using Gremlin_BlazorServer.Data.EntityClasses;
using System.Diagnostics;
using System.Reflection;
using System.Text;
//using Outlook = Microsoft.Office.Interop.Outlook;

namespace Gremlin_BlazorServer.Services
{
	internal static class FileService
	{
		private static readonly Encoding defaultEncodingIfNoBom = Encoding.UTF8;
		private static readonly string currentDirectory = Directory.GetCurrentDirectory();

		public static string ReadResource(string name)
		{
			Assembly assembly = Assembly.GetExecutingAssembly();

			// Format: "{Namespace}.{Folder}.{filename}.{Extension}"
			string resourcePath = name.StartsWith(nameof(Gremlin_BlazorServer))
				? name
				: assembly.GetManifestResourceNames().Single(str => str.EndsWith(name));

			using Stream? stream = assembly.GetManifestResourceStream(resourcePath);
			if (stream == null) { return ""; }

			using StreamReader reader = new(stream);
			return reader.ReadToEnd();
		}

		// public static string GetFilepathFromUser(string filter = "Delimited Data File|*.csv; *.txt; *.tsv")
		// {
		// 	string _filepath = "";
		// 	OpenFileDialog dlg = new()
		// 	{
		// 		Multiselect = false,
		// 		Filter = filter
		// 	};

		// 	if (dlg.ShowDialog() == true)
		// 	{
		// 		//Auswahl dlg.filenames an passende Objekte übergeben
		// 		_filepath = dlg.FileName;
		// 	}
		// 	return _filepath;
		// }

		internal static void OpenFile(string path, string file, string type)
		{
			try
			{
				_ = Process.Start(path == "" ? $"{file}.{type}" : $"{path}{Path.DirectorySeparatorChar}{file}.{type}");
			}
			catch (Exception ex)
			{
				Debug.WriteLine(ex);
			}
		}

		public static Encoding GetEncoding(string fileName)
		{
			Stream fileStream = File.OpenRead(fileName);
			using StreamReader reader = new(fileStream, defaultEncodingIfNoBom, true);
			_ = reader.Peek();
			Encoding encoding = reader.CurrentEncoding;
			return encoding;
		}

		public static void WriteClipboardToTsv(string clipboard, Quote quote)
		{
			string datei = $"{quote.Path}{Path.DirectorySeparatorChar}{quote.QuotationNumber}.tsv";
			FileInfo fileInfo = new(datei);

			if (fileInfo.Directory == null) return;

			if (!fileInfo.Directory.Exists)
			{
				try { Directory.CreateDirectory(fileInfo.DirectoryName ?? ""); }
				catch (Exception ex) { Debug.WriteLine(ex); }
			}

			using StreamWriter writer = new(datei, false, Encoding.UTF8);
			{
				writer.WriteLine(clipboard);
			}
		}

		public static void WriteTexFile(Quote quote)
		{
			string datei = $"{quote.Path}{Path.DirectorySeparatorChar}{quote.QuotationNumber}.tex";

			FileInfo fileInfo = new(datei);

			if (fileInfo.Directory == null) return;


			if (!fileInfo.Directory.Exists) { Directory.CreateDirectory(fileInfo.DirectoryName ?? ""); }

			using StreamWriter writer = new(datei, false, Encoding.UTF8);
			{
				writer.WriteLine(quote.Tex);
			}
		}

		//public static void SendQuoteViaMail(QuoteVM quoteVM)
		//{
		//	Outlook.Application application = new();

		//	Outlook.MailItem mail = application.CreateItem(Outlook.OlItemType.olMailItem) as Outlook.MailItem;

		//	mail.Subject = quoteVM.QuoteNumber;
		//	Outlook.AddressEntry currentUser = application.Session.CurrentUser.AddressEntry;

		//	if (currentUser.Type == "EX")
		//	{
		//		Outlook.ExchangeUser manager = currentUser.GetExchangeUser().GetExchangeUserManager();
		//		// Add recipient using display name, alias, or smtp address
		//		mail.Recipients.Add(manager.PrimarySmtpAddress);
		//		mail.Recipients.ResolveAll();
		//		mail.Attachments.Add($"{quoteVM.QuoteNumber}.pdf", Outlook.OlAttachmentType.olByValue, Type.Missing, Type.Missing);
		//		mail.Send();
		//	}
		//}
	}
}