/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2016 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.IO;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace GreenshotPlugin.Core {
	/// <summary>
	/// Extension methods which work for objects
	/// </summary>
	public static class ObjectExtensions {
	
		/// <summary>
		/// Perform a deep Copy of the object.
		/// </summary>
		/// <typeparam name="T">The type of object being copied.</typeparam>
		/// <param name="source">The object instance to copy.</param>
		/// <returns>The copied object.</returns>
		public static T Clone<T>(this T source)
		{
			var typeparam = typeof(T);
			if (!typeparam.IsInterface && !typeparam.IsSerializable)
			{
				throw new ArgumentException("The type must be serializable.", nameof(source));
			}

			// Don't serialize a null object, simply return the default for that object
			if (source == null) {
				return default(T);
			}
	
			IFormatter formatter = new BinaryFormatter();
			using (var stream = new MemoryStream()) {
				formatter.Serialize(stream, source);
				stream.Seek(0, SeekOrigin.Begin);
				return (T)formatter.Deserialize(stream);
			}
		}
	
		/// <summary>
		/// Clone the content from source to destination
		/// </summary>
		/// <typeparam name="T">Type to clone</typeparam>
		/// <param name="source">Instance to copy from</param>
		/// <param name="destination">Instance to copy to</param>
		public static void CloneTo<T>(this T source, T destination) {
			var type = typeof(T);
			var myObjectFields = type.GetFields(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);

			foreach (var fieldInfo in myObjectFields) {
				fieldInfo.SetValue(destination, fieldInfo.GetValue(source));
			}
			var myObjectProperties = type.GetProperties(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);

			foreach (var propertyInfo in myObjectProperties) {
				if (propertyInfo.CanWrite) {
					propertyInfo.SetValue(destination, propertyInfo.GetValue(source, null), null);
				}
			}
		}

		/// <summary>
		/// Compare two lists
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="l1">IList</param>
		/// <param name="l2">IList</param>
		/// <returns>true if they are the same</returns>
		public static bool CompareLists<T>(IList<T> l1, IList<T> l2) {
			if (l1.Count != l2.Count) {
				return false;
			}
			int matched = 0;
			foreach(T item in l1) {
				if (!l2.Contains(item)) {
					return false;
				}
				matched++;
			}
			return matched == l1.Count;
		}
	}
}