using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DocumentFormat.OpenXml.Vml.Office;

namespace MECF.Framework.Common.Utilities
{

    public static class ZIPUtil
    {

        public static async Task ZipAllExceptLogFolderAsync(string sourceFolder, string outputZipPath)
        {
            using (FileStream zipToOpen = new FileStream(outputZipPath, FileMode.Create))
            {
                using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Create))
                {
                    await CopyFilesAndDirectoriesAsync(sourceFolder, "", archive);
                }
            }
        }

        private static async Task CopyFilesAndDirectoriesAsync(string sourceDir, string parentEntryName, ZipArchive archive)
        {
            // Add an entry for the current directory if it's not empty or skipped
            if (!string.IsNullOrEmpty(parentEntryName) && !Directory.GetFiles(sourceDir).Any() && !Directory.GetDirectories(sourceDir).Any())
            {
                string entryName = parentEntryName + "/";
                archive.CreateEntry(entryName);
            }

            foreach (string file in Directory.GetFiles(sourceDir))
            {
                string entryName = Path.Combine(parentEntryName, Path.GetFileName(file));
                ZipArchiveEntry entry = archive.CreateEntry(entryName);

                using (Stream entryStream = entry.Open())
                using (Stream fileStream = File.OpenRead(file))
                {
                    await fileStream.CopyToAsync(entryStream);
                }
            }

            foreach (string directory in Directory.GetDirectories(sourceDir))
            {
                string dirName = Path.GetFileName(directory);
                if (dirName.Contains("Log") || dirName.Equals("ZIP", StringComparison.OrdinalIgnoreCase))
                {
                    continue; // Skip the Log and ZIP folders
                }

                string entryName = Path.Combine(parentEntryName, dirName);
                await CopyFilesAndDirectoriesAsync(directory, entryName, archive);
            }

            // Add an entry for the current directory if it contains only subdirectories
            if (!string.IsNullOrEmpty(parentEntryName) && !Directory.GetFiles(sourceDir).Any())
            {
                string entryName = parentEntryName + "/";
                archive.CreateEntry(entryName);
            }
        }
        }
}