using DesktopTools.Interfaces;
using ModuleTools.Extensions;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

namespace DesktopTools.BusinessLogics
{
	public static partial class DesktopLoader
	{
		private static readonly string _pathToWindowDestopExt = "..\\..\\..\\..\\WindowDestopExtensions\\";

		/// <summary>
		/// Загрузка всех классов-реализаций IWindowDesktopExtension
		/// </summary>
		/// <returns></returns>
		public static List<IWindowDesktopExtension> GetWindowDesktopExtensions()
		{
			var list = new List<IWindowDesktopExtension>();
			if (Directory.Exists(_pathToWindowDestopExt))
			{
				var files = Directory.GetFiles(_pathToWindowDestopExt, "*.dll", SearchOption.AllDirectories);
				var loadedFiles = new List<string>();
				foreach (var file in files.Distinct())
				{
					if (loadedFiles.Contains(file.GetFileName()))
					{
						continue;
					}
					Assembly asm = Assembly.LoadFrom(file);
					foreach (var t in asm.GetExportedTypes())
					{
						if (t.IsClass && typeof(IWindowDesktopExtension).IsAssignableFrom(t))
						{
							list.Add((IWindowDesktopExtension)Activator.CreateInstance(t));
						}
					}
					loadedFiles.Add(file.GetFileName());
				}
			}
			return list;
		}
	}
}