using Ionic.Zip;
using ServerManagerTool.Common.Extensions;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace ServerManagerTool.Common.Utils
{
    public static class ZipUtils
    {
        public static bool DoesFileExist(string zipFile, string entryName)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(entryName))
                throw new ArgumentNullException(nameof(entryName));

            if (!File.Exists(zipFile))
                throw new FileNotFoundException();

            using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
            {
                return zip.Entries.Any(e => !e.IsDirectory && Path.GetFileName(e.FileName).Equals(entryName, StringComparison.OrdinalIgnoreCase));
            }
        }

        public static bool DoesFolderExist(string zipFile, string folderName)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(folderName))
                throw new ArgumentNullException(nameof(folderName));

            if (!File.Exists(zipFile))
                throw new FileNotFoundException();

            using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
            {
                return zip.Entries.Any(e => e.IsDirectory && e.FileName.EndsWith($"{folderName}/", StringComparison.OrdinalIgnoreCase)) 
                    ? true 
                    : zip.Entries.Any(e => !e.IsDirectory && (e.FileName.StartsWith($"{folderName.ToLower()}/", StringComparison.OrdinalIgnoreCase) || e.FileName.ToLower().Contains($"/{folderName.ToLower()}/")));
            }
        }

        public static int ExtractAFile(string zipFile, string entryName, string destinationPath)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(entryName))
                throw new ArgumentNullException(nameof(entryName));
            if (string.IsNullOrWhiteSpace(destinationPath))
                throw new ArgumentNullException(nameof(destinationPath));

            if (!File.Exists(zipFile))
                throw new FileNotFoundException();
            if (!Directory.Exists(destinationPath))
                Directory.CreateDirectory(destinationPath);

            using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
            {
                var selection = zip.Entries.Where(e => Path.GetFileName(e.FileName).Equals(entryName, StringComparison.OrdinalIgnoreCase)).ToList();

                foreach (var entry in selection)
                {
                    entry.Extract(destinationPath, ExtractExistingFileAction.OverwriteSilently);
                }

                return selection.Count;
            }
        }

        public static int ExtractAllFiles(string zipFile, string destinationPath)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(destinationPath))
                throw new ArgumentNullException(nameof(destinationPath));

            if (!Directory.Exists(destinationPath))
                Directory.CreateDirectory(destinationPath);

            using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
            {
                zip.ExtractAll(destinationPath, ExtractExistingFileAction.OverwriteSilently);

                return zip.Entries.Count;
            }
        }

        public static int ExtractFiles(string zipFile, string destinationPath, string sourceFolder = "", bool recurseFolders = false)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(destinationPath))
                throw new ArgumentNullException(nameof(destinationPath));

            if (!Directory.Exists(destinationPath))
                Directory.CreateDirectory(destinationPath);

            if (sourceFolder is null)
                sourceFolder = string.Empty;
            if (sourceFolder.EndsWith("/"))
                sourceFolder = sourceFolder.TrimEnd('/');

            using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
            {
                var selection = new List<ZipEntry>();

                if (recurseFolders)
                {
                    selection.AddRange(zip.Entries.Where(e => !e.IsDirectory && (e.FileName.StartsWith($"{sourceFolder.ToLower()}/", StringComparison.OrdinalIgnoreCase) || e.FileName.ToLower().Contains($"/{sourceFolder.ToLower()}/"))));
                }
                else
                {
                    selection.AddRange(zip.Entries.Where(e => !e.IsDirectory && Path.GetDirectoryName(e.FileName).Equals(sourceFolder, StringComparison.OrdinalIgnoreCase)));
                }

                foreach (var entry in selection)
                {
                    entry.Extract(destinationPath, ExtractExistingFileAction.OverwriteSilently);
                }

                return selection.Count;
            }
        }

        public static void UpdateFiles(string zipFile, IEnumerable<string> filesToZip, string comment = "", bool preserveDirHierarchy = true, string directoryPathInArchive = "")
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));

            if (filesToZip is null || filesToZip.IsEmpty())
                return;

            if (!File.Exists(zipFile))
            {
                ZipFiles(zipFile, filesToZip, comment, preserveDirHierarchy, directoryPathInArchive);
            }
            else
            {
                using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
                {
                    zip.AddFiles(filesToZip.Where(f => !string.IsNullOrWhiteSpace(f) && File.Exists(f)), preserveDirHierarchy, directoryPathInArchive);

                    if (!string.IsNullOrWhiteSpace(comment))
                    {
                        zip.Comment = comment;
                    }

                    zip.Save();
                }
            }
        }

        public static void ZipContent(string zipFile, string entryName, string content)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(entryName))
                throw new ArgumentNullException(nameof(entryName));
            if (string.IsNullOrWhiteSpace(content))
                throw new ArgumentNullException(nameof(content));

            if (!File.Exists(zipFile))
            {
                using (var zip = new ZipFile())
                {
                    zip.AddEntry(entryName, content);

                    zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Default;

                    zip.Save(zipFile);
                }
            }
            else
            {
                using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
                {
                    zip.AddEntry(entryName, content);

                    zip.Save();
                }
            }
        }

        public static void ZipFile(string zipFile, string directoryPath, string fileToZip)
        {
            ZipFile(zipFile, directoryPath, fileToZip, null);
        }

        public static void ZipFile(string zipFile, string directoryPath, string fileToZip, string comment)
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));
            if (string.IsNullOrWhiteSpace(fileToZip))
                throw new ArgumentNullException(nameof(fileToZip));
            if (!File.Exists(fileToZip))
                throw new ArgumentException($"{fileToZip} does not exist or could not be found.");

            if (!File.Exists(zipFile))
            {
                using (var zip = new ZipFile())
                {
                    zip.AddFile(fileToZip, directoryPath);

                    zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Default;
                    if (!string.IsNullOrWhiteSpace(comment))
                    {
                        zip.Comment = comment;
                    }

                    zip.Save(zipFile);
                }
            }
            else
            {
                using (var zip = Ionic.Zip.ZipFile.Read(zipFile))
                {
                    zip.AddFile(fileToZip, directoryPath);

                    if (!string.IsNullOrWhiteSpace(comment))
                    {
                        zip.Comment = comment;
                    }

                    zip.Save();
                }
            }
        }

        public static void ZipFiles(string zipFile, IEnumerable<string> filesToZip, string comment = "", bool preserveDirHierarchy = true, string directoryPathInArchive = "")
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));

            if (filesToZip is null || filesToZip.IsEmpty())
                throw new ArgumentNullException(nameof(filesToZip));

            using (var zip = new ZipFile(zipFile))
            {
                zip.AddFiles(filesToZip.Where(f => !string.IsNullOrWhiteSpace(f) && File.Exists(f)), preserveDirHierarchy, directoryPathInArchive);

                zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Default;
                if (!string.IsNullOrWhiteSpace(comment))
                {
                    zip.Comment = comment;
                }

                zip.Save();
            }
        }

        public static void ZipFiles(string zipFile, Dictionary<string, List<string>> filesToZip, string comment = "")
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));

            if (filesToZip is null || filesToZip.IsEmpty())
                throw new ArgumentNullException(nameof(filesToZip));

            using (var zip = new ZipFile(zipFile))
            {
                foreach (var zipFolder in filesToZip.Keys)
                {
                    zip.AddFiles(filesToZip[zipFolder].Where(f => !string.IsNullOrWhiteSpace(f) && File.Exists(f)), false, zipFolder);
                }

                zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Default;
                if (!string.IsNullOrWhiteSpace(comment))
                {
                    zip.Comment = comment;
                }

                zip.Save();
            }
        }

        public static void ZipFiles(string zipFile, Dictionary<string, List<(string file, string entryName)>> filesToZip, string comment = "")
        {
            if (string.IsNullOrWhiteSpace(zipFile))
                throw new ArgumentNullException(nameof(zipFile));

            if (filesToZip is null || filesToZip.IsEmpty())
                throw new ArgumentNullException(nameof(filesToZip));

            using (var zip = new ZipFile(zipFile))
            {
                foreach (var zipFolder in filesToZip.Keys)
                {
                    filesToZip[zipFolder]
                        .Where(f => !string.IsNullOrWhiteSpace(f.file) && File.Exists(f.file)).ToList()
                        .ForEach(f =>
                        {
                            var zipEntry = zip.AddFile(f.file, zipFolder);
                            var entryName = string.IsNullOrWhiteSpace(f.entryName) ? Path.GetFileName(f.file) : f.entryName;
                            if (string.IsNullOrWhiteSpace(zipFolder))
                            {
                                zipEntry.FileName = entryName;
                            }
                            else
                            {
                                zipEntry.FileName = $"{zipFolder}/{entryName}";
                            }
                        });
                }

                zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Default;
                if (!string.IsNullOrWhiteSpace(comment))
                {
                    zip.Comment = comment;
                }

                zip.Save();
            }
        }
    }
}