using MongoDB.Bson;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Admin.NET.Core;
public class ObjectIdConverter : JsonConverter<ObjectId>
{
    public override ObjectId ReadJson(JsonReader reader, Type objectType, ObjectId existingValue, bool hasExistingValue, JsonSerializer serializer)
    {
        if (reader.Value is string value && ObjectId.TryParse(value, out var objectId))
        {
            return objectId;
        }

        return existingValue;
    }

    public override void WriteJson(JsonWriter writer, ObjectId value, JsonSerializer serializer)
    {
        writer.WriteValue(value.ToString());
    }
}


// 自定义 JsonConverter
public class CustomListConverter : JsonConverter<List<string>>
{
    public override List<string> ReadJson(JsonReader reader, Type objectType, List<string> existingValue, bool hasExistingValue, JsonSerializer serializer)
    {
        // 处理空值的情况
        if (reader.TokenType == JsonToken.Null)
            return new List<string>();

        // 使用默认的 List<string> 反序列化
        return serializer.Deserialize<List<string>>(reader);
    }

    public override void WriteJson(JsonWriter writer, List<string> value, JsonSerializer serializer)
    {
        // 序列化时将空的 List<string> 转换为 null
        if (value == null || value.Count == 0)
            writer.WriteNull();
        else
            serializer.Serialize(writer, value);
    }
}