using BS.SharedLauncher.DataContract;
using BS.SharedLauncher.Extensions;
using BS.SharedLauncher.Information;
using BS.SharedLauncher.Update;
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BS.SharedLauncher.Logic
{
    public static class FileController
    {
        private static string ZipFormatName => BeWoPathFileConfig.ZipFormatName;
        private static string DotBeWoInfo => BeWoPathFileConfig.DotBeWoInfo;

        public static string GetDZipPath(string root, int number) => Path.Combine(root, string.Format(ZipFormatName, getFileNumberCountString(number)));
        public static string GetDZipInfoPath(string root, int number) => GetDZipPath(root, number) + DotBeWoInfo;

        public static void ApplyDZip(Dictionary<string, List<string>> zip2keepfiles, string destinationfolder)
        {
            foreach (var pair in zip2keepfiles)
            {
                ApplyDZip(pair.Key, destinationfolder, pair.Value.Contains);
            }
        }
        public static void ApplyDZip(string zipfilepath, string destinationfolder) 
            => ApplyDZip(zipfilepath, destinationfolder, (s) => true);
        private static void ApplyDZip(string zipfilepath, string destinationfolder, Func<string, bool> isValidFunc)
        {
            using (ZipArchive archive = ZipFile.OpenRead(zipfilepath))
            {
                foreach (ZipArchiveEntry entry in archive.Entries)
                {
                    if (isValidFunc(entry.Name))
                    {
                        entry.ExtractToFile(destinationfolder.Combine(entry.Name), true);
                    }
                }
            }
        }

        public static List<string> GetValidDZipPaths(string path)
        {
            var res = new List<string>();

            var dir = new DirectoryInfo(path);
            var files = dir.GetFiles("*.zip");

            foreach (var file in files)
            {
                if (file.FullName.IsDZipValid())
                    res.Add(file.FullName);
            }

            return res;
        }
        public static string GetNewZipPath(string root)
        {
            int i = 0;
            string temp = string.Empty;

            do
            {
                temp = GetDZipPath(root, i++);

            } while (temp.IsDZipValidAndDeleteIfNot());

            return temp;
        }
        public static void SaveDZip(string path, byte[] data)
        {
            File.WriteAllBytes(path, data);
        }
        public static void SaveInfo<T>(string path, T t)
            where T : class
        {
            File.WriteAllText(path.WithInfoExtension(), XmlConverter.Serialize<T>(t));
        }
        public static PlanerPackageInfoDC LoadInfo(string filepath)
        {
            filepath = filepath.WithInfoExtension();

            var xml = File.ReadAllText(filepath);
            var obj = XmlConverter.Deserialize<PlanerPackageInfoDC>(xml);

            return obj;
        }

        public static bool TryGetPackageInfo(string filepath, out PlanerPackageInfoDC planerPackageInfoDC)
        {
            planerPackageInfoDC = null;

            try
            {
                planerPackageInfoDC = LoadInfo(filepath);
            }
            catch (Exception)
            {
                return false;
            }
            return true;
        }
        public static Dictionary<string, PlanerPackageInfoDC> LoadInfos(string rootfolder)
        {
            var allDZips = GetValidDZipPaths(rootfolder);

            if (allDZips is null || !allDZips.Any())
                return null;

            return allDZips.ToDictionary(dzip => dzip, dzip => LoadInfo(dzip));

            // Detailed Debug Section
            //var res = new Dictionary<string, PlanerPackageInfoDC>();

            //foreach (var dzip in allDZips)
            //{
            //    res.Add(dzip, GetPackageInfo(dzip));
            //}

            //return res;
        }
        public static List<PlanerFileInfo> GetPlanerFiles(string path)
        {
            var res = new List<PlanerFileInfo>();

            // Sollte der Path ohne / enden, wird der unterordner mit angegeben 
            // Deshalb manuell hinzufügen, falls nicht vorhanden

            if (!path.EndsWith(Path.DirectorySeparatorChar.ToString()))
                path += Path.DirectorySeparatorChar;

            getPlanerFilesRecursive(new DirectoryInfo(path), path, ref res);
            return res;
        }

        public static bool IsDZipValidAndDeleteIfNot(this string path)
        {
            if (path.IsDZipValid())
                return true;

            new FileInfo(path).Delete();
            new FileInfo(path + BeWoPathFileConfig.DotBeWoInfo).Delete();

            return false;
        }
        public static bool IsDZipValid(this string path)
        {
            return path.Exists() && (path + BeWoPathFileConfig.DotBeWoInfo).Exists();
        }
        public static string WithInfoExtension(this string path)
        {
            if (path.EndsWith(DotBeWoInfo))
                return path;

            return path + DotBeWoInfo;
        }

        private static void getPlanerFilesRecursive(DirectoryInfo directoryInfo, string relativeTo, ref List<PlanerFileInfo> files)
        {
            foreach (var item in directoryInfo.GetDirectories())
            {
                getPlanerFilesRecursive(item, relativeTo, ref files);
            }

            foreach (var item in directoryInfo.GetFiles())
            {
                var file = new PlanerFileInfo(item, relativeTo);

                files.Add(file);
            }
        }
        private static string getFileNumberCountString(int i)
        {
            if (i == 0)
                return string.Empty;
            return $"({i})";
        }
    }
}