using Newtonsoft.Json;
using System;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Security.Cryptography;
using System.Text;

/// <summary>
/// 网络同步数据基类 2022.5.27 gwang
/// </summary>
public abstract class Base_NetSyncData : INetSyncData, INotifyPropertyChanged
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
    protected class JsonRawAttribute : Attribute
    {

    }

    public Base_NetSyncData() => this.PropertyChanged += (s, e) => IsChanged = true;

    [JsonIgnore]
    public virtual bool IsChanged { get; private set; }

    public event PropertyChangedEventHandler? PropertyChanged;
    protected void NotifyPropertyChanged([CallerMemberName] string propertyName = "") =>
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

    /// <summary>需要在actor线(协)程内部调用才安全</summary>
    public virtual void ClearChanges() => this.IsChanged = false;
    /// <summary>
    /// 序列化为json串
    /// </summary>
    virtual public string Json() => JsonConvert.SerializeObject(this);

    public override string ToString()
    {
        return this.Json();
    }
    /// <summary>
    /// 计算自身数据(序列化为json串后)的MD5值
    /// </summary>
    /// <param name="tolower">是否转为小写字符串,默认:false</param>
    virtual public string Md5(bool tolower = false)
    {
        var sb = new StringBuilder();
        var md5 = MD5.Create();
        byte[] hash = md5.ComputeHash(Encoding.UTF8.GetBytes(Json()));          // 计算MD5的值
        hash.ToList().ForEach(i => sb.Append(tolower ? $"{i:x2}" : $"{i:X2}")); // 转为32位16进制字大写(或者小写)符串
        return sb.ToString();
    }

}