using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;


using Newtonsoft.Json.Serialization;
using Newtonsoft.Json;


namespace ServerBase;

public class JsonText : IFormatter
{
	private static readonly JsonSerializerSettings m_serialize_settings = new JsonSerializerSettings();
	private static readonly ContractResolver m_resolver = new ContractResolver();

	public JsonText()
	{
		m_serialize_settings.ContractResolver = m_resolver;
		m_serialize_settings.Converters.Add(new Newtonsoft.Json.Converters.StringEnumConverter());
	}

	public override string toLogString(BusinessLog log)
	{
		return JsonConvert.SerializeObject(log, m_serialize_settings);
	}


	//=============================================================================================
	// Json을 만들때 무시할 property를 등록한다.
	//=============================================================================================
	private class ContractResolver : Newtonsoft.Json.Serialization.DefaultContractResolver
	{
		private readonly Dictionary<Type, HashSet<string>> m_ignores;

		public ContractResolver()
		{
			m_ignores = new Dictionary<Type, HashSet<string>>();
		}

		public void ignoreProperty(Type type, params string[] jsonPropertyNames)
		{
			if (false == m_ignores.ContainsKey(type))
			{
				m_ignores[type] = new HashSet<string>();
			}

			foreach (var prop in jsonPropertyNames)
			{
				m_ignores[type].Add(prop);
			}
		}

		public bool isIgnored(Type type, string jsonPropertyName)
		{
			if (false == m_ignores.ContainsKey(type))
			{
				return false;
			}
			return m_ignores[type].Contains(jsonPropertyName);
		}

		protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
		{
            var property = base.CreateProperty(member, memberSerialization);

			if (property.DeclaringType != null &&
                    property.PropertyName != null &&
                    isIgnored(property.DeclaringType, property.PropertyName))
			{
				property.ShouldSerialize = i => false;
				property.Ignored = true;
			}
			return property;
		}

	}//ContractResolver

}//JsonText