using Microsoft.Extensions.Configuration;
using Phares.Shared;
using Serilog;
using ShellProgressBar;
using View_by_Distance.Rename.Models;
using View_by_Distance.Shared.Models;
using View_by_Distance.Shared.Models.Methods;

namespace View_by_Distance.Rename;

public class Rename
{

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

    public Rename(List<string> args, IsEnvironment isEnvironment, IConfigurationRoot configurationRoot, AppSettings appSettings, string workingDirectory, bool isSilent, IConsole console)
    {
        if (isSilent)
        { }
        if (console is null)
        { }
        _AppSettings = appSettings;
        _IsEnvironment = isEnvironment;
        long ticks = DateTime.Now.Ticks;
        _WorkingDirectory = workingDirectory;
        _ConfigurationRoot = configurationRoot;
        ILogger? log = Log.ForContext<Rename>();
        Dictionary<long, Dictionary<long, List<string>>> fileSizeToCollection = new();
        Property.Models.Configuration propertyConfiguration = Property.Models.Binder.Configuration.Get(isEnvironment, configurationRoot);
        Configuration configuration = Models.Binder.Configuration.Get(isEnvironment, configurationRoot, propertyConfiguration);
        _PropertyConfiguration = propertyConfiguration;
        _Configuration = configuration;
        ProgressBarOptions options = new() { ProgressCharacter = '─', ProgressBarOnBottom = true, DisableBottomPercentage = true };
        propertyConfiguration.Update();
        string? comparePathRoot = Path.GetDirectoryName(appSettings.ComparePathsFile);
        if (comparePathRoot is null || comparePathRoot == propertyConfiguration.RootDirectory)
            throw new Exception("Nested isn't allowed!");
        log.Information(propertyConfiguration.RootDirectory);
        Verify();
        string json = File.ReadAllText(appSettings.ComparePathsFile);
        MatchNginx[]? matchNginxCollection = System.Text.Json.JsonSerializer.Deserialize<MatchNginx[]>(json);
        if (matchNginxCollection is null)
            throw new NullReferenceException(nameof(matchNginxCollection));
        if (matchNginxCollection.Length == 0 && matchNginxCollection[0].ConvertedPath.Contains("~~~"))
            MoveMatches(matchNginxCollection[0]);
        else if (matchNginxCollection.All(l => l.Name.StartsWith("#")) || matchNginxCollection.All(l => l.Name.StartsWith(" #")) || matchNginxCollection.All(l => l.Name.StartsWith("=20")) || matchNginxCollection.All(l => l.Name.StartsWith("#20")))
            Rename2000(matchNginxCollection);
        else if (matchNginxCollection.Any())
        {
            List<string> lines = RenameFilesInDirectories(log, options, matchNginxCollection);
            File.WriteAllLines($"D:/Tmp/Phares/{DateTime.Now.Ticks}.tsv", lines);
            if (comparePathRoot != Path.GetPathRoot(matchNginxCollection[0].ConvertedPath))
                _ = Shared.Models.Stateless.Methods.IPath.DeleteEmptyDirectories(comparePathRoot);
        }
    }

    private void Verify()
    {
        if (_AppSettings is null)
        { }
        if (_IsEnvironment is null)
        { }
        if (_Configuration is null)
        { }
        if (_ConfigurationRoot is null)
        { }
        if (_WorkingDirectory is null)
        { }
    }

    private static void MoveMatches(MatchNginx matchNginx)
    {
        string moveDirectory;
        string checkDirectory;
        string compareDirectory = "D:/";
        int length = matchNginx.ConvertedPath.Length;
        string[] directories = Directory.GetDirectories(matchNginx.ConvertedPath, "*", SearchOption.TopDirectoryOnly);
        foreach (string directory in directories)
        {
            if (!string.IsNullOrEmpty(directory))
                continue;
            checkDirectory = string.Concat(compareDirectory, directory[length..]);
            if (!Directory.Exists(checkDirectory))
                continue;
            moveDirectory = string.Concat(compareDirectory[..^1], directory[length..]);
            Directory.Move(checkDirectory, moveDirectory);
        }
    }

    private static List<(FileHolder, string)> GetRenameUndoToDoCollection(ProgressBar progressBar, string[] files)
    {
        List<(FileHolder, string)> results = new();
        string[] lines;
        string fileName;
        FileHolder fileHolder;
        foreach (string file in files)
        {
            progressBar.Tick();
            fileName = Path.GetFileName(file);
            if (!fileName.EndsWith(".id"))
                continue;
            lines = File.ReadAllLines(file);
            if (lines.Length < 2)
                continue;
            fileHolder = new(lines[0]);
            results.Add(new(fileHolder, lines[1]));
        }
        return results;
    }

    private List<(FileHolder, string)> GetToDoCollection(ProgressBar progressBar, string[] files)
    {
        List<(FileHolder, string)> results = new();
        int? id;
        string? message;
        string checkFile;
        TimeSpan timeSpan;
        DateTime? dateTime;
        DateTime?[] dateTimes;
        FileHolder fileHolder;
        bool isIgnoreExtension;
        string checkFileExtension;
        DateTime? minimumDateTime;
        const string jpg = ".jpg";
        const string jpeg = ".jpeg";
        bool isValidImageFormatExtension;
        bool nameWithoutExtensionIsIdFormat;
        IReadOnlyList<MetadataExtractor.Directory> directories;
        foreach (string file in files)
        {
            progressBar.Tick();
            fileHolder = new(file);
            if (file.EndsWith(".jpg.del"))
            {
                checkFile = file[..^4];
                if (File.Exists(checkFile))
                    continue;
                results.Add(new(fileHolder, checkFile));
                continue;
            }
            if (fileHolder.ExtensionLowered == ".id" || fileHolder.DirectoryName is null)
                continue;
            if (files.Contains($"{fileHolder.FullName}.id"))
                continue;
            isValidImageFormatExtension = _PropertyConfiguration.ValidImageFormatExtensions.Contains(fileHolder.ExtensionLowered);
            isIgnoreExtension = isValidImageFormatExtension && _Configuration.IgnoreExtensions.Contains(fileHolder.ExtensionLowered);
            nameWithoutExtensionIsIdFormat = Shared.Models.Stateless.Methods.IProperty.NameWithoutExtensionIsIdFormat(fileHolder);
            if (!isIgnoreExtension && isValidImageFormatExtension)
            {
                if (fileHolder.ExtensionLowered == jpeg)
                {
                    if (File.Exists($"{fileHolder.FullName}.id"))
                    {
                        checkFile = Path.Combine(fileHolder.DirectoryName, $"{fileHolder.NameWithoutExtension}{jpg}.id");
                        if (File.Exists(checkFile))
                            continue;
                        results.Add(new(new($"{fileHolder.FullName}.id"), checkFile));
                    }
                    checkFile = Path.Combine(fileHolder.DirectoryName, $"{fileHolder.NameWithoutExtension}{jpg}");
                    if (File.Exists(checkFile))
                        continue;
                    results.Add(new(fileHolder, checkFile));
                }
                if (nameWithoutExtensionIsIdFormat)
                    continue;
            }
            (dateTimes, id, message) = Shared.Models.Stateless.Methods.IProperty.Get(fileHolder, isIgnoreExtension, isValidImageFormatExtension);
            minimumDateTime = dateTimes.Min();
            if (minimumDateTime is null || !isIgnoreExtension && isValidImageFormatExtension)
            {
                dateTime = Shared.Models.Stateless.Methods.IProperty.GetDateTimeFromName(fileHolder);
                if (dateTime is null || minimumDateTime is null)
                    timeSpan = new TimeSpan(0);
                else
                    timeSpan = new(Math.Abs(minimumDateTime.Value.Ticks - dateTime.Value.Ticks));
            }
            else
            {
                if (!int.TryParse(Path.GetFileName(fileHolder.DirectoryName)[..4], out int year))
                    year = minimumDateTime.Value.Year;
                if (_Configuration.IgnoreExtensions.Contains(fileHolder.ExtensionLowered))
                    continue;
                try
                { directories = MetadataExtractor.ImageMetadataReader.ReadMetadata(file); }
                catch (Exception) { continue; }
                dateTime = Metadata.Models.Stateless.Methods.IMetadata.GetMinimumDateTime(dateTimes, year, directories);
                timeSpan = new TimeSpan(int.MaxValue);
            }
            if (dateTime is not null && string.IsNullOrEmpty(_AppSettings.CopyTo) && timeSpan.TotalMinutes > _AppSettings.MaxMinutesDelta)
            {
                checkFileExtension = fileHolder.ExtensionLowered == jpeg ? jpg : fileHolder.ExtensionLowered;
                checkFile = Path.Combine(fileHolder.DirectoryName, $"{dateTime.Value:yyyy-MM-dd}.{dateTime.Value.Ticks}.{fileHolder.Length}{checkFileExtension}");
                if (checkFile == fileHolder.FullName)
                    continue;
                results.Add(new(fileHolder, checkFile));
                continue;
            }
            if (id is null)
                continue;
            checkFileExtension = fileHolder.ExtensionLowered == jpeg ? jpg : fileHolder.ExtensionLowered;
            checkFile = Path.Combine(fileHolder.DirectoryName, $"{id.Value}{checkFileExtension}");
            if (checkFile == fileHolder.FullName)
                continue;
            if (File.Exists(checkFile))
            {
                checkFile = string.Concat(checkFile, ".del");
                if (File.Exists(checkFile))
                    continue;
            }
            results.Add(new(fileHolder, checkFile));
        }
        return results;
    }

    private static void Rename2000(MatchNginx[] matchNginxCollection)
    {
        string name;
        string check;
        string? directoryName;
        foreach (MatchNginx matchNginx in matchNginxCollection)
        {
            name = matchNginx.Name.Trim();
            if (name.Length < 1 || (!name.StartsWith("zzz =20") && !name.StartsWith("=20") && !name.StartsWith("#20")))
                continue;
            directoryName = Path.GetDirectoryName(matchNginx.ConvertedPath);
            if (directoryName is null)
                continue;
            if (name.StartsWith("=20") || name.StartsWith("#20"))
                check = Path.Combine(directoryName, name[1..]);
            else
                check = Path.Combine(directoryName, $"zzz {name[5..]}");
            if (Directory.Exists(check) || File.Exists(check))
                continue;
            if (!Directory.Exists(matchNginx.ConvertedPath))
                File.Move(matchNginx.ConvertedPath, check);
            else
                Directory.Move(matchNginx.ConvertedPath, check);
        }
    }

    private static List<string> GetAllFiles(MatchNginx[] matchNginxCollection)
    {
        List<string> allFiles = new();
        string[] files;
        string directoryName;
        ReadOnlySpan<char> span;
        foreach (MatchNginx matchNginx in matchNginxCollection)
        {
            if (matchNginx.ConvertedPath.Length < 6)
                continue;
            directoryName = Path.GetFileName(matchNginx.ConvertedPath);
            if (matchNginx.ConvertedPath.Contains("!---"))
                span = "0";
            else
                span = matchNginx.ConvertedPath.AsSpan(matchNginx.ConvertedPath.Length - 5, 3);
            if (directoryName.Length == 1 && int.TryParse(span, out int age))
                continue;
            if (File.Exists(matchNginx.ConvertedPath))
                continue;
            files = Directory.GetFiles(matchNginx.ConvertedPath, "*", SearchOption.AllDirectories);
            if (files.All(l => l.EndsWith(".id")))
            {
                foreach (string file in files)
                    File.Delete(file);
                continue;
            }
            allFiles.AddRange(files);
        }
        return allFiles;
    }

    private static void CreateDirectories(List<string> directories)
    {
        foreach (string directory in directories)
        {
            if (Directory.Exists(directory))
                continue;
            _ = Directory.CreateDirectory(directory);
        }
    }

    private List<string> CopyInstead(ILogger log, List<(FileHolder, string)> verifiedToDoCollection)
    {
        List<string> results = new();
        string copyTo;
        string? directory;
        ConsoleKey? consoleKey = null;
        List<string> distinctDirectories = new();
        List<(FileHolder, string)> copyCollection = new();
        foreach ((FileHolder fileHolder, string to) in verifiedToDoCollection)
        {
            copyTo = $"{_AppSettings.CopyTo}{to[1..]}";
            directory = Path.GetDirectoryName(copyTo);
            if (directory is null)
                continue;
            copyCollection.Add(new(fileHolder, copyTo));
            if (distinctDirectories.Contains(directory))
                continue;
            distinctDirectories.Add(directory);
        }
        CreateDirectories(distinctDirectories);
        log.Information($"Ready to Copy {verifiedToDoCollection.Count} file(s)?");
        for (int y = 0; y < int.MaxValue; y++)
        {
            log.Information("Press \"Y\" key to copy file(s), \"N\" key to log file(s) or close console to not copy files");
            consoleKey = System.Console.ReadKey().Key;
            if (consoleKey is ConsoleKey.Y or ConsoleKey.N)
                break;
        }
        log.Information(". . .");
        if (consoleKey is null || consoleKey.Value != ConsoleKey.Y)
            log.Information("Nothing Copied!");
        else
        {
            foreach ((FileHolder fileHolder, string to) in verifiedToDoCollection)
            {
                results.Add(fileHolder.NameWithoutExtension);
                File.Copy(fileHolder.FullName, to);
            }
            log.Information("Done Copying");
        }
        return results;
    }

    private static List<string> Move(ILogger log, List<(FileHolder, string)> verifiedToDoCollection)
    {
        List<string> results = new();
        ConsoleKey? consoleKey = null;
        log.Information($"Ready to Move {verifiedToDoCollection.Count} file(s)?");
        for (int y = 0; y < int.MaxValue; y++)
        {
            log.Information("Press \"Y\" key to move file(s), \"N\" key to log file(s) or close console to not move files");
            consoleKey = System.Console.ReadKey().Key;
            if (consoleKey is ConsoleKey.Y or ConsoleKey.N)
                break;
        }
        log.Information(". . .");
        if (consoleKey is null || consoleKey.Value != ConsoleKey.Y)
            log.Information("Nothing moved!");
        else
        {
            foreach ((FileHolder fileHolder, string to) in verifiedToDoCollection)
            {
                results.Add(fileHolder.NameWithoutExtension);
                File.Move(fileHolder.FullName, to);
                File.WriteAllText($"{to}.id", $"{to}{Environment.NewLine}{fileHolder.FullName}");
            }
            log.Information("Done Moving");
        }
        return results;
    }

    private List<string> RenameFilesInDirectories(ILogger log, ProgressBarOptions options, MatchNginx[] matchNginxCollection)
    {
        List<string> results = new();
        string[] files;
        string message;
        int distinctCount;
        ProgressBar progressBar;
        List<string> distinctCollection = new();
        List<(FileHolder, string)> toDoCollection;
        List<(FileHolder, string)> verifiedToDoCollection;
        List<string> allFiles = GetAllFiles(matchNginxCollection);
        for (int i = 1; i < 3; i++)
        {
            message = $"{i}) Renaming files";
            if (_AppSettings.RenameUndo && i == 1)
                continue;
            files = i == 2 ? allFiles.ToArray() : (from l in allFiles where l.Contains("Rename") select l).ToArray();
            progressBar = new(files.Length, message, options);
            if (!files.Any())
                continue;
            distinctCollection.Clear();
            if (!_AppSettings.RenameUndo)
                toDoCollection = GetToDoCollection(progressBar, files);
            else
                toDoCollection = GetRenameUndoToDoCollection(progressBar, files);
            foreach ((FileHolder fileHolder, string to) in toDoCollection)
            {
                if (distinctCollection.Contains(to))
                    continue;
                distinctCollection.Add(to);
            }
            distinctCount = distinctCollection.Count;
            if (toDoCollection.Count != distinctCount)
                continue;
            verifiedToDoCollection = new();
            foreach ((FileHolder fileHolder, string to) in toDoCollection)
            {
                if (File.Exists(to))
                    continue;
                verifiedToDoCollection.Add(new(fileHolder, to));
            }
            if (!verifiedToDoCollection.Any())
                continue;
            if (string.IsNullOrEmpty(_AppSettings.CopyTo))
                results.AddRange(Move(log, toDoCollection));
            else
                results.AddRange(CopyInstead(log, toDoCollection));
            progressBar.Dispose();
        }
        return results;
    }

}