Text.Json;

namespace File_Folder_Helper.Day.Q32024;

internal static partial class Helper20240724
{

    private record FileConnectorConfigurationSystem(string AlternateTargetFolder,
                                                    string FileAgeThreshold,
                                                    string[] SourceFileFilters,
                                                    string TargetFileLocation);

#pragma warning disable IDE0028, IDE0056, IDE0300, IDE0240, IDE0241

    private static readonly HttpClient _HttpClient = new();
    private static readonly string _StaticFileServer = "localhost:5054";
    private static readonly FileConnectorConfigurationSystem _FileConnectorConfiguration = new(
        "D:/Tmp/Phares/AlternateTargetFolder",
        "000:20:00:01",
        [".txt"],
        "D:/Tmp/Phares/TargetFileLocation");

    private static DateTime GetFileAgeThresholdDateTime(string fileAgeThreshold)
    {
        DateTime result = DateTime.Now;
        string[] segments = fileAgeThreshold.Split(':');
        for (int i = 0; i < segments.Length; i++)
        {
            result = i switch
            {
                0 => result.AddDays(double.Parse(segments[i]) * -1),
                1 => result.AddHours(double.Parse(segments[i]) * -1),
                2 => result.AddMinutes(double.Parse(segments[i]) * -1),
                3 => result.AddSeconds(double.Parse(segments[i]) * -1),
                _ => throw new Exception(),
            };
        }
        return result;
    }

    private static string[] GetValidWeeks(DateTime fileAgeThresholdDateTime)
    {
        DateTime dateTime = DateTime.Now;
        Calendar calendar = new CultureInfo("en-US").Calendar;
        string weekOfYear = $"{dateTime:yyyy}_Week_{calendar.GetWeekOfYear(dateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday):00}";
        string lastWeekOfYear = $"{fileAgeThresholdDateTime:yyyy}_Week_{calendar.GetWeekOfYear(fileAgeThresholdDateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday):00}";
        return new string[] { weekOfYear, lastWeekOfYear }.Distinct().ToArray();
    }

    private static string[] GetValidDays(DateTime fileAgeThresholdDateTime)
    {
        DateTime dateTime = DateTime.Now;
        return new string[] { dateTime.ToString("yyyy-MM-dd"), fileAgeThresholdDateTime.ToString("yyyy-MM-dd") }.Distinct().ToArray();
    }

    private static ReadOnlyCollection<NginxFileSystem> GetDayNginxFileSystemCollection(DateTime fileAgeThresholdDateTime, string week, string day, string dayUrl, NginxFileSystem[] dayNginxFileSystemCollection)
    {
        List<NginxFileSystem> results = new();
        DateTime dateTime;
        string nginxFormat = "ddd, dd MMM yyyy HH:mm:ss zzz";
        foreach (NginxFileSystem dayNginxFileSystem in dayNginxFileSystemCollection)
        {
            if (!DateTime.TryParseExact(dayNginxFileSystem.MTime.Replace("GMT", "+00:00"), nginxFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out dateTime))
                continue;
            if (dateTime < fileAgeThresholdDateTime)
                continue;
            results.Add(new(
                Path.GetFullPath(Path.Combine(_FileConnectorConfiguration.TargetFileLocation, week, day, dayNginxFileSystem.Name)),
                string.Concat(dayUrl, '/', dayNginxFileSystem.Name),
                dateTime.ToString(),
                dayNginxFileSystem.Size));
        }
        return results.AsReadOnly();
    }

    private static ReadOnlyCollection<NginxFileSystem> GetDayNginxFileSystemCollection(DateTime fileAgeThresholdDateTime)
    {
#nullable enable
        List<NginxFileSystem> results = new();
        string dayUrl;
        string dayJson;
        string weekJson;
        string checkWeek;
        Task<HttpResponseMessage> task;
        NginxFileSystem[]? dayNginxFileSystemCollection;
        NginxFileSystem[]? weekNginxFileSystemCollection;
        string[] days = GetValidDays(fileAgeThresholdDateTime);
        string[] weeks = GetValidWeeks(fileAgeThresholdDateTime);
        foreach (string week in weeks)
        {
            checkWeek = string.Concat("http://", _StaticFileServer, '/', week);
            task = _HttpClient.GetAsync(checkWeek);
            task.Wait();
            if (!task.Result.IsSuccessStatusCode)
                continue;
            weekJson = _HttpClient.GetStringAsync(checkWeek).Result;
            weekNginxFileSystemCollection = JsonSerializer.Deserialize(weekJson, NginxFileSystemCollectionSourceGenerationContext.Default.NginxFileSystemArray);
            if (weekNginxFileSystemCollection is null)
                continue;
            foreach (NginxFileSystem weekNginxFileSystem in weekNginxFileSystemCollection)
            {
                if (!(from l in days where weekNginxFileSystem.Name == l select false).Any())
                    continue;
                dayUrl = string.Concat(checkWeek, '/', weekNginxFileSystem.Name);
                dayJson = _HttpClient.GetStringAsync(dayUrl).Result;
                dayNginxFileSystemCollection = JsonSerializer.Deserialize(dayJson, NginxFileSystemCollectionSourceGenerationContext.Default.NginxFileSystemArray);
                if (dayNginxFileSystemCollection is null)
                    continue;
                results.AddRange(GetDayNginxFileSystemCollection(fileAgeThresholdDateTime, week, weekNginxFileSystem.Name, dayUrl, dayNginxFileSystemCollection));
            }
        }
        return results.AsReadOnly();
#nullable disable
    }

    private static ReadOnlyCollection<Tuple<DateTime, FileInfo, FileInfo, string>> GetPossible()
    {
        List<Tuple<DateTime, FileInfo, FileInfo, string>> results = new();
        DateTime dateTime;
        FileInfo targetFileInfo;
        FileInfo alternateFileInfo;
        DateTime fileAgeThresholdDateTime = GetFileAgeThresholdDateTime(_FileConnectorConfiguration.FileAgeThreshold);
        ReadOnlyCollection<NginxFileSystem> dayNginxFileSystemCollection = GetDayNginxFileSystemCollection(fileAgeThresholdDateTime);
        foreach (NginxFileSystem nginxFileSystem in dayNginxFileSystemCollection)
        {
            targetFileInfo = new FileInfo(nginxFileSystem.Name);
            if (targetFileInfo.Directory is null)
                continue;
            if (!Directory.Exists(targetFileInfo.Directory.FullName))
                _ = Directory.CreateDirectory(targetFileInfo.Directory.FullName);
            if (!DateTime.TryParse(nginxFileSystem.MTime, out dateTime))
                continue;
            if (targetFileInfo.Exists && targetFileInfo.LastWriteTime == dateTime)
                continue;
            alternateFileInfo = new(Path.Combine(_FileConnectorConfiguration.AlternateTargetFolder, nginxFileSystem.Name));
            results.Add(new(dateTime, targetFileInfo, alternateFileInfo, nginxFileSystem.Type));
        }
        return (from l in results orderby l.Item1 select l).ToList().AsReadOnly();
    }

    private static void Test()
    {
#nullable enable
        if (_HttpClient is null)
            throw new Exception();
        if (string.IsNullOrEmpty(_StaticFileServer))
            throw new Exception();
        if (string.IsNullOrEmpty(_StaticFileServer))
        {
            ReadOnlyCollection<Tuple<DateTime, FileInfo, FileInfo, string>> possibleDownload = GetPossible();
            if (possibleDownload.Count > 0)
            {
                string targetFileName = possibleDownload[0].Item4;
                FileInfo targetFileInfo = possibleDownload[0].Item2;
                FileInfo alternateFileInfo = possibleDownload[0].Item3;
                DateTime matchNginxFileSystemDateTime = possibleDownload[0].Item1;
                // if (alternateFileInfo.Exists)
                //     File.Delete(alternateFileInfo.FullName);
                if (targetFileInfo.Exists)
                    File.Delete(targetFileInfo.FullName);
                string targetJson = _HttpClient.GetStringAsync(targetFileName).Result;
                File.WriteAllText(targetFileInfo.FullName, targetJson);
                targetFileInfo.LastWriteTime = matchNginxFileSystemDateTime;
                // File.Copy(targetFileInfo.FullName, alternateFileInfo.FullName);
                File.AppendAllText(alternateFileInfo.FullName, targetJson);
            }
        }
#nullable disable
    }

    internal static void CopyDirectories(ILogger<Worker> logger, List<string> args)
    {
        Test();
        string[] files;
        Process process;
        string checkDirectory;
        string filter = args[3];
        string replaceWith = args[4];
        string searchPattern = args[2];
        string sourceDirectory = Path.GetFullPath(args[0]);
        string[] foundDirectories = Directory.GetDirectories(sourceDirectory, searchPattern, SearchOption.AllDirectories);
        logger.LogInformation($"Found {foundDirectories.Length} directories");
        foreach (string foundDirectory in foundDirectories)
        {
            if (!foundDirectory.Contains(filter))
                continue;
            logger.LogDebug(foundDirectory);
            checkDirectory = foundDirectory.Replace(filter, replaceWith);
            if (Directory.Exists(checkDirectory))
            {
                files = Directory.GetFiles(checkDirectory, "*", SearchOption.AllDirectories);
                if (files.Length > 0)
                    continue;
                Directory.Delete(checkDirectory);
            }
            process = Process.Start("cmd.exe", $"/c xCopy \"{foundDirectory}\" \"{checkDirectory}\" /S /E /I /H /Y");
            process.WaitForExit();
        }
    }

}