using System;
using Newtonsoft.Json;
using XP.Hardware.RaySource.Comet.Messages.Commands;
using XP.Hardware.RaySource.Comet.Messages.Responses;

namespace XP.Hardware.RaySource.Comet.Messages
{
    /// <summary>
    /// 消息序列化工具类
    /// 封装 Newtonsoft.Json 序列化/反序列化逻辑
    /// </summary>
    public static class MessageSerializer
    {
        /// <summary>
        /// JSON 序列化设置
        /// TypeNameHandling.Auto：保留类型信息以支持多态反序列化
        /// NullValueHandling.Ignore：忽略 null 值减少传输量
        /// Formatting.None：单行输出配合行协议
        /// </summary>
        private static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
        {
            TypeNameHandling = TypeNameHandling.All,
            NullValueHandling = NullValueHandling.Ignore,
            Formatting = Formatting.None
        };

        /// <summary>
        /// 将对象序列化为 JSON 字符串
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="obj">要序列化的对象</param>
        /// <returns>JSON 字符串</returns>
        public static string Serialize<T>(T obj)
        {
            return JsonConvert.SerializeObject(obj, Settings);
        }

        /// <summary>
        /// 将 JSON 字符串反序列化为指定类型的对象
        /// </summary>
        /// <typeparam name="T">目标类型</typeparam>
        /// <param name="json">JSON 字符串</param>
        /// <returns>反序列化后的对象，失败时返回 null</returns>
        public static T Deserialize<T>(string json) where T : class
        {
            try
            {
                return JsonConvert.DeserializeObject<T>(json, Settings);
            }
            catch (JsonException)
            {
                return null;
            }
        }

        /// <summary>
        /// 将 JSON 字符串反序列化为命令对象
        /// 根据类型信息还原为正确的命令子类实例
        /// </summary>
        /// <param name="json">JSON 字符串</param>
        /// <returns>命令对象，失败时返回 null</returns>
        public static RaySourceCommand DeserializeCommand(string json)
        {
            try
            {
                return JsonConvert.DeserializeObject<RaySourceCommand>(json, Settings);
            }
            catch (JsonException)
            {
                return null;
            }
        }

        /// <summary>
        /// 将 JSON 字符串反序列化为响应对象
        /// 根据类型信息还原为正确的响应子类实例
        /// </summary>
        /// <param name="json">JSON 字符串</param>
        /// <returns>响应对象，失败时返回 null</returns>
        public static RaySourceResponse DeserializeResponse(string json)
        {
            try
            {
                return JsonConvert.DeserializeObject<RaySourceResponse>(json, Settings);
            }
            catch (JsonException)
            {
                return null;
            }
        }
    }
}