using BeWoLauncher.ServiceProxy;
using BS.SharedLauncher;
using BS.SharedLauncher.DataContract;
using BS.SharedLauncher.Exceptions;
using BS.SharedLauncher.Extensions;
using BS.SharedLauncher.Information;
using BS.SharedLauncher.Logic;
using BS.SharedLauncher.Update;
using BS.SharedLauncher.Utils;
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Xml.Serialization;

namespace BeWoLauncher.Utils.Update
{
    public class UpdateFileManager
    {
        public DownloadPlanerRequestDC Request { get; set; }
        public DownloadPlanerResponseDC Response { get; set; }
        public string DownloadZipPath { get; set; }

        public string DownloadFolder => BeWoPaths.GetDownloadPath();
        public string ApplyFolder => BeWoPaths.GetApplyPath();

        public UpdateFileManager()
        {
            Request = null;
            Response = null;
        }

        public void StartUpdate(bool skipLock)
        {
            CreateUpdateRequest();
            GetUpdateResponse();

            if (!Response.HasToDo())
            {
                return;
            }

            if (Response.HasToDoNewZip())
            {
                StartDownload(skipLock);
            }

            StartApply(skipLock);
            DownloadFolder.ClearFolder();
        }

        private void CreateUpdateRequest()
        {
            Request = new DownloadPlanerRequestDC();

            Request.PlanerRootFolderExists = DownloadFolder.Exists();

            if (Request.DownloadFolderExists = DownloadFolder.Exists())
                if (!(Request.DownloadFolderIsEmpty = DownloadFolder.IsFolderEmpty()))
                    Request.DownloadedPackages = FileController.LoadInfos(DownloadFolder);

            if (Request.ApplyFolderExists = ApplyFolder.Exists())
                if (!(Request.ApplyFolderIsEmpty = ApplyFolder.IsFolderEmpty()))
                    if (FileController.TryGetPackageInfo(BeWoPaths.GetApplyPackagePath(), out var planer))
                        Request.ApplyPackage = planer;
        }

        private void GetUpdateResponse()
        {
            Response = LauncherServiceFacade.DoDownloadBeWoServiceSync(x => x.Download2(Request));
        }

        private void StartDownload(bool skiplock)
        {
            DownloadFolder.CreateFolder();

            DownloadFolder.Lock(skiplock);

            DownloadZipPath = FileController.GetNewZipPath(BeWoPaths.GetDownloadPath());

            FileController.SaveDZip(DownloadZipPath, Response.NewZipData);
            FileController.SaveInfo(DownloadZipPath, Response.NewZipInfo);
            FileController.SaveInfo(BeWoPaths.GetDownloadPackagePath(), Response.LatestApplicationInfo);

            Response.NewZipData = null;

            DownloadFolder.Unlock();
        }

        private void StartApply(bool skiplock)
        {
            ApplyFolder.CreateFolder();

            ApplyFolder.Lock(skiplock);

            if (Response.HasToDoDownload2Keep())
            {
                FileController.ApplyDZip(Response.DownloadFilesToKeep, ApplyFolder);
            }

            if (Response.HasToDoNewZip())
            {
                FileController.ApplyDZip(DownloadZipPath, ApplyFolder);
            }

            if (Response.HasToRemoveFiles)
            {
                
            }
                
            // Überschreibe alle lokalen Dateien mit dem Update
            //private void ApplyDZip(string path, PlanerPackageInfoDC planer)
            //{
            //using (ZipArchive archive = ZipFile.OpenRead(path))
            //{
            //    foreach (ZipArchiveEntry entry in archive.Entries)
            //    {
            //        var planerFileInfo = PlanerPackage.FindPlanerFile(entry.Name);

            //        entry.ExtractToFile(ApplyPath.Combine(entry.Name), true);
            //    }
            //}
            //}

            //// Entferne alte Dateien
            //// Überprüfe mit neuer Version Xml
            //var applyFiles = Directory.EnumerateFileSystemEntries(ApplyPath);
            //foreach (var file in applyFiles)
            //{
            //    var relative = PathUtils.MakeRelativePath(ApplyPath, file);

            //    if (PlanerPackage.FirstOrDefaultPlanerFile(relative) is object)
            //        continue;

            //    if (relative == BeWoPaths.GetLockFileName())
            //        continue;

            //    File.Delete(file);
            //}

            //// Überschreibe Update Version
            //File.WriteAllText(BeWoPaths.GetVersionXmlPath(), PlanerVersionXml);

            ////UnlockApply();
            ///

            throw new NotImplementedException();
        }
        
        // RE Auslagern
        
    }
}