using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
//----------------------------------------------------------------
//Module Name:  $safeprojectname$
//Purpose:      
//CopyRight:    Muchinfo
//History:
//----------------------------------------------------------------
//DateTime		2016/1/18 9:40:42
//Author       
//Description   Create
//----------------------------------------------------------------
using ProtoBuf;
using tas;

namespace Muchinfo.MTPClient.Adapter.Utilities
{

    /// <summary>
    /// ProtoBuf序列化反序列化帮助类
    /// </summary>
    public class ProtoBufHelper
    {
        /// <summary>
        /// 登录保存的内容消息头
        /// </summary>
        public static MessageHead Head { get; set; }

        /// <summary>
        /// 实体使用ProtoBuf格式序列化
        /// </summary>
        /// <typeparam name="T">实体对象类型</typeparam>
        /// <param name="entity">实体对象</param>
        /// <param name="withoutHead">是否包括头</param>
        /// <returns>序列化后的字节</returns>
        public static byte[] EntitySerialize<T>(T entity, bool withoutHead = true)
        {
            if (withoutHead)
            {
                var type = entity.GetType();
                var property = type.GetProperty("Header");
                if (property != null && property.PropertyType.Equals(typeof(MessageHead)))
                {
                    //todo:Head，要传交易端的时间
                    if (Head != null)
                    {
                        var uuid = Guid.NewGuid();
                        property.SetValue(entity, new MessageHead() { AccountID = Head.AccountID, UserID = Head.UserID, UUID = uuid.ToString() }, null);
                    }
                }
            }
            using (System.IO.MemoryStream mStream = new MemoryStream())
            {
                Serializer.Serialize(mStream, entity);
                mStream.Position = 0;
                var buffer = new byte[mStream.Length];
                mStream.Read(buffer, 0, buffer.Length);
                mStream.Close();
                return buffer;
            }
        }

        /// <summary>
        /// 反序列化实体
        /// </summary>
        /// <typeparam name="T">实体对象类型</typeparam>
        /// <param name="buffer">The buffer.</param>
        /// <returns>``0.</returns>
        public static T EntityDeSerialize<T>(byte[] buffer)
        {
            using (var mStream = new MemoryStream(buffer))
            {
                mStream.Position = 0;

                var entity = Serializer.Deserialize<T>(mStream);
                mStream.Close();
                return entity;
            }
        }

    }
}