using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using TeaBox.Macros;
using System.IO;

namespace TeaBox.Build
{
    [Module]
    public class CleanUpMacros
    {
        [Macro(ThreadAffinity.ExecuteAsync, Icon = "nas")]
        [DisplayName("Clean Up Data Preflight Directory")]
        [Category("Robot/NAS")]
        [Browsable(false)]
        [Description("Clean up the data preflight directory")]
        public static void CleanUpDataPreflight(
            IExecutionContext context,
            [DefaultValue(1), ParameterDisplayName("Days To Keep"), Description("")] int numberOfDays)
        {
            foreach (var folder in Directory.GetDirectories(Studio.Paris.CustomBundleFolder()))
            {
                CleanUp(context, folder, 0, numberOfDays);

                if (!System.IO.Directory.EnumerateFileSystemEntries(folder).Any())
                {
                    Directory.Delete(folder);
                    context.LogMessage($"Deleting empty folder {folder}");
                }
            }
        }

        [Macro(ThreadAffinity.ExecuteAsync, Icon = "nas")]
        [DisplayName("Clean Up NAS directory")]
        [Category("Robot/NAS")]
        [Description("Clean up a NAS directory.")]
        public static void CleanUp(IExecutionContext context, string root,
                [DefaultValue(0), ParameterDisplayName("Folders To Keep"), Description("Minimum number of folders to keep in the root folder")]int folderToKeep,
                [DefaultValue(5), ParameterDisplayName("Days To Keep"), Description("")] int numberOfDays)
        {
            if (!System.IO.Directory.Exists(root))
            {
                context.LogWarning("Directory to clean not found : {0}, cleanup is cancelled", root);
                return;
            }

            var dirInfos =
                System.IO.Directory.EnumerateDirectories(root)
                    .Select(dirPath => new System.IO.DirectoryInfo(dirPath))
                    .OrderBy(dirInfo => dirInfo.CreationTime);

            var count = dirInfos.Count();

            // Remove all subdirectories found 
            foreach (var directory in dirInfos)
            {
                context.LogMessage($"Count = {count}");
                context.LogMessage($"Folder to keep = {folderToKeep}");
 
                // Not necessary to clean since there is less version folders than the minimal number we expect to keep
                if (count <= folderToKeep)
                {
                    context.LogMessage("There is only {0} folder(s) remaining at this location, a clean up is not necessary", count);
                    return;
                }

                var actualCreationDate = directory.LastWriteTime.Date.Date;
                context.LogMessage($"Directory Creation Data = {actualCreationDate}");

                var days = (DateTime.Today - actualCreationDate).Days;
                context.LogMessage("Days Between Folder Creation And Today= {days}");

                if (days < numberOfDays)
                {
                    context.LogWarning($"Current folder is not older than {numberOfDays} day(s)");
                    return;
                }

                // Check if the folder should be ignored from the clean up process
                if (System.IO.File.Exists(Path.Combine(directory.FullName, "clean.ignore")))
                {
                    context.LogMessage($"'{directory.FullName}' is older than {numberOfDays} day(s), but will be ignored ");
                    continue;
                }

                // Delete folder
                context.LogMessage($"'{directory.FullName}' is older than {numberOfDays} day(s), it will be cleaned");

                if (!Directory.Exists(directory.FullName))
                    continue;

                try
                {
                    Directory.ForceDelete(directory.FullName);
                    count--;
                }
                catch (DirectoryNotFoundException)
                {
                    context.LogWarning("Directory name too long, trying delete using robocopy MIR feature.");
                    DirectoryDeleteLong(directory.FullName);
                    count--;
                }
                catch (Exception ex)
                {
                    context.LogWarning($"Excetion caught {ex.Message} for directory {directory}");
                }
            }
        }

        [Macro]
        [Browsable(false)]
        public void CleanUpLocalFolder(IExecutionContext context, string folder, bool recursive = false)
        {
            if (Directory.Exists(folder))
            {
                Directory.Delete(folder, recursive);
                context.LogWarning($"{folder} deleted");
            }
            context.LogWarning($"{folder} not found");
        }


        public static void DirectoryDeleteLong(string directoryPath)
        {
            var emptyDirectory = new System.IO.DirectoryInfo(Path.GetTempPath() + "\\TempEmptyDirectory-" + Guid.NewGuid());
            try
            {
                emptyDirectory.Create();
                using (var process = new Process())
                {
                    process.StartInfo.FileName = "robocopy.exe";
                    process.StartInfo.Arguments = "\"" + emptyDirectory.FullName + "\" \"" + directoryPath +
                                                  "\" /mir /r:1 /w:1 /np /xj /sl";
                    process.StartInfo.UseShellExecute = false;
                    process.StartInfo.CreateNoWindow = true;
                    process.Start();
                    process.WaitForExit();
                }
                emptyDirectory.Delete();

                new System.IO.DirectoryInfo(directoryPath).Attributes = FileAttributes.Normal;
                Directory.Delete(directoryPath);
            }
            catch (IOException)
            {
            }
        }
    }

}