/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2021 Thomas Braun, Jens Klingen, Robin Krom
 * 
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 1 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
using System;
using System.Collections.Generic;
using System.Threading;
using log4net;

namespace GreenshotPlugin.Core {
	/// <summary>
	/// Description of InterfaceUtils.
	/// </summary>
	public static class InterfaceUtils {
		private static readonly ILog LOG = LogManager.GetLogger(typeof(InterfaceUtils));

		public static List<Type> GetSubclassesOf(Type type, bool excludeSystemTypes) {
			var list = new List<Type>();
			foreach(var currentAssembly in Thread.GetDomain().GetAssemblies()) {
				try {
					Type[] types = currentAssembly.GetTypes();
                    if (excludeSystemTypes && (!excludeSystemTypes || currentAssembly.FullName.StartsWith("System.")))
                    {
                        continue;
                    }
                    foreach(var currentType in types) {
                        if (type.IsInterface) {
                            if (currentType.GetInterface(type.FullName) != null) {
                                list.Add(currentType);
                            }
                        } else if (currentType.IsSubclassOf(type)) {
                            list.Add(currentType);
                        }
                    }
                } catch (Exception ex) {
					LOG.WarnFormat("Problem getting subclasses of type: {0}, message: {1}", type.FullName, ex.Message);
				}
			}
			return list;
		}
    }
}