using System.Collections.Concurrent;
using System.Globalization;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace BrilliantSightClient.Model.Extension;

public static class CommonExtension
{
    /// <summary>
    /// 安全的ToString
    /// </summary>
    /// <param name="obj"></param>
    /// <returns></returns>
    public static string ToSafeString(this object obj)
    {
        if (null == obj)
        {
            return "";
        }
        else
        {
            return obj.ToString();
        }
    }
    // 缓存类型是否重写ToString的检查结果（提升性能）
    private static readonly ConcurrentDictionary<Type, bool> _toStringOverriddenCache = new();

    /// <summary>
    /// 增强版安全ToString（自动处理未重写ToString的情况）
    /// </summary>
    public static string ToSafeAbundantString(this object obj)
    {
        if (obj == null) return "";

        var type = obj.GetType();
        
        // 判断是否重写了ToString方法
        var hasCustomToString = _toStringOverriddenCache.GetOrAdd(type, t => 
        {
            var toStringMethod = t.GetMethod("ToString", Type.EmptyTypes);
            return toStringMethod?.DeclaringType != typeof(object);
        });

        try
        {
            string result = hasCustomToString
                ? obj.ToString() // 使用自定义的ToString
                : JsonConvert.SerializeObject(obj);
            return result;
        }
        catch (Exception e)
        { 
            return obj.ToString();
        }


    }
    
    
    

    /// <summary>
    /// 生成对象签名（Null对象为时间戳）
    /// </summary>
    /// <param name="obj"></param>
    /// <returns></returns>
    public static string GenerateSign(this object obj)
    {
        if (null == obj)
        {
            return Helper.Common.GenerateMd5Hash(DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss.fff"));
        }
        else
        {
            var str = $"{DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss.fff")}-{obj.GetHashCode()}-{Helper.Common.AesKey}";
            return Helper.Common.GenerateMd5Hash(str);
        }
    }
    
    

    // public static string ConvertNumberToString(this ob value)
    // {
    //     return "";
    // }
}