using Newtonsoft.Json;
using System;
using System.IO;
using System.Text;
using System.Xml.Serialization;

namespace Sarand.Net.Standard.Base.Utils
{
	//=======================================================================
	public static class SerializableUtil
	{
		//-------------------------------------------------------------------
		/// <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 DeepCopy<T>(T source)
		{
			// Don't serialize a null object, simply return the default for that object
			if (Object.ReferenceEquals(source, null))
				return default(T);

			// initialize inner objects individually
			// for example in default constructor some list property initialized with some values,
			// but in 'source' these items are cleaned -
			// without ObjectCreationHandling.Replace default constructor values will be added to result
			var deserializeSettings = new JsonSerializerSettings { ObjectCreationHandling = ObjectCreationHandling.Replace };

			return JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(source), deserializeSettings);
		}

		//-------------------------------------------------------------------
		// Serialize using JSON.
		public static String ToJson<T>(T source)
		{
			// Don't serialize a null object, simply return the default for that object
			if (Object.ReferenceEquals(source, null)) return "";
			// Serialise to JSON String.
			return JsonConvert.SerializeObject(source);
		}

		//-------------------------------------------------------------------
		// Serialize using XML.
		public static String ToXml<T>(T source)
		{
			XmlSerializer serializer = new XmlSerializer(typeof(T));
			using (Stream stream = new MemoryStream())
			{
				serializer.Serialize(stream, source);
				stream.Seek(0, SeekOrigin.Begin);
				var streamReader = new StreamReader(stream);
				return streamReader.ReadToEnd();
			}
		}
		public static T FromXml<T>(String data)
		{
			XmlSerializer serializer = new XmlSerializer(typeof(T));
			using (Stream stream = new MemoryStream(Encoding.Unicode.GetBytes(data ?? "")))
			{
				return (T)serializer.Deserialize(stream);
			}
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}