using File_Watcher.Models;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Text;

namespace File_Watcher.Helpers;

internal static partial class HelperCompass
{

    private static bool _FirstRun = true;

    private static void MapDrives(AppSettings appSettings, ILogger<Worker> logger)
    {
        Process? process;
        string arguments;
        string decrypted;
        string? pathRoot;
        string[] segments;
        string standardError;
        string standardOutput;
        string fileName = "net";
        StringBuilder stringBuilder = new();
        if (appSettings.DriveConfiguration.Use is not null && appSettings.DriveConfiguration.Use.Value)
        {
            pathRoot = Path.GetPathRoot(appSettings.DriveConfiguration.Share);
            if (!string.IsNullOrEmpty(pathRoot) && !Directory.Exists(pathRoot))
            {
                if (string.IsNullOrEmpty(appSettings.DriveConfiguration.Password))
                    decrypted = string.Empty;
                else
                    decrypted = RijndaelEncryption.Decrypt(appSettings.DriveConfiguration.Password, appSettings.Company);
                arguments = $"use {appSettings.DriveConfiguration.Letter}: \"{appSettings.DriveConfiguration.Share}\" /p:yes /user:{appSettings.DriveConfiguration.User} {decrypted}";
                _ = stringBuilder.Clear();
                segments = arguments.Split(' ');
                for (int j = 0; j < segments.Length - 1; j++)
                    _ = stringBuilder.Append(segments[j]).Append(' ');
                logger.LogInformation("// {output}", stringBuilder);
                ProcessStartInfo processStartInfo = new(fileName, arguments)
                {
                    RedirectStandardError = true,
                    RedirectStandardOutput = true,
                    UseShellExecute = false
                };
                try
                {
                    process = Process.Start(processStartInfo);
                    if (process is not null)
                    {
                        for (int j = 1; j < 45; j++)
                        {
                            _ = process.WaitForExit(1000);
                            if (process.HasExited)
                                break;
                        }
                        if (!process.HasExited)
                            logger.LogError("// Never exited!");
                        else
                        {
                            standardError = process.StandardError.ReadToEnd();
                            standardOutput = process.StandardOutput.ReadToEnd();
                            logger.LogInformation("// {error}{line}{line}// {output}", standardError, Environment.NewLine, Environment.NewLine, standardOutput);
                        }
                    }
                }
                catch (Exception ex)
                {
                    logger.LogError(ex, "Error:");
                }
            }
        }
    }

    private static ReadOnlyCollection<string> GetFiles(AppSettings appSettings, string directory)
    {
        ReadOnlyCollection<string> results;
        if (!Directory.Exists(directory))
            _ = Directory.CreateDirectory(directory);
        results = new(Directory.GetFiles(directory, appSettings.CompassConfiguration.Pattern, SearchOption.TopDirectoryOnly));
        return results;
    }

    private static void CopyFiles(AppSettings appSettings, ReadOnlyCollection<string> files)
    {
        string checkFile;
        string triggerFile;
        foreach (string file in files)
        {
            checkFile = Path.Combine(appSettings.CompassConfiguration.Destination, Path.GetFileName(file));
            triggerFile = $"{checkFile}{appSettings.CompassConfiguration.TriggerAppendage}";
            if (File.Exists(checkFile))
                continue;
            if (File.Exists(triggerFile))
                continue;
            File.Copy(file, checkFile);
            File.WriteAllText(triggerFile, string.Empty);
        }
    }

    internal static bool CopyFile(AppSettings appSettings, ILogger<Worker> logger)
    {
        if (_FirstRun)
        {
            _FirstRun = false;
            MapDrives(appSettings, logger);
            logger.LogCritical("MapDrives Done");
        }
        string directory;
        ReadOnlyCollection<string> files;
        DateTime[] dateTimes = [DateTime.Now, DateTime.Now.AddHours(-appSettings.CompassConfiguration.HoursBack)];
        foreach (DateTime dateTime in dateTimes)
        {
            directory = Path.Combine(appSettings.CompassConfiguration.Source, dateTime.ToString(appSettings.CompassConfiguration.YearPattern), dateTime.ToString(appSettings.CompassConfiguration.MonthPattern));
            if (!Directory.Exists(directory))
                _ = Directory.CreateDirectory(directory);
            files = GetFiles(appSettings, directory);
            logger.LogDebug("Found {Files}", files);
            CopyFiles(appSettings, files);
        }
        return true;
    }

}